Cheap Flights from Denver, CO to Seattle, WA from $72

Return flight: Seattle – Denver

On Cheapflightsplus.com you will find 7 direct and 56 connecting flights from Denver to Seattle. You can compare airfare deals from 6 airlines and multiple travel sites from $72, book and save on cheap plane tickets and last minute offers. Also check out DEN-SEA flight schedule to find best flight time, convenient departure and arrival airports.

Flight Information

Below we will explain in detail what the flights cost on the destination from Denver to Seattle depends on and how to choose the most interesting flight option for you.

Distance between Denver and Seattle is 1644 miles. Time difference between the cities is 1h. Airplanes depart 05:02 to 23:59 from 2 Denver airports and arrive 05:02 to 23:59 to 3 Seattle airports. Average flight time is 2h 58m.

  • The fastest flight 2h 57m
  • Average flight time 2h 58m
  • The earliest flight 05:02
  • The latest flight 23:59
  • Distance 1022 ml

The cheapest months to travel to Seattle are august (from 72 $), july (from 94 $), may (from 98 $).

The most expensive months are november (from 187 $), october (from 152 $), february (from 139 $).

What is the lowest airfare Denver to Seattle?

The cheapest plane ticket found by our users is $72. This airfare is for economy class on one-way F91175 flight by Frontier Airlines for July 27, 2025 which leaves Denver International in Denver at 16:44 am and arrives at Seattle Seattle-Tacoma Intl at 18:46.

Economy class
$72
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Business class
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First class
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Flight Schedule Denver (Colorado) to Seattle (Washington)

06:00 — 08:01
3h 1m flight time
Find flight
from$106
Denver — Seattle
UA751 United Airlines
07:00 — 14:06
8h 6m flight time
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from$97
06:00 — 07:09 Denver — Las Vegas
F92015 Frontier Airlines
3h 15m stop
15:44 — 18:38 Las Vegas — Seattle
F92407 Frontier Airlines
08:08 — 10:08
3h flight time
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from$127
Denver — Seattle
UA204 United Airlines
11:20 — 13:18
2h 58m flight time
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from$152
Denver — Seattle
UA690 United Airlines
11:33 — 15:24
4h 51m flight time
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from$107
11:33 — 13:20 Denver — Portland
AS1136 Alaska Airlines
1h 10m stop
14:30 — 15:24 Portland — Seattle
AS2188 Alaska Airlines
11:33 — 16:40
6h 7m flight time
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from$139
11:33 — 13:20 Denver — Portland
HA4863 Hawaiian Airlines
2h 20m stop
15:40 — 16:40 Portland — Seattle
HA6419 Hawaiian Airlines
11:33 — 16:40
6h 7m flight time
Find flight
from$148
11:33 — 13:20 Denver — Portland
AS1136 Alaska Airlines
2h 20m stop
15:40 — 16:40 Portland — Seattle
AS3446 Alaska Airlines
11:33 — 17:20
6h 47m flight time
Find flight
from$187
11:33 — 13:20 Denver — Portland
HA4863 Hawaiian Airlines
1h 10m stop
14:30 — 15:21 Portland — Redmond
HA6417 Hawaiian Airlines
40m stop
16:01 — 17:20 Redmond — Seattle
HA6513 Hawaiian Airlines
11:33 — 17:20
6h 47m flight time
Find flight
from$200
11:33 — 13:20 Denver — Portland
AS1136 Alaska Airlines
1h 10m stop
14:30 — 15:21 Portland — Redmond
AS3003 Alaska Airlines
40m stop
16:01 — 17:20 Redmond — Seattle
AS3363 Alaska Airlines
13:56 — 15:54
2h 58m flight time
Find flight
from$137
Denver — Seattle
UA1951 United Airlines
15:03 — 17:00
2h 57m flight time
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from$77
Denver — Seattle
HA4865 Hawaiian Airlines
15:03 — 17:00
2h 57m flight time
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from$82
Denver — Seattle
AS535 Alaska Airlines
16:00 — 20:56
5h 56m flight time
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from$151
16:00 — 17:51 Denver — San Francisco
UA2633 United Airlines
57m stop
18:55 — 21:11 San Francisco — Seattle
UA2019 United Airlines
16:44 — 18:46
3h 2m flight time
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from$72
Denver — Seattle
F91175 Frontier Airlines
22:29 — 10:02+1day
12h 33m flight time
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from$102
22:29 — 23:27 Denver — Phoenix
F94753 Frontier Airlines
7h 24m stop
06:48 — 10:04 Phoenix — Seattle
F91723 Frontier Airlines
Full flight schedule will help you in detecting at what time planes fly from Denver to Seattle. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
*Departure and arrival times - local. Updated on October 7, 2025.

Popular Airlines on the Route

The flight Denver — Seattle is served by 6 regular airlines and 3 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 10 departures per week at the price of from $ 82 . And the most expensive tickets are offered by United Airlines airline - from $ 1597.

Direct flights

There are 7 nonstop flights on the route. The fastest direct flight is HA4865 by Hawaiian Airlines takes 2h 57m and the cheapest is F91175 by Frontier Airlines for $72.

  • AS - Alaska Airlines
    from $82
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  • F9 - Frontier Airlines
    from $72
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  • HA - Hawaiian Airlines
    from $77
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  • UA - United Airlines
    from $106
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See more direct flights

Connecting Flights

There are 56 flights with layovers on the route. The fastest connecting flight is AS1136 by Alaska Airlines takes 4h 51m and the cheapest is F91175 by Frontier Airlines for $97.

  • AS - Alaska Airlines
    from $107
    Find
  • F9 - Frontier Airlines
    from $97
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  • SY - Sun Country Airlines
    from $307
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  • HA - Hawaiian Airlines
    from $139
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  • UA - United Airlines
    from $151
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  • G4 - Allegiant Air
    from $249
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See more connecting flights

Airports

You can fly from Denver to Seattle from 2 airports (Denver International, Arapahoe Co).

Denver airports

  • Denver International-DEN
    from $72
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  • Arapahoe Co-APA
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Seattle airports

  • Boeing Field International Airport-BFI
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  • Seattle-Tacoma Intl-SEA
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  • Kenmore Air Harbor SPB-LKE
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How to book a plane ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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