Denver International Airport (DEN)
Denver International Airport is a hub or base for 2 low-cost airlines in our directory: Southwest Airlines and Frontier Airlines.
- 2low-cost airlines basedLCCs based
- 803Southwest fleet, as of 30 September 2026Southwest fleet · 30 September 2026
- from €90cheapest cached fare (DEN–MCO, Frontier), one way, found 22 Oct 2026cached fare · found 22 Oct 2026
- 2other bases of these airlineslinked bases
Low-cost departures today
We don't show a departures board for Denver yet.
Boards cover 3 airports for now: London Stansted, Dublin and London Gatwick. The airlines below fly from Denver, and their profiles list where they go.
Low-cost airlines based at DenverLow-cost airlines based here
Carriers with a hub or base here, from our curated database — not every airline that flies here. Fleet figures are each airline’s whole fleet, with the source and the date it describes.
- United States · Hubs DEN · LAS · MDW +3 · founded 1971Fleet 803 aircraftAirline report · as of
- United States · Hubs DEN · MCO · LAS +3 · founded 1994Fleet 165 aircraftAirline report · as of
Also flying from DEN
Low-cost airlines in our directory that aren’t based at Denver International Airport but have routes to or from it: 5 airlines. Route data from AviationStack, as of ; seasonal routes can appear outside their season.
Destinations from DEN hubs
Each card pairs Denver International Airport with another base of the same airline. Prices are the cheapest direct one-way fare for one adult that Aviasales users found in the last 30 days, with the date it was found — not a live price. Search to see today’s fares.
- Southwest AirlinesBOTH BASESDENDenverLASLas VegasSearch this route no cached fare
- Frontier AirlinesDEPARTS NOV 2026DENDenverMCOOrlandofrom €90one adult, one wayfound
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About Denver International Airport
- IATA / ICAO
- DEN / KDEN
- City / country
- Denver, United States
- Coordinates
- 39.8600° N, 104.6738° W
- Official website
- flydenver.com
Contact details are for Denver International Airport directly. For bookings, use the airline or our booking partner. Reference data: OurAirports (public domain).
Other airports in the United States
Cheap flight alerts from Denver
Your home airport is set to DEN — change the code if you fly from somewhere else.
Frequently asked
Which low-cost airlines are based at Denver International Airport?
In our directory of low-cost airlines, Southwest Airlines and Frontier Airlines list Denver International Airport (DEN) as a hub or base.
Which airline based at Denver International Airport has the largest fleet?
Of the airlines based here, Southwest Airlines has the largest published fleet: 803 aircraft (Airline report, as of 30 September 2026). That figure counts the whole fleet, not only aircraft based at DEN.
Does this page list every airline at Denver International Airport?
No. It lists the low-cost airlines in our directory that name Denver International Airport as a hub or base. Other airlines, including low-cost carriers based elsewhere, may also fly here.
Which other airports in the United States are low-cost airline bases?
In our directory: Harry Reid International Airport (LAS, 3 airlines) and Orlando International Airport (MCO, 3 airlines).