$94+ Cheap flights from Seattle to Denver (SEA - DEN)
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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Sep 9 — Sep 161
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Seattle to Denver 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 Seattle/Tacoma Intl to Denver Intl are usually found in January or October, booked 74 days in advance, depart on a Friday or Saturday and return on a Friday
Cheap flight deals from Seattle to Denver
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to DenverExplore the most affordable flight options available from Seattle to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
Explore the most affordable flight options available from Seattle to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
This Super.com deal was found by Cheapflights users on 8/5. 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.
Mon 8/247:06 pm -
Nonstop2h 52m
Thu 8/277:15 am -
Nonstop3h 04m
Deal found 8/5![Frontier logo]()
$136
This Frontier deal was found by Cheapflights users on 8/5. 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 8/257:06 pm -
Nonstop2h 52m
Wed 8/267:15 am -
Nonstop3h 04m
Deal found 8/5![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Mon 11/97:41 pm -
Nonstop2h 53m
Sat 11/147:45 am -
Nonstop3h 06m
Deal found 8/9![Frontier logo]()
$140
This Super.com deal was found by Cheapflights users on 8/6. 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 9/234:27 pm -
Nonstop2h 54m
Tue 9/291:07 pm -
Nonstop3h 01m
Deal found 8/6![Frontier logo]()
$141
This Super.com deal was found by Cheapflights users on 8/6. 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.
Mon 9/214:27 pm -
Nonstop2h 54m
Wed 9/231:07 pm -
Nonstop3h 01m
Deal found 8/6![Frontier logo]()
$142
This deal was found by Cheapflights users on 8/6. 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.
Wed 9/164:27 pm -
Nonstop2h 54m
Tue 9/221:07 pm -
Nonstop3h 01m
Deal found 8/6![Frontier logo]()
$143
This Frontier deal was found by Cheapflights users on 8/7. 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.
Sat 10/177:41 pm -
Nonstop2h 53m
Tue 10/277:45 am -
Nonstop3h 06m
Deal found 8/7![Frontier logo]()
$144
This Cheapflightsfares deal was found by Cheapflights users on 8/5. 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 8/272:37 pm -
Nonstop2h 56m
Mon 8/317:15 am -
Nonstop3h 04m
Deal found 8/5![Frontier logo]()
$146
This Cheapflightsfares deal was found by Cheapflights users on 8/6. 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 8/272:37 pm -
Nonstop2h 56m
Thu 9/37:15 am -
Nonstop3h 04m
Deal found 8/6![Frontier logo]()
$147
This Frontier deal was found by Cheapflights users on 8/7. 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 10/87:41 pm -
Nonstop2h 53m
Tue 10/137:45 am -
Nonstop3h 06m
Deal found 8/7![Frontier logo]()
$148
This Frontier deal was found by Cheapflights users on 8/7. 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 10/227:41 pm -
Nonstop2h 53m
Fri 10/237:45 am -
Nonstop3h 06m
Deal found 8/7![Frontier logo]()
$149
This Gotogate deal was found by Cheapflights users on 8/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:29 pm -
Nonstop2h 47m
Sun 8/307:15 am -
Nonstop3h 04m
Deal found 8/7![Multiple Airlines logo]()
$150
Best flights from Seattle to DenverDiscover carefully curated flight deals from Seattle to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
Discover carefully curated flight deals from Seattle to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
This Southwest deal was found by Cheapflights users on 8/9. 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 9/166:25 am -
1 stop5h 35m
Sat 9/191:35 pm -
2 stops7h 55m
Deal found 8/9![Southwest logo]()
$198
This Delta deal was found by Cheapflights users on 8/6. 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.
