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 23/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
1 Aug — 8 Aug1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Denver Intl to Seattle/Tacoma Intl are usually found in January or February, booked 47 days in advance, depart on a Tuesday or Monday and return on a Monday
Cheap flight deals from Denver to Seattle
Enter your travel dates to find the best prices.
Cheapest
Best
Direct
Last-minute
One-way
Cheapest flights from Denver to Seattle
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 2 July 2026.
Sun 27/922:29
DEN
-
SEA
Nonstop2h 58m
Frontier
Wed 30/921:16
SEA
-
DEN
1 stop11h 18m
Frontier
Deal found 28/6£151
Tue 21/709:13
DEN
-
SEA
Nonstop3h 07m
Frontier
Tue 21/720:13
SEA
-
DEN
1 stop11h 52m
Frontier
Deal found 29/6£157
Fri 18/907:45
DEN
-
SEA
Nonstop3h 06m
Frontier
Sun 20/919:41
SEA
-
DEN
Nonstop2h 53m
Frontier
Deal found 28/6£173
Sat 1/818:39
DEN
-
SEA
Nonstop3h 02m
Delta
Tue 11/820:07
SEA
-
DEN
Nonstop2h 51m
Delta
Deal found 1/7£179
Sat 12/1217:52
DEN
-
SEA
1 stop6h 29m
United Airlines
Wed 16/1205:07
SEA
-
DEN
Nonstop2h 43m
United Airlines
Deal found 1/7£183
Sat 25/706:00
DEN
-
SEA
Nonstop3h 00m
United Airlines
Wed 29/715:33
SEA
-
DEN
1 stop6h 11m
United Airlines
Deal found 30/6£186
Tue 3/1112:30
DEN
-
SEA
2 stops7h 05m
Southwest
Tue 10/1109:25
SEA
-
DEN
Nonstop2h 35m
Southwest
Deal found 28/6£187
Tue 25/822:49
DEN
-
SEA
1 stop12h 50m
Frontier
Sat 29/820:53
SEA
-
DEN
1 stop5h 55m
Frontier
Deal found 1/7£189
Tue 21/706:15
DEN
-
SEA
2 stops8h 20m
Southwest
Tue 21/719:30
SEA
-
DEN
Nonstop2h 40m
Southwest
Deal found 27/6£190
Sat 15/808:02
DEN
-
SEA
Nonstop2h 59m
United Airlines
Sat 22/805:00
SEA
-
DEN
Nonstop2h 45m
United Airlines
Deal found 28/6£192
Best flights from Denver to Seattle
Discover carefully curated flight deals from Denver to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 July 2026.
Mon 14/1206:45
DEN
-
SEA
Nonstop3h 14m
Delta
Tue 22/1219:40
SEA
-
DEN
Nonstop2h 48m
Delta
Deal found 2/7£198
Tue 25/812:50
DEN
-
SEA
2 stops8h 25m
Southwest
Sat 29/810:50
SEA
-
DEN
2 stops6h 45m
Southwest
Deal found 1/7£201
Thu 6/818:43
DEN
-
SEA
Nonstop3h 02m
Delta
Tue 11/813:55
SEA
-
DEN
Nonstop2h 53m
Delta
Deal found 28/6£201
Mon 27/713:25
DEN
-
SEA
2 stops7h 05m
Southwest
Tue 28/719:30
SEA
-
DEN
Nonstop2h 40m
Southwest
Deal found 29/6£213
Tue 1/912:50
DEN
-
SEA
2 stops8h 25m
Southwest
Sat 5/909:20
SEA
-
DEN
2 stops9h 15m
Southwest
Deal found 1/7£216
Tue 24/1106:45
DEN
-
SEA
Nonstop3h 14m
Delta
Fri 27/1105:45
SEA
-
DEN
1 stop5h 10m
Delta
Deal found 1/7£216
Mon 20/713:25
DEN
-
SEA
2 stops7h 05m
Southwest
Tue 4/809:25
SEA
-
DEN
1 stop6h 30m
Southwest
Deal found 29/6£217
Fri 21/810:15
DEN
-
SEA
2 stops7h 50m
Southwest
Tue 25/805:20
SEA
-
DEN
1 stop7h 10m
Southwest
Deal found 30/6£217
Mon 20/713:25
DEN
-
SEA
2 stops7h 05m
Southwest
Tue 21/715:25
SEA
-
DEN
1 stop6h 45m
Southwest
Deal found 29/6£220
Wed 7/1012:30
DEN
-
SEA
2 stops9h 40m
Southwest
Mon 12/1014:15
SEA
-
DEN
1 stop8h 15m
Southwest
Deal found 28/6£220
Sun 27/918:15
DEN
-
SEA
1 stop7h 35m
Southwest
Wed 30/905:55
SEA
-
DEN
2 stops7h 15m
Southwest
Deal found 28/6£220
Wed 12/812:50
DEN
-
SEA
2 stops8h 25m
Southwest
Sun 16/812:25
SEA
-
DEN
1 stop7h 05m
Southwest
Deal found 30/6£228
Direct flights from Denver to Seattle
Explore direct flight options from Denver to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 2 July 2026.
