$111+ Cheap flights from Denver to Seattle (DEN - SEA)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
Jul 21 — Jul 281
Round-trip
1 adult, Economy
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Find cheap flights from Denver to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Denver Intl to Seattle/Tacoma Intl are usually found in January or February, booked 27 days in advance, depart on a Friday or Thursday and return on a Friday
Cheap flight deals from Denver to Seattle
Cheapest
Best
Last-minute
One-way
Cheapest flights from Denver to SeattleExplore the most affordable flight options available from Denver to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 21, 2026.
Explore the most affordable flight options available from Denver to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 21, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/187:45 am
DEN
- SEA
Nonstop3h 06m
Frontier
Fri 9/257:00 am
SEA
- DEN
Nonstop2h 51m
Frontier
Deal found 6/16![Frontier logo]()
$173
This Cheapflightsfares deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/510:29 pm
DEN
- SEA
Nonstop2h 58m
Frontier
Fri 10/97:41 pm
SEA
- DEN
Nonstop2h 53m
Frontier
Deal found 6/15![Frontier logo]()
$175
This Cheapflightsfares deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Fri 8/213:19 pm
SEA
- DEN
Nonstop2h 48m
Frontier
Deal found 6/16![Frontier logo]()
$176
This Frontier deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2110:29 pm
DEN
- SEA
Nonstop2h 58m
Frontier
Thu 9/247:41 pm
SEA
- DEN
Nonstop2h 53m
Frontier
Deal found 6/16![Frontier logo]()
$177
This deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/69:13 am
DEN
- SEA
Nonstop3h 07m
Frontier
Mon 7/137:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/16![Frontier logo]()
$179
This Cheapflightsfares deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:29 pm
DEN
- SEA
Nonstop2h 58m
Frontier
Mon 9/217:41 pm
SEA
- DEN
Nonstop2h 53m
Frontier
Deal found 6/20![Frontier logo]()
$180
This Super.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Tue 8/187:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/20![Frontier logo]()
$181
This Cheapflightsfares deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Tue 8/187:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/19![Frontier logo]()
$182
This Frontier deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Wed 9/167:00 am
SEA
- DEN
Nonstop2h 51m
Frontier
Deal found 6/16![Frontier logo]()
$183
This Frontier deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Sat 8/227:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/19![Frontier logo]()
$184
This Cheapflightsfares deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:10 am
DEN
- SEA
Nonstop3h 10m
Frontier
Sat 8/297:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/18![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:17 pm
DEN
- SEA
1 stop7h 09m
Frontier
Wed 10/217:41 pm
SEA
- DEN
Nonstop2h 53m
Frontier
Deal found 6/19![Frontier logo]()
$186
Best flights from Denver to SeattleDiscover carefully curated flight deals from Denver to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 21, 2026.
Discover carefully curated flight deals from Denver to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 21, 2026.
This Alaska Airlines deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:17 am
DEN
- SEA
1 stop7h 22m
Alaska Airlines
Wed 8/262:18 pm
SEA
- DEN
1 stop5h 55m
Alaska Airlines
Deal found 6/20![Alaska Airlines logo]()
$322
This Southwest deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/14:10 pm
DEN
- SEA
2 stops8h 05m
Southwest
Tue 8/45:55 am
SEA
- DEN
2 stops7h 15m
Southwest
Deal found 6/18![Southwest logo]()
$335
This Delta deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:41 am
DEN
- SEA
1 stop8h 09m
Delta
Sat 8/2212:36 pm
SEA
- DEN
1 stop8h 13m
Delta
Deal found 6/17![Delta logo]()
$345
This Alaska Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2411:33 am
DEN
- SEA
1 stop6h 08m
Alaska Airlines
Fri 11/279:55 am
SEA
- DEN
1 stop7h 17m
Alaska Airlines
Deal found 6/16![Alaska Airlines logo]()
$346
This Southwest deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/169:00 am
DEN
- SEA
1 stop4h 55m
Southwest
Tue 7/217:30 am
SEA
- DEN
2 stops8h 40m
Southwest
Deal found 6/16![Southwest logo]()
$346
This Southwest deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/52:40 pm
DEN
- SEA
2 stops7h 35m
Southwest
Fri 8/77:00 am
SEA
- DEN
1 stop5h 20m
Southwest
Deal found 6/20![Southwest logo]()
$348
This Southwest deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/114:10 pm
DEN
- SEA
2 stops8h 05m
Southwest
Tue 7/145:40 am
SEA
- DEN
1 stop7h 15m
Southwest
Deal found 6/19![Southwest logo]()
$348
This Southwest deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:50 am
DEN
- SEA
1 stop9h 10m
Southwest
Fri 10/235:20 am
SEA
- DEN
2 stops6h 50m
Southwest
Deal found 6/19![Southwest logo]()
$348
