Cheap flights from Denver to Seattle (DEN - SEA) - Compare and Save
DEN — SEA
May 2 — May 91
Round-trip
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Seattle/Tacoma Intl are usually found in January or February, booked 68 days in advance, depart on a Friday or Thursday and return on a Friday
Cheap 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 April 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $93 (Cheapflightsfares) |
One-way from | $62 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $203 |
Good round-trip deal | $188 or less |
Good one-way deal | $142 or less |
Find flight deals from Denver to Seattle
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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 April 2, 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 April 2, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 4/1. 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 4/217:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 4/217:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 4/1![Frontier logo]()
$93
This iWofly deal was found by Cheapflights users on 3/31. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/31![Frontier logo]()
$95
This Super.com deal was found by Cheapflights users on 3/29. 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.
Sat 4/187:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sat 4/257:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/29![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 4/287:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/31![Frontier logo]()
$98
This iWofly deal was found by Cheapflights users on 3/30. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/30![Frontier logo]()
$100
This iWofly deal was found by Cheapflights users on 4/1. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/1![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/127:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/31![Frontier logo]()
$102
This Frontier deal was found by Cheapflights users on 3/30. 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 5/57:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Wed 5/67:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/30![Frontier logo]()
$103
This Super.com deal was found by Cheapflights users on 3/28. 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 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 4/287:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/28![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 3/30. 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 4/287:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sat 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/30![Frontier logo]()
$108
This Frontier deal was found by Cheapflights users on 4/1. 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 4/217:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sun 4/267:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 4/1![Frontier logo]()
$109
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 4/217:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sun 4/267:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/30![Frontier logo]()
$112
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 April 2, 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 April 2, 2026.
This Delta deal was found by Cheapflights users on 4/1. 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.
Thu 4/237:45 pm
DEN
- SEA
Nonstop3h 20m
Delta
Tue 4/282:11 pm
SEA
- DEN
Nonstop2h 59m
Delta
Deal found 4/1![Delta logo]()
$227
This Southwest deal was found by Cheapflights users on 3/28. 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 4/223:35 pm
DEN
- SEA
1 stop8h 20m
Southwest
Tue 4/286:50 am
SEA
- DEN
2 stops7h 15m
Southwest
Deal found 3/28![Southwest logo]()
$242
This Alaska Airlines deal was found by Cheapflights users on 4/1. 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.
Sat 5/162:19 pm
DEN
- SEA
1 stop7h 09m
Alaska Airlines
Mon 5/181:13 pm
SEA
- DEN
Nonstop2h 49m
Alaska Airlines
Deal found 4/1![Alaska Airlines logo]()
$276
This Southwest deal was found by Cheapflights users on 3/28. 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 5/67:35 am
DEN
- SEA
1 stop7h 00m
Southwest
Thu 5/79:40 am
SEA
- DEN
2 stops7h 25m
Southwest
Deal found 3/28![Southwest logo]()
$252
This Southwest deal was found by Cheapflights users on 4/1. 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 5/14:00 pm
DEN
- SEA
2 stops7h 30m
Southwest
Fri 5/85:00 am
SEA
- DEN
1 stop8h 00m
Southwest
Deal found 4/1![Southwest logo]()
$262
This Delta deal was found by Cheapflights users on 3/29. 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.
Fri 4/175:30 am
DEN
- SEA
1 stop4h 45m
Delta
Sun 4/198:00 pm
SEA
- DEN
Nonstop2h 50m
Delta
Deal found 3/29![Delta logo]()
$307
This Southwest deal was found by Cheapflights users on 4/1. 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 5/14:00 pm
DEN
- SEA
2 stops7h 30m
Southwest
Fri 5/89:40 am
SEA
- DEN
2 stops8h 20m
Southwest
Deal found 4/1![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 3/28. 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.
Wed 9/26:45 am
DEN
- SEA
Nonstop3h 08m
Delta
Sun 9/137:40 pm
SEA
- DEN
Nonstop2h 50m
Delta
Deal found 3/28![Delta logo]()
$316
This Delta deal was found by Cheapflights users on 3/29. 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.
Wed 9/26:45 am
DEN
- SEA
Nonstop3h 08m
Delta
Sun 9/137:40 pm
SEA
- DEN
Nonstop2h 50m
Delta
Deal found 3/29![Delta logo]()
$316
This Southwest deal was found by Cheapflights users on 3/29. 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 4/211:45 pm
DEN
- SEA
2 stops10h 10m
Southwest
Thu 4/237:20 am
SEA
- DEN
2 stops9h 10m
Southwest
Deal found 3/29![Southwest logo]()
$297
This Southwest deal was found by Cheapflights users on 4/1. 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.
Mon 4/206:40 am
DEN
- SEA
1 stop6h 35m
Southwest
Fri 4/247:20 am
SEA
- DEN
2 stops9h 10m
Southwest
Deal found 4/1![Southwest logo]()
$297
This Southwest deal was found by Cheapflights users on 3/30. 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 5/143:50 pm
DEN
- SEA
1 stop7h 45m
Southwest
Thu 5/2111:05 am
SEA
- DEN
1 stop6h 55m
Southwest
Deal found 3/30![Southwest logo]()
$302
Last-minute flights from Denver to SeattleDiscover last-minute flight deals from Denver to Seattle. Data last updated April 2, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Seattle. Data last updated April 2, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 3/29. 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.
