What is the cheapest airline that flies from Denver Intl to San Diego?

Frontier, Alaska Airlines, and Southwest are the most popular carriers operating from Denver Intl to San Diego

How many flights depart from Denver to San Diego on average per day?

19 flights are operational daily from Denver to San Diego as of October 2025. The most popular departure time for this route is 3:00PM, with 35% of flights per day taking off in the afternoon.

What airlines fly to San Diego?

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to San Diego from Denver according to our data. Frontier is the first choice among our users, with 58% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 8 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

How many flights depart from Denver to San Diego on average per week?

135 flights are operational weekly from Denver to San Diego as of October 2025. The most popular departure day for this route is Thu, with 22% of flights per week taking off on this day.

Which airlines fly direct from Denver to San Diego?

When you are looking for a flight from Denver to San Diego, you'll most likely be taking off from the Denver International Airport (DEN) and landing at the San Diego International Airport (SAN). Airlines offering direct flights between these two airports include Frontier, United, and Southwest. American Airlines offers flights between DEN and SAN with one stop in cities such as Dallas, Charlotte, Boston, New York (JFK), and Chicago. Delta offers one-stop flights with stops in cities including Salt Lake City, Los Angeles, Seattle, and Minneapolis. United offers flights that stop once in Houston, San Francisco, New York (JFK), and Los Angeles. You can catch a flight on Southwest that stops once in Sacramento, Salt Lake City, or San Jose, CA. Alaska offers flights that stop once in Phoenix, Portland, Seattle, or Dallas, and Frontier offers flights with one stop in Las Vegas or Atlanta. You can even find the occasional JetBlue flight that stops once in Boston. What is the best way to get in and out of airports in Denver and San Diego? One of the most efficient ways to get from downtown Denver Union Station to Denver International Airport (DEN) is to take an RTD (Regional Transportation District) A Line train, which will get you to the airport in about 37 minutes. These trains depart Union Station about every 20 minutes. You can also take a series of three RTD buses, starting with number 0, changing to FF1, and then to AB1. This trip will take approximately 1h 24min. A taxi, rental car, private limo, or ride app car should take about 31 minutes. Once you arrive in San Diego, to get from San Diego International Airport (SAN) into the city center, you can catch a 992 San Diego Metro Transit bus at Lindbergh Field &Terminal 1 and take it to the intersection of Broadway & State Street in about 16 minutes. Taking a taxi, rental car, or ride app car will take about 5 minutes. What are the benefits of the different airports in Denver and San Diego? When you book your flight from Denver to San Diego, you'll be departing from the Denver International Airport (DEN), essentially the only option. This airport is vast and has a modern design to help make travel more efficient. You will enter a main terminal, the Jeppesen terminal, where you will find ticketing and security for all flights. You will then proceed to either concourse A, B, or C in order to catch your flight – the journey to the different concourses involves underground trains and shuttles, so leave 30 to 45 minutes for this. If you need to return a rental car before you catch your flight, you can catch a shuttle from the rental car agency to Jeppesen. Your arrival airport, the San Diego International Airport (SAN), has a number of services and amenities, some of which you may need to use right away, such as baby care facilities and pet relief areas. From the arrivals curb, you can take a free shuttle to the rental car center. Which cities can you get to from the San Diego International Airport? San Diego International Airport (SAN), located at the southwestern tip of California, and therefore the southwestern tip of the entire country, provides access to a number of surrounding communities. One of the most popular destinations from San Diego is the Mexican city of Tijuana, which is across the American-Mexican border, less than an hour's drive away. On public transportation, you can take the 992 bus to the Santa Fe train station and from there, take the Trolley to the border, then walk across. If you want to drive across, your best bet is to get a rental car. Palm Springs is also a popular destination, located about 130 miles to the northeast of SAN. From SAN, you can take a San Diego flyer bus to the Old Town Transit center and then switch to either bus 2037, 2017, or 2006. Once you reach the Anaheim Regional Transportation Intermodel Center, you will change to bus F20056.

When did momondo last update prices for flights from Denver Intl Airport to San Diego Airport?

Prices for flights from Denver Intl Airport to San Diego Airport were last updated today.

How many operators does momondo search for flights from Denver Intl Airport to San Diego Airport?

As of October 2025, there are 5 operators available to choose from for flights from Denver Intl Airport to San Diego Airport.

How old do you have to be to fly from Denver Intl Airport to San Diego Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Denver Intl Airport to San Diego Airport.

What documentation or ID do you need to fly to San Diego Airport?

The required travel and health documents for your San Diego Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Diego Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$49 Cheap Flights from Denver to San Diego in 2025/26

Q: What is the typical price of a round-trip flight between Denver and San Diego?

