Cheap flights from Denver to San Diego from $63
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 5/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Denver to San Diego
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Frontier flights from Denver to San Diego
Our best Frontier deals on Denver to San Diego flight tickets
American Airlines flights from Denver to San Diego
Our best American Airlines deals on Denver to San Diego flight tickets
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 May, then departing from Denver during the month June is also very affordable. Most momondo users find prices during this month for around $143.
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 Saturday. Travelers who choose to depart for San Diego on a Saturday will often find tickets for as low as $149. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $236. 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 afternoon when flights can be purchased for as low as $162. 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?
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 $177 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 $137 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.
What is the cheapest airline that flies from Denver Intl to San Diego?
Frontier, American Airlines, and Alaska Airlines are the most popular carriers operating from Denver Intl to San Diego
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 63% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 6 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 day?
20 flights are operational daily from Denver to San Diego as of April 2025. The most popular departure time for this route is 3:00PM, with 34% of flights per day taking off at noon.
How many flights depart from Denver to San Diego on average per week?
146 flights are operational weekly from Denver to San Diego as of April 2025. The most popular departure day for this route is Wed, 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
Find info about flight duration, direct flights, and airports for your flight from Denver to San Diego
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?
As of April 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 Boeing 737 MAX 8 (17.88% of total bookings). The next most popular plane models are Airbus A321neo (14.96%), Boeing 737-700 Passenger/BBJ1 (winglets) (12.14%), and Boeing 737-800 (11.73%).
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 72% of the total bookings. Other popular airlines include United Airlines with 21%, Southwest with 7%, and Delta with 0%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $57 | Free Cancellation | Rating 6.0 3,279 reviews | |||
| PriceFrom $155 | Free Cancellation | Rating 7.4 8,636 reviews | |||
| PriceFrom $175 | Free Cancellation | Rating 8.0 4,279 reviews | |||
| PriceFrom $194 | Free Cancellation | Rating 8.0 7,911 reviews | |||
| PriceFrom $197 | Free Cancellation | Rating 7.2 10,000 reviews |
Southwest Flights From Denver to San Diego
Southwest is one of the most popular airlines flying from Denver to San Diego, operating 37 flights/week on average for this route. A good Southwest flight deal for Denver to San Diego starts from $175 round-trip, up to an average price of $274. Our users have rated Southwest at 8.0/10.
United Airlines Flights From Denver to San Diego
Across 8,636 United Airlines reviews on momondo, the average score is 7.4/10. United Airlines flies from Denver to San Diego about 43 times each week, with ticket deals ranging from $155 to $304. 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 locationsWhy 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.