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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
12 Mar — 19 Mar1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Denver Intl are usually found in January or September, booked 69 days in advance, depart on a Tuesday or Monday and return on a Monday
Cheap flight deals from Seattle to Denver
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Cheapest flights from Seattle to Denver
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 10 February 2026.
Thu 26/322:08
SEA
-
DEN
1 stop10h 36m
Frontier
Thu 2/409:25
DEN
-
SEA
Nonstop3h 12m
Frontier
Deal found 9/2£113
Thu 5/313:16
SEA
-
DEN
Nonstop2h 51m
Frontier
Tue 10/309:00
DEN
-
SEA
1 stop9h 09m
Frontier
Deal found 7/2£114
Wed 15/419:05
SEA
-
DEN
Nonstop2h 51m
United Airlines
Wed 22/415:59
DEN
-
SEA
Nonstop3h 01m
United Airlines
Deal found 9/2£115
Sat 25/407:05
SEA
-
DEN
Nonstop2h 49m
Alaska Airlines
Sat 25/413:02
DEN
-
SEA
1 stop7h 55m
Alaska Airlines
Deal found 9/2£118
Wed 11/308:30
SEA
-
DEN
Nonstop2h 55m
Delta
Sat 21/319:40
DEN
-
SEA
Nonstop3h 12m
Delta
Deal found 8/2£122
Wed 11/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Fri 13/306:30
DEN
-
SEA
Nonstop3h 06m
Delta
Deal found 9/2£130
Wed 11/310:30
SEA
-
DEN
1 stop6h 18m
Alaska Airlines
Fri 27/319:24
DEN
-
SEA
Nonstop3h 09m
Alaska Airlines
Deal found 6/2£136
Sat 14/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Sun 15/306:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 9/2£137
Fri 6/305:15
SEA
-
DEN
2 stops10h 15m
Southwest
Mon 9/320:50
DEN
-
SEA
Nonstop3h 00m
Southwest
Deal found 7/2£141
Tue 31/306:45
SEA
-
DEN
1 stop8h 45m
Southwest
Tue 31/320:30
DEN
-
SEA
Nonstop3h 00m
Southwest
Deal found 7/2£141
Best flights from Seattle to Denver
Discover carefully curated flight deals from Seattle to Denver that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 February 2026.
Mon 9/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Sat 28/306:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 6/2£122
Tue 10/315:30
SEA
-
DEN
Nonstop2h 45m
United Airlines
Tue 17/316:04
DEN
-
SEA
Nonstop3h 00m
United Airlines
Deal found 9/2£130
Tue 10/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Wed 11/306:30
DEN
-
SEA
Nonstop3h 06m
Delta
Deal found 9/2£122
Tue 3/309:00
SEA
-
DEN
Nonstop2h 45m
United Airlines
Wed 4/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Deal found 7/2£130
Wed 11/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Fri 13/306:30
DEN
-
SEA
Nonstop3h 06m
Delta
Deal found 6/2£130
Sat 14/305:00
SEA
-
DEN
Nonstop2h 38m
United Airlines
Thu 19/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Deal found 7/2£137
Tue 7/408:30
SEA
-
DEN
Nonstop2h 56m
Delta
Sat 11/406:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 9/2£130
Thu 5/313:40
SEA
-
DEN
Nonstop2h 47m
Delta
Wed 11/319:40
DEN
-
SEA
Nonstop3h 10m
Delta
Deal found 9/2£137
Fri 13/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Wed 18/319:40
DEN
-
SEA
Nonstop3h 12m
Delta
Deal found 8/2£137
Thu 5/308:15
SEA
-
DEN
Nonstop3h 00m
Delta
Tue 10/319:40
DEN
-
SEA
Nonstop3h 10m
Delta
Deal found 7/2£137
Direct flights from Seattle to Denver
Explore direct flight options from Seattle to Denver based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 February 2026.
