$60+ 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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
May 17 — May 241
Round-trip
1 adult, Economy
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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 September, booked 66 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 April 17, 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 April 17, 2026.
This Super.com deal was found by Cheapflights users on 4/14. 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.
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Fri 5/87:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/14![Frontier logo]()
$97
This Frontier deal was found by Cheapflights users on 4/13. 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 5/47:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 5/67:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/13![Frontier logo]()
$98
This Cheapflightsfares deal was found by Cheapflights users on 4/13. 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 5/227:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Sun 5/248:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/13![Frontier logo]()
$102
This Frontier deal was found by Cheapflights users on 4/13. 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 5/177:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Sun 5/248:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/13![Frontier logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 5/77:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Sat 5/97:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/12![Frontier logo]()
$106
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 5/77:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Sun 5/107:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/14![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 4/14. 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 5/117:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Thu 5/147:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/14![Frontier logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/217:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Sun 5/248:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/13![Frontier logo]()
$111
This Super.com deal was found by Cheapflights users on 4/14. 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 4/297:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 5/67:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/14![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 5/610:29 pm
DEN
- SEA
1 stop12h 53m
Frontier
Deal found 4/12![Frontier logo]()
$113
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 5/67:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/1310:39 pm
DEN
- SEA
1 stop20h 56m
Frontier
Deal found 4/14![Frontier logo]()
$123
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 April 17, 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 April 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/13. 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 5/54:42 pm
SEA
- DEN
1 stop6h 17m
Alaska Airlines
Wed 5/66:45 am
DEN
- SEA
1 stop8h 21m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 4/13. 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 5/185:30 am
SEA
- DEN
Nonstop2h 35m
Southwest
Wed 6/106:55 pm
DEN
- SEA
1 stop5h 15m
Southwest
Deal found 4/13![Southwest logo]()
$272
This Delta deal was found by Cheapflights users on 4/14. 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 6/97:55 pm
SEA
- DEN
Nonstop2h 50m
Delta
Wed 6/103:55 pm
DEN
- SEA
1 stop7h 10m
Delta
Deal found 4/14![Delta logo]()
$276
This Alaska Airlines deal was found by Cheapflights users on 4/13. 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 5/910:22 am
SEA
- DEN
1 stop7h 03m
Alaska Airlines
Wed 5/136:40 am
DEN
- SEA
1 stop8h 50m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$287
This Southwest deal was found by Cheapflights users on 4/14. 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 5/76:30 am
SEA
- DEN
1 stop6h 20m
Southwest
Tue 6/21:45 pm
DEN
- SEA
2 stops10h 10m
Southwest
Deal found 4/14![Southwest logo]()
$291
This Delta deal was found by Cheapflights users on 4/14. 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 6/207:55 pm
SEA
- DEN
Nonstop2h 50m
Delta
Sun 6/286:30 am
DEN
- SEA
Nonstop3h 01m
Delta
Deal found 4/14![Delta logo]()
$316
This Alaska Airlines deal was found by Cheapflights users on 4/14. 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.
Thu 5/711:36 am
SEA
- DEN
1 stop5h 53m
Alaska Airlines
Sun 5/106:00 am
DEN
- SEA
Nonstop3h 03m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 4/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:50 am
SEA
- DEN
2 stops7h 15m
Southwest
Thu 5/283:20 pm
DEN
- SEA
2 stops8h 45m
Southwest
Deal found 4/15![Southwest logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 4/16. 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.
Thu 5/148:07 pm
SEA
- DEN
Nonstop2h 52m
Alaska Airlines
Tue 5/196:40 am
DEN
- SEA
1 stop17h 38m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$304
This Southwest deal was found by Cheapflights users on 4/12. 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 5/67:50 am
SEA
- DEN
2 stops8h 20m
Southwest
Sun 5/108:25 am
DEN
- SEA
1 stop6h 15m
Southwest
Deal found 4/12![Southwest logo]()
$317
This Southwest deal was found by Cheapflights users on 4/16. 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.
Sat 8/1512:30 pm
SEA
- DEN
1 stop6h 05m
Southwest
Sat 8/2212:00 pm
DEN
- SEA
2 stops8h 30m
Southwest
Deal found 4/16![Southwest logo]()
$320
This Southwest deal was found by Cheapflights users on 4/16. 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 5/142:50 pm
SEA
- DEN
1 stop7h 55m
Southwest
Tue 5/193:35 pm
DEN
- SEA
1 stop8h 20m
Southwest
Deal found 4/16![Southwest logo]()
$322
Last-minute flights from Seattle to DenverDiscover last-minute flight deals from Seattle to Denver. Data last updated April 17, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Denver. Data last updated April 17, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 4/297:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/15![Frontier logo]()
$155
This Super.com deal was found by Cheapflights users on 4/14. 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.
Tue 4/217:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Tue 4/287:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/14![Frontier logo]()
$166
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 5/67:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/14![Frontier logo]()
$112
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 4/297:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/14![Frontier logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Tue 4/287:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/14![Frontier logo]()
$152
This Frontier deal was found by Cheapflights users on 4/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Sat 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/15![Frontier logo]()
$163
This Frontier deal was found by Cheapflights users on 4/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Fri 5/16:00 am
DEN
- SEA
1 stop12h 52m
Frontier
Deal found 4/15![Frontier logo]()
$169
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 April 17, 2026.