Tue 8/258:40 am -
Nonstop2h 46m
Fri 8/286:20 am -
Nonstop2h 59m
Deal found 8/6![Delta logo]()
$247
This United Airlines deal was found by Cheapflights users on 8/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:00 am -
Nonstop2h 45m
Sun 8/309:03 pm -
Nonstop3h 01m
Deal found 8/5![United Airlines logo]()
$288
This Southwest deal was found by Cheapflights users on 8/5. 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 8/265:55 am -
2 stops7h 15m
Fri 8/285:30 pm -
1 stop8h 10m
Deal found 8/5![Southwest logo]()
$252
This Southwest deal was found by Cheapflights users on 8/5. 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 8/279:10 am -
1 stop8h 05m
Sat 8/291:35 pm -
2 stops7h 55m
Deal found 8/5![Southwest logo]()
$252
This Southwest deal was found by Cheapflights users on 8/9. 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 12/111:40 pm -
2 stops9h 00m
Mon 12/142:25 pm -
2 stops10h 05m
Deal found 8/9![Southwest logo]()
$263
This Southwest deal was found by Cheapflights users on 8/6. 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 10/71:25 pm -
Nonstop2h 40m
Tue 10/1312:20 pm -
Nonstop3h 00m
Deal found 8/6![Southwest logo]()
$267
This Southwest deal was found by Cheapflights users on 8/6. 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 8/245:00 am -
2 stops8h 20m
Fri 8/285:30 pm -
1 stop8h 10m
Deal found 8/6![Southwest logo]()
$272
This Southwest deal was found by Cheapflights users on 8/9. 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 10/711:30 am -
1 stop5h 20m
Wed 10/148:50 am -
2 stops7h 05m
Deal found 8/9![Southwest logo]()
$288
This Southwest deal was found by Cheapflights users on 8/9. 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 9/2212:40 pm -
2 stops7h 45m
Tue 9/294:45 pm -
1 stop7h 45m
Deal found 8/9![Southwest logo]()
$292
This Southwest deal was found by Cheapflights users on 8/9. 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 8/283:25 pm -
2 stops7h 20m
Tue 9/11:45 pm -
1 stop6h 25m
Deal found 8/9![Southwest logo]()
$296
This Southwest deal was found by Cheapflights users on 8/7. 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 10/167:15 am -
1 stop7h 40m
Tue 10/208:50 am -
2 stops7h 05m
Deal found 8/7![Southwest logo]()
$314
Last-minute flights from Seattle to DenverDiscover last-minute flight deals from Seattle to Denver. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Denver. Data last updated August 10, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/5. 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.
Mon 8/247:06 pm -
Nonstop2h 52m
Thu 8/277:15 am -
Nonstop3h 04m
Deal found 8/5![Frontier logo]()
$136
This Frontier deal was found by Cheapflights users on 8/5. 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 8/257:06 pm -
Nonstop2h 52m
Wed 8/267:15 am -
Nonstop3h 04m
Deal found 8/5![Frontier logo]()
$138
This Cheapflightsfares deal was found by Cheapflights users on 8/5. 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 8/272:37 pm -
Nonstop2h 56m
Mon 8/317:15 am -
Nonstop3h 04m
Deal found 8/5![Frontier logo]()
$146
This Cheapflightsfares deal was found by Cheapflights users on 8/6. 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 8/272:37 pm -
Nonstop2h 56m
Thu 9/37:15 am -
Nonstop3h 04m
Deal found 8/6![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 8/289:29 pm -
1 stop10h 36m
Sun 8/307:15 am -
Nonstop3h 04m
Deal found 8/7![Frontier logo]()
$148
This Gotogate deal was found by Cheapflights users on 8/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:29 pm -
Nonstop2h 47m
Sun 8/307:15 am -
Nonstop3h 04m
Deal found 8/7![Multiple Airlines logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 9/108:15 pm -
1 stop12h 17m
Tue 9/151:07 pm -
Nonstop3h 01m
Deal found 8/5![Frontier logo]()
$152
This deal was found by Cheapflights users on 8/6. 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.
