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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
7 Mar — 14 Mar1
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 February or January, booked 39 days in advance, depart on a Monday or Tuesday and return on a Tuesday
Cheap flight deals from Denver to Seattle
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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 5 February 2026.
Wed 4/312:30
DEN
-
SEA
Nonstop3h 11m
Delta
Wed 11/313:35
SEA
-
DEN
Nonstop2h 53m
Delta
Deal found 2/2£115
Tue 17/312:34
DEN
-
SEA
Nonstop3h 07m
Alaska Airlines
Tue 17/317:40
SEA
-
DEN
Nonstop2h 43m
Alaska Airlines
Deal found 1/2£126
Thu 9/406:30
DEN
-
SEA
Nonstop3h 08m
Delta
Mon 13/420:00
SEA
-
DEN
Nonstop2h 50m
Delta
Deal found 3/2£129
Fri 6/317:20
DEN
-
SEA
Nonstop2h 55m
Southwest
Mon 9/305:15
SEA
-
DEN
2 stops10h 15m
Southwest
Deal found 3/2£133
Tue 7/417:57
DEN
-
SEA
1 stop6h 30m
United Airlines
Sat 11/415:48
SEA
-
DEN
Nonstop2h 51m
United Airlines
Deal found 5/2£134
Tue 17/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Sat 21/305:00
SEA
-
DEN
Nonstop2h 38m
United Airlines
Deal found 3/2£134
Wed 1/413:16
DEN
-
SEA
1 stop7h 36m
Alaska Airlines
Sat 11/420:11
SEA
-
DEN
Nonstop2h 45m
Alaska Airlines
Deal found 2/2£137
Fri 1/517:59
DEN
-
SEA
1 stop6h 30m
United Airlines
Sun 3/519:05
SEA
-
DEN
Nonstop2h 51m
United Airlines
Deal found 4/2£138
Thu 26/221:55
DEN
-
SEA
Nonstop3h 15m
Southwest
Sun 1/305:50
SEA
-
DEN
2 stops7h 00m
Southwest
Deal found 3/2£140
Fri 20/320:50
DEN
-
SEA
Nonstop3h 00m
Southwest
Fri 27/305:30
SEA
-
DEN
Nonstop2h 35m
Southwest
Deal found 3/2£144
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 5 February 2026.
Fri 6/320:50
DEN
-
SEA
Nonstop3h 00m
Southwest
Sun 8/306:00
SEA
-
DEN
Nonstop2h 40m
Southwest
Deal found 3/2£122
Fri 27/220:54
DEN
-
SEA
Nonstop3h 05m
United Airlines
Sat 7/305:00
SEA
-
DEN
Nonstop2h 38m
United Airlines
Deal found 4/2£122
Wed 25/212:30
DEN
-
SEA
Nonstop3h 11m
Delta
Sat 28/213:40
SEA
-
DEN
Nonstop2h 47m
Delta
Deal found 2/2£129
Tue 31/311:47
DEN
-
SEA
Nonstop3h 06m
Alaska Airlines
Mon 6/420:11
SEA
-
DEN
Nonstop2h 45m
Alaska Airlines
Deal found 4/2£129
Fri 20/320:54
DEN
-
SEA
Nonstop3h 05m
United Airlines
Thu 26/305:00
SEA
-
DEN
Nonstop2h 38m
United Airlines
Deal found 4/2£129
Sun 1/306:40
DEN
-
SEA
Nonstop3h 11m
Delta
Mon 16/313:36
SEA
-
DEN
Nonstop2h 54m
Delta
Deal found 4/2£129
Thu 26/219:52
DEN
-
SEA
Nonstop3h 08m
Alaska Airlines
Mon 2/308:30
SEA
-
DEN
Nonstop2h 44m
Alaska Airlines
Deal found 2/2£129
Wed 25/212:30
DEN
-
SEA
Nonstop3h 11m
Delta
Sun 1/319:40
SEA
-
DEN
Nonstop2h 45m
Delta
Deal found 4/2£129
Fri 20/320:50
DEN
-
SEA
Nonstop3h 00m
Southwest
Fri 27/305:30
SEA
-
DEN
Nonstop2h 35m
Southwest
Deal found 3/2£144
Wed 1/413:16
DEN
-
SEA
1 stop7h 36m
Alaska Airlines
Sun 12/420:11
SEA
-
DEN
Nonstop2h 45m
Alaska Airlines
Deal found 2/2£137
Sun 1/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Tue 31/305:00
SEA
-
DEN
Nonstop2h 44m
United Airlines
Deal found 2/2£137
Tue 17/307:00
DEN
-
SEA
Nonstop3h 10m
Alaska Airlines
Tue 17/313:56
SEA
-
DEN
1 stop9h 03m
Alaska Airlines
Deal found 1/2£137
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 5 February 2026.