Wed 15/419:05
SEA
-
DEN
Nonstop2h 51m
United Airlines
Wed 22/415:59
DEN
-
SEA
Nonstop3h 01m
United Airlines
Deal found 9/2£115
Wed 11/308:30
SEA
-
DEN
Nonstop2h 44m
Alaska Airlines
Wed 18/319:24
DEN
-
SEA
Nonstop3h 09m
Alaska Airlines
Deal found 9/2£122
Thu 26/312:24
SEA
-
DEN
Nonstop2h 51m
Frontier
Thu 2/409:25
DEN
-
SEA
Nonstop3h 12m
Frontier
Deal found 9/2£127
Tue 10/308:30
SEA
-
DEN
Nonstop2h 55m
Delta
Sat 14/319:40
DEN
-
SEA
Nonstop3h 10m
Delta
Deal found 9/2£130
Sat 14/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Mon 16/306:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 9/2£137
Thu 23/413:17
SEA
-
DEN
Nonstop2h 54m
Alaska Airlines
Thu 23/419:25
DEN
-
SEA
Nonstop3h 04m
Alaska Airlines
Deal found 9/2£141
Mon 6/419:46
SEA
-
DEN
Nonstop2h 46m
Delta
Thu 9/406:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 8/2£144
Wed 15/409:20
SEA
-
DEN
Nonstop2h 40m
Southwest
Wed 22/415:00
DEN
-
SEA
Nonstop2h 55m
Southwest
Deal found 9/2£152
Tue 17/308:30
SEA
-
DEN
Nonstop2h 56m
Delta
Fri 20/306:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 8/2£159
Sat 28/305:00
SEA
-
DEN
Nonstop2h 38m
United Airlines
Wed 1/419:05
DEN
-
SEA
Nonstop3h 01m
United Airlines
Deal found 9/2£160
Fri 20/305:00
SEA
-
DEN
Nonstop2h 38m
United Airlines
Sat 28/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Deal found 7/2£161
Thu 9/419:46
SEA
-
DEN
Nonstop2h 46m
Delta
Sun 12/406:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 9/2£166
Last-minute flights from Seattle to Denver
Discover last-minute flight deals from Seattle to Denver. Data last updated 10 February 2026 and is based on user searches.
Thu 5/313:16
SEA
-
DEN
Nonstop2h 51m
Frontier
Tue 10/309:00
DEN
-
SEA
1 stop9h 09m
Frontier
Deal found 7/2£114
Fri 6/305:15
SEA
-
DEN
2 stops10h 15m
Southwest
Mon 9/320:50
DEN
-
SEA
Nonstop3h 00m
Southwest
Deal found 7/2£141
Mon 9/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Wed 11/306:30
DEN
-
SEA
Nonstop3h 06m
Delta
Deal found 8/2£115
Mon 9/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Mon 16/306:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 9/2£144
Wed 11/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Wed 18/306:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 8/2£122
Wed 11/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Thu 19/319:40
DEN
-
SEA
Nonstop3h 12m
Delta
Deal found 8/2£130
Wed 11/310:30
SEA
-
DEN
1 stop6h 18m
Alaska Airlines
Fri 27/319:24
DEN
-
SEA
Nonstop3h 09m
Alaska Airlines
Deal found 6/2£136
Sat 14/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Mon 16/306:30
DEN
-
SEA
Nonstop3h 08m
Delta
Deal found 9/2£137
Thu 26/322:08
SEA
-
DEN
1 stop10h 36m
Frontier
Thu 2/409:25
DEN
-
SEA
Nonstop3h 12m
Frontier
Deal found 9/2£113
Tue 31/306:45
SEA
-
DEN
1 stop8h 45m
Southwest
Tue 31/320:30
DEN
-
SEA
Nonstop3h 00m
Southwest
Deal found 7/2£141
One-way flights from Seattle to Denver
Search for one-way flight options from Seattle to Denver. Find affordable one-way fares based on user searches. Data last updated 10 February 2026.
Wed 11/308:30
SEA
-
DEN
Nonstop2h 55m
Delta
Deal found 9/2£58
Wed 11/313:56
SEA
-
DEN
1 stop9h 03m
Alaska Airlines
Deal found 6/2£65
Tue 10/319:45
SEA
-
DEN
Nonstop2h 44m
Delta
Deal found 9/2£65
Sat 4/419:46
SEA
-
DEN
Nonstop2h 46m
Delta
Deal found 9/2£69
Thu 26/319:46
SEA
-
DEN
Nonstop2h 46m
Delta
Deal found 9/2£73
Tue 10/311:00
SEA
-
DEN
2 stops8h 10m
Southwest
Deal found 9/2£76
Thu 12/305:00
SEA
-
DEN
1 stop8h 05m
Southwest
Deal found 8/2£80
Tue 31/314:35
SEA
-
DEN
2 stops9h 10m
Southwest
Deal found 8/2£84
Wed 10/614:36
SEA
-
DEN
Nonstop2h 49m
United Airlines
Deal found 8/2£86
Wed 15/419:05
SEA
-
DEN
Nonstop2h 51m
United Airlines
Deal found 9/2£87
Sat 11/719:40
SEA
-
DEN
Nonstop2h 50m
Delta
Deal found 9/2£90
Tue 9/615:31
SEA
-
DEN
1 stop7h 12m
United Airlines
Deal found 8/2£94
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 10 February 2026.