Wed 9/164:27 pm -
Nonstop2h 54m
Tue 9/221:07 pm -
Nonstop3h 01m
Deal found 8/6![Frontier logo]()
$143
This Super.com deal was found by Cheapflights users on 8/6. 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.
Mon 9/214:27 pm -
Nonstop2h 54m
Wed 9/231:07 pm -
Nonstop3h 01m
Deal found 8/6![Frontier logo]()
$142
This Super.com deal was found by Cheapflights users on 8/6. 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 9/234:27 pm -
Nonstop2h 54m
Tue 9/291:07 pm -
Nonstop3h 01m
Deal found 8/6![Frontier logo]()
$141
This Frontier deal was found by Cheapflights users on 8/8. 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 9/244:27 pm -
Nonstop2h 54m
Mon 9/281:07 pm -
Nonstop3h 01m
Deal found 8/8![Frontier logo]()
$149
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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 9/254:27 pm -
Nonstop2h 54m
Sun 10/41:07 pm -
Nonstop3h 01m
Deal found 8/10![Frontier logo]()
$151
One-way flights from Seattle to DenverSearch for one-way flight options from Seattle to Denver. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
Search for one-way flight options from Seattle to Denver. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Frontier deal was found by Cheapflights users on 8/5. 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 8/197:06 pm -
Nonstop2h 52m
Deal found 8/5![Frontier logo]()
$94
This Booking.com deal was found by Cheapflights users on 8/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:06 pm -
Nonstop2h 52m
Deal found 8/8![Frontier logo]()
$95
This Southwest deal was found by Cheapflights users on 8/10. 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 9/18:30 am -
1 stop7h 35m
Deal found 8/10![Southwest logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Mon 11/97:00 pm -
1 stop7h 52m
Deal found 8/10![Frontier logo]()
$98
This Cheapflightsfares deal was found by Cheapflights users on 8/9. 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 9/184:27 pm -
Nonstop2h 54m
Deal found 8/9![Frontier logo]()
$99
This Cheapflightsfares deal was found by Cheapflights users on 8/5. 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 11/216:01 pm -
Nonstop2h 59m
Deal found 8/5![Frontier logo]()
$100
This Cheapflightsfares deal was found by Cheapflights users on 8/8. 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 8/317:06 pm -
Nonstop2h 52m
Deal found 8/8![Frontier logo]()
$102
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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 9/114:27 pm -
Nonstop2h 54m
Deal found 8/10![Frontier logo]()
$103
This Trip.com deal was found by Cheapflights users on 8/5. 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.
Mon 10/58:15 pm -
1 stop12h 17m
Deal found 8/5![Frontier logo]()
$104
This Frontier deal was found by Cheapflights users on 8/6. 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.
Fri 9/47:06 pm -
Nonstop2h 52m
Deal found 8/6![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 11/87:00 pm -
1 stop7h 52m
Deal found 8/5![Frontier logo]()
$106
Find flight deals from Seattle to Denver
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Denver (DEN). 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 August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $136 (Super.com) |
One-way from | $94 (Frontier) |
Popular in | June |
Cheapest in | January |
Average price | $242 |
Good round-trip deal | $240 or less |
Good one-way deal | $168 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Denver 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 August 10, 2026.