Wed 4/312:30
DEN
-
SEA
Nonstop3h 11m
Delta
Wed 11/313:35
SEA
-
DEN
Nonstop2h 53m
Delta
Deal found 2/2£115
Tue 17/312:34
DEN
-
SEA
Nonstop3h 07m
Alaska Airlines
Tue 17/317:40
SEA
-
DEN
Nonstop2h 43m
Alaska Airlines
Deal found 1/2£126
Thu 9/406:30
DEN
-
SEA
Nonstop3h 08m
Delta
Mon 13/408:31
SEA
-
DEN
Nonstop2h 42m
Delta
Deal found 5/2£129
Tue 17/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Sat 21/305:00
SEA
-
DEN
Nonstop2h 38m
United Airlines
Deal found 3/2£134
Sun 1/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Tue 31/305:00
SEA
-
DEN
Nonstop2h 44m
United Airlines
Deal found 2/2£137
Sat 21/320:55
DEN
-
SEA
Nonstop3h 00m
Southwest
Sat 28/306:00
SEA
-
DEN
Nonstop2h 40m
Southwest
Deal found 3/2£150
Mon 16/319:52
DEN
-
SEA
Nonstop3h 08m
Alaska Airlines
Tue 17/313:36
SEA
-
DEN
Nonstop2h 44m
Alaska Airlines
Deal found 1/2£151
Fri 27/320:50
DEN
-
SEA
Nonstop3h 00m
Southwest
Sat 28/306:00
SEA
-
DEN
Nonstop2h 40m
Southwest
Deal found 1/2£158
Fri 13/306:30
DEN
-
SEA
Nonstop3h 06m
Delta
Wed 18/319:46
SEA
-
DEN
Nonstop2h 46m
Delta
Deal found 1/2£159
Tue 24/306:30
DEN
-
SEA
Nonstop3h 08m
Delta
Thu 26/319:46
SEA
-
DEN
Nonstop2h 46m
Delta
Deal found 4/2£159
Last-minute flights from Denver to Seattle
Discover last-minute flight deals from Denver to Seattle. Data last updated 5 February 2026 and is based on user searches.
Thu 26/221:55
DEN
-
SEA
Nonstop3h 15m
Southwest
Sun 1/305:50
SEA
-
DEN
2 stops7h 00m
Southwest
Deal found 5/2£140
Thu 26/210:55
DEN
-
SEA
1 stop8h 55m
Southwest
Sat 28/209:35
SEA
-
DEN
2 stops7h 15m
Southwest
Deal found 5/2£148
Sun 1/306:40
DEN
-
SEA
Nonstop3h 11m
Delta
Tue 3/319:40
SEA
-
DEN
Nonstop2h 45m
Delta
Deal found 3/2£129
Wed 4/312:30
DEN
-
SEA
Nonstop3h 11m
Delta
Wed 11/313:35
SEA
-
DEN
Nonstop2h 53m
Delta
Deal found 2/2£115
Fri 6/317:20
DEN
-
SEA
Nonstop2h 55m
Southwest
Mon 9/305:15
SEA
-
DEN
2 stops10h 15m
Southwest
Deal found 3/2£133
Tue 17/312:34
DEN
-
SEA
Nonstop3h 07m
Alaska Airlines
Tue 17/317:40
SEA
-
DEN
Nonstop2h 43m
Alaska Airlines
Deal found 1/2£126
Tue 17/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Sat 21/305:00
SEA
-
DEN
Nonstop2h 38m
United Airlines
Deal found 3/2£134
Fri 20/320:50
DEN
-
SEA
Nonstop3h 00m
Southwest
Fri 27/305:30
SEA
-
DEN
Nonstop2h 35m
Southwest
Deal found 3/2£144
Sat 21/320:55
DEN
-
SEA
Nonstop3h 00m
Southwest
Wed 25/313:45
SEA
-
DEN
1 stop8h 10m
Southwest
Deal found 4/2£137
Sat 21/320:55
DEN
-
SEA
Nonstop3h 00m
Southwest
Sat 28/306:00
SEA
-
DEN
Nonstop2h 40m
Southwest
Deal found 3/2£150
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 5 February 2026.
