S$101 Cheap Flights from Denver to Seattle

View S$101 flight on Tue, 19 Aug, 2025Opens in a new window

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

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Cheap Flights from Denver to Seattle (DEN-SEA)

Prices were available within the past 7 days and start at S$101 for one-way flights and S$520 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, 2 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$520 Return, found 8 hours ago
S$520
Return
found 8 hours ago
Select Delta flight, departing Wed, 2 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$520 found 8 hours ago
Delta
Thu, 3 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$533 Return, found 8 hours ago
S$533
Return
found 8 hours ago
Select Delta flight, departing Thu, 3 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$533 found 8 hours ago
Delta
Thu, 3 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$545 Return, found 8 hours ago
S$545
Return
found 8 hours ago
Select Delta flight, departing Thu, 3 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$545 found 8 hours ago
United
Wed, 2 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$572 Return, found 8 hours ago
S$572
Return
found 8 hours ago
Select United flight, departing Wed, 2 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$572 found 8 hours ago
United
Wed, 2 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$585 Return, found 8 hours ago
S$585
Return
found 8 hours ago
Select United flight, departing Wed, 2 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$585 found 8 hours ago
Delta
Thu, 3 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$597 Return, found 8 hours ago
S$597
Return
found 8 hours ago
Select Delta flight, departing Thu, 3 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$597 found 8 hours ago
Delta
Wed, 2 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$604 Return, found 8 hours ago
S$604
Return
found 8 hours ago
Select Delta flight, departing Wed, 2 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$604 found 8 hours ago
United
Thu, 3 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$611 Return, found 8 hours ago
S$611
Return
found 8 hours ago
Select United flight, departing Thu, 3 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$611 found 8 hours ago
Delta
Thu, 3 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$616 Return, found 8 hours ago
S$616
Return
found 8 hours ago
Select Delta flight, departing Thu, 3 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$616 found 8 hours ago
American Airlines
Thu, 3 Jul - Sat, 5 Jul
DEN
Denver
SEA
Seattle
S$993 Return, found 8 hours ago
S$993
Return
found 8 hours ago
Select American Airlines flight, departing Thu, 3 Jul from Denver to Seattle, returning Sat, 5 Jul, priced at S$993 found 8 hours ago

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

January is typically the cheapest month to fly

From S$83 - S$335 per traveller.

Graph displaying average flight prices per month

Denver to Seattle route information
Origin airport
Denver Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Return price
S$520
Distance
1635 km
Average flight time
1 hour 55 mins

Flights from Denver to Seattle

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

The earliest flight leaves Denver Intl. Airport at 06:00 and arrives at Seattle Tacoma Intl. Airport at 00:04. The last flight of the day departs Denver at 22:50 and arrives at Seattle at 23:59.

The flight distance from Denver to Seattle is about 1654 km, the shortest flight is 02 hours 44 minutes with .

Expedia lets you search across the largest number of airlines and Seattle 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 Denver Seattle 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 Denver to Seattle trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Seattle 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 Denver to Seattle 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 Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA)?
The lowest price advertised for a round-trip flight from Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA) is S$520. But you better act quick. This price is taken from fares offered within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Denver Intl. Airport (DEN) to SEA?
Every airline has a different set of terms and conditions. If you decide to cancel your trip, visit our Customer Service Portal.
How do I find cheap flights from Denver Airport to Seattle - Tacoma Intl. Airport (SEA) 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 Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from DEN to SEA?
Around 1,650 kilometres separates Denver and SeaTac, so pack some entertainment to keep you busy for a couple of hours. That latest bestseller you're eager to read will be perfect.
Which airlines fly direct from Denver Airport to Seattle - Tacoma Intl. Airport (SEA)?
Travelling from DIA airport to Sea-Tac Airport is easy when you have a nice range of airlines to choose from. Here are some of the best:

  • 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 Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA) flight tickets cheaper when they're purchased at the last minute?
Flight prices fluctuate, so it's no sure thing. While last-minute flight deals between DIA airport and Seattle - Tacoma Intl. Airport (SEA) are of course possible, it also makes sense to keep an eye on prices well before you fly. In fact, some airlines release their prices up to a year prior to the departure date. Expedia is constantly updating the best bargains around, so check back often and be ready to grab your seat when the fares dip.

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Seattle Airports

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