Question 1

What airlines fly to San Diego?

Accepted Answer

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 57% 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.

Question 2

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

Accepted Answer

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 $301.

Question 3

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

Accepted Answer

As of December 2025, prices for Denver to San Diego flights are approximately 95% more expensive when compared to flights at the same time last year.

Question 4

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

Accepted Answer

26 flights are operational daily from Denver to San Diego as of December 2025. The most popular departure time for this route is 7:00PM, with 38% of flights per day taking off at noon.

Question 5

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

Accepted Answer

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.

Question 6

Which airline has the best punctuality record on Denver to San Diego flights?

Accepted Answer

According to our data, Alaska Airlines have had the least number of delays on this route over the last 12 months; with about 12% of their flights experiencing any sort of delay.

Question 7

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

Accepted Answer

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 $194 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 $149 on momondo.

Question 8

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

Accepted Answer

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

Question 9

How often are flights from Denver to San Diego delayed?

Accepted Answer

Historically, on average around 20% of flights between Denver and San Diego have experienced a delay on any given week. The average delay length over the past 12 months has been 128 minutes.

Question 10

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

Accepted Answer

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 $244. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

Question 11

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Question 12

What is the cheapest month to fly to San Diego?

Accepted Answer

If you are unable to visit San Diego during the month of January, then departing from Denver during the month October is also very affordable. Most momondo users find prices during this month for around $157.

Question 13

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

Accepted Answer

Alaska Airlines and United Airlines are the most popular carriers operating from Denver Intl to San Diego

Question 14

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

Accepted Answer

184 flights are operational weekly from Denver to San Diego as of December 2025. The most popular departure day for this route is Thu, with 18% of flights per week taking off on this day.

Question 15

What is the most punctual flight time for Denver to San Diego flights?

Accepted Answer

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Question 16

Which airlines fly direct from Denver to San Diego?

Accepted Answer

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.

Question 17

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

Accepted Answer

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

Question 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

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.

Question 20

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

Accepted Answer

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.

Best Price Found	$77
Fastest flight time	2h 17m
Direct flights	Every day
Airports in San Diego	1 airport

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $58	Free Cancellation	Rating 5.8 3,090 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $78	Free Cancellation	Rating 7.8 2,817 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $117	Free Cancellation	Rating 8.0 11,402 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $117	Free Cancellation	Rating 8.0 4,250 reviews	Search Southwest flights
United Airlines	PriceFrom $127	Free Cancellation	Rating 7.4 9,064 reviews	Search United Airlines flights

Cheap flights from Denver to San Diego from $48

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 2/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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What is the cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of January, then departing from Denver during the month October is also very affordable. Most momondo users find prices during this month for around $157.

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 $186. Flights at noon are often more expensive with an average ticket price of $301.

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 December 2025, prices for Denver to San Diego flights are approximately 95% 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?

Alaska Airlines and United Airlines are the most popular carriers operating from Denver Intl to San Diego

What airlines fly to San Diego?

How often are flights from Denver to San Diego delayed?

Historically, on average around 20% of flights between Denver and San Diego have experienced a delay on any given week. The average delay length over the past 12 months has been 128 minutes.

What is the most punctual flight time for Denver to San Diego flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Denver to San Diego flights?

According to our data, Alaska Airlines have had the least number of delays on this route over the last 12 months; with about 12% of their flights experiencing any sort of delay.

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

26 flights are operational daily from Denver to San Diego as of December 2025. The most popular departure time for this route is 7:00PM, with 38% of flights per day taking off at noon.

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

184 flights are operational weekly from Denver to San Diego as of December 2025. The most popular departure day for this route is Thu, with 18% 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

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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?

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

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