Cheap flights from San Diego to Denver

Flights overview

Useful information for finding cheap flights from San Diego to Denver and booking your next trip
Cheapest round-trip flights $56
Frontier Nonstop 3 hr Thu, Mar 5 — Sun, Mar 8
The cheapest round-trip flight from San Diego to Denver is currently $56
Cheapest one-way flight $28
Frontier Nonstop 3 hr Wed, Feb 25
The cheapest one-way flight from San Diego to Denver is currently $28
Last-minute weekend getaway $148
Frontier Nonstop 3 hr Fri, Jan 30 — Sun, Feb 1
The cheapest last-minute weekend getaway from San Diego to Denver is currently $148
Cheapest business class flights $357
Alaska Nonstop 3 hr Thu, Mar 5 — Sun, Mar 8
The cheapest business class round-trip flight from San Diego to Denver is currently $357
Fastest flight 2 hr 20 min The fastest nonstop flight from San Diego to Denver takes 2 hr 20 min
Nonstop flights Every day There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from San Diego to Denver is typically February. The most expensive month to fly is typically July.
February
Cheapest
Typical prices: $35–145
July
Most expensive
Typical prices: $160–230

Popular airlines from San Diego to Denver

  • Southwest
    Nonstop
    from $117
    Typical price: $135–340
    41 weekly nonstop flights
    SAN - DEN Every day
    650 weekly connecting flights
    SAN - DEN Every day
  • United
    Nonstop
    from $117
    Typical price: $140–350
    39 weekly nonstop flights
    SAN - DEN Every day
    273 weekly connecting flights
    SAN - DEN Every day
  • Alaska
    Nonstop
    from $117
    Typical price: $135–550
    18 weekly nonstop flights
    SAN - DEN Every day
    19 weekly connecting flights
    SAN - DEN Every day
  • Frontier
    Nonstop
    from $56
    Typical price: $75–200
    11 weekly nonstop flights
    SAN - DEN Every day
    24 weekly connecting flights
    SAN - DEN Every Mon, Thu, Fri, Sat, Sun
  • American
    from $159
    Typical price: $205–440
    178 weekly connecting flights
    SAN - DEN Every day
  • Delta
    from $197
    Typical price: $215–455
    70 weekly connecting flights
    SAN - DEN Every day

Popular airports near San Diego

  • San Diego International Airport (SAN)
    San Diego United States 10 min 2 mi
  • Tijuana International Airport (TIJ)
    Tijuana Mexico 37 min 16 mi
  • Los Angeles International Airport (LAX)
    Los Angeles United States 2 hr 2 min 111 mi
  • John Wayne Airport (SNA)
    Santa Ana United States 1 hr 21 min 78 mi

Popular airports near Denver

  • Denver International Airport (DEN)
    Denver United States 38 min 19 mi
  • Colorado Springs Airport (COS)
    Colorado Springs United States 1 hr 26 min 66 mi
  • Centennial Airport (APA)
    Denver United States 27 min 14 mi
  • Eagle County Regional Airport (EGE)
    Vail United States 2 hr 18 min 103 mi

Frequently asked questions about flying from San Diego to Denver

The cheapest flights from San Diego to Denver are usually in February. Typical ticket prices in February range from $35 to $145.
The cheapest round-trip flight from San Diego to Denver recently found on Google Flights was with Frontier from $56. The cheapest one-way flight was with Frontier from $28.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from San Diego to Denver is $117, flying from Feb 19 to Feb 22.
  • The cheapest United flight from San Diego to Denver is $117, flying from Mar 5 to Mar 8.
  • The cheapest Alaska flight from San Diego to Denver is $117, flying from Mar 5 to Mar 8.
  • The cheapest Frontier flight from San Diego to Denver is $56, flying from Mar 5 to Mar 8.
  • The cheapest American flight from San Diego to Denver is $159, flying from Feb 28 to Mar 2.
  • The cheapest Delta flight from San Diego to Denver is $197, flying from Apr 16 to Apr 19.
The cheapest round-trip flight from San Diego to Denver starts at $56 from Thu, Mar 5 to Sun, Mar 8. The cheapest one-way flight starts at $28 and departs on Wed, Feb 25.
2 hr 20 min is the shortest flight time from San Diego to Denver.
Denver’s mild summer months (Jun–Aug) are a popular time for visitors exploring the city and nearby national parks. The ski season runs through winter (Nov–Mar). Major events include the National Western Stock Show & Rodeo (Jan) and A Taste of Colorado (Sep) food and arts festival.
It's easy to use Google Flights to find the cheapest days to fly from San Diego to Denver.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.
What counts as the best airline for your flights from San Diego to Denver really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from San Diego to Denver.

