A large bridge spanning a body of water with a city skyline in the background.

Cheap Flights from Denver (DEN) to San Diego (SAN)

View AU$135 flight on Thu, 12 Nov 2026Opens in a new window

Popular airlines from Denver International Airport (DEN) to San Diego Intl. Airport (SAN)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 35% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Denver (DEN) to San Diego (SAN)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, 3 Nov - Fri, 6 Nov
DEN
Denver
SAN
San Diego
AU$294 Return, found 3 days ago
AU$294
Return
found 3 days ago
Select Alaska Airlines flight, departing Tue, 3 Nov from Denver to San Diego, returning Fri, 6 Nov, priced at AU$294 found 3 days ago
Delta
Tue, 3 Nov - Fri, 6 Nov
DEN
Denver
SAN
San Diego
AU$309 Return, found 3 days ago
AU$309
Return
found 3 days ago
Select Delta flight, departing Tue, 3 Nov from Denver to San Diego, returning Fri, 6 Nov, priced at AU$309 found 3 days ago
Alaska Airlines
Tue, 3 Nov - Fri, 6 Nov
DEN
Denver
SAN
San Diego
AU$352 Return, found 3 days ago
AU$352
Return
found 3 days ago
Select Alaska Airlines flight, departing Tue, 3 Nov from Denver to San Diego, returning Fri, 6 Nov, priced at AU$352 found 3 days ago
Delta
Tue, 3 Nov - Fri, 6 Nov
DEN
Denver
SAN
San Diego
AU$366 Return, found 3 days ago
AU$366
Return
found 3 days ago
Select Delta flight, departing Tue, 3 Nov from Denver to San Diego, returning Fri, 6 Nov, priced at AU$366 found 3 days ago
Delta
Tue, 3 Nov - Fri, 6 Nov
DEN
Denver
SAN
San Diego
AU$380 Return, found 3 days ago
AU$380
Return
found 3 days ago
Select Delta flight, departing Tue, 3 Nov from Denver to San Diego, returning Fri, 6 Nov, priced at AU$380 found 3 days ago
American Airlines
Tue, 3 Nov - Fri, 6 Nov
DEN
Denver
SAN
San Diego
AU$397 Return, found 3 days ago
AU$397
Return
found 3 days ago
Select American Airlines flight, departing Tue, 3 Nov from Denver to San Diego, returning Fri, 6 Nov, priced at AU$397 found 3 days ago

Find the cheapest month to fly from Denver (DEN) to San Diego (SAN)

September is typically the cheapest month to fly

From AU$94 - AU$150 per traveller.

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) cost?
You can find one-way and return flights from DEN to SAN with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when DEN to SAN ticket fares go up or down.
What is the cheapest month to fly from Denver, CO (DEN) to San Diego, CA (SAN)?
The cheapest months to fly from Denver, CO (DEN) to San Diego, CA (SAN) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.)?
You have 3 airlines offering direct flights from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.). Here are the carriers:
  • Southwest Airlines operates 47 direct flights from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) every week.
  • United operates 43 direct flights from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) every week.
  • Frontier Airlines operates 15 direct flights from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) every week.
How do I find cheap flights from Denver, CO (DEN) to San Diego, CA (SAN)?
To find a cheap flight from Denver, CO (DEN) to San Diego, CA (SAN), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The best airline to fly with from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Denver, CO (DEN) to San Diego, CA (SAN)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.)?
You'll find approximately 15 nonstop flights per day from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.). For even more choices, look at flights that include layovers, as there are around 193 connecting flights per day. Some common connection points include Sky Harbor Intl. (PHX), Harry Reid International Airport (LAS), and Dallas-Fort Worth Intl. (DFW).
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The earliest flight from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) typically departs around 12:15 AM. This service is operated by American Airlines. This is a seasonal service, active only in November. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.)?
You'll find the most flights from Denver International Airport (DEN) to San Diego International Airport (SAN) on a Thursday, with around 129 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Southwest Airlines, United, and Alaska Airlines. Thursdays typically have notably more flight options compared to other days of the week, offering you greater flexibility.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.)?
The most popular departure times for flights from Denver Intl. (DEN) to San Diego Intl. (SAN) are in the early morning, from 6am to 9am. Many major carriers, including Southwest Airlines, Frontier Airlines and Alaska Airlines, offer flights during this window. Many travellers prefer this because it allows for an early arrival in San Diego, giving you more time to enjoy your day.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.)?
A non-stop flight from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) typically takes around 2 hours 30 minutes. This route covers a distance of approximately 1,371 kilometers. If you opt for a flight with one stop, your travel time will be longer, usually around 6 hours. Flights with two or more stops will take even longer, typically around 8 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.)?
You can fly business class or first class between DEN and SAN. You can fly business class with Frontier Airlines and Delta.First class cabins are available on Alaska Airlines, Delta, United, and American Airlines.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Diego, CA (SAN) from Denver, CO (DEN)?
If you're planning to travel to San Diego from Denver Intl. (DEN), you can fly directly into San Diego Intl. (SAN). Some flights may connect through major hubs like Albuquerque Intl. Sunport (ABQ), Seattle - Tacoma Intl. (SEA), or Tucson Intl. (TUS) before reaching San Diego. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to San Diego, CA (SAN-San Diego Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN) to San Diego, CA (SAN)?
If you booked your Denver, CO (DEN) to San Diego, CA (SAN) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Denver Intl.
Destination airport
San Diego Intl.
Roundtrip price
AU$293
Distance
1363 km
Average flight time
1 hour 20 mins

Book with confidence

Your quick guide to flights from Denver to San Diego

Pick up great flights from Denver to San Diego

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Denver to San Diego. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Denver to San Diego that take around hours.

Find cheap flights from Denver to San Diego

From the great flight deals with prices currently ranging from AU$294 to AU$397, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Denver to San Diego around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to San Diego is normally in November.

Reasons to book your flight from Denver to San Diego with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Denver to San Diego across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to San Diego right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from Denver to San Diego

Explore a world of travel with Expedia

*Available to Expedia members.