Cheap Flights from Seattle, WA to Denver, CO from $51

One way Round trip

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On Cheapflightsplus.com you will find 37 direct and 233 connecting flights from Seattle to Denver. You can compare airfare deals from 7 airlines and multiple travel sites from $51, 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: $51 (one-way), $87 (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 $51. The fastest direct flight takes 2h 40m and the fastest connecting – 4h 11m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $51 Find flight	12:30 Seattle Seattle-Tacoma Intl	16:15 Denver Denver International	2h 45m	Sun Country Airlines	SY1698
from $52 Find flight	06:25 Seattle Seattle-Tacoma Intl	10:12 Denver Denver International	2h 47m	Frontier Airlines	F93406
from $76 Find flight	16:59 Seattle Seattle-Tacoma Intl	20:47 Denver Denver International	2h 48m	Frontier Airlines	F91176
from $82 Find flight	20:17 Seattle Seattle-Tacoma Intl	23:59 Denver Denver International	2h 42m	Hawaiian Airlines	HA6652
from $82 Find flight	17:59 Seattle Seattle-Tacoma Intl	21:46 Denver Denver International	2h 47m	Hawaiian Airlines	HA6654
from $85 Find flight	17:59 Seattle Seattle-Tacoma Intl	21:46 Denver Denver International	2h 47m	Alaska Airlines	AS1163
from $86 Find flight	20:17 Seattle Seattle-Tacoma Intl	23:59 Denver Denver International	2h 42m	Alaska Airlines	AS642
from $103 Find flight	15:00 Seattle Seattle-Tacoma Intl	18:54 Denver Denver International	2h 54m	Frontier Airlines	F94546
from $111 Find flight	19:00 Seattle Seattle-Tacoma Intl	22:40 Denver Denver International	2h 40m	United Airlines	UA1218
from $126 Find flight	13:09 Seattle Seattle-Tacoma Intl	16:49 Denver Denver International	2h 40m	Hawaiian Airlines	HA6651
from $129 Find flight	13:09 Seattle Seattle-Tacoma Intl	16:49 Denver Denver International	2h 40m	Alaska Airlines	AS602
from $133 Find flight	11:04 Seattle Seattle-Tacoma Intl	14:51 Denver Denver International	2h 47m	United Airlines	UA1049
from $72 Find flight	13:50 Seattle Seattle-Tacoma Intl	20:42 Denver Denver International	5h 52m layover 0h 51m - Ontario	Frontier Airlines	F93163 F92908
from $102 Find flight	15:11 Seattle Seattle-Tacoma Intl	23:08 Denver Denver International	6h 57m layover 2h 10m - Las Vegas	Frontier Airlines	F94830 F94612
from $108 Find flight	14:59 Seattle Seattle-Tacoma Intl	23:47 Denver Denver International	7h 48m layover 2h 32m - San Diego	Hawaiian Airlines	HA6885 HA6403
from $109 Find flight	09:44 Seattle Seattle-Tacoma Intl	23:52 Denver Denver International	13h 8m layover 6h 52m - Dallas	Frontier Airlines	F94066 F94069