Sat 4/187:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sat 4/257:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/29![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 4/1. 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 4/217:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 4/217:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 4/1![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 4/1. 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 4/217:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sun 4/267:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 4/1![Frontier logo]()
$109
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 4/217:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sun 4/267:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/30![Frontier logo]()
$112
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 4/287:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/31![Frontier logo]()
$98
This Super.com deal was found by Cheapflights users on 3/28. 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 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 4/287:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/28![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 3/30. 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 4/287:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sat 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/30![Frontier logo]()
$108
This iWofly deal was found by Cheapflights users on 3/31. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/31![Frontier logo]()
$95
This iWofly deal was found by Cheapflights users on 3/30. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/30![Frontier logo]()
$100
This iWofly deal was found by Cheapflights users on 4/1. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/1![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/127:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/31![Frontier logo]()
$102
This Frontier deal was found by Cheapflights users on 3/30. 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 5/57:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Wed 5/67:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/30![Frontier logo]()
$103
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 April 2, 2026.
Search for one-way flight options from Denver to Seattle. Find affordable one-way fares based on user searches. Data last updated April 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 5/197:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 3/30![Frontier logo]()
$62
This Super.com deal was found by Cheapflights users on 3/30. 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 4/237:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/30![Frontier logo]()
$63
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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 5/37:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/31![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Wed 4/227:05 pm
DEN
- SEA
1 stop25h 46m
Frontier
Deal found 3/31![Frontier logo]()
$65
This Trip.com deal was found by Cheapflights users on 4/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/147:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/1![Frontier logo]()
$67
This Priceline deal was found by Cheapflights users on 3/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 3/29![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 5/17:40 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/1![Frontier logo]()
$72
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/3010:29 pm
DEN
- SEA
1 stop23h 22m
Frontier
Deal found 3/30![Frontier logo]()
$78
This Super.com deal was found by Cheapflights users on 4/1. 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.
Sat 4/259:49 am
DEN
- SEA
1 stop8h 53m
Frontier
Deal found 4/1![Frontier logo]()
$79
This Trip.com deal was found by Cheapflights users on 3/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 3/30![Frontier logo]()
$82
This Super.com deal was found by Cheapflights users on 3/31. 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 5/147:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 3/31![Frontier logo]()
$83
This Frontier deal was found by Cheapflights users on 3/28. 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 5/147:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 3/28![Frontier logo]()
$84
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 April 2, 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
Thu 4/23
7:45 pm-10:05 pm
Nonstop3h 20m
Seattle/Tacoma Intl
Tue 4/28
2:11 pm-6:10 pm
Nonstop2h 59m
$227
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Wed 4/22
3:35 pm-10:55 pm
1 stop8h 20m
Seattle/Tacoma Intl
Tue 4/28
6:50 am-3:05 pm
2 stops7h 15m
$242
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Wed 5/6
7:35 am-1:35 pm
1 stop7h 00m
Seattle/Tacoma Intl
Thu 5/7
9:40 am-6:05 pm
2 stops7h 25m
$252
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Fri 5/1
4:00 pm-10:30 pm
2 stops7h 30m
Seattle/Tacoma Intl
Fri 5/8
5:00 am-2:00 pm
1 stop8h 00m
$262
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Fri 5/1
4:00 pm-10:30 pm
2 stops7h 30m
Seattle/Tacoma Intl
Fri 5/8
9:40 am-7:00 pm
2 stops8h 20m
$267
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Sat 5/16
2:19 pm-8:28 pm
1 stop7h 09m
Seattle/Tacoma Intl
Mon 5/18
1:13 pm-5:02 pm
Nonstop2h 49m
$276
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Tue 4/21
1:45 pm-10:55 pm
2 stops10h 10m
Seattle/Tacoma Intl
Thu 4/23
7:20 am-5:30 pm
2 stops9h 10m
$297
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Mon 4/20
6:40 am-12:15 pm
1 stop6h 35m
Seattle/Tacoma Intl
Fri 4/24
7:20 am-5:30 pm
2 stops9h 10m
$297
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Thu 5/14
3:50 pm-10:35 pm
1 stop7h 45m
Seattle/Tacoma Intl
Thu 5/21
11:05 am-7:00 pm
1 stop6h 55m
$302
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Fri 4/17
5:30 am-9:15 am
1 stop4h 45m
Seattle/Tacoma Intl
Sun 4/19
8:00 pm-11:50 pm
Nonstop2h 50m
$307
Showing 1-10 of 24 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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | 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 | |
| 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?
Use this chart to determine the optimal time to book a round-trip flight from Denver to Seattle. Price data was last updated on April 2, 2026.
To ensure you get the cheapest price possible for a flight from Denver to Seattle, you should look to book at least 39 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, November is the cheapest month in which you can book a flight from Denver to Seattle (average of $54). Flying from Denver to Seattle in July is currently the most expensive (average of $119). 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 April 2, 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 22% 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 March 28, 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. Sunday at noon 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 20% of weekly flights between Denver and Seattle have experienced delays in the past year, with the average delay time being 144 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?
Wednesday 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 13% of flights being delayed.
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 April 2, 2026.
See what other customers who have flown with Alaska Airlines,Delta, andHawaiian Airlines 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.
Boarding
8.1
Crew
8.5
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Crew
8.5
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Crew
8.5
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Crew
8.5
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Crew
8.5
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Boarding
8.1
Crew
8.5
Overall
7.9
Food
7.0
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - 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
Ocean Shores
Olympia
Kent
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tukwila
Renton
Puyallup
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline
Aberdeen
Browse thousands of different options on Cheapflights for your next 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 April 2, 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 April 2, 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 April 2, 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 April 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$55 | Average$165 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$218 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$104 | Average$228 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$116 | Average$284 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$117 | Average$263 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$126 | Average$271 | FlexibilityNo cancel fee | On-time75% |