Route guide
Cheap Flights from Seattle to Denver: Book Airline Tickets
- Distance
- about 1,020 mi
- Typical flight time
- 2 h 15 min – 3 h 15 min
- Airports
- 1 × 1
- Time difference
- 1 h ahead
This page covers the practical side of flying between Seattle and Denver: which airports to compare, how long the trip takes, and when it is busy. It works for either direction. For a price on your dates, ask a specialist.
Airport pairs to compare
Seattle's airport is connected to downtown by light rail, which makes arrival simple even at busy times. Denver's airport lies on the plains northeast of the city, roughly 25 miles from downtown, so ground transport time matters.
| Pair | Departure airport | Arrival airport |
|---|---|---|
| SEA to DEN | Seattle-Tacoma International | Denver International |
Airlines with a major base at either end
- At Seattle: Delta Air Lines, Alaska Airlines
- At Denver: United Airlines, Southwest Airlines
Airlines with a base at one end often connect through their hub. A specialist can compare nonstop and connecting options on your dates.
When to go and what to expect
Seattle
July through September is the driest and busiest period. From November to March it is rainy, and fares are often lower.
Denver
Ski season (roughly late November through April) and summer are the busiest periods. Winter storms can disrupt flights, and spring snow is not unusual.
Getting between the airport and town
Seattle: Link light rail runs from the airport to downtown in roughly 40 minutes.
Denver: The A Line commuter train runs from the airport to Union Station downtown. Shuttles and rental cars serve the mountains.
Planning ground transport too? See our car rental guide.
Good to know
- Alaska cruises depart from the city roughly from spring through early fall, which can lift demand and hotel prices at that time.
- If you are heading to a ski area, allow extra time on mountain roads in winter, and watch the forecast before travel day.
- Compare the total with bags included, not just the base fare. See baggage fees and taxes and fees.
Frequently asked questions
How far is Seattle from Denver?
The straight-line distance between the main airports is about 1,020 miles (1,650 km). Routes can be longer in practice because of air traffic and weather.
How long is a flight from Seattle to Denver?
A typical scheduled flight takes roughly 2 h 15 min to 3 h 15 min in the air, depending on winds, the aircraft and the airports. Connecting itineraries take longer, and nonstop availability depends on the airline and dates.
Which airports can I use?
At Seattle: SEA (Seattle-Tacoma International). At Denver: DEN (Denver International). Ask for prices on more than one pairing.
Is there a time difference?
Denver is 1 hour ahead of Seattle.
Do you show fares on this page?
No. Fares change constantly, so we do not publish prices that might be out of date. A specialist checks live availability and confirms the full total, including taxes and bags, before you pay.