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Cheap flights from Denver to San Diego from $78

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 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Frontier Logo
10:29 pm - 11:50 pmDEN-SAN
2h 21mnonstop
Frontier Logo
9:03 pm - 12:46 amSAN-DEN
2h 43mnonstop
$111Frontier
Find Deal
Thu, Oct 9 - Sun, Oct 12
Frontier Logo
10:29 pm - 11:52 pmDEN-SAN
2h 23mnonstop
Frontier Logo
10:17 am - 1:56 pmSAN-DEN
2h 39mnonstop
$120Frontier
Find Deal
Fri, Aug 22 - Sun, Aug 24
Alaska Airlines Logo
8:20 am - 9:45 amDEN-SAN
2h 25mnonstop
Alaska Airlines Logo
3:45 pm - 7:03 pmSAN-DEN
2h 18mnonstop
$157Alaska Airlines
Find Deal
Sat, Nov 8 - Sat, Nov 8
United Airlines Logo
1:40 pm - 3:01 pmDEN-SAN
2h 21mnonstop
United Airlines Logo
6:00 pm - 12:29 amSAN-DEN
5h 29m1 stop
$163United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
Southwest Logo
10:35 am - 2:00 pmDEN-SAN
4h 25m1 stop
Southwest Logo
6:45 am - 10:10 amSAN-DEN
2h 25mnonstop
$167Southwest
Find Deal
Tue, Aug 12 - Sat, Aug 16
United Airlines Logo
8:50 pm - 10:15 pmDEN-SAN
2h 25mnonstop
United Airlines Logo
6:00 pm - 12:29 amSAN-DEN
5h 29m1 stop
$183United Airlines
Find Deal
Thu, Sep 25 - Sat, Sep 27
Southwest Logo
7:00 am - 10:40 amDEN-SAN
4h 40m1 stop
Southwest Logo
7:55 pm - 11:20 pmSAN-DEN
2h 25mnonstop
$187Southwest
Find Deal
Wed, Sep 17 - Sun, Sep 21
Delta Logo
12:50 pm - 3:54 pmDEN-SAN
4h 04m1 stop
Delta Logo
1:30 pm - 7:55 pmSAN-DEN
5h 25m1 stop
$217Delta
Find Deal
Wed, Jul 30 - Wed, Aug 6
Delta Logo
6:25 pm - 11:42 pmDEN-SAN
6h 17m1 stop
Delta Logo
6:15 am - 11:51 amSAN-DEN
4h 36m1 stop
$222Delta
Find Deal
Wed, Aug 13 - Sun, Aug 17
Alaska Airlines Logo
6:17 pm - 11:59 pmDEN-SAN
6h 42m1 stop
Alaska Airlines Logo
7:45 pm - 10:40 amSAN-DEN
13h 55m2 stops
$295Alaska Airlines
Find Deal
Fri, Sep 12 - Sat, Sep 13

Frontier flights from Denver to San Diego

Our best Frontier deals on Denver to San Diego flight tickets
Frontier
Oct 9
DEN10:29 pmDenver Intl
2h 21m
SAN11:50 pmSan Diego
Oct 12
SAN9:03 pmSan Diego
2h 43m
DEN12:46 amDenver Intl
Frontier
Aug 22
DEN10:29 pmDenver Intl
2h 23m
SAN11:52 pmSan Diego
Aug 24
SAN10:17 amSan Diego
2h 39m
DEN1:56 pmDenver Intl
Frontier
Aug 22
DEN10:29 pmDenver Intl
2h 23m
SAN11:52 pmSan Diego
Aug 25
SAN9:11 pmSan Diego
2h 35m
DEN12:46 amDenver Intl

Alaska Airlines flights from Denver to San Diego

Our best Alaska Airlines deals on Denver to San Diego flight tickets
Alaska Airlines
Nov 8
DEN8:20 amDenver Intl
2h 25m
SAN9:45 amSan Diego
Nov 8
SAN3:45 pmSan Diego
2h 18m
DEN7:03 pmDenver Intl
Alaska Airlines
Sep 12
DEN6:17 pmDenver Intl
6h 42m
1 stop
SAN11:59 pmSan Diego
Sep 13
SAN7:45 pmSan Diego
13h 55m
2 stops
DEN10:40 amDenver Intl
Alaska Airlines
Dec 11
DEN6:59 pmDenver Intl
6h 00m
1 stop
SAN11:59 pmSan Diego
Dec 15
SAN10:45 amSan Diego
6h 18m
1 stop
DEN6:03 pmDenver Intl

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 cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of September, then departing from Denver during the month October is also very affordable. Most momondo users find prices during this month for around $167.

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 Tuesday. Travelers who choose to depart for San Diego on a Tuesday will often find tickets for as low as $176. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $245. 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 $186. Flights at noon are often more expensive with an average ticket price of $303.

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 4 weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $191 when searching 4 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 $151 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 June 2025, prices for Denver to San Diego flights are approximately 34% cheaper 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

$78

Fastest flight time

2h 20m

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 $78. The best round-trip flight deal from Denver to San Diego found on momondo in the last 72 hours is $111.
The fastest flight from Denver to San Diego takes 2h 20m
Direct flights go from Denver to San Diego every day.
There is 1 airport near San Diego: San Diego (SAN)

  • 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 20m.

  • 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?

  • 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?

  • 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
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $58Free CancellationRating
5.9
3,296 reviews
Search Frontier flights
United AirlinesPriceFrom $157Free CancellationRating
7.4
8,801 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $175Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $177Free CancellationRating
8.0
4,278 reviews
Search Southwest flights
DeltaPriceFrom $194Free CancellationRating
8.0
7,963 reviews
Search Delta flights
  • Southwest Flights From Denver to San Diego

    Southwest is one of the most popular airlines flying from Denver to San Diego, operating 69 flights/week on average for this route. A good Southwest flight deal for Denver to San Diego starts from $177 round-trip, up to an average price of $271. Our users have rated Southwest at 8.0/10.

  • United Airlines Flights From Denver to San Diego

    Across 8,801 United Airlines reviews on momondo, the average score is 7.4/10. United Airlines flies from Denver to San Diego about 46 times each week, with ticket deals ranging from $157 to $306. Price data is based on momondo searches in the last 72 hours.


Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Coronado
Chula Vista
El Cajon
Julian
National City
La Mesa
Imperial Beach
San Ysidro
Poway
Borrego Springs
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.


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1 adult
Sat 6/21
Sat 6/28

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