This Southwest deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/254:10 pm
DEN
- SEA
2 stops8h 05m
Southwest
Mon 7/275:35 pm
SEA
- DEN
1 stop6h 10m
Southwest
Deal found 6/17![Southwest logo]()
$350
This Southwest deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:30 pm
DEN
- SEA
2 stops7h 05m
Southwest
Mon 8/35:00 am
SEA
- DEN
1 stop7h 35m
Southwest
Deal found 6/16![Southwest logo]()
$350
This Southwest deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:05 am
DEN
- SEA
1 stop5h 45m
Southwest
Sat 8/1510:50 am
SEA
- DEN
2 stops6h 45m
Southwest
Deal found 6/16![Southwest logo]()
$351
This Southwest deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/241:25 pm
DEN
- SEA
2 stops7h 05m
Southwest
Tue 7/287:30 am
SEA
- DEN
2 stops7h 20m
Southwest
Deal found 6/18![Southwest logo]()
$353
Last-minute flights from Denver to SeattleDiscover last-minute flight deals from Denver to Seattle. Data last updated June 21, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Seattle. Data last updated June 21, 2026 and is based on user searches.
This deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/69:13 am
DEN
- SEA
Nonstop3h 07m
Frontier
Mon 7/137:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/16![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/159:13 am
DEN
- SEA
Nonstop3h 07m
Frontier
Wed 7/2912:35 pm
SEA
- DEN
Nonstop3h 05m
Frontier
Deal found 6/20![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Tue 7/217:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/20![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Sat 7/187:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/18![Frontier logo]()
$195
This Frontier deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Wed 7/2912:35 pm
SEA
- DEN
Nonstop3h 05m
Frontier
Deal found 6/18![Frontier logo]()
$196
This Super.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:13 am
DEN
- SEA
Nonstop3h 07m
Frontier
Tue 8/47:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/18![Frontier logo]()
$192
This Mytrip deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:13 am
DEN
- SEA
Nonstop3h 07m
Frontier
Wed 7/2912:35 pm
SEA
- DEN
Nonstop3h 05m
Frontier
Deal found 6/16![Frontier logo]()
$197
This Cheapflightsfares deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/257:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Tue 8/47:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/20![Frontier logo]()
$188
This Cheapflightsfares deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:13 am
DEN
- SEA
Nonstop3h 07m
Frontier
Wed 7/2912:35 pm
SEA
- DEN
Nonstop3h 05m
Frontier
Deal found 6/19![Frontier logo]()
$194
This Super.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/297:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Tue 8/47:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/21![Frontier logo]()
$187
One-way flights from Denver to SeattleSearch for one-way flight options from Denver to Seattle. Find affordable one-way fares based on user searches. Data last updated June 21, 2026.
Search for one-way flight options from Denver to Seattle. Find affordable one-way fares based on user searches. Data last updated June 21, 2026.
This Frontier deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:25 am
DEN
- SEA
1 stop11h 26m
Frontier
Deal found 6/16![Frontier logo]()
$111
This Cheapflightsfares deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/187:45 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 6/15![Frontier logo]()
$114
This Super.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 6/17![Frontier logo]()
$115
This Cheapflightsfares deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/20![Frontier logo]()
$116
This Cheapflightsfares deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/20![Frontier logo]()
$117
This Expedia deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/20![Frontier logo]()
$118
This Frontier deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/20![Frontier logo]()
$119
This Cheapflightsfares deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:00 pm
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/15![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/167:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/17![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2310:39 pm
DEN
- SEA
1 stop20h 12m
Frontier
Deal found 6/17![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/147:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/18![Frontier logo]()
$127
Find flight deals from Denver to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $173 (Cheapflightsfares) |
One-way from | $111 (Frontier) |
Popular in | June |
Cheapest in | January |
Average price | $299 |
Good round-trip deal | $293 or less |
Good one-way deal | $170 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Denver to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 21, 2026.
