Cheap Flights from Seattle, WA to Denver, CO from $57

Return flight: Denver – Seattle

On Cheapflightsplus.com you will find 21 direct and 170 connecting flights from Seattle to Denver. You can compare airfare deals from 7 airlines and multiple travel sites from $57, book and save on cheap plane tickets and last minute offers. Also check out SEA-DEN flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Seattle to Denver 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: $57 (one-way), $98 (round-trip).
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Full flight schedule will help you in detecting at what time planes fly from Seattle to Denver. 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
05:07 — 08:48
05:07 — 08:48 UA2269 United Airlines
Seattle — Denver
2h 41m
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from$83
06:25 — 10:12
06:25 — 10:12 F93406 Frontier Airlines
Seattle — Denver
2h 47m
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from$63
08:06 — 11:53
08:06 — 11:53 AS682 Alaska Airlines
Seattle — Denver
2h 47m
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from$96
08:45 — 12:28
08:45 — 12:28 UA1505 United Airlines
Seattle — Denver
2h 43m
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from$83
08:57 — 12:43
08:57 — 12:43 UA1359 United Airlines
Seattle — Denver
2h 46m
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from$108
08:57 — 12:43
08:57 — 12:43 UA347 United Airlines
Seattle — Denver
2h 46m
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from$171
10:20 — 14:07
10:20 — 14:07 AS535 Alaska Airlines
Seattle — Denver
2h 47m
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from$145
11:04 — 14:51
11:04 — 14:51 UA1049 United Airlines
Seattle — Denver
2h 47m
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from$99
12:43 — 16:30
12:43 — 16:30 UA1969 United Airlines
Seattle — Denver
2h 47m
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from$99
12:43 — 16:30
12:43 — 16:30 UA1417 United Airlines
Seattle — Denver
2h 47m
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from$105
13:13 — 16:54
13:13 — 16:54 AS620 Alaska Airlines
Seattle — Denver
2h 41m
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from$121
14:24 — 18:15
14:24 — 18:15 UA2859 United Airlines
Seattle — Denver
2h 51m
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from$108
15:45 — 19:29
15:45 — 19:29 UA757 United Airlines
Seattle — Denver
2h 44m
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from$84
15:45 — 19:36
15:45 — 19:36 UA1747 United Airlines
Seattle — Denver
2h 51m
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from$108
15:49 — 19:32
15:49 — 19:32 HA6650 Hawaiian Airlines
Seattle — Denver
2h 43m
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from$93
16:59 — 20:47
16:59 — 20:47 F91176 Frontier Airlines
Seattle — Denver
2h 48m
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from$57
17:59 — 21:46
17:59 — 21:46 HA6654 Hawaiian Airlines
Seattle — Denver
2h 47m
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from$60
17:59 — 21:46
17:59 — 21:46 AS1163 Alaska Airlines
Seattle — Denver
2h 47m
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from$63
19:00 — 22:40
19:00 — 22:40 UA1218 United Airlines
Seattle — Denver
2h 40m
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from$83
20:17 — 23:59
20:17 — 23:59 HA6652 Hawaiian Airlines
Seattle — Denver
2h 42m
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from$60
20:17 — 23:59
20:17 — 23:59 AS642 Alaska Airlines
Seattle — Denver
2h 42m
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from$64
05:25 — 10:37
05:25 — 06:20 HA6833 Hawaiian Airlines
Seattle — Portland
40m stop
07:00 — 10:37 HA6337 Hawaiian Airlines
Portland — Denver
4h 12m
including layover
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from$90
07:00 — 14:56
07:00 — 09:19 UA2640 United Airlines
Seattle — San Francisco
1h 57m stop
11:16 — 14:56 UA2076 United Airlines
San Francisco — Denver
6h 56m
including layover
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from$110
07:00 — 16:36
07:00 — 09:19 UA2640 United Airlines
Seattle — San Francisco
3h 36m stop
12:55 — 16:36 UA1333 United Airlines
San Francisco — Denver
8h 36m
including layover
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from$124
09:44 — 23:52
09:14 — 15:10 F94066 Frontier Airlines
Seattle — Dallas
6h 52m stop
22:30 — 23:57 F94069 Frontier Airlines
Dallas — Denver
13h 8m
including layover
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from$81
09:50 — 18:13
09:50 — 12:09 UA1470 United Airlines
Seattle — San Francisco
2h 21m stop
14:30 — 18:13 UA2142 United Airlines
San Francisco — Denver
7h 23m
including layover
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from$111
11:00 — 19:10
11:00 — 13:57 HA6887 Hawaiian Airlines
Seattle — San Diego
1h 40m stop
15:37 — 19:10 HA6408 Hawaiian Airlines
San Diego — Denver
7h 10m
including layover
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from$129
12:13 — 23:20
12:13 — 15:13 F93974 Frontier Airlines
Seattle — Phoenix
5h 8m stop
20:21 — 23:20 F92142 Frontier Airlines
Phoenix — Denver
10h 7m
including layover
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from$88
13:50 — 20:42
12:29 — 15:08 F93163 Frontier Airlines
Seattle — Ontario
51m stop
16:08 — 19:26 F92908 Frontier Airlines
Ontario — Denver
5h 52m
including layover
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from$89
13:50 — 21:04
13:50 — 19:11 SY284 Sun Country Airlines
Seattle — Minneapolis
49m stop
20:00 — 21:04 SY1609 Sun Country Airlines
Minneapolis — Denver
6h 14m
including layover
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from$105
14:37 — 04:20
+1 day
13:50 — 16:26 F93163 Frontier Airlines
Seattle — Ontario
7h 43m stop
00:59 — 04:17 F91500 Frontier Airlines
Ontario — Denver
12h 43m
including layover
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from$81
14:59 — 23:47
14:59 — 17:47 HA6885 Hawaiian Airlines
Seattle — San Diego
2h 32m stop
20:19 — 23:47 HA6403 Hawaiian Airlines
San Diego — Denver
7h 48m
including layover
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from$80
15:44 — 03:59
+1 day
15:11 — 17:50 F94830 Frontier Airlines
Seattle — Las Vegas
6h 35m stop
00:59 — 04:00 F91994 Frontier Airlines
Las Vegas — Denver
11h 15m
including layover
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from$81
15:44 — 09:09
+1 day
14:55 — 17:32 F94830 Frontier Airlines
Seattle — Las Vegas
11h 36m stop
11:00 — 14:06 F92350 Frontier Airlines
Las Vegas — Denver
16h 25m
including layover
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from$81
16:54 — 22:33
16:29 — 19:36 F94988 Frontier Airlines
Seattle — Salt Lake City
55m stop
20:36 — 22:12 F94252 Frontier Airlines
Salt Lake City — Denver
4h 39m
including layover
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from$85
19:02 — 17:29
+1 day
18:33 — 23:59 SY286 Sun Country Airlines
Seattle — Minneapolis
15h 56m stop
16:12 — 17:27 SY657 Sun Country Airlines
Minneapolis — Denver
21h 27m
including layover
Find flight
from$131
23:59 — 11:22
+1 day
23:59 — 05:16 SY290 Sun Country Airlines
Seattle — Minneapolis
4h 56m stop
12:06 — 13:17 SY653 Sun Country Airlines
Minneapolis — Denver
10h 23m
including layover
Find flight
from$105
23:59 — 10:23
+1 day
23:59 — 05:13 SY290 Sun Country Airlines
Seattle — Minneapolis
3h 56m stop
15:54 — 17:01 SY1609 Sun Country Airlines
Minneapolis — Denver
9h 24m
including layover
Find flight
from$117
*Departure and arrival times - local. Updated on June 24, 2025