Customise 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 858,174 searches. Data last updated 10 February 2026.
Use the filters below to find and compare flights from Seattle to Denver that are best for you.
Fly from
Seattle
Fly to
Denver
Route
Depart
Return
Price
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Mon 9/3
19:45-23:29
Nonstop2h 44m
Denver Intl
Sat 28/3
06:30-08:38
Nonstop3h 08m
£122
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 10/3
19:45-23:29
Nonstop2h 44m
Denver Intl
Wed 11/3
06:30-08:36
Nonstop3h 06m
£122
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 10/3
15:30-19:15
Nonstop2h 45m
Denver Intl
Tue 17/3
16:04-18:04
Nonstop3h 00m
£130
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 3/3
09:00-12:45
Nonstop2h 45m
Denver Intl
Wed 4/3
07:45-09:49
Nonstop3h 04m
£130
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Wed 11/3
19:45-23:29
Nonstop2h 44m
Denver Intl
Fri 13/3
06:30-08:36
Nonstop3h 06m
£130
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 7/4
08:30-12:26
Nonstop2h 56m
Denver Intl
Sat 11/4
06:30-08:38
Nonstop3h 08m
£130
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 14/3
05:00-08:38
Nonstop2h 38m
Denver Intl
Thu 19/3
07:45-09:49
Nonstop3h 04m
£137
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 5/3
13:40-17:27
Nonstop2h 47m
Denver Intl
Wed 11/3
19:40-21:50
Nonstop3h 10m
£137
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Fri 13/3
19:45-23:29
Nonstop2h 44m
Denver Intl
Wed 18/3
19:40-21:52
Nonstop3h 12m
£137
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 5/3
08:15-12:15
Nonstop3h 00m
Denver Intl
Tue 10/3
19:40-21:50
Nonstop3h 10m
£137
Flights are sorted by cheapest return flights first.
Deals found on 9/2
Showing 1-10 of 22 results
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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 return 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?
Use this chart to determine the optimal time to book a return flight from Seattle to Denver. Price data was last updated on 6 February 2026.
The price you pay for your flight from Seattle to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 69 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 £39). Flying from Seattle to Denver in July is currently the most expensive (average of £81). 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 10 February 2026.
One of the essential ways to save on airfare from Seattle to Denver is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 65% on airfare.
Weekly flight availability from Seattle to Denver
Explore weekly flight availability from Seattle to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 10 February 2026.
The most flights from SEA to DEN are scheduled on a Monday (36 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).
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 134 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 Sunday 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 past year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.
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.
How popular is this Seattle to Denver flight route?
Flights from Seattle/Tacoma Intl to Denver Intl have been viewed 7 times in the past calendar month.
How long is the flight from Seattle to Denver?
Departing from Seattle to Denver will take you 2h 44m. The distance between Seattle and Denver is about 1022 mi. All flights are typically direct.
What are the most reliable airlines from Seattle to Denver?
No one likes to see their flight delayed. When booking a flight from Seattle to Denver consider choosing Aeromexico (96%), Virgin Atlantic (94%) or SkyWest Airlines (93%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Seattle to Denver?
Looking for the cheapest flight from Seattle to Denver? While on average our users pay £159, our data indicates the cheapest price to be £159. The most popular route (Seattle/Tacoma Intl - Denver Intl), is priced around £127.
Can I find deals for business class flights from Seattle to Denver?
Yes. Cheapflights offers flight deals from Seattle to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
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 £39). Flying from Seattle to Denver in July is currently the most expensive (average of £81). 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.
Explore flights to Denver departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 10 February 2026.
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on 10 February 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Seattle to Denver?
Cheapflights makes it easy to find Seattle to Denver flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from Seattle to Denver?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Denver from Seattle.
Can Cheapflights find flights from Seattle to Denver with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Denver flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Seattle to Denver become cheaper?
Of course! You can now track prices for flights from Seattle to Denver and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
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