This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
12 Oct — 19 Oct1
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 Wednesday 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 12 September 2026.
Sun 25/1007:07 -
Nonstop3h 03m
Sun 1/1107:23 -
Nonstop2h 51m
Deal found 10/9£112
Sat 10/1018:42 -
Nonstop3h 06m
Sat 17/1020:00 -
Nonstop2h 55m
Deal found 10/9£116
Fri 16/1013:07 -
Nonstop3h 05m
Sun 18/1007:08 -
Nonstop2h 54m
Deal found 10/9£117
Sat 24/1017:45 -
1 stop6h 41m
Sat 31/1008:30 -
Nonstop2h 44m
Deal found 10/9£120
Sat 24/1018:42 -
Nonstop3h 06m
Mon 26/1023:50 -
1 stop9h 12m
Deal found 10/9£124
Sat 7/1119:45 -
Nonstop3h 05m
Tue 10/1105:40 -
2 stops9h 50m
Deal found 10/9£127
Thu 12/1118:15 -
1 stop6h 42m
Fri 13/1117:40 -
1 stop4h 29m
Deal found 10/9£131
Tue 27/1017:20 -
1 stop5h 25m
Thu 29/1006:15 -
2 stops7h 30m
Deal found 10/9£132
Tue 20/1009:03 -
2 stops10h 42m
Sat 24/1016:27 -
Nonstop2h 50m
Deal found 11/9£132
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 12 September 2026.
Fri 13/1121:07 -
Nonstop3h 08m
Tue 17/1108:30 -
Nonstop2h 44m
Deal found 9/9£116
Fri 2/1018:28 -
Nonstop3h 12m
Mon 12/1020:00 -
Nonstop2h 55m
Deal found 10/9£116
Fri 13/1114:30 -
1 stop7h 40m
Tue 17/1106:10 -
Nonstop2h 35m
Deal found 9/9£123
Tue 27/1017:57 -
Nonstop3h 01m
Thu 29/1013:16 -
Nonstop2h 43m
Deal found 10/9£149
Sun 25/1006:00 -
Nonstop3h 10m
Sun 1/1107:45 -
1 stop9h 01m
Deal found 10/9£123
Thu 29/1006:00 -
Nonstop3h 10m
Sun 1/1109:45 -
1 stop7h 01m
Deal found 9/9£123
Fri 23/1016:18 -
1 stop8h 41m
Mon 26/1023:50 -
1 stop9h 12m
Deal found 10/9£131
Sat 24/1015:40 -
Nonstop2h 57m
Tue 27/1015:49 -
Nonstop2h 41m
Deal found 9/9£183
Tue 10/1107:40 -
Nonstop3h 07m
Wed 18/1112:20 -
1 stop8h 07m
Deal found 10/9£187
Fri 25/1215:06 -
Nonstop3h 08m
Tue 29/1213:53 -
Nonstop2h 40m
Deal found 8/9£225
Tue 20/1008:50 -
2 stops7h 05m
Sat 24/1005:25 -
1 stop8h 10m
Deal found 11/9£235
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 12 September 2026.
Sun 25/1007:07 -
Nonstop3h 03m
Sun 1/1107:23 -
Nonstop2h 51m
Deal found 10/9£112
Sat 10/1018:42 -
Nonstop3h 06m
Sat 17/1020:00 -
Nonstop2h 55m
Deal found 10/9£116
Fri 16/1013:07 -
Nonstop3h 05m
Sun 18/1007:08 -
Nonstop2h 54m
Deal found 10/9£117
Thu 1/1006:00 -
Nonstop2h 59m
Thu 1/1020:00 -
Nonstop2h 47m
Deal found 10/9£131
Fri 2/1014:05 -
Nonstop2h 58m
Sun 11/1018:05 -
Nonstop2h 44m
Deal found 9/9£136
Sun 4/1008:02 -
Nonstop2h 59m
Sun 11/1018:05 -
Nonstop2h 44m
Deal found 9/9£137
Wed 7/1019:14 -
Nonstop3h 01m
Wed 14/1005:00 -
Nonstop2h 45m
Deal found 9/9£146
Tue 27/1017:57 -
Nonstop3h 01m
Thu 29/1013:16 -
Nonstop2h 43m
Deal found 10/9£149
Sun 4/1008:02 -
Nonstop2h 59m
Mon 12/1018:05 -
Nonstop2h 44m
Deal found 10/9£152
Sun 22/1107:40 -
Nonstop3h 07m
Tue 24/1105:05 -
Nonstop2h 37m
Deal found 9/9£164
Sat 30/107:00 -
Nonstop3h 09m
Thu 11/215:45 -
Nonstop2h 46m
Deal found 10/9£168
Sun 11/1020:58 -
Nonstop3h 01m
Sun 18/1005:00 -
Nonstop2h 45m
Deal found 10/9£171
Last-minute flights from Denver to Seattle
Discover last-minute flight deals from Denver to Seattle. Data last updated 12 September 2026 and is based on user searches.
