Cheap Flights from Seattle, WA to Denver, CO from $36

One way Round trip

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On Cheapflightsplus.com you will find 24 direct and 460 connecting flights from Seattle to Denver. You can compare airfare deals from 9 airlines and multiple travel sites from $36, 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: $36 (one-way), $62 (round-trip).

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Best Flights from Seattle to Denver Today

Take a look at the list of non stop flights and flights with layovers from Seattle to Denver with the lowest price of $36. The fastest direct flight takes 2h 35m and the fastest connecting – 4h 10m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $36 Find flight	08:18 Seattle Seattle-Tacoma Intl	12:01 Denver Denver International	2h 43m	Frontier Airlines	F93406
from $36 Find flight	22:08 Seattle Seattle-Tacoma Intl	01:51+1 день Denver Denver International	2h 43m	Frontier Airlines	F91176
from $97 Find flight	18:59 Seattle Seattle-Tacoma Intl	22:36 Denver Denver International	2h 37m	Alaska Airlines	AS321
from $110 Find flight	05:02 Seattle Seattle-Tacoma Intl	08:44 Denver Denver International	2h 42m	United Airlines	UA2269
from $114 Find flight	12:34 Seattle Seattle-Tacoma Intl	16:12 Denver Denver International	2h 38m	Alaska Airlines	AS602
from $125 Find flight	19:50 Seattle Seattle-Tacoma Intl	23:31 Denver Denver International	2h 41m	Delta Air Lines Inc.	DL2851
from $127 Find flight	09:00 Seattle Seattle-Tacoma Intl	12:43 Denver Denver International	2h 43m	United Airlines	UA1829
from $134 Find flight	08:12 Seattle Seattle-Tacoma Intl	11:53 Denver Denver International	2h 41m	Alaska Airlines	AS682
from $137 Find flight	08:55 Seattle Seattle-Tacoma Intl	12:43 Denver Denver International	2h 48m	Delta Air Lines Inc.	DL2740
from $141 Find flight	18:00 Seattle Seattle-Tacoma Intl	21:44 Denver Denver International	2h 44m	United Airlines	UA1279
from $165 Find flight	19:11 Seattle Seattle-Tacoma Intl	22:55 Denver Denver International	2h 44m	United Airlines	UA297
from $70 Find flight	16:58 Seattle Seattle-Tacoma Intl	23:44 Denver Denver International	5h 46m layover 1h 0m - Phoenix	Frontier Airlines	F93974 F92142
from $70 Find flight	12:29 Seattle Seattle-Tacoma Intl	19:26 Denver Denver International	5h 57m layover 1h 0m - Ontario	Frontier Airlines	F93163 F92908
from $78 Find flight	16:35 Seattle Seattle-Tacoma Intl	23:33 Denver Denver International	5h 58m layover 1h 0m - Ontario	Frontier Airlines	F93163 F91500
from $90 Find flight	10:36 Seattle Seattle-Tacoma Intl	08:01+1 день Denver Denver International	20h 25m layover 16h 38m - Salt Lake City	Frontier Airlines	F94988 F93862
from $103 Find flight	09:57 Seattle Seattle-Tacoma Intl	18:36 Denver Denver International	7h 39m layover 3h 2m - Las Vegas	Frontier Airlines	F94830 F93844

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on April 24, 2025

Flight Schedule Seattle (Washington) to Denver (Colorado)

