Cheap Flights from Denver to Seattle

Cheapest flights from Denver to Seattle

Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from Denver to Seattle. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.

Cheapest one way flight

$98

Frontier Airlines

Direct flight

3h 4m

07/26/2026

The cheapest one-way flight from Denver to Seattle departs on 07/26/2026, is operated by Frontier Airlines and costs $98

Cheapest round trip flight

$186

Frontier Airlines

1 layover

1d 5h 21m

05/24/2026

The cheapest roundtrip flight from Denver to Seattle departs on 05/24/2026, is operated by Frontier Airlines and costs $186

The fastest flight

2h 59m

Fastest flight from Denver to Seattle takes 2h 59m

Direct flights

Several times a week

There are direct flights on this route 4 days a week: Su, Mo, Th, and Sa

Earliest flight

7:00 AM

Latest flight

8:55 PM

Direct flights count

12

Distance

1641km

Timezone difference

1h

The distance between Denver and Seattle is 1641km (1017 miles). There are 12 direct flights from Denver to Seattle. The time difference between Denver and Seattle is 1h. Flights from Denver begin at 7:00 AM. The latest flight from Denver departs at 8:55 PM

Remember that on average the ideal time to book flights is 2 months before departure!

Airfare from Denver to Seattle by month

In different months, ticket prices from Denver to Seattle vary: minimum — $98 (July 2026), maximum — $6,741 (April 2027). Typically, the flight costs $2,315–$6,847.

July 2026

Lowest price

on average:

$98

April 2027

Highest price

on average:

$6,741

Avg Price

Price dynamics

Ticket prices for Denver — Seattle follow a predictable curve: rise, peak, and decline. This typical seasonal pattern lets you plan your purchase to avoid overpaying.

Cheaper and more expensive periods

Prices rise from July 2026 to April 2027 (+6798%), then decline from May 2026 to July 2026 (8%). The cheapest tickets are in May 2026–July 2026 (averaging $102), while the priciest are in July 2026–April 2027 ($3,420).

Best time to buy

For savings, plan your flight for May 2026–July 2026 — you could save up to 97%. Try to avoid July 2026–April 2027 when possible: prices are at their highest then.

Price predictability

Price spread on this route is 135.2%. Costs depend heavily on the season, so flexibility in choosing your departure month is especially valuable here.

Airlines operating on route

The route Denver — Seattle is served by many carriers — 4 in total, including Frontier Airlines, United Airlines, Alaska Airlines, and Lufthansa. This gives passengers wide opportunities: from finding the lowest fare (from $98) to selecting flights by schedule or service class. Our service aggregates data from multiple booking systems so you can compare offers in one place. This saves time and money: no need to check dozens of sites — just pick the right option and book online.

starting at $98

starting at $191

starting at $227

starting at $6,741

Non-stop flights from Denver to Seattle

A non-stop flight is the most convenient and comfortable way to fly from Denver to Seattle, despite the fact that sometimes flights with transfers can cost significantly less.

Denver — Seattle

DEN — SEA

05/07/2026

Departure

Direct flight

F94545

starting at $210

Denver — Seattle

DEN — SEA

05/09/2026

Departure

Direct flight

UA2651

starting at $214

Denver — Seattle

DEN — SEA

05/10/2026

Departure

Direct flight

UA360

starting at $191

Denver — Seattle

DEN — SEA

05/23/2026

Departure

Direct flight

F94545

starting at $290

Denver — Seattle

DEN — SEA

07/27/2026

Departure

Direct flight

AS493

starting at $227

Schedule of direct flights from Denver to Seattle

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Denver airports overview

Centennial Airport

•

APA

1km

Denver International Airport

•

DEN

30km

•

Seattle airports overview

Boeing Field International Airport

•

BFI

8km

Seattle-Tacoma International Airport

•

SEA

19km

Primary air hub for the Seattle metropolitan area and Puget Sound, offering extensive domestic and international routes, multiple terminals, light rail and shuttle connections, and convenient access to downtown Seattle.

•

Frequently asked questions (FAQ)

Answers to questions about the route that travelers are most interested in.

What is the cheapest price for flights from Denver to Seattle?

The cheapest flight ticket from Denver to Seattle according to data for the last 48 hours costs $98

When is the best time to buy air tickets on the route Denver — Seattle?

Often the best time to buy tickets from Denver to Seattle is 2 months before departure.

When is the cheapest time of year to fly from Denver to Seattle?

Based on statistics over the past years, the lowest prices for flights from Denver to Seattle can be found flying in these months: July, May, April.

How long does it take to fly from Denver to Seattle?

The fastest flights from Denver to Seattle start from 2 hours 59 minutes in the air.

Which airline can fly direct from Denver to Seattle?

The following airlines operate direct flights on the route Denver — Seattle: Frontier Airlines, United Airlines, Alaska Airlines

Special offers and sales on air tickets from Denver to Seattle

We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.

We couldn't find any special offers for flights from Denver to Seattle

Alternative routes

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Cheapest one way flight

$98

Frontier Airlines

Direct flight

3h 4m

07/26/2026

The cheapest one-way flight from Denver to Seattle departs on 07/26/2026, is operated by Frontier Airlines and costs $98

Cheapest round trip flight

$186

Frontier Airlines

1 layover

1d 5h 21m

05/24/2026

The cheapest roundtrip flight from Denver to Seattle departs on 05/24/2026, is operated by Frontier Airlines and costs $186

The fastest flight