SEADEN·~2h 30m nonstop
Cheap SEA to Denver Flights
Bag fees in the price
Seattle to Denver is a popular ski-season and outdoor-adventure route. Alaska Airlines has strong frequency from SEA, and Frontier offers budget fares with high add-on fees that Spotvoy filters for clarity.
Search SEA to DEN flights
Spotvoy compares fares across providers and shows true trip cost with bag fees.
Flight time from SEA to DEN
The typical nonstop flight time from SEA to DEN is ~2h 30m. Actual flight time varies by wind conditions and specific routing.
Route facts
Nonstop flight time SEA–DEN is approximately 2 hours 30 minutes. Alaska dominates with frequency. Frontier's low base fares often look attractive until bag fees are added.
Spotvoy tip for this route
Frontier fares to Denver are frequently the cheapest headline price, but their carry-on and bag fees ($50+ each way) often flip the ranking. Spotvoy shows you the total before you fall for the base fare.
Planning a trip to Denver?
See our full guide to Denver — airport facts, family tips, and the best time to visit.
Denver travel guide →Common questions about SEA–DEN flights
How long is the flight from Seattle to Denver?
The typical nonstop flight time from SEA to DEN is ~2h 30m. Actual flight time varies by wind conditions and specific routing.
What is the flight time from SEA to DEN?
The typical nonstop flight time from SEA to DEN is ~2h 30m. Actual flight time varies by wind conditions and specific routing.
How long is the flight from SEA to Denver?
The typical nonstop flight time from SEA to DEN is ~2h 30m. Actual flight time varies by wind conditions and specific routing.
What airlines fly SEA to DEN?
Nonstop flight time SEA–DEN is approximately 2 hours 30 minutes. Alaska dominates with frequency. Frontier's low base fares often look attractive until bag fees are added.
What is the true cost of a flight from Seattle to Denver?
The headline fare is only part of the real cost. Spotvoy adds checked bag fees (typically $0 on Southwest, $30–65 on other carriers), seat selection if needed (for families), and estimates ground transport to and from the airport. The total can vary significantly from the advertised fare, especially for families.
What's the cheapest month to fly SEA to DEN?
Fares on this route shift by season. Midweek departures (Tuesday–Wednesday) typically save 10–20% versus weekend flights. Spotvoy compares live fares across dates so you can see when the true trip cost — bags included — is lowest for your trip.
Where can I find cheap flights from Seattle to Denver?
Search SEA to DEN on Spotvoy to compare headline fares plus bag fees and seat costs. Midweek departures and booking a few weeks ahead usually lower the true trip cost. Frontier fares to Denver are frequently the cheapest headline price, but their carry-on and bag fees ($50+ each way) often flip the ranking. Spotvoy shows you the total before you fall for the base fare.
Are there direct flights from SEA to DEN?
Nonstop flight time SEA–DEN is approximately 2 hours 30 minutes. Alaska dominates with frequency. Frontier's low base fares often look attractive until bag fees are added. Typical nonstop time is ~2h 30m nonstop.
Does Alaska fly from SEA to DEN?
Nonstop flight time SEA–DEN is approximately 2 hours 30 minutes. Alaska dominates with frequency. Frontier's low base fares often look attractive until bag fees are added.
Does Frontier fly from SEA to DEN?
Nonstop flight time SEA–DEN is approximately 2 hours 30 minutes. Alaska dominates with frequency. Frontier's low base fares often look attractive until bag fees are added.
What are the cheapest SEA to DEN flights?
Search SEA to DEN on Spotvoy for true trip cost with bag fees — the cheapest headline fare is not always cheapest for families. Frontier fares to Denver are frequently the cheapest headline price, but their carry-on and bag fees ($50+ each way) often flip the ranking. Spotvoy shows you the total before you fall for the base fare.
Are there SEA to DEN flights today?
Same-day SEA–DEN seats depend on season and day of week — this route is moderately served. Spotvoy compares fares across dates; use your airline app for live gate status after booking.
What is the flight time from Seattle to Denver?
Nonstop SEA to DEN is typically ~2h 30m nonstop. Nonstop flight time SEA–DEN is approximately 2 hours 30 minutes. Alaska dominates with frequency. Frontier's low base fares often look attractive until bag fees are added.
Tips for flying SEA to DEN?
Frontier fares to Denver are frequently the cheapest headline price, but their carry-on and bag fees ($50+ each way) often flip the ranking. Spotvoy shows you the total before you fall for the base fare.