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	Flight Details	Flight Duration	Price
05:02 — 08:44	05:02 — 08:44 UA2269 United Airlines Seattle — Denver	2h 42m	Find flight from$110
08:12 — 11:53	08:12 — 11:53 AS682 Alaska Airlines Seattle — Denver	2h 41m	Find flight from$134
08:18 — 12:01	08:18 — 12:01 F93406 Frontier Airlines Seattle — Denver	2h 43m	Find flight from$36
08:55 — 12:43	08:55 — 12:43 DL2740 Delta Air Lines Inc. Seattle — Denver	2h 48m	Find flight from$137
09:00 — 12:43	09:00 — 12:43 UA1829 United Airlines Seattle — Denver	2h 43m	Find flight from$127
12:14 — 15:55	12:14 — 15:55 AS620 Alaska Airlines Seattle — Denver	2h 41m	Find flight from$168
12:30 — 16:14	12:30 — 16:14 UA431 United Airlines Seattle — Denver	2h 44m	Find flight from$207
12:34 — 16:12	12:34 — 16:12 AS602 Alaska Airlines Seattle — Denver	2h 38m	Find flight from$114
12:35 — 16:17	12:35 — 16:17 UA1483 United Airlines Seattle — Denver	2h 42m	Find flight from$153
12:46 — 16:31	12:46 — 16:31 UA423 United Airlines Seattle — Denver	2h 45m	Find flight from$279
15:18 — 19:00	15:18 — 19:00 UA757 United Airlines Seattle — Denver	2h 42m	Find flight from$153
15:18 — 18:56	15:18 — 18:56 AS710 Alaska Airlines Seattle — Denver	2h 38m	Find flight from$372
15:20 — 19:04	15:20 — 19:04 UA1476 United Airlines Seattle — Denver	2h 44m	Find flight from$127
15:21 — 18:59	15:21 — 18:59 AS524 Alaska Airlines Seattle — Denver	2h 38m	Find flight from$129
15:31 — 19:19	15:31 — 19:19 DL4094 Delta Air Lines Inc. Seattle — Denver	2h 48m	Find flight from$137
16:30 — 20:09	16:30 — 20:09 AS712 Alaska Airlines Seattle — Denver	2h 39m	Find flight from$138
18:00 — 21:44	18:00 — 21:44 UA1279 United Airlines Seattle — Denver	2h 44m	Find flight from$141
18:35 — 22:13	18:35 — 22:13 AS737 Alaska Airlines Seattle — Denver	2h 38m	Find flight from$122
18:59 — 22:36	18:59 — 22:36 AS321 Alaska Airlines Seattle — Denver	2h 37m	Find flight from$97
19:11 — 22:55	19:11 — 22:55 UA297 United Airlines Seattle — Denver	2h 44m	Find flight from$165
19:13 — 22:57	19:13 — 22:57 UA1387 United Airlines Seattle — Denver	2h 44m	Find flight from$168
19:50 — 23:31	19:50 — 23:31 DL2851 Delta Air Lines Inc. Seattle — Denver	2h 41m	Find flight from$125
20:24 — 23:59	20:24 — 23:59 AS427 Alaska Airlines Seattle — Denver	2h 35m	Find flight from$100
22:08 — 01:51 +1 day	22:08 — 01:51 F91176 Frontier Airlines Seattle — Denver	2h 43m	Find flight from$36
05:36 — 14:40	05:36 — 07:50 UA1954 United Airlines Seattle — San Francisco 3h 10m stop 11:00 — 14:40 UA1986 United Airlines San Francisco — Denver	8h 4m including layover	Find flight from$139
06:16 — 15:13	06:16 — 10:15 AA4864 American Airlines Seattle — Phoenix 3h 12m stop 13:27 — 15:13 AA2324 American Airlines Phoenix — Denver	7h 57m including layover	Find flight from$148
06:35 — 11:45	06:35 — 07:31 AS2111 Alaska Airlines Seattle — Portland 44m stop 09:40 — 13:10 AS336 Alaska Airlines Portland — Denver	4h 10m including layover	Find flight from$119
07:42 — 13:07	07:42 — 08:34 AS2180 Alaska Airlines Seattle — Portland 1h 1m stop 09:35 — 13:07 AS336 Alaska Airlines Portland — Denver	4h 25m including layover	Find flight from$122
09:57 — 18:36	13:40 — 16:20 F94830 Frontier Airlines Seattle — Las Vegas 3h 2m stop 15:38 — 18:36 F93844 Frontier Airlines Las Vegas — Denver	7h 39m including layover	Find flight from$103
09:57 — 00:49 +1 day	09:57 — 12:36 F94830 Frontier Airlines Seattle — Las Vegas 9h 17m stop 21:53 — 00:49 F94968 Frontier Airlines Las Vegas — Denver	13h 52m including layover	Find flight from$107
