Denver International Airport
23 miles (37 km) from the city centre. 82.4 million passengers in 2024
| How | Route | Time | Cost |
|---|---|---|---|
| Train | RTD A Line to Denver Union Station | about 37m | $10 Airport Day Pass |
Flights from Seattle to Denver
5 airlines fly nonstop from Seattle to Denver.
- Distance
- 1,020 mi
- Nonstop flight
- Varies
- Time difference
- +1h
- Nonstop airlines
- 5
Fares from Seattle to Denver
Checking today’s fares with the airlines.
Nonstop flights
| Airline | From | To |
|---|---|---|
| Alaska Airlines | SEA Seattle-Tacoma International Airport | DEN Denver International Airport |
| Delta Air Lines | SEA Seattle-Tacoma International Airport | DEN Denver International Airport |
| United Airlines | SEA Seattle-Tacoma International Airport | DEN Denver International Airport |
| Southwest Airlines | SEA Seattle-Tacoma International Airport | DEN Denver International Airport |
| Frontier Airlines | SEA Seattle-Tacoma International Airport | DEN Denver International Airport |
Nonstop service as of October 2026. Airlines change schedules seasonally.
Getting from the airport into Denver
Before you go
No passport or visa is needed for domestic travel, but a REAL ID-compliant license or another accepted ID is required to fly within the US.
Denver is 1 hour ahead of Seattle. Denver uses the US dollar (USD).
Read the Denver guide: when to go, weather, airports and tips
Frequently asked questions
How long is the flight from Seattle to Denver?
Nonstop flight times vary by airline and season; flights with a connection take longer.
Which airlines fly nonstop from Seattle to Denver?
As of October 2026, Alaska Airlines, Delta Air Lines, United Airlines, Southwest Airlines and Frontier Airlines fly this route nonstop.
How far is Denver from Seattle?
About 1,020 miles (1,641 km), measured between the city centres.
What is the time difference?
Denver is 1 hour ahead of Seattle.
What ID do I need to fly to Denver?
No passport or visa is needed for domestic travel, but a REAL ID-compliant license or another accepted ID is required to fly within the US.
How do I get from Denver International Airport into Denver?
RTD A Line to Denver Union Station, about 37 minutes, $10 Airport Day Pass.
Related pages
Sources
Information checked in October 2026. Schedules, fares and entry rules change, so confirm with the airline or the official source before you travel.