Prices are currently low for flights on this route. Typical prices usually range from $108 to $231. The lowest price recently found on this route was $80.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Denver to San Diego

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:29 pm - 11:50 pmDEN-SAN

2h 21mnonstop

6:41 am - 10:18 amSAN-DEN

2h 37mnonstop

$80Frontier

Find Deal

mié., oct. 22 - dom., oct. 26

10:29 pm - 11:50 pmDEN-SAN

2h 21mnonstop

2:24 pm - 5:57 pmSAN-DEN

2h 33mnonstop

$81Frontier

Find Deal

jue., oct. 23 - sáb., oct. 25

10:29 pm - 11:50 pmDEN-SAN

2h 21mnonstop

5:41 am - 9:18 amSAN-DEN

2h 37mnonstop

$82Frontier

Find Deal

vie., oct. 31 - dom., nov. 2

2:34 pm - 4:00 pmDEN-SAN

2h 26mnonstop

6:41 am - 10:18 amSAN-DEN

2h 37mnonstop

$83Frontier

Find Deal

vie., nov. 7 - jue., nov. 13

3:00 pm - 4:23 pmDEN-SAN

2h 23mnonstop

6:41 am - 10:18 amSAN-DEN

2h 37mnonstop

$98Multiple Airlines

Find Deal

sáb., oct. 25 - lun., oct. 27

7:01 am - 8:25 amDEN-SAN

2h 24mnonstop

2:24 pm - 5:57 pmSAN-DEN

2h 33mnonstop

$109Multiple Airlines

Find Deal

sáb., oct. 25 - sáb., oct. 25

3:00 pm - 4:23 pmDEN-SAN

2h 23mnonstop

8:19 pm - 11:47 pmSAN-DEN

2h 28mnonstop

$111Alaska Airlines

Find Deal

mié., oct. 22 - mié., oct. 22

7:00 am - 8:35 amDEN-SAN

2h 35mnonstop

6:30 am - 12:10 pmSAN-DEN

4h 40m1 stop

$122Southwest

Find Deal

mar., dic. 2 - mié., dic. 10

1:30 pm - 4:55 pmDEN-SAN

4h 25m1 stop

10:20 am - 3:55 pmSAN-DEN

4h 35m1 stop

$127Southwest

Find Deal

mar., nov. 4 - mié., nov. 5

7:01 am - 8:25 amDEN-SAN

2h 24mnonstop

10:32 am - 2:00 pmSAN-DEN

2h 28mnonstop

$131Alaska Airlines

Find Deal

jue., oct. 23 - jue., oct. 23

Alaska Airlines flights from Denver to San Diego

Our best Alaska Airlines deals on Denver to San Diego flight tickets

Alaska Airlines

Oct 22

DEN3:00 pmDenver Intl

2h 23m

SAN4:23 pmSan Diego

Oct 22

SAN8:19 pmSan Diego

2h 28m

DEN11:47 pmDenver Intl

$111

Find similar

Alaska Airlines

Oct 23

DEN7:01 amDenver Intl

2h 24m

SAN8:25 amSan Diego

Oct 23

SAN10:32 amSan Diego

2h 28m

DEN2:00 pmDenver Intl

$131

Find similar

Alaska Airlines

Nov 26

DEN7:20 pmDenver Intl

2h 28m

SAN8:48 pmSan Diego

Dec 1

SAN8:33 pmSan Diego

2h 26m

DEN11:59 pmDenver Intl

$141

Find similar

Southwest flights from Denver to San Diego

Our best Southwest deals on Denver to San Diego flight tickets

Southwest

Dec 2

DEN7:00 amDenver Intl

2h 35m

SAN8:35 amSan Diego

Dec 10

SAN6:30 amSan Diego

4h 40m

1 stop

DEN12:10 pmDenver Intl

$122

Find similar

Southwest

Nov 4

DEN1:30 pmDenver Intl

4h 25m

1 stop

SAN4:55 pmSan Diego

Nov 5

SAN10:20 amSan Diego

4h 35m

1 stop

DEN3:55 pmDenver Intl

$127

Find similar

Southwest

Oct 29

DEN3:00 pmDenver Intl

4h 40m

1 stop

SAN6:40 pmSan Diego

Nov 5

SAN8:40 amSan Diego

3h 55m

1 stop

DEN1:35 pmDenver Intl

$132

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

mié. 10/22

10:29 pm-11:50 pm

Nonstop2h 21m

San Diego

dom. 10/26

6:41 am-10:18 am

Nonstop2h 37m

$80

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

jue. 10/23

10:29 pm-11:50 pm

Nonstop2h 21m

San Diego

sáb. 10/25

2:24 pm-5:57 pm

Nonstop2h 33m

$81

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

vie. 10/31

10:29 pm-11:50 pm

Nonstop2h 21m

San Diego

dom. 11/2

5:41 am-9:18 am

Nonstop2h 37m

$82

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

vie. 11/7

2:34 pm-4:00 pm

Nonstop2h 26m

San Diego

jue. 11/13

6:41 am-10:18 am

Nonstop2h 37m

$83

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

sáb. 10/25

3:00 pm-4:23 pm

Nonstop2h 23m

San Diego

lun. 10/27

6:41 am-10:18 am

Nonstop2h 37m

$98

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

sáb. 10/25

7:01 am-8:25 am

Nonstop2h 24m

San Diego

sáb. 10/25

2:24 pm-5:57 pm

Nonstop2h 33m

$109

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

mié. 10/22

3:00 pm-4:23 pm

Nonstop2h 23m

San Diego

mié. 10/22

8:19 pm-11:47 pm

Nonstop2h 28m

$111

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

mar. 12/2

7:00 am-8:35 am

Nonstop2h 35m

San Diego

mié. 12/10

6:30 am-12:10 pm

1 stop4h 40m

$122

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

mar. 11/4

1:30 pm-4:55 pm

1 stop4h 25m

San Diego

mié. 11/5

10:20 am-3:55 pm

1 stop4h 35m