10:36 — 08:01 +1 day	09:57 — 13:05 F94988 Frontier Airlines Seattle — Salt Lake City 16h 38m stop 06:15 — 07:52 F93862 Frontier Airlines Salt Lake City — Denver	20h 25m including layover	Find flight from$90
10:36 — 12:25 +1 day	09:57 — 13:05 F94988 Frontier Airlines Seattle — Salt Lake City 21h 13m stop 10:45 — 12:22 F93982 Frontier Airlines Salt Lake City — Denver	24h 49m including layover	Find flight from$90
11:36 — 03:59 +1 day	11:36 — 14:11 F94204 Frontier Airlines Seattle — Las Vegas 10h 48m stop 00:59 — 03:59 F92430 Frontier Airlines Las Vegas — Denver	15h 23m including layover	Find flight from$91
11:40 — 19:21	11:40 — 15:45 AA5004 American Airlines Seattle — Phoenix 1h 45m stop 17:30 — 19:21 AA1309 American Airlines Phoenix — Denver	6h 41m including layover	Find flight from$148
12:07 — 18:40	14:55 — 17:32 F94830 Frontier Airlines Seattle — Las Vegas 53m stop 00:59 — 03:59 F92430 Frontier Airlines Las Vegas — Denver	5h 33m including layover	Find flight from$77
12:29 — 19:26	12:29 — 15:08 F93163 Frontier Airlines Seattle — Ontario 1h stop 16:08 — 19:26 F92908 Frontier Airlines Ontario — Denver	5h 57m including layover	Find flight from$70
13:55 — 22:17	13:55 — 16:12 UA1152 United Airlines Seattle — San Francisco 2h 28m stop 18:40 — 22:17 UA373 United Airlines San Francisco — Denver	7h 22m including layover	Find flight from$139
13:55 — 23:06	13:55 — 16:12 UA1152 United Airlines Seattle — San Francisco 3h 17m stop 19:29 — 23:06 UA589 United Airlines San Francisco — Denver	8h 11m including layover	Find flight from$139
14:00 — 21:52	14:00 — 16:17 UA375 United Airlines Seattle — San Francisco 1h 58m stop 18:15 — 21:52 UA297 United Airlines San Francisco — Denver	6h 52m including layover	Find flight from$165
14:00 — 22:47	14:00 — 16:17 UA375 United Airlines Seattle — San Francisco 2h 53m stop 19:10 — 22:47 UA589 United Airlines San Francisco — Denver	7h 47m including layover	Find flight from$165
16:35 — 23:33	19:28 — 22:08 F93163 Frontier Airlines Seattle — Ontario 1h stop 06:30 — 09:54 F91500 Frontier Airlines Ontario — Denver	5h 58m including layover	Find flight from$78
16:58 — 23:44	16:58 — 20:50 F93974 Frontier Airlines Seattle — Phoenix 1h stop 21:50 — 23:44 F92142 Frontier Airlines Phoenix — Denver	5h 46m including layover	Find flight from$70
17:21 — 07:53 +1 day	17:21 — 23:31 F94066 Frontier Airlines Seattle — Dallas 7h 2m stop 06:33 — 07:53 F93365 Frontier Airlines Dallas — Denver	13h 32m including layover	Find flight from$104
17:46 — 07:26 +1 day	17:46 — 23:39 F94066 Frontier Airlines Seattle — Dallas 6h 36m stop 06:15 — 07:26 F91323 Frontier Airlines Dallas — Denver	12h 40m including layover	Find flight from$107
19:51 — 12:09 +1 day	14:55 — 17:32 F94830 Frontier Airlines Seattle — Las Vegas 10h 26m stop 08:18 — 11:19 F92016 Frontier Airlines Las Vegas — Denver	15h 18m including layover	Find flight from$71
19:51 — 14:31 +1 day	14:55 — 17:32 F94830 Frontier Airlines Seattle — Las Vegas 12h 41m stop 11:00 — 14:06 F92350 Frontier Airlines Las Vegas — Denver	17h 40m including layover	Find flight from$104
21:52 — 07:51 +1 day	21:52 — 01:44 F93974 Frontier Airlines Seattle — Phoenix 4h 16m stop 06:00 — 07:51 F91376 Frontier Airlines Phoenix — Denver	8h 59m including layover	Find flight from$83
21:52 — 10:03 +1 day	21:52 — 01:44 F93974 Frontier Airlines Seattle — Phoenix 6h 21m stop 08:15 — 10:11 F94768 Frontier Airlines Phoenix — Denver	11h 11m including layover	Find flight from$83

