S$113 Cheap Flights from Seattle to Denver

View S$113 flight on Fri, 10 Oct, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Denver Intl. Airport (DEN)

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Cheap Flights from Seattle to Denver (SEA-DEN)

Prices were available within the past 7 days and start at S$113 for one-way flights and S$213 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$213 Return, found 1 day ago
S$213
Return
found 1 day ago
Select Delta flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$213 found 1 day ago
Delta
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$290 Return, found 1 day ago
S$290
Return
found 1 day ago
Select Delta flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$290 found 1 day ago
American Airlines
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$303 Return, found 1 day ago
S$303
Return
found 1 day ago
Select American Airlines flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$303 found 1 day ago
Delta
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$303 Return, found 1 day ago
S$303
Return
found 1 day ago
Select Delta flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$303 found 1 day ago
United
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$316 Return, found 1 day ago
S$316
Return
found 1 day ago
Select United flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$316 found 1 day ago
United
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$329 Return, found 1 day ago
S$329
Return
found 1 day ago
Select United flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$329 found 1 day ago
United
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$329 Return, found 1 day ago
S$329
Return
found 1 day ago
Select United flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$329 found 1 day ago
American Airlines
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$342 Return, found 1 day ago
S$342
Return
found 1 day ago
Select American Airlines flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$342 found 1 day ago
Delta
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$348 Return, found 1 day ago
S$348
Return
found 1 day ago
Select Delta flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$348 found 1 day ago
United
Sat, 25 Oct - Fri, 31 Oct
SEA
Seattle
DEN
Denver
S$354 Return, found 1 day ago
S$354
Return
found 1 day ago
Select United flight, departing Sat, 25 Oct from Seattle to Denver, returning Fri, 31 Oct, priced at S$354 found 1 day ago

Find the cheapest month to fly from Seattle (SEA) to Denver (DEN)

January is typically the cheapest month to fly

From S$83 - S$304 per traveller.

Graph displaying average flight prices per month

Seattle to Denver route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Denver Intl.
Airlines serving
American Airlines, Delta, United
Return price
S$212
Distance
1635 km
Average flight time
3 hours 40 mins

Flights from Seattle to Denver

There are several airlines that operate frequent flights from Seattle (SEA) to Denver (DEN) including

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!

Frequently asked questions

How much is a flight from SEA to Denver Airport?
If you're travelling between SEA and Denver Intl. Airport (DEN), round-trip journeys start from S$213. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year, so don't let a good deal pass you by. Book now and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Sea-Tac Airport to Denver Airport?
This can differ between air carriers, as each has its own terms and conditions. Visit the Customer Service Portal, where there are instructions on how to cancel online.
How do I find cheap flights from Sea-Tac Airport to Denver Intl. Airport (DEN) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Sea-Tac Airport to Denver Intl. Airport (DEN) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from SEA to DIA airport?
The flight distance from SeaTac to Denver is 1,650 kilometres. Bring along a snack, a drink and an interesting novel to read. Keep yourself entertained and the time will fly by.
Which airlines fly direct from SEA to Denver Intl. Airport (DEN)?
It's easy to fly directly from Sea-Tac Airport to Denver Airport. These are the top carriers that operate nonstop services on this route:

  • United Airlines - (UA) with 147 monthly flights
  • Southwest Airlines - (WN) with 130 monthly flights
  • Alaska Airlines - (AS) with 117 monthly flights
  • Delta Air Lines - (DL) with 91 monthly flights

Are SEA to DEN flight tickets cheaper when they're purchased at the last minute?
It is possible to get a great last-minute deal from SEA to Denver Intl. Airport (DEN), but there's no guarantee. As many airlines publish prices up to 12 months in advance, it's worthwhile keeping an eye on fares early and being ready to pounce when you see a bargain. Expedia compares air carrier prices and updates flight deals all the time, so you can be sure you're always getting the latest offers.

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Seattle Airports

Seattle Paine Field Intl. Airport

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