Sat 10/1018:42 -
Nonstop3h 06m
Sat 17/1020:00 -
Nonstop2h 55m
Deal found 10/9£116
Sat 10/1018:42 -
Nonstop3h 06m
Wed 14/1020:00 -
Nonstop2h 55m
Deal found 10/9£131
Fri 16/1013:07 -
Nonstop3h 05m
Sun 18/1007:08 -
Nonstop2h 54m
Deal found 10/9£117
Tue 20/1009:03 -
2 stops10h 42m
Sat 24/1016:27 -
Nonstop2h 50m
Deal found 11/9£132
Sat 24/1017:45 -
1 stop6h 41m
Sat 31/1008:30 -
Nonstop2h 44m
Deal found 10/9£120
Sat 24/1018:42 -
Nonstop3h 06m
Mon 26/1023:50 -
1 stop9h 12m
Deal found 10/9£124
Sat 24/1012:30 -
2 stops10h 10m
Sat 31/1006:15 -
Nonstop2h 40m
Deal found 10/9£127
Sun 25/1007:07 -
Nonstop3h 03m
Sun 1/1107:23 -
Nonstop2h 51m
Deal found 10/9£112
Tue 27/1017:20 -
1 stop5h 25m
Thu 29/1006:15 -
2 stops7h 30m
Deal found 10/9£132
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 12 September 2026.
Mon 12/1006:00 -
Nonstop3h 10m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 10/9£66
Fri 6/1119:15 -
2 stops7h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 10/9£69
Mon 5/1020:58 -
Nonstop3h 01m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/9£75
Thu 1/1006:00 -
Nonstop2h 59m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/9£75
Sun 4/1020:58 -
Nonstop3h 01m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/9£82
Tue 22/1221:10 -
Nonstop3h 06m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 10/9£86
Wed 23/1221:10 -
Nonstop3h 06m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 10/9£88
Thu 11/208:00 -
Nonstop2h 59m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 10/9£92
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 12 September 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 7,457,451 searches. Data last updated 12 September 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 Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Sun 8/11
05:25-09:10
1 stop4h 45m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£66
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Sat 14/11
12:05-18:35
1 stop7h 30m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£66
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Thu 22/10
05:25-09:10
1 stop4h 45m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£66
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Sun 18/10
06:00-08:10
Nonstop3h 10m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£66
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Mon 12/10
05:25-09:10
1 stop4h 45m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£66
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Fri 6/11
19:15-01:15
2 stops7h 00m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£69
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Mon 8/3
16:00-23:59
1 stop8h 59m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£73
Fastest return journey
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Tue 9/3
09:00-11:03
Nonstop3h 03m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£106
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Thu 12/11
20:55-23:05
Nonstop3h 10m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£110
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Wed 10/3
05:15-10:21
1 stop6h 06m
Seattle/Tacoma Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£114
Flights are sorted by cheapest return flights first.
Deals found on 9/9
Showing 1-10 of 23 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 £102). Flying from Denver to Seattle in July is currently the most expensive (average of £240). 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 12 September 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?
Airfare is below average for this route at the moment.
Denver to Seattle flights typically cost between £146 and £279 in October.The cheapest return price found within the last 5 days was £112 on Alaska Airlines (25 Oct–1 Nov).
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 12 September 2026.
The most flights from DEN to SEA are scheduled on a Friday (45 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (11 on average).
How often are flights from Denver to Seattle delayed?
About 17% 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, Frontier have had the lowest number of delays on this route, with just 11% of flights being delayed.
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.
How popular is this Denver to Seattle flight route?
The Denver Intl to Seattle/Tacoma Intl flight path was viewed by 11 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 08m. Denver and Seattle are separated by a distance of 1022 mi. Generally, flights for this route are direct.
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: Frontier (90%), Korean Air (90%), Volaris (90%).
Can I find deals for flights from Denver to Seattle that include hotel bookings?
Yes. In addition to deals on Denver to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Denver to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Seattle.
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 £102). Flying from Denver to Seattle in July is currently the most expensive (average of £240). 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.
Browse through other flights departing from Denver. Flights are based on user searches made on Cheapflights and were last updated on 12 September 2026.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 September 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.