Denver (DEN) to San Diego (SAN) flights
4 airlines fly nonstop from Denver (DEN) to San Diego (SAN): Alaska Airlines, Frontier Airlines, Southwest Airlines and United Airlines. The two airports are 852 miles (1,371 km) apart. Alaska Airlines is in oneworld and United Airlines is in Star Alliance. There are also 29 ways to fly it with one stop, through Vail, Las Vegas and Colorado Springs and more.
Airlines flying nonstop from DEN to SAN
- Alaska Airlinesoneworld · bookable with 9 programsWho books it
- Frontier AirlinesNot in an allianceWho books it
- Southwest AirlinesNot in an allianceWho books it
- United AirlinesStar Alliance · bookable with 13 programsWho books it
Book DEN to SAN with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Air Canada AeroplanBooks United Airlines
- Air New Zealand AirpointsBooks United Airlines
- Alaska Atmos RewardsBooks Alaska Airlines
- American AAdvantageBooks Alaska Airlines
- ANA Mileage ClubBooks United Airlines
- Avianca LifeMilesBooks United Airlines
- British Airways ClubBooks Alaska Airlines
- Cathay Pacific Asia MilesBooks Alaska Airlines
- Emirates SkywardsBooks United Airlines
- EVA Air Infinity MileageLandsBooks United Airlines
- Finnair PlusBooks Alaska Airlines
- Iberia ClubBooks Alaska Airlines
- JAL Mileage BankBooks Alaska Airlines
- JetBlue TrueBlueBooks United Airlines
- Lufthansa Miles & MoreBooks United Airlines
- Qantas Frequent FlyerBooks Alaska Airlines
- Qatar Airways Privilege ClubBooks Alaska Airlines
- Singapore Airlines KrisFlyerBooks United Airlines
- TAP Miles&GoBooks United Airlines
- Thai Royal Orchid PlusBooks United Airlines
- Turkish Airlines Miles&SmilesBooks United Airlines
- United MileagePlusBooks United Airlines
DEN to SAN with one stop
29 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Vail (EGE)United Airlines, then Alaska Airlines
- Via Las Vegas (LAS)Frontier Airlines and Southwest Airlines the whole way
+1 - Via Colorado Springs (COS)Southwest Airlines the whole way
- Via Phoenix (PHX)American Airlines, Frontier Airlines and 1 more the whole way
+1+1 - Via Hayden (HDN)United Airlines and Southwest Airlines, then Alaska Airlines
- Via Los Angeles (LAX)Delta Air Lines and United Airlines the whole way+2
- Via Albuquerque (ABQ)Southwest Airlines the whole way
- Via Tucson (TUS)Southwest Airlines the whole way
- Via Salt Lake City (SLC)Delta Air Lines and Southwest Airlines the whole way+1
- Via Santa Barbara (SBA)Southwest Airlines the whole way
- Via Fresno (FAT)Southwest Airlines the whole way
- Via San Luis Obispo (SBP)United Airlines, then Alaska Airlines
- Via El Paso (ELP)Southwest Airlines the whole way
- Via Jackson (JAC)United Airlines, then Alaska Airlines
- Via Reno (RNO)Southwest Airlines the whole way
DEN to SAN: common questions
Which airlines fly nonstop from DEN to SAN?
Alaska Airlines (oneworld), Frontier Airlines, Southwest Airlines and United Airlines (Star Alliance) fly nonstop from Denver (DEN) to San Diego (SAN).
How far is Denver from San Diego by plane?
Denver (DEN) and San Diego (SAN) are 852 miles (1,371 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book DEN to SAN award flights?
22 programs can book at least one of the nonstop airlines: Air Canada Aeroplan, Air New Zealand Airpoints, Alaska Atmos Rewards, American AAdvantage, ANA Mileage Club, Avianca LifeMiles, British Airways Club, Cathay Pacific Asia Miles and 14 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does DEN to SAN cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for DEN to SAN with taxes and fees.
Where can I connect between Denver and San Diego?
The most direct connections are through Vail (EGE), Las Vegas (LAS), Colorado Springs (COS), Phoenix (PHX) and Hayden (HDN). On 19 of them the same airline flies both flights, for example Frontier Airlines through Las Vegas.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.