Denver, CO to San Diego, CA flights from $44

Flights starting at $44. Choose between Linear Air, United Airlines, or Frontier Airlines to find the best price.

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Denver DENLas Vegas LASSan Diego SAN

Frontier Airlines

$68

Updated:

Round trips

Denver DENSan Diego SAN

Frontier Airlines

$173

Updated:

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Travelers usually depart from Denver International, Denver Union Station, Centennial Airport, or Rocky Mountain Metropolitan Airport when they travel from Denver to San Diego. Book your trip to arrive at San Diego International, San Diego, CA Bus Station, San Diego, CA - Old Town, McClellan–Palomar, or San Diego, CA - La Jolla. The distance between Denver and San Diego is 1372 km. The most popular airlines for this route are Linear Air, United Airlines, Frontier Airlines, Spirit Airlines, and Delta Air Lines. Denver and San Diego have 401 direct flights per week.

Weekly direct flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Direct flights7784798
Fly direct with

Frontier Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

United Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

Check-in for a flight from Denver to San Diego

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Linear Air O2YesNo
United AirlinesUALUAYesNo
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Delta Air LinesDALDLYesOpens 24 days before flight
Closes 1 hours before flight

United States COVID-19 travel restrictions

Latest COVID-19 travel restrictions in United States – 11/2022
Your trip summary

Most travelers from Denver, DEN can enter San Diego, SAN.

Departure

Travel restrictions
  • Travel is allowed
  • Proof of a negative pre-departure COVID-19 test result is not required
  • Quarantine is not required

Information is provided as guidance only and accurate at the time of publishing. Always check government websites and airline materials before booking and traveling.

Learn more about COVID-19 restrictions in United States in our dedicated Stories article.

Frequently asked questions

How long does it take to travel from Denver to San Diego?
A one-way nonstop (direct) flight between Denver and San Diego takes around 2.4 hours.
What is the flight distance between Denver and San Diego?
The flight distance between Denver and San Diego is 1372 km.
What airlines offer nonstop (direct) flights between Denver and San Diego?
Several carriers operate flights between Denver and San Diego. Airlines offering nonstop (direct) flights include Frontier Airlines, United Airlines.
What are the most popular routes to and from Denver?
Travelers frequently search for route combinations, such as Denver and Las Vegas, Los Angeles, Chicago, Minneapolis, Dallas, Washington, D.C., Orlando, Phoenix, San Francisco, Houston, Austin, Atlanta, Paris, Philadelphia, New York, Miami, London, Seattle, Tampa, Detroit.
What are the most popular routes to and from San Diego?
Travelers frequently search for route combinations, such as San Diego and Las Vegas, Austin, Cincinnati, Philadelphia, New York, Phoenix, Charlotte, Washington, D.C., Atlanta, Raleigh, Chicago, Orlando, San Antonio, Detroit, Dallas, St. Louis, Cleveland, Salt Lake City, Minneapolis, London.
Which airports are there in Denver?
Denver is mainly served by Denver International. But there are other airports nearby, including Rocky Mountain Metropolitan Airport, Centennial Airport.
What airports are near Denver?
The main airport in Denver is Denver International. It is also served by Colorado Springs, Cheyenne Regional, Laramie Regional, Eagle County Regional, Pueblo Memorial.
What airports are near San Diego?
The main airport in San Diego is San Diego International. It is also served by Tijuana International, Ontario International, John Wayne, Hollywood Burbank, Mexicali International, Palm Springs International, Imperial County, Long Beach, Hawthorne Municipal, Yuma International.
What buses and trains depart from Denver?
A number of bus and train companies depart from Denver, including Amtrak train, Greyhound.
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Denver and San Diego?
What is Virtual Interlining and how do I use it?
Which airlines fly between Denver and San Diego?
When's the best time to travel between Denver and San Diego?
What flights operate between Denver and San Diego?
How many airports are there near Denver?
How many airports are there near San Diego?
Is it possible to reach Denver by bus or train?
What time do nonstop (direct) flights between Denver and San Diego depart?
What time do nonstop (direct) flights between Denver and San Diego arrive?
What time do flights between Denver and San Diego depart?
What time do flights between Denver and San Diego arrive?

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.

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