Cheap Flights from Denver, CO to Seattle, WA from $33

Return flight: Seattle – Denver

On Cheapflightsplus.com you will find 24 direct and 408 connecting flights from Denver to Seattle. You can compare airfare deals from 8 airlines and multiple travel sites from $33, 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.

Find One-Way and Round-Trip Denver to Seattle Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $33 (one-way), $57 (round-trip).
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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 Arrival Flight Details Flight Duration Price
06:00 — 08:06
06:00 — 08:06 AS643 Alaska Airlines
Denver — Seattle
3h 6m
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from$112
06:05 — 08:20
06:05 — 08:20 DL1731 Delta Air Lines Inc.
Denver — Seattle
3h 15m
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from$113
06:35 — 08:37
06:35 — 08:37 F91175 Frontier Airlines
Denver — Seattle
3h 2m
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from$33
07:45 — 09:53
07:45 — 09:53 UA1399 United Airlines
Denver — Seattle
3h 8m
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from$101
07:46 — 09:49
07:46 — 09:49 UA204 United Airlines
Denver — Seattle
3h 3m
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from$129
10:43 — 12:48
10:43 — 12:48 AS681 Alaska Airlines
Denver — Seattle
3h 5m
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from$116
11:50 — 13:54
11:50 — 13:54 UA690 United Airlines
Denver — Seattle
3h 4m
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from$143
11:50 — 13:57
11:50 — 13:57 UA2246 United Airlines
Denver — Seattle
3h 7m
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from$193
11:50 — 13:57
11:50 — 13:57 UA423 United Airlines
Denver — Seattle
3h 7m
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from$385
11:55 — 14:00
11:55 — 14:00 UA316 United Airlines
Denver — Seattle
3h 5m
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from$247
12:38 — 14:45
12:38 — 14:45 AS682 Alaska Airlines
Denver — Seattle
3h 7m
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from$102
13:40 — 15:58
13:40 — 15:58 DL2740 Delta Air Lines Inc.
Denver — Seattle
3h 18m
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from$124
13:57 — 16:00
13:57 — 16:00 AS1006 Alaska Airlines
Denver — Seattle
3h 3m
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from$65
15:45 — 17:49
15:45 — 17:49 AS620 Alaska Airlines
Denver — Seattle
3h 4m
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from$153
16:01 — 18:03
16:01 — 18:03 UA745 United Airlines
Denver — Seattle
3h 2m
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from$141
16:04 — 18:09
16:04 — 18:09 UA759 United Airlines
Denver — Seattle
3h 5m
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from$151
16:27 — 18:34
16:27 — 18:34 AS1005 Alaska Airlines
Denver — Seattle
3h 7m
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from$247
17:08 — 19:10
17:08 — 19:10 AS615 Alaska Airlines
Denver — Seattle
3h 2m
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from$102
19:00 — 21:01
19:00 — 21:01 UA299 United Airlines
Denver — Seattle
3h 1m
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from$140
19:08 — 21:11
19:08 — 21:11 F93405 Frontier Airlines
Denver — Seattle
3h 3m
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from$60
19:55 — 21:58
19:55 — 21:58 AS525 Alaska Airlines
Denver — Seattle
3h 3m
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from$198
19:56 — 22:00
19:56 — 22:00 AS705 Alaska Airlines
Denver — Seattle
3h 4m
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from$211
19:59 — 22:20
19:59 — 22:20 DL4094 Delta Air Lines Inc.
Denver — Seattle
3h 21m
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from$113
20:44 — 22:45
20:44 — 22:45 UA2651 United Airlines
Denver — Seattle
3h 1m
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from$129
06:45 — 15:58
06:45 — 08:53 F91375 Frontier Airlines
Denver — Phoenix
4h 51m stop
13:44 — 15:58 F93973 Frontier Airlines
Phoenix — Seattle
10h 13m
including layover
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from$65
07:45 — 15:21
07:45 — 09:32 UA2391 United Airlines
Denver — San Francisco
3h 31m stop
13:03 — 15:21 UA2391 United Airlines
San Francisco — Seattle
8h 36m
including layover
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from$107
08:08 — 12:50
08:08 — 09:45 F93981 Frontier Airlines
Denver — Salt Lake City
1h 33m stop
11:18 — 12:50 F94987 Frontier Airlines
Salt Lake City — Seattle
5h 42m
including layover
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from$64
08:54 — 14:15
08:20 — 09:46 F91261 Frontier Airlines
Denver — Ontario
1h stop
07:58 — 10:54 F93164 Frontier Airlines
Ontario — Seattle
6h 21m
including layover
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from$62
09:15 — 15:25
09:06 — 10:55 UA754 United Airlines
Denver — San Francisco
1h 59m stop
13:00 — 15:18 UA2650 United Airlines
San Francisco — Seattle
7h 10m
including layover
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from$128
09:43 — 15:58
09:43 — 11:48 F91819 Frontier Airlines
Denver — Phoenix
1h 56m stop
13:44 — 15:58 F93973 Frontier Airlines
Phoenix — Seattle
7h 15m
including layover
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from$64
10:15 — 15:45
10:15 — 12:04 UA2041 United Airlines
Denver — San Francisco
1h 21m stop
13:25 — 15:45 UA593 United Airlines
San Francisco — Seattle
6h 30m
including layover
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from$152
12:54 — 19:15
12:54 — 15:00 F92141 Frontier Airlines
Denver — Phoenix
2h 1m stop
17:01 — 19:15 F93973 Frontier Airlines
Phoenix — Seattle
7h 21m
including layover
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from$147
13:39 — 18:37
12:24 — 14:20 F92141 Frontier Airlines
Denver — Phoenix
54m stop
15:12 — 17:25 F91723 Frontier Airlines
Phoenix — Seattle
5h 58m
including layover
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from$102
14:01 — 20:48
14:01 — 15:39 F94235 Frontier Airlines
Denver — Salt Lake City
3h 46m stop
19:25 — 20:48 F94987 Frontier Airlines
Salt Lake City — Seattle
7h 47m
including layover
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from$64
14:10 — 17:51
14:10 — 16:01 AS336 Alaska Airlines
Denver — Portland
49m stop
16:50 — 17:51 AS2102 Alaska Airlines
Portland — Seattle
4h 41m
including layover
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from$115
15:59 — 21:15
15:43 — 17:32 UA1300 United Airlines
Denver — San Francisco
1h 5m stop
18:50 — 21:07 UA2019 United Airlines
San Francisco — Seattle
6h 16m
including layover
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from$151
16:59 — 20:48
16:59 — 18:32 F94251 Frontier Airlines
Denver — Salt Lake City
53m stop
19:25 — 20:48 F94987 Frontier Airlines
Salt Lake City — Seattle
4h 49m
including layover
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from$64
18:15 — 12:53
+1 day
18:15 — 19:37 F92907 Frontier Airlines
Denver — Ontario
14h 29m stop
10:06 — 12:53 F93164 Frontier Airlines
Ontario — Seattle
19h 38m
including layover
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from$96
19:38 — 08:50
+1 day
18:33 — 19:37 F94967 Frontier Airlines
Denver — Las Vegas
9h 13m stop
15:32 — 18:26 F92407 Frontier Airlines
Las Vegas — Seattle
14h 12m
including layover
Find flight
from$77
22:38 — 10:54
+1 day
22:38 — 00:04 F91499 Frontier Airlines
Denver — Ontario
7h 54m stop
07:58 — 10:54 F93164 Frontier Airlines
Ontario — Seattle
13h 16m
including layover
Find flight
from$62
22:49 — 08:57
+1 day
07:00 — 08:07 F9777 Frontier Airlines
Denver — Las Vegas
5h 58m stop
06:00 — 08:57 F92407 Frontier Airlines
Las Vegas — Seattle
11h 8m
including layover
Find flight
from$65
*Departure and arrival times - local. Updated on April 2, 2025

