
Popular airlines from Seattle-Tacoma International Airport (SEA) to Denver Intl. Airport (DEN)
- Alaska Airlines
Alaska Airlines
- Frontier Airlines
Frontier Airlines
- Delta
Delta
- American Airlines
American Airlines
- United
United
- Southwest Airlines
Southwest Airlines
- Hawaiian Airlines
Hawaiian Airlines
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Cheap Flights from Seattle to Denver (SEA-DEN)
Prices were available within the past 7 days and start at S$70 for one-way flights and S$139 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.










Find the cheapest month to fly from Seattle (SEA) to Denver (DEN)
October is typically the cheapest month to fly
Frequently asked questions
Travel information
Travel information
Origin airport | Seattle - Tacoma Intl. |
Destination airport | Denver Intl. |
Return price | S$139 |
Distance | 1635 km |
Average flight time | 3 hours 39 mins |
Book with confidence
Book with confidence
Flights from Seattle to Denver
There are several airlines that operate frequent flights from Seattle (SEA) to Denver (DEN) including
- Alaska Airlines with 245 flights a week
- Delta Air Lines with 219 flights a week
- with 102 flights a week
- American Airlines with 68 flights a week
- United Airlines with 38 flights a week
The earliest flight leaves Seattle Tacoma Intl. Airport at 05:09 and arrives at Denver Intl. Airport at 00:42. The last flight of the day departs Seattle at 21:15 and arrives at Denver at 23:25.
The flight distance from Seattle to Denver is about 1654 km, the shortest flight is 02 hours 24 minutes with .
Expedia lets you search across the largest number of airlines and Denver flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Seattle Denver flight!
Browse through dozens of options and rest assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Seattle to Denver trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.
Combine your Denver flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from Seattle to Denver with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!
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