Use the filters below to find and compare flights from Denver to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Tue 8/25
6:17 am-12:39 pm
1 stop7h 22m
Seattle/Tacoma Intl
Wed 8/26
2:18 pm-9:13 pm
1 stop5h 55m
$322
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Sat 8/1
4:10 pm-11:15 pm
2 stops8h 05m
Seattle/Tacoma Intl
Tue 8/4
5:55 am-2:10 pm
2 stops7h 15m
$335
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Sat 8/15
7:41 am-2:50 pm
1 stop8h 09m
Seattle/Tacoma Intl
Sat 8/22
12:36 pm-9:49 pm
1 stop8h 13m
$345
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Tue 11/24
11:33 am-4:41 pm
1 stop6h 08m
Seattle/Tacoma Intl
Fri 11/27
9:55 am-6:12 pm
1 stop7h 17m
$346
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Thu 7/16
9:00 am-12:55 pm
1 stop4h 55m
Seattle/Tacoma Intl
Tue 7/21
7:30 am-5:10 pm
2 stops8h 40m
$346
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Wed 8/5
2:40 pm-9:15 pm
2 stops7h 35m
Seattle/Tacoma Intl
Fri 8/7
7:00 am-1:20 pm
1 stop5h 20m
$348
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Sat 7/11
4:10 pm-11:15 pm
2 stops8h 05m
Seattle/Tacoma Intl
Tue 7/14
5:40 am-1:55 pm
1 stop7h 15m
$348
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Tue 10/20
10:50 am-7:00 pm
1 stop9h 10m
Seattle/Tacoma Intl
Fri 10/23
5:20 am-1:10 pm
2 stops6h 50m
$348
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Sat 7/25
4:10 pm-11:15 pm
2 stops8h 05m
Seattle/Tacoma Intl
Mon 7/27
5:35 pm-12:45 am
1 stop6h 10m
$350
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Wed 7/29
5:30 pm-11:35 pm
2 stops7h 05m
Seattle/Tacoma Intl
Mon 8/3
5:00 am-1:35 pm
1 stop7h 35m
$350
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Denver to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Seattle in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Denver-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Denver-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Denver to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Denver with our price prediction graph.
DEN-SEA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Denver to Seattle
Prices
Airlines
Delays
How far ahead should I book a flight from Denver to Seattle?
To ensure you get the cheapest price possible for a flight from Denver to Seattle, you should look to book at least 46 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Denver to Seattle?
Currently, January is the cheapest month in which you can book a flight from Denver to Seattle (average of $139). Flying from Denver to Seattle in June is currently the most expensive (average of $308). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from DEN to SEA?
Find hourly flight availability from Denver to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 21, 2026.
When flying from Denver to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 20% versus a flight at noon.
What is the cheapest day to fly from Denver to Seattle?
Use this chart to determine the cheapest time to fly round-trip from Denver to Seattle. Price data was last updated on June 20, 2026.
Travelers seeking maximum savings on their Denver to Seattle flight should consider departing on Friday evenings when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from Denver to Seattle delayed?
About 19% of weekly flights between Denver and Seattle have experienced delays in the past year, with the average delay time being 141 minutes.
What is the most punctual flight time for Denver to Seattle flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Denver to Seattle flights?
Over the last year, United Airlines have had the lowest number of delays on this route, with just 14% of flights being delayed.
The best insider tips for Denver to Seattle flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to Seattle trip
Our travel experts
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated June 21, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, andDelta from Denver to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Comfort
7.8
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Comfort
7.8
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Comfort
7.8
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Comfort
7.8
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Comfort
7.8
Overall
7.9
Food
7.1
Boarding
8.1
Entertainment
7.0
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Related info for your journey
Find useful and relevant information for your journey from Denver to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Shoreline
Marysville
Browse thousands of different options on Cheapflights for your next trip
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Complete your trip
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Search flights from Denver to Seattle by cabin class
Find flights from Denver to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Denver and Seattle flights
Browse other Denver and Seattle flight options. Last updated on June 21, 2026.
Other flights from Denver
Browse through other flights departing from Denver. Flights are based on user searches made on Cheapflights and were last updated on June 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 21, 2026.
Top 6 airlines flying from Denver to Seattle
Discover the top 6 airlines that operate flights from Denver to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$55 | Average$183 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$82 | Average$220 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$88 | Average$220 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$116 | Average$307 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$117 | Average$285 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$126 | Average$294 | FlexibilityNo cancel fee | On-time75% |