$127

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

jue. 10/23

7:01 am-8:25 am

Nonstop2h 24m

San Diego

jue. 10/23

10:32 am-2:00 pm

Nonstop2h 28m

$131

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Denver to San Diego

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the typical price of a round-trip flight between Denver and San Diego?

What is the cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of October, then departing from Denver during the month February is also very affordable. Most momondo users find prices during this month for around $166.

What is the cheapest day to depart on your flight to San Diego?

The cheapest day to depart from Denver to San Diego is on a Wednesday. Travelers who choose to depart for San Diego on a Wednesday will often find tickets for as low as $202. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $251. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

What is the cheapest time of day to depart on your flight to San Diego?

The cheapest time of day to fly to San Diego is in the evening when flights can be purchased for as low as $188. Flights at noon are often more expensive with an average ticket price of $300.

What is the cheapest Denver Intl to San Diego flight route?

Fly from Denver Intl to San Diego for the best Denver Intl - San Diego flight prices

How far in advance should I book a flight to San Diego?

You are more likely to see cheaper flights to San Diego from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $198 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Denver for as low as $164 on momondo.

What cabin class options are available on Denver Intl to San Diego flights?

There are 4 cabin classes available to choose from on Denver Intl to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Denver to San Diego flight prices changed over time?

As of October 2025, prices for Denver to San Diego flights are approximately 0% more expensive when compared to flights at the same time last year.

When to book flights from Denver to San Diego

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to San Diego according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Denver to San Diego (DEN to SAN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to San Diego

Best Price Found	$95
Fastest flight time	2h 21m
Direct flights	Every day
Airports in San Diego	1 airport

The best one-way flight to San Diego from Denver in the past 72 hours is $95. The best round-trip flight deal from Denver to San Diego found on momondo in the last 72 hours is $127.

The fastest flight from Denver to San Diego takes 2h 21m

Direct flights go from Denver to San Diego every day.

There is 1 airport near San Diego: San Diego (SAN)

Search flight deals

How far is Denver Intl to San Diego by plane?
Denver Intl and San Diego are 832.3 mi apart from one another. By plane, this route typically takes 2h 21m.
When did momondo last update prices for flights from Denver Intl Airport to San Diego Airport?
Prices for flights from Denver Intl Airport to San Diego Airport were last updated today.
How many operators does momondo search for flights from Denver Intl Airport to San Diego Airport?
As of October 2025, there are 5 operators available to choose from for flights from Denver Intl Airport to San Diego Airport.
How old do you have to be to fly from Denver Intl Airport to San Diego Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Denver Intl Airport to San Diego Airport.
What documentation or ID do you need to fly to San Diego Airport?
The required travel and health documents for your San Diego Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Diego Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Denver to San Diego?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Denver to San Diego is Airbus A321neo (17.33% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (16.33%), Boeing 737-800 Passenger/BBJ2 (winglets) (11.53%), and Airbus A320neo (10.46%).
What is the most popular airline from Denver to San Diego?
Based on momondo bookings for flights between Denver and San Diego, the leading airline is Frontier, making up 64% of the total bookings. Other popular airlines include United Airlines with 18%, Southwest with 14%, and Alaska Airlines with 3%.

