Tucson (TUS) to Denver (DEN) flights
2 airlines fly nonstop from Tucson (TUS) to Denver (DEN): Southwest Airlines and United Airlines. The two airports are 638 miles (1,027 km) apart. United Airlines is in Star Alliance. There are also 8 ways to fly it with one stop, through Phoenix, Salt Lake City and Las Vegas and more.
Airlines flying nonstop from TUS to DEN
- Southwest AirlinesNot in an allianceWho books it
- United AirlinesStar Alliance · bookable with 13 programsWho books it
Book TUS 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
- ANA Mileage ClubBooks United Airlines
- Avianca LifeMilesBooks United Airlines
- Emirates SkywardsBooks United Airlines
- EVA Air Infinity MileageLandsBooks United Airlines
- JetBlue TrueBlueBooks United Airlines
- Lufthansa Miles & MoreBooks United 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
TUS to DEN with one stop
8 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Phoenix (PHX)American Airlines and Southwest Airlines the whole way
+1 - Via Salt Lake City (SLC)Delta Air Lines the whole way
+1 - Via Las Vegas (LAS)Southwest Airlines the whole way
- Via San Diego (SAN)Southwest Airlines the whole way+1
- Via Santa Ana (SNA)Alaska Airlines, then Frontier Airlines, United Airlines and 1 more
- Via Los Angeles (LAX)American Airlines, Delta Air Lines and 1 more the whole way+2
- Via Dallas (DFW)American Airlines the whole way
- Via Dallas (DAL)Southwest Airlines the whole way
TUS to DEN: common questions
Which airlines fly nonstop from TUS to DEN?
Southwest Airlines and United Airlines (Star Alliance) fly nonstop from Tucson (TUS) to Denver (DEN).
How far is Tucson from Denver by plane?
Tucson (TUS) and Denver (DEN) are 638 miles (1,027 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book TUS to DEN award flights?
13 programs can book at least one of the nonstop airlines: Air Canada Aeroplan, Air New Zealand Airpoints, ANA Mileage Club, Avianca LifeMiles, Emirates Skywards, EVA Air Infinity MileageLands, JetBlue TrueBlue, Lufthansa Miles & More and 5 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does TUS 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 TUS to DEN with taxes and fees.
Where can I connect between Tucson and Denver?
The most direct connections are through Phoenix (PHX), Salt Lake City (SLC), Las Vegas (LAS), San Diego (SAN) and Santa Ana (SNA). On 7 of them the same airline flies both flights, for example American Airlines through Phoenix.
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.