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on August 15, 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
05:07 — 08:48	05:07 — 08:48 UA2269 United Airlines Seattle — Denver	2h 41m	Find flight from$111
06:25 — 10:12	06:25 — 10:12 F93406 Frontier Airlines Seattle — Denver	2h 47m	Find flight from$52
08:06 — 11:53	08:06 — 11:53 AS682 Alaska Airlines Seattle — Denver	2h 47m	Find flight from$195
08:18 — 12:00	08:18 — 12:00 HA6653 Hawaiian Airlines Seattle — Denver	2h 42m	Find flight from$158
08:18 — 12:00	08:18 — 12:00 AS425 Alaska Airlines Seattle — Denver	2h 42m	Find flight from$159
08:18 — 12:00	08:18 — 12:00 HA6555 Hawaiian Airlines Seattle — Denver	2h 42m	Find flight from$170
08:45 — 12:28	08:45 — 12:28 UA1505 United Airlines Seattle — Denver	2h 43m	Find flight from$111
08:57 — 12:43	08:57 — 12:43 UA1359 United Airlines Seattle — Denver	2h 46m	Find flight from$145
08:58 — 12:44	08:58 — 12:44 UA617 United Airlines Seattle — Denver	2h 46m	Find flight from$157
10:15 — 13:58	10:15 — 13:58 HA6649 Hawaiian Airlines Seattle — Denver	2h 43m	Find flight from$158
10:15 — 13:58	10:15 — 13:58 AS424 Alaska Airlines Seattle — Denver	2h 43m	Find flight from$162
10:20 — 14:07	10:20 — 14:07 AS535 Alaska Airlines Seattle — Denver	2h 47m	Find flight from$195
10:50 — 14:36	10:50 — 14:36 UA1061 United Airlines Seattle — Denver	2h 46m	Find flight from$157
11:04 — 14:51	11:04 — 14:51 UA1049 United Airlines Seattle — Denver	2h 47m	Find flight from$133
12:30 — 16:15	12:30 — 16:15 SY1698 Sun Country Airlines Seattle — Denver	2h 45m	Find flight from$51
12:43 — 16:30	12:43 — 16:30 UA1969 United Airlines Seattle — Denver	2h 47m	Find flight from$133
12:43 — 16:30	12:43 — 16:30 UA1417 United Airlines Seattle — Denver	2h 47m	Find flight from$142
13:09 — 16:49	13:09 — 16:49 HA6651 Hawaiian Airlines Seattle — Denver	2h 40m	Find flight from$126
13:09 — 16:49	13:09 — 16:49 AS602 Alaska Airlines Seattle — Denver	2h 40m	Find flight from$129
13:13 — 16:54	13:13 — 16:54 AS620 Alaska Airlines Seattle — Denver	2h 41m	Find flight from$195
14:24 — 18:15	14:24 — 18:15 UA2859 United Airlines Seattle — Denver	2h 51m	Find flight from$146
14:30 — 18:20	14:30 — 18:20 UA1733 United Airlines Seattle — Denver	2h 50m	Find flight from$156
15:00 — 18:54	15:00 — 18:54 F94546 Frontier Airlines Seattle — Denver	2h 54m	Find flight from$103
15:35 — 19:27	15:35 — 19:27 UA1476 United Airlines Seattle — Denver	2h 52m	Find flight from$156
15:45 — 19:29	15:45 — 19:29 UA757 United Airlines Seattle — Denver	2h 44m	Find flight from$112
15:49 — 19:32	15:49 — 19:32 HA6650 Hawaiian Airlines Seattle — Denver	2h 43m	Find flight from$159
16:59 — 20:47	16:59 — 20:47 F91176 Frontier Airlines Seattle — Denver	2h 48m	Find flight from$76
17:55 — 21:38	17:55 — 21:38 AS524 Alaska Airlines Seattle — Denver	2h 43m	Find flight from$159
17:59 — 21:46	17:59 — 21:46 HA6654 Hawaiian Airlines Seattle — Denver	2h 47m	Find flight from$82
17:59 — 21:46	17:59 — 21:46 AS1163 Alaska Airlines Seattle — Denver	2h 47m	Find flight from$85
19:00 — 22:40	19:00 — 22:40 UA1218 United Airlines Seattle — Denver	2h 40m	Find flight from$111
20:17 — 23:59	20:17 — 23:59 HA6652 Hawaiian Airlines Seattle — Denver	2h 42m	Find flight from$82
20:17 — 23:59	20:17 — 23:59 AS642 Alaska Airlines Seattle — Denver	2h 42m	Find flight from$86
20:23 — 00:05 +1 day	20:23 — 00:05 HA6455 Hawaiian Airlines Seattle — Denver	2h 42m	Find flight from$126
20:23 — 00:05 +1 day	20:23 — 00:05 AS321 Alaska Airlines Seattle — Denver	2h 42m	Find flight from$129
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	Find flight from$148
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	Find flight from$109
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	Find flight from$119
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	Find flight from$72
13:50 — 20:45	13:50 — 16:26 F93163 Frontier Airlines Seattle — Ontario 55m stop 17:21 — 20:45 F91262 Frontier Airlines Ontario — Denver	5h 55m including layover	Find flight from$103
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	Find flight from$109
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	Find flight from$108
15:11 — 23:08	14:55 — 17:32 F94830 Frontier Airlines Seattle — Las Vegas 2h 10m stop 20:33 — 23:36 F94612 Frontier Airlines Las Vegas — Denver	6h 57m including layover	Find flight from$102
16:31 — 08:55 +1 day	16:29 — 19:36 F94988 Frontier Airlines Seattle — Salt Lake City 11h 44m stop 07:45 — 09:25 F93862 Frontier Airlines Salt Lake City — Denver	15h 24m including layover	Find flight from$113
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$142

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

*Departure and arrival times - local. Updated on August 15, 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 45m.

The fastest flight 2h 40m
Average flight time 2h 45m
The earliest flight 00:20
The latest flight 23:59
Distance 1022 ml

The cheapest months to travel to Denver are may (from 51 $), june (from 52 $), december (from 72 $).

The most expensive months are november (from 230 $), february (from 108 $), october (from 85 $).

What is the lowest airfare Seattle to Denver?

The cheapest plane ticket found by our users is $51. This airfare is for economy class on one-way SY1698 flight by Sun Country Airlines for May 30, 2025 which leaves Seattle-Tacoma Intl in Seattle at 12:30 am and arrives at Denver Denver International at 16:15.

Economy class

$51

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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 - 22 departures per week at the price of from $ 52 . And the most expensive tickets are offered by Turkish Airlines airline - from $ 1661.

Direct flights

There are 37 nonstop flights on the route. The fastest direct flight is UA1218 by United Airlines takes 2h 40m and the cheapest is SY1698 by Sun Country Airlines for $51.

F9 - Frontier Airlines

from $52

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UA - United Airlines

from $111

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AS - Alaska Airlines

from $85

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SY - Sun Country Airlines

from $51

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HA - Hawaiian Airlines

from $82

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Connecting Flights

There are 233 flights with layovers on the route. The fastest connecting flight is HA6826 by Hawaiian Airlines takes 4h 11m and the cheapest is SY1698 by Sun Country Airlines for $72.

F9 - Frontier Airlines

from $72

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UA - United Airlines

from $148

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AS - Alaska Airlines

from $118

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SY - Sun Country Airlines

from $141

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TK - Turkish Airlines

from $1661

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HA - Hawaiian Airlines

from $108

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NK - Spirit Airlines

from $144

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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 $51
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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 7 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.

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

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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.
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