Best airlines flying from Denver to San Diego

Compare and see reviews for airlines that fly from Denver to San Diego with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $67	Free Cancellation	Rating 5.8 3,155 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $78	Free Cancellation	Rating 7.8 2,762 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $117	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $137	Free Cancellation	Rating 8.0 4,248 reviews	Search Southwest flights
United Airlines	PriceFrom $147	Free Cancellation	Rating 7.4 8,933 reviews	Search United Airlines flights

Southwest Flights From Denver to San Diego
Southwest is one of the most popular airlines flying from Denver to San Diego, operating 33 flights/week on average for this route. A good Southwest flight deal for Denver to San Diego starts from $137 round-trip, up to an average price of $266. Our users have rated Southwest at 8.0/10.
United Airlines Flights From Denver to San Diego
Across 8,933 United Airlines reviews on momondo, the average score is 7.4/10. United Airlines flies from Denver to San Diego about 42 times each week, with ticket deals ranging from $147 to $305. Price data is based on momondo searches in the last 72 hours.

Coronado

Chula Vista

El Cajon

Julian

La Mesa

National City

Imperial Beach

Poway

Borrego Springs

San Ysidro

Lemon Grove

Alpine

Santee

Why use momondo?

Why should I use momondo to find a flight deal from Denver to San Diego?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Diego from Denver.

Can I find flights from Denver to San Diego with flexible booking policies on momondo?

Yes. All flights to San Diego from Denver on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Denver to San Diego?

Once all potential Denver to San Diego flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Denver to San Diego right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Denver to San Diego flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your San Diego trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

sáb. 11/1

sáb. 11/8

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Airports servicing California

Popular cities in the United States

Flights to New Yorkfrom $49

Flights to Los Angelesfrom $49

Flights to Miamifrom $49

Flights to Chicagofrom $49

Flights to Orlandofrom $56

Flights to Las Vegasfrom $47

Flights to San Franciscofrom $58

Flights to Washington, D.C.from $58

Flights to Bostonfrom $49

Flights to Atlantafrom $49

Flights to Dallasfrom $67

Flights to Seattlefrom $102

Cheap flights from Denver to San Diego from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to San Diego departing on 12/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Denver to San Diego

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Alaska Airlines flights from Denver to San Diego

Our best Alaska Airlines deals on Denver to San Diego flight tickets

Southwest flights from Denver to San Diego

Our best Southwest deals on Denver to San Diego flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Denver to San Diego that are best for you.

See travel insights to San Diego from

How to get the cheapest flight ticket from Denver to San Diego

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Denver and San Diego?

What is the cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of October, then departing from Denver during the month February is also very affordable. Most momondo users find prices during this month for around $166.

What is the cheapest day to depart on your flight to San Diego?

What is the cheapest time of day to depart on your flight to San Diego?

The cheapest time of day to fly to San Diego is in the evening when flights can be purchased for as low as $188. Flights at noon are often more expensive with an average ticket price of $300.

What is the cheapest Denver Intl to San Diego flight route?

Fly from Denver Intl to San Diego for the best Denver Intl - San Diego flight prices

How far in advance should I book a flight to San Diego?

What cabin class options are available on Denver Intl to San Diego flights?

There are 4 cabin classes available to choose from on Denver Intl to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Denver to San Diego flight prices changed over time?

As of October 2025, prices for Denver to San Diego flights are approximately 0% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Denver Intl to San Diego?

Frontier, Alaska Airlines, and Southwest are the most popular carriers operating from Denver Intl to San Diego

What airlines fly to San Diego?

How many flights depart from Denver to San Diego on average per day?

19 flights are operational daily from Denver to San Diego as of October 2025. The most popular departure time for this route is 3:00PM, with 35% of flights per day taking off in the afternoon.

How many flights depart from Denver to San Diego on average per week?

135 flights are operational weekly from Denver to San Diego as of October 2025. The most popular departure day for this route is Thu, with 22% of flights per week taking off on this day.

When to book flights from Denver to San Diego

Cheap Denver to San Diego (DEN to SAN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to San Diego

Best Price Found

Fastest flight time

Direct flights

Airports in San Diego

How far is Denver Intl to San Diego by plane?

When did momondo last update prices for flights from Denver Intl Airport to San Diego Airport?

How many operators does momondo search for flights from Denver Intl Airport to San Diego Airport?

How old do you have to be to fly from Denver Intl Airport to San Diego Airport?

What documentation or ID do you need to fly to San Diego Airport?

What is the most popular plane model from Denver to San Diego?

What is the most popular airline from Denver to San Diego?

Best airlines flying from Denver to San Diego

Compare and see reviews for airlines that fly from Denver to San Diego with momondo

Southwest Flights From Denver to San Diego

United Airlines Flights From Denver to San Diego

Traveling to a place near San Diego?

Why use momondo?

Why should I use momondo to find a flight deal from Denver to San Diego?

Can I find flights from Denver to San Diego with flexible booking policies on momondo?

How can momondo help me find flights from Denver to San Diego?

I’m not ready to book a flight from Denver to San Diego right now. Can momondo alert me if prices change?

An easier way to manage your San Diego trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California