In terms of nonstop flights, Southwest is the most popular. Southwest offers 41 nonstop flights and 650 connecting flights per week. Southwest flies from San Diego International Airport (SAN) to Denver International Airport (DEN) .

Other popular airlines flying from San Diego to Denver are:
  • United offers 39 nonstop flights and 273 connecting flights per week. United flies from San Diego International Airport (SAN) to Denver International Airport (DEN) .
  • Alaska offers 18 nonstop flights and 19 connecting flights per week. Alaska flies from San Diego International Airport (SAN) to Denver International Airport (DEN) .
  • Frontier offers 11 nonstop flights and 24 connecting flights per week. Frontier flies from San Diego International Airport (SAN) to Denver International Airport (DEN) .
  • American offers 178 connecting flights per week. American flies from San Diego International Airport (SAN) to Denver International Airport (DEN) .
  • Delta offers 70 connecting flights per week. Delta flies from San Diego International Airport (SAN) to Denver International Airport (DEN) .
The number of connecting flights refers to distinct flights with at least one stop between San Diego and Denver.
The cheapest round-trip flight from San Diego to Denver recently found on Google Flights was with Frontier from $56. The cheapest one-way flight was with Frontier from $28.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from San Diego to Denver is $117, flying from Feb 19 to Feb 22.
  • The cheapest United flight from San Diego to Denver is $117, flying from Mar 5 to Mar 8.
  • The cheapest Alaska flight from San Diego to Denver is $117, flying from Mar 5 to Mar 8.
  • The cheapest Frontier flight from San Diego to Denver is $56, flying from Mar 5 to Mar 8.
  • The cheapest American flight from San Diego to Denver is $159, flying from Feb 28 to Mar 2.
  • The cheapest Delta flight from San Diego to Denver is $197, flying from Apr 16 to Apr 19.
Southwest, United, Alaska and Frontier fly direct from San Diego to Denver.
  • There are 41 Southwest direct flights from San Diego to Denver per week. Flights are available every day.
  • There are 39 United direct flights from San Diego to Denver per week. Flights are available every day.
  • There are 18 Alaska direct flights from San Diego to Denver per week. Flights are available every day.
  • There are 11 Frontier direct flights from San Diego to Denver per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
The cheapest last-minute deal between San Diego and Denver at price $148 is offered by Frontier from Fri, Jan 30 to Sun, Feb 1.
Southwest, United, Alaska and Frontier fly direct from San Diego to Denver.
  • There are 41 Southwest direct flights from San Diego to Denver per week. Flights are available every day.
  • There are 39 United direct flights from San Diego to Denver per week. Flights are available every day.
  • There are 18 Alaska direct flights from San Diego to Denver per week. Flights are available every day.
  • There are 11 Frontier direct flights from San Diego to Denver per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
There are direct flights from San Diego to Denver on a daily basis.
The cheapest direct (nonstop) round-trip flights between San Diego and Denver start at $56 from Thu, Mar 5 to Sun, Mar 8 with Frontier.
It's easy to find nonstop flights with Google Flights! Once you've searched for flights from San Diego to Denver, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.
The cheapest business class round-trip flights between San Diego and Denver start at $357 from Thu, Mar 5 to Sun, Mar 8 with Alaska.
The cheapest economy class round-trip flights between San Diego and Denver start at $56 from Thu, Mar 5 to Sun, Mar 8.
To book business class trips from San Diego to Denver, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.
The best last-minute getaway deal for the next weekend between San Diego and Denver starts at $148 from Fri, Jan 30 to Sun, Feb 1 with Frontier.
The cheapest last-minute deal between San Diego and Denver at price $148 is offered by Frontier from Fri, Jan 30 to Sun, Feb 1.
To find last-minute flight deals from San Diego to Denver, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.

Search more flights

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