Flight Information

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

Distance between Seattle and Denver is 1644 miles. Time difference between the cities is 1h. Airplanes depart 00:20 to 23:59 from 3 Seattle airports and arrive 00:20 to 23:59 to 2 Denver airports. Average flight time is 2h 47m.

  • The fastest flight 2h 40m
  • Average flight time 2h 47m
  • The earliest flight 00:20
  • The latest flight 23:59
  • Distance 1022 ml

The cheapest months to travel to Denver are june (from 52 $), may (from 54 $), december (from 72 $).

The most expensive months are november (from 229 $), february (from 107 $), october (from 85 $).

What is the lowest airfare Seattle to Denver?

The cheapest plane ticket found by our users is $57. This airfare is for economy class on one-way F91176 flight by Frontier Airlines for August 15, 2025 which leaves Seattle-Tacoma Intl in Seattle at 16:59 am and arrives at Denver Denver International at 20:47.

Economy class
$57
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Business class
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First class
?
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Popular Airlines on the Route

The flight Seattle — Denver is served by 7 regular airlines and 3 low-cost airlines. Most of the flights on this route are operated by Frontier Airlines - 14 departures per week at the price of from $ 57 . And the most expensive tickets are offered by Turkish Airlines airline - from $ 1240.

Direct flights

There are 21 nonstop flights on the route. The fastest direct flight is UA1218 by United Airlines takes 2h 40m and the cheapest is F91176 by Frontier Airlines for $57.

See more direct flights

Connecting Flights

There are 170 flights with layovers on the route. The fastest connecting flight is HA6826 by Hawaiian Airlines takes 4h 11m and the cheapest is F91176 by Frontier Airlines for $80.

  • from $81
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  • from $110
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  • AS - Alaska Airlines
    from $88
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  • SY - Sun Country Airlines
    from $105
    Find
  • TK - Turkish Airlines
    from $1240
    Find
  • HA - Hawaiian Airlines
    from $80
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  • NK - Spirit Airlines
    from $107
    Find
See more connecting flights

Airports

You can fly from Seattle to Denver from 3 airports (Boeing Field International Airport, Seattle-Tacoma Intl, Kenmore Air Harbor SPB).

Seattle airports

  • Boeing Field International Airport-BFI
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  • Seattle-Tacoma Intl-SEA
    from $57
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  • Kenmore Air Harbor SPB-LKE
    Find

Denver airports

  • Denver International-DEN
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  • Arapahoe Co-APA
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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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