Fri 18/907:45
DEN
-
SEA
Nonstop3h 06m
Frontier
Sun 20/919:41
SEA
-
DEN
Nonstop2h 53m
Frontier
Deal found 28/6£173
Sat 1/818:39
DEN
-
SEA
Nonstop3h 02m
Delta
Tue 11/820:07
SEA
-
DEN
Nonstop2h 51m
Delta
Deal found 1/7£179
Sat 15/808:02
DEN
-
SEA
Nonstop2h 59m
United Airlines
Sat 22/805:00
SEA
-
DEN
Nonstop2h 45m
United Airlines
Deal found 28/6£192
Tue 21/706:00
DEN
-
SEA
Nonstop3h 00m
United Airlines
Sat 25/705:00
SEA
-
DEN
Nonstop2h 43m
United Airlines
Deal found 28/6£194
Sat 15/814:20
DEN
-
SEA
Nonstop2h 58m
Delta
Mon 17/820:07
SEA
-
DEN
Nonstop2h 51m
Delta
Deal found 1/7£198
Sat 22/814:20
DEN
-
SEA
Nonstop2h 58m
Delta
Sun 23/808:40
SEA
-
DEN
Nonstop2h 46m
Delta
Deal found 27/6£201
Thu 20/818:50
DEN
-
SEA
Nonstop2h 55m
Southwest
Tue 25/806:40
SEA
-
DEN
Nonstop2h 35m
Southwest
Deal found 28/6£204
Wed 29/718:15
DEN
-
SEA
Nonstop3h 15m
Southwest
Wed 5/818:10
SEA
-
DEN
Nonstop2h 45m
Southwest
Deal found 29/6£213
Sun 19/706:00
DEN
-
SEA
Nonstop2h 55m
United Airlines
Sat 25/705:00
SEA
-
DEN
Nonstop2h 43m
United Airlines
Deal found 28/6£216
Fri 17/718:39
DEN
-
SEA
Nonstop3h 02m
Delta
Tue 21/719:59
SEA
-
DEN
Nonstop2h 45m
Delta
Deal found 29/6£217
Fri 31/706:02
DEN
-
SEA
Nonstop3h 03m
Alaska Airlines
Sun 2/820:11
SEA
-
DEN
Nonstop2h 48m
Alaska Airlines
Deal found 29/6£218
Last-minute flights from Denver to Seattle
Discover last-minute flight deals from Denver to Seattle. Data last updated 2 July 2026 and is based on user searches.