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times - local. Updated on April 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 00:25 to 23:59 from 3 Seattle airports and arrive 00:25 to 23:59 to 2 Denver airports. Average flight time is 2h 42m.

The fastest flight 2h 35m
Average flight time 2h 42m
The earliest flight 00:25
The latest flight 23:59
Distance 1022 ml

The cheapest months to travel to Denver are november (from 36 $), december (from 70 $), february (from 73 $).

The most expensive months are january (from 78 $), february (from 73 $), december (from 70 $).

What is the lowest airfare Seattle to Denver?

The cheapest plane ticket found by our users is $36. This airfare is for economy class on one-way F91176 flight by Frontier Airlines for February 21, 2025 which leaves Seattle-Tacoma Intl in Seattle at 22:08 am and arrives at Denver Denver International at 01:51.

Economy class

$36

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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 9 regular airlines and 4 low-cost airlines. Most of the flights on this route are operated by Frontier Airlines - 28 departures per week at the price of from $ 36 . And the most expensive tickets are offered by American Airlines airline - from $ 1513.

Direct flights

There are 24 nonstop flights on the route. The fastest direct flight is AS427 by Alaska Airlines takes 2h 35m and the cheapest is F91176 by Frontier Airlines for $36.

F9 - Frontier Airlines

from $36

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DL - Delta Air Lines Inc.

from $125

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UA - United Airlines

from $110

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AS - Alaska Airlines

from $97

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See more direct flights

Connecting Flights

There are 460 flights with layovers on the route. The fastest connecting flight is AS2111 by Alaska Airlines takes 4h 10m and the cheapest is F91176 by Frontier Airlines for $70.

F9 - Frontier Airlines

from $70

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DL - Delta Air Lines Inc.

from $198

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UA - United Airlines

from $139

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AA - American Airlines

from $148

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AS - Alaska Airlines

from $119

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SY - Sun Country Airlines

from $142

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Y4 - Volaris

from $478

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AM - Aeromexico

from $1150

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NK - Spirit Airlines

from $210

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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 $36
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Kenmore Air Harbor SPB-LKE

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Denver airports

Denver International-DEN

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Arapahoe Co-APA

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Airplanes

There are flights to Denver from Seattle by 9 airlines that use 10 aircraft brands. They range from huge modern airplanes to small-sized.

Boeing 737-800

from $125

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Canadair Regional Jet 700

from $148

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Embraer 175 (short wing)

from $148

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Boeing 737-900

from $198

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Boeing 737 MAX 9

from $280

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Airbus A320

from $326

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Airbus A319

from $339

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Boeing 737 MAX 8

from $351

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Boeing 737

from $353

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Boeing 737-100/200

from $372

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Top Domestic Destinations from Seattle

You may also consider searching for discounted plane tickets to some other popular places from Seattle within United States.

Seattle — Washington D.C.

from $78

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Seattle — Las Vegas

from $62

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Seattle — New York

from $180

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Seattle — Chicago

from $73

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Seattle — Phoenix

from $67

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Seattle — San Diego

from $74

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Seattle — Los Angeles

from $53

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Seattle — Denver

from $243

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Seattle — Dallas

from $72

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Seattle — Boston

from $63

Find

Top International Destinations from Seattle

Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.

Seattle — Tokyo

from $77

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Seattle — London

from $70

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Seattle — Vancouver

from $57

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Seattle — Cancun

from $63

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Seattle — Paris

from $66

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Seattle — Toronto

from $64

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Seattle — Calgary

from $76

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Seattle — Mumbai

from $80

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Seattle — Montreal

from $68

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Seattle — Amsterdam

from $64

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How to book a plane 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.