Use the filters below to find and compare flights from Seattle to Denver that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Wed 9/16
6:25 am-1:00 pm
1 stop5h 35m
Denver Intl
Sat 9/19
1:35 pm-8:30 pm
2 stops7h 55m
$198
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Tue 8/25
8:40 am-12:26 pm
Nonstop2h 46m
Denver Intl
Fri 8/28
6:20 am-8:19 am
Nonstop2h 59m
$247
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Wed 8/26
5:55 am-2:10 pm
2 stops7h 15m
Denver Intl
Fri 8/28
5:30 pm-12:40 am
1 stop8h 10m
$252
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Thu 8/27
9:10 am-6:15 pm
1 stop8h 05m
Denver Intl
Sat 8/29
1:35 pm-8:30 pm
2 stops7h 55m
$252
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Fri 12/11
1:40 pm-11:40 pm
2 stops9h 00m
Denver Intl
Mon 12/14
2:25 pm-11:30 pm
2 stops10h 05m
$263
Quickest round-trip
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Wed 10/7
1:25 pm-5:05 pm
Nonstop2h 40m
Denver Intl
Tue 10/13
12:20 pm-2:20 pm
Nonstop3h 00m
$267
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Mon 8/24
5:00 am-2:20 pm
2 stops8h 20m
Denver Intl
Fri 8/28
5:30 pm-12:40 am
1 stop8h 10m
$272
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Thu 8/27
5:00 am-8:45 am
Nonstop2h 45m
Denver Intl
Sun 8/30
9:03 pm-11:04 pm
Nonstop3h 01m
$288
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Wed 10/7
11:30 am-5:50 pm
1 stop5h 20m
Denver Intl
Wed 10/14
8:50 am-2:55 pm
2 stops7h 05m
$288
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Tue 9/22
12:40 pm-9:25 pm
2 stops7h 45m
Denver Intl
Tue 9/29
4:45 pm-11:30 pm
1 stop7h 45m
$292
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Seattle to Denver
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 Seattle to Denver in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Denver flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Denver 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 Seattle-Denver 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 Seattle to Denver
Have a flexible travel schedule? Discover the best time to fly to Denver from Seattle with our price prediction graph.
SEA-DEN
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 Seattle to Denver
Prices
Airlines
Delays
How far ahead should I book a flight from Seattle to Denver?
To ensure you get the cheapest price possible for a flight from Seattle to Denver, you should look to book at least 73 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 Seattle to Denver?
Currently, January is the cheapest month in which you can book a flight from Seattle to Denver (average of $161). Flying from Seattle to Denver in June is currently the most expensive (average of $337). 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 SEA to DEN?
Find hourly flight availability from Seattle to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 10, 2026.
A simple way to save on the total cost of your ticket is to fly from Seattle to Denver in the evening. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from Seattle to Denver?
Use this chart to determine the cheapest time to fly round-trip from Seattle to Denver. Price data was last updated on August 1, 2026.
Travelers seeking maximum savings on their Seattle to Denver flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from Seattle to Denver delayed?
About 17% of weekly flights between Seattle and Denver have experienced delays in the past year, with the average delay time being 135 minutes.
What is the most punctual flight time for Seattle to Denver flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Seattle to Denver flights?
Over the last year, United Airlines have had the lowest number of delays on this route, with just 9% of flights being delayed.
The best insider tips for Seattle to Denver 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 Seattle to Denver trip
Our travel experts
Reviews of airlines servicing Denver
Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated August 10, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andDelta from Seattle to Denver. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Seattle to Denver. 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 Denver?
Book flights to Denver if you plan to visit one of these locationsThornton
Westminster
Black Hawk
Lakewood
Centennial
Broomfield
Golden
Wheat Ridge
Silverthorne
Central City
Fort Morgan
Cripple Creek
Greeley
Winter Park
Limon
Manitou Springs
Frisco
Englewood
Glendale
Evergreen
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Denver flight routes
Flights by cabin class
Other flight options
Other flights from Seattle
Popular flights
Alternative routes for Seattle to Denver
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Denver by adding a car rental and/or hotel reservation to your travel itinerary.
Other flights to Denver
Explore flights to Denver departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 10, 2026.
Search flights from Seattle to Denver by cabin class
Find flights from Seattle to Denver, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Denver flights
Browse other Seattle and Denver flight options. Last updated on August 10, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on August 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 7 airlines flying from Seattle to Denver
Discover the top 7 airlines that operate flights from Seattle to Denver. 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 August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$55 | Average$184 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$69 | Average$207 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$95 | Average$264 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$116 | Average$294 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$117 | Average$310 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$137 | Average$322 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$200 | Average$328 | FlexibilityNo cancel fee | On-time62% |