Tue 21/709:13
DEN
-
SEA
Nonstop3h 07m
Frontier
Tue 21/720:13
SEA
-
DEN
1 stop11h 52m
Frontier
Deal found 29/6£157
Tue 21/706:15
DEN
-
SEA
2 stops8h 20m
Southwest
Tue 21/719:30
SEA
-
DEN
Nonstop2h 40m
Southwest
Deal found 27/6£190
Sat 25/706:00
DEN
-
SEA
Nonstop3h 00m
United Airlines
Wed 29/715:33
SEA
-
DEN
1 stop6h 11m
United Airlines
Deal found 30/6£186
Sat 1/818:39
DEN
-
SEA
Nonstop3h 02m
Delta
Tue 11/820:07
SEA
-
DEN
Nonstop2h 51m
Delta
Deal found 1/7£179
Wed 12/814:40
DEN
-
SEA
2 stops7h 35m
Southwest
Tue 18/811:40
SEA
-
DEN
1 stop8h 40m
Southwest
Deal found 1/7£198
Sat 15/808:02
DEN
-
SEA
Nonstop2h 59m
United Airlines
Sat 22/805:00
SEA
-
DEN
Nonstop2h 45m
United Airlines
Deal found 28/6£192
Sat 15/814:20
DEN
-
SEA
Nonstop2h 58m
Delta
Mon 17/820:07
SEA
-
DEN
Nonstop2h 51m
Delta
Deal found 1/7£198
Sat 22/813:30
DEN
-
SEA
1 stop5h 59m
United Airlines
Sat 29/815:30
SEA
-
DEN
1 stop5h 38m
United Airlines
Deal found 30/6£194
Sat 22/813:35
DEN
-
SEA
2 stops7h 55m
Southwest
Sat 29/805:30
SEA
-
DEN
2 stops7h 55m
Southwest
Deal found 30/6£201
Tue 25/822:49
DEN
-
SEA
1 stop12h 50m
Frontier
Sat 29/820:53
SEA
-
DEN
1 stop5h 55m
Frontier
Deal found 1/7£189
Sat 29/809:15
DEN
-
SEA
1 stop5h 25m
Southwest
Wed 2/912:40
SEA
-
DEN
2 stops7h 40m
Southwest
Deal found 27/6£195
One-way flights from Denver to Seattle
Search for one-way flight options from Denver to Seattle. Find affordable one-way fares based on user searches. Data last updated 2 July 2026.
Wed 23/908:02
DEN
-
SEA
Nonstop2h 59m
United Airlines
Deal found 30/6£90
Sat 31/1017:50
DEN
-
SEA
1 stop6h 26m
United Airlines
Deal found 30/6£94
Wed 29/719:25
DEN
-
SEA
1 stop5h 10m
Southwest
Deal found 1/7£97
Tue 21/706:00
DEN
-
SEA
1 stop6h 44m
Alaska Airlines
Deal found 29/6£98
Wed 16/912:50
DEN
-
SEA
2 stops8h 25m
Southwest
Deal found 1/7£101
Tue 22/1221:00
DEN
-
SEA
Nonstop2h 59m
United Airlines
Deal found 30/6£102
Tue 21/718:55
DEN
-
SEA
1 stop5h 20m
Southwest
Deal found 29/6£109
Tue 24/1105:00
DEN
-
SEA
1 stop5h 40m
United Airlines
Deal found 1/7£109
Tue 22/1218:35
DEN
-
SEA
1 stop6h 30m
Southwest
Deal found 30/6£112
Sat 22/816:20
DEN
-
SEA
Nonstop2h 55m
Southwest
Deal found 28/6£113
Find flight deals from Denver to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 July 2026.
Customise 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 858,174 searches. Data last updated 2 July 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
Price
Cheapest return flight
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Mon 14/12
06:45-08:59
Nonstop3h 14m
Seattle/Tacoma Intl
Tue 22/12
19:40-23:28
Nonstop2h 48m
£198
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Tue 25/8
12:50-20:15
2 stops8h 25m
Seattle/Tacoma Intl
Sat 29/8
10:50-18:35
2 stops6h 45m
£201
Fastest return journey
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Thu 6/8
18:43-20:45
Nonstop3h 02m
Seattle/Tacoma Intl
Tue 11/8
13:55-17:48
Nonstop2h 53m
£201
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Mon 27/7
13:25-19:30
2 stops7h 05m
Seattle/Tacoma Intl
Tue 28/7
19:30-23:10
Nonstop2h 40m
£213
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Tue 1/9
12:50-20:15
2 stops8h 25m
Seattle/Tacoma Intl
Sat 5/9
09:20-19:35
2 stops9h 15m
£216
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Tue 24/11
06:45-08:59
Nonstop3h 14m
Seattle/Tacoma Intl
Fri 27/11
05:45-11:55
1 stop5h 10m
£216
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Mon 20/7
13:25-19:30
2 stops7h 05m
Seattle/Tacoma Intl
Tue 4/8
09:25-16:55
1 stop6h 30m
£217
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Fri 21/8
10:15-17:05
2 stops7h 50m
Seattle/Tacoma Intl
Tue 25/8
05:20-13:30
1 stop7h 10m
£217
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Mon 20/7
13:25-19:30
2 stops7h 05m
Seattle/Tacoma Intl
Tue 21/7
15:25-23:10
1 stop6h 45m
£220
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Wed 7/10
12:30-21:10
2 stops9h 40m
Seattle/Tacoma Intl
Mon 12/10
14:15-23:30
1 stop8h 15m
£220
Flights are sorted by cheapest return flights first.
