San Diego (SAN) to Denver (DEN) flights
4 airlines fly nonstop from San Diego (SAN) to Denver (DEN): 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 SAN to DEN
- 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 SAN to DEN 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
SAN to DEN with one stop
29 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Vail (EGE)Alaska Airlines, then United Airlines
- Via Las Vegas (LAS)Southwest Airlines and Frontier Airlines the whole way
+1 - Via Colorado Springs (COS)Southwest Airlines the whole way
- Via Phoenix (PHX)American Airlines, Southwest Airlines and 1 more the whole way
+1+1 - Via Hayden (HDN)Alaska Airlines, then United Airlines and Southwest 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)Alaska Airlines, then United Airlines
- Via El Paso (ELP)Southwest Airlines the whole way
- Via Jackson (JAC)Alaska Airlines, then United Airlines
- Via Reno (RNO)Southwest Airlines the whole way
SAN to DEN: common questions
Which airlines fly nonstop from SAN to DEN?
Alaska Airlines (oneworld), Frontier Airlines, Southwest Airlines and United Airlines (Star Alliance) fly nonstop from San Diego (SAN) to Denver (DEN).
How far is San Diego from Denver by plane?
San Diego (SAN) and Denver (DEN) 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 SAN to DEN 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 SAN to DEN cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for SAN to DEN with taxes and fees.
Where can I connect between San Diego and Denver?
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 Southwest 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.