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 00:35 to 22:59 from 2 Denver airports and arrive 00:35 to 22:59 to 3 Seattle airports. Average flight time is 3h 5m.

  • The fastest flight 3h 1m
  • Average flight time 3h 5m
  • The earliest flight 00:35
  • The latest flight 22:59
  • Distance 1022 ml

The cheapest months to travel to Seattle are november (from 33 $), december (from 58 $), january (from 59 $).

The most expensive months are february (from 67 $), january (from 59 $), december (from 58 $).

What is the lowest airfare Denver to Seattle?

The cheapest plane ticket found by our users is $33. This airfare is for economy class on one-way F91175 flight by Frontier Airlines for February 21, 2025 which leaves Denver International in Denver at 06:35 am and arrives at Seattle Seattle-Tacoma Intl at 08:37.

Economy class
$33
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Business class
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First class
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Popular Airlines on the Route

The flight Denver — Seattle is served by 8 regular airlines and 3 low-cost airlines. Most of the flights on this route are operated by Frontier Airlines - 71 departures per week at the price of from $ 33 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 4322.

Direct flights

There are 24 nonstop flights on the route. The fastest direct flight is UA2651 by United Airlines takes 3h 1m and the cheapest is F91175 by Frontier Airlines for $33.

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Connecting Flights

There are 408 flights with layovers on the route. The fastest connecting flight is UA5714 by United Airlines takes 4h 24m and the cheapest is F91175 by Frontier Airlines for $62.

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Airports

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

Denver airports

  • Denver International-DEN
    from $33
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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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