Deals found on 27/6
Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3
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 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 Denver to Seattle
Prices
Airlines
Delays
How far ahead should I book a flight from Denver to Seattle?
To ensure you get the cheapest price possible for a flight from Denver to Seattle, you should look to book at least 46 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Denver to Seattle?
Currently, January is the cheapest month in which you can book a flight from Denver to Seattle (average of £105). Flying from Denver to Seattle in June is currently the most expensive (average of £235). 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 2 July 2026.
It’s typically best to fly out from Denver to Seattle in the evening. Doing so could potentially save you 55% on the flight price compared to flying in the afternoon, which is usually more expensive.
How much does it cost for a return flight from Denver to Seattle?
Weekly flight availability from Denver to Seattle
Explore weekly flight availability from Denver to Seattle. 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 2 July 2026.
The most flights from DEN to SEA are scheduled on a Thursday (48 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 on average).
How often are flights from Denver to Seattle delayed?
About 19% of weekly flights between Denver and Seattle have experienced delays in the past year, with the average delay time being 141 minutes.
What is the most punctual flight time for Denver to Seattle flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Denver to Seattle flights?
Over the past year, United Airlines have had the lowest number of delays on this route, with just 14% 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 2 July 2026.
Read reviews from past customers who have flown with Frontier
from Denver to Seattle. 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.
Worst part was not frontiers fault but being stuck on the tarmac for an hour at our arrival destination because of another planes issue and the lack of clear communication (said from the pilot himself)
Worst part was not frontiers fault but being stuck on the tarmac for an hour at our arrival destination because of another planes issue and the lack of clear communication (said from the pilot himself)
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.
What airports do I use to fly from Denver to Seattle?
You will need to book a flight from Denver Intl to Seattle/Tacoma Intl if you want to fly from Denver to Seattle. At least 1 airline has flights from Denver Intl (DEN) to Seattle/Tacoma Intl (SEA) on a regular basis. There are 30 flights to Seattle from the Denver airport per day. If you manage to book one that is nonstop, then you can expect the flight time from DEN to SEA to be around 3h 00m.
How popular is this Denver to Seattle flight route?
The Denver Intl to Seattle/Tacoma Intl flight path was viewed by 16 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
How long is the flight from Denver to Seattle?
Departing from Denver to Seattle will take you 3h 14m. Denver and Seattle are separated by a distance of 1022 mi. Both multi-stop and direct flights can be found to your destination and back.
What is the cheapest airline to fly from Denver to Seattle round-trip?
Flying on Frontier is currently your cheapest option to Seattle, with prices starting at £66. Frontier is priced at 60% lower than the current average price of a flight leaving 3 months from now.
What are the most reliable airlines from Denver to Seattle?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Denver to Seattle on time: Korean Air (97%), WestJet (96%), Air France (92%).
What are the cheapest flights from Denver to Seattle?
The cheapest flight price from Denver to Seattle is £136. On average you can expect to pay £191. The most popular route, (Denver Intl - Seattle/Tacoma Intl), can usually be booked for £132.
Can I find deals for business class flights from Denver to Seattle?
Yes. Cheapflights offers flight deals from Denver to Seattle 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 Denver to Seattle?
Currently, January is the cheapest month in which you can book a flight from Denver to Seattle (average of £105). Flying from Denver to Seattle in June is currently the most expensive (average of £235). 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.
Discover the top airline 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 858,174 searches. Data last updated 2 July 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 Denver to Seattle?
Deals for Denver to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from Denver to Seattle?
Cheapflights helps you find that perfect flight to Seattle from Denver by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Denver to Seattle with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Denver to Seattle, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Denver to Seattle become cheaper?
Not ready to book yet? You can track prices for flights from Denver to Seattle on Cheapflights with our Price Alert feature and get notified when better prices are available.
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.