Tue 3/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Deal found 1/2£50
Sat 7/313:00
DEN
-
SEA
Nonstop3h 10m
Delta
Deal found 5/2£58
Wed 25/218:50
DEN
-
SEA
Nonstop3h 18m
Delta
Deal found 4/2£65
Tue 31/317:57
DEN
-
SEA
1 stop6h 30m
United Airlines
Deal found 4/2£69
Sun 22/320:54
DEN
-
SEA
Nonstop3h 05m
United Airlines
Deal found 4/2£70
Sat 7/320:10
DEN
-
SEA
1 stop6h 15m
Southwest
Deal found 4/2£72
Sat 28/215:15
DEN
-
SEA
2 stops7h 55m
Southwest
Deal found 4/2£76
Wed 20/505:20
DEN
-
SEA
1 stop6h 23m
United Airlines
Deal found 4/2£80
Mon 30/317:40
DEN
-
SEA
2 stops7h 30m
Southwest
Deal found 1/2£83
Sat 30/518:47
DEN
-
SEA
Nonstop3h 03m
Delta
Deal found 3/2£86
Fri 6/307:45
DEN
-
SEA
Nonstop3h 04m
United Airlines
Deal found 4/2£87
Sat 30/517:54
DEN
-
SEA
1 stop6h 27m
United Airlines
Deal found 4/2£90
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 5 February 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 5 February 2026.
Use the filters below to find and compare flights from Denver to Seattle that are best for you.
Fly from
Denver
Fly to
Seattle
Route
Depart
Return
Price
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Fri 6/3
20:50-22:50
Nonstop3h 00m
Seattle/Tacoma Intl
Sun 8/3
06:00-09:40
Nonstop2h 40m
£122
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Fri 27/2
20:54-22:59
Nonstop3h 05m
Seattle/Tacoma Intl
Sat 7/3
05:00-08:38
Nonstop2h 38m
£122
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Wed 25/2
12:30-14:41
Nonstop3h 11m
Seattle/Tacoma Intl
Sat 28/2
13:40-17:27
Nonstop2h 47m
£129
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Tue 31/3
11:47-13:53
Nonstop3h 06m
Seattle/Tacoma Intl
Mon 6/4
20:11-23:56
Nonstop2h 45m
£129
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Fri 20/3
20:54-22:59
Nonstop3h 05m
Seattle/Tacoma Intl
Thu 26/3
05:00-08:38
Nonstop2h 38m
£129
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Sun 1/3
06:40-08:51
Nonstop3h 11m
Seattle/Tacoma Intl
Mon 16/3
13:36-17:30
Nonstop2h 54m
£129
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Thu 26/2
19:52-22:00
Nonstop3h 08m
Seattle/Tacoma Intl
Mon 2/3
08:30-12:14
Nonstop2h 44m
£129
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Wed 25/2
12:30-14:41
Nonstop3h 11m
Seattle/Tacoma Intl
Sun 1/3
19:40-23:25
Nonstop2h 45m
£129
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Wed 1/4
13:16-19:52
1 stop7h 36m
Seattle/Tacoma Intl
Sun 12/4
20:11-23:56
Nonstop2h 45m
£137
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Sun 1/3
07:45-09:49
Nonstop3h 04m
Seattle/Tacoma Intl
Tue 31/3
05:00-08:44
Nonstop2h 44m
£137
Flights are sorted by cheapest return flights first.
Deals found on 1/2
Showing 1-10 of 24 results
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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?
Use this chart to determine the optimal time to book a return flight from Denver to Seattle. Price data was last updated on 30 January 2026.
To ensure you get the cheapest price possible for a flight from Denver to Seattle, you should look to book at least 39 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, February is the cheapest month in which you can book a flight from Denver to Seattle (average of £39). Flying from Denver to Seattle in July is currently the most expensive (average of £87). 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 5 February 2026.
It’s typically best to fly out from Denver to Seattle in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.
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 5 February 2026.
The most flights from DEN to SEA are scheduled on a Monday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).
How often are flights from Denver to Seattle delayed?
About 20% of weekly flights between Denver and Seattle have experienced delays in the past year, with the average delay time being 142 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?
Wednesday 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 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.
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 7 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 04m. 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: SkyWest Airlines (87%), ANA (85%), Japan Airlines (83%).
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, February is the cheapest month in which you can book a flight from Denver to Seattle (average of £39). Flying from Denver to Seattle in July is currently the most expensive (average of £87). 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 Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 5 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 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.
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