Search for one-way flight options from Seattle to Denver. Find affordable one-way fares based on user searches. Data last updated April 17, 2026.
This Trip.com deal was found by Cheapflights users on 4/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/98:12 pm
SEA
- DEN
1 stop12h 03m
Frontier
Deal found 4/16![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/211:21 am
SEA
- DEN
1 stop31h 45m
Frontier
Deal found 4/16![Frontier logo]()
$62
This Kiwi.com deal was found by Cheapflights users on 4/11. 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 5/310:25 pm
SEA
- DEN
1 stop28h 00m
Frontier
Deal found 4/11![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/88:20 pm
SEA
- DEN
1 stop6h 38m
Frontier
Deal found 4/15![Frontier logo]()
$67
This Super.com deal was found by Cheapflights users on 4/14. 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 4/297:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 4/14![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3011:21 am
SEA
- DEN
1 stop7h 45m
Frontier
Deal found 4/16![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/611:06 am
SEA
- DEN
1 stop21h 58m
Frontier
Deal found 4/16![Frontier logo]()
$71
This deal was found by Cheapflights users on 4/12. 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.
Tue 6/307:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 4/12![Frontier logo]()
$72
This Super.com deal was found by Cheapflights users on 4/13. 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 5/217:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/13![Frontier logo]()
$73
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/311:21 am
SEA
- DEN
1 stop7h 45m
Frontier
Deal found 4/16![Frontier logo]()
$79
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 April 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $97 (Super.com) |
One-way from | $60 (Trip.com) |
Popular in | June |
Cheapest in | January |
Average price | $236 |
Good round-trip deal | $253 or less |
Good one-way deal | $155 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 April 17, 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 - DEN
SEADEN
Seattle/Tacoma Intl
Tue 5/5
4:42 pm-11:59 pm
1 stop6h 17m
Denver Intl
Wed 5/6
6:45 am-2:06 pm
1 stop8h 21m
$257
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Mon 5/18
5:30 am-9:05 am
Nonstop2h 35m
Denver Intl
Wed 6/10
6:55 pm-11:10 pm
1 stop5h 15m
$272
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 6/9
7:55 pm-11:45 pm
Nonstop2h 50m
Denver Intl
Wed 6/10
3:55 pm-10:05 pm
1 stop7h 10m
$276
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 5/9
10:22 am-6:25 pm
1 stop7h 03m
Denver Intl
Wed 5/13
6:40 am-2:30 pm
1 stop8h 50m
$287
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 5/7
6:30 am-1:50 pm
1 stop6h 20m
Denver Intl
Tue 6/2
1:45 pm-10:55 pm
2 stops10h 10m
$291
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 5/7
11:36 am-6:29 pm
1 stop5h 53m
Denver Intl
Sun 5/10
6:00 am-8:03 am
Nonstop3h 03m
$297
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 5/14
8:07 pm-11:59 pm
Nonstop2h 52m
Denver Intl
Tue 5/19
6:40 am-11:18 pm
1 stop17h 38m
$304
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Wed 5/20
6:50 am-3:05 pm
2 stops7h 15m
Denver Intl
Thu 5/28
3:20 pm-11:05 pm
2 stops8h 45m
$312
Quickest round-trip
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 6/20
7:55 pm-11:45 pm
Nonstop2h 50m
Denver Intl
Sun 6/28
6:30 am-8:31 am
Nonstop3h 01m
$316
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Wed 5/6
7:50 am-5:10 pm
2 stops8h 20m
Denver Intl
Sun 5/10
8:25 am-1:40 pm
1 stop6h 15m
$317
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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 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 Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 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.
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Everything you need to know about your flight from Seattle to Denver
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How far ahead should I book a flight from Seattle to Denver?
Use this chart to determine the optimal time to book a round-trip flight from Seattle to Denver. Price data was last updated on April 10, 2026.
To ensure you get the cheapest price possible for a flight from Seattle to Denver, you should look to book at least 66 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 $159). Flying from Seattle to Denver in June is currently the most expensive (average of $258). 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 April 17, 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 22% 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 April 11, 2026.
Travelers seeking maximum savings on their Seattle to Denver flight should consider departing on Friday 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 19% of weekly flights between Seattle and Denver have experienced delays in the past year, with the average delay time being 136 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 11% 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 April 17, 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.
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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
Black Hawk
Lakewood
Westminster
Broomfield
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Manitou Springs
Frisco
Englewood
Fort Morgan
Glendale
Evergreen
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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 April 17, 2026.
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Seattle and Denver flights
Browse other Seattle and Denver flight options. Last updated on April 17, 2026.
Other flights from Seattle
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Top 6 airlines flying from Seattle to Denver
Discover the top 6 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 April 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$56 | Average$167 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$224 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$95 | Average$233 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$117 | Average$287 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$250 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$130 | Average$296 | FlexibilityNo cancel fee | On-time69% |