Major international hub · Denver, Colorado
Denver International Airport (DEN)
A hub for United Airlines, Southwest Airlines and Frontier Airlines. Compare flights from and to DEN, see which airlines fly nonstop, and find the cheapest month to travel.
DEN at a glance
- IATA / ICAO
- DEN / KDEN
- City
- Denver, Colorado
- Time zone
- America/Denver (UTC−6)
- Airport size
- Major international hub
- Coordinates
- 39.856, -104.674
- Country
- United States
Popular routes from DEN
Airlines at DEN
Hub airlines first, then carriers with nonstop routes from this airport.
- UAUnited AirlinesHub airline
- WNSouthwest AirlinesHub airline
- F9Frontier AirlinesHub airline
- AAAmerican AirlinesNonstop routes
- NKSpirit AirlinesLow-cost carrier
- SYSun Country AirlinesLow-cost carrier
- DLDelta Air LinesNonstop routes
- B6JetBlueNonstop routes
- ASAlaska AirlinesNonstop routes
- MXBreeze AirwaysLow-cost carrier
DEN: common questions
Which airlines fly from DEN?
United Airlines, Southwest Airlines, Frontier Airlines, American Airlines and Spirit Airlines and others serve Denver International Airport. United Airlines, Southwest Airlines and Frontier Airlines use DEN as a hub, so expect the widest choice of nonstop routes from them.
Is DEN a hub airport?
Yes — Denver International Airport is a hub or focus city for United Airlines, Southwest Airlines and Frontier Airlines, which means frequent departures and many connecting itineraries pass through it.
How early should I arrive at DEN?
Plan on two hours before a domestic departure and three hours before an international one — security lines at large airports like DEN can stretch to 30 minutes or more at peak times. TSA PreCheck or CLEAR typically saves 15–30 minutes.