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 18/11. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
30 Sep — 7 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 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 31 August 2026.
Thu 15/1013:07 -
Nonstop3h 05m
Thu 22/1016:27 -
Nonstop2h 50m
Deal found 31/8£157
Sat 24/1007:07 -
Nonstop3h 03m
Sat 24/1011:31 -
1 stop9h 41m
Deal found 31/8£185
Sat 5/1207:00 -
Nonstop3h 05m
Sat 5/1211:41 -
1 stop5h 52m
Deal found 28/8£193
Wed 14/1018:59 -
1 stop15h 29m
Sat 24/1007:04 -
1 stop9h 57m
Deal found 27/8£194
Sun 25/1007:07 -
Nonstop3h 03m
Sun 25/1011:31 -
1 stop11h 28m
Deal found 31/8£197
Tue 6/1018:59 -
1 stop24h 03m
Sat 10/1013:16 -
Nonstop2h 43m
Deal found 27/8£203
Mon 5/1018:59 -
1 stop21h 18m
Tue 6/1018:54 -
Nonstop2h 43m
Deal found 28/8£205
Tue 10/1115:25 -
Nonstop3h 02m
Tue 17/1111:43 -
1 stop6h 36m
Deal found 28/8£211
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 31 August 2026.
Tue 6/1008:50 -
2 stops7h 05m
Sat 10/1006:15 -
Nonstop2h 40m
Deal found 27/8£220
Fri 25/1212:27 -
1 stop7h 23m
Tue 29/1219:57 -
Nonstop2h 49m
Deal found 28/8£239
Mon 23/1114:00 -
1 stop7h 45m
Wed 25/1120:40 -
Nonstop2h 35m
Deal found 29/8£223
Sat 20/216:25 -
1 stop5h 25m
Mon 22/200:15 -
2 stops11h 25m
Deal found 31/8£228
Sat 10/1016:15 -
2 stops7h 10m
Tue 13/1007:05 -
1 stop5h 15m
Deal found 31/8£230
Tue 1/1213:55 -
2 stops8h 35m
Tue 8/1211:35 -
2 stops8h 25m
Deal found 28/8£234
Fri 13/1113:50 -
1 stop5h 10m
Tue 17/1105:40 -
2 stops9h 50m
Deal found 30/8£235
Sat 21/1118:35 -
1 stop6h 10m
Fri 27/1105:30 -
2 stops8h 30m
Deal found 29/8£238
Thu 15/1013:45 -
2 stops8h 15m
Thu 22/1007:40 -
1 stop8h 45m
Deal found 31/8£238
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 31 August 2026.
Thu 15/1013:07 -
Nonstop3h 05m
Thu 22/1016:27 -
Nonstop2h 50m
Deal found 31/8£157
Tue 10/1115:25 -
Nonstop3h 02m
Sat 14/1118:59 -
Nonstop2h 39m
Deal found 27/8£212
Tue 27/1017:57 -
Nonstop3h 01m
Thu 29/1013:16 -
Nonstop2h 43m
Deal found 27/8£216
Tue 27/1012:00 -
Nonstop2h 59m
Fri 30/1013:16 -
Nonstop2h 43m
Deal found 26/8£219
Thu 19/1118:37 -
Nonstop3h 04m
Fri 27/1120:16 -
Nonstop2h 43m
Deal found 31/8£223
Fri 18/1206:00 -
Nonstop3h 10m
Tue 5/107:05 -
Nonstop2h 44m
Deal found 31/8£225
Fri 11/1212:49 -
Nonstop3h 01m
Fri 8/110:12 -
Nonstop2h 45m
Deal found 31/8£227
Fri 25/919:16 -
Nonstop3h 01m
Mon 28/918:05 -
Nonstop2h 44m
Deal found 27/8£229
Sun 8/1118:42 -
Nonstop3h 06m
Wed 18/1108:30 -
Nonstop2h 47m
Deal found 28/8£231
Fri 25/918:50 -
Nonstop3h 00m
Fri 2/1016:15 -
Nonstop2h 45m
Deal found 28/8£233
Fri 23/1006:00 -
Nonstop3h 10m
Tue 27/1009:05 -
Nonstop2h 44m
Deal found 31/8£234
Thu 3/1218:34 -
Nonstop3h 11m
Sun 6/1208:30 -
Nonstop2h 52m
Deal found 28/8£235
Last-minute flights from Denver to Seattle
Discover last-minute flight deals from Denver to Seattle. Data last updated 31 August 2026 and is based on user searches.
Mon 21/920:55 -
Nonstop3h 05m
Thu 24/914:10 -
1 stop6h 05m
Deal found 31/8£227
Thu 24/917:41 -
Nonstop3h 00m
Mon 28/920:49 -
1 stop14h 31m
Deal found 29/8£214
Thu 24/915:40 -
Nonstop2h 55m
Thu 1/1016:15 -
Nonstop2h 45m
Deal found 27/8£219
Thu 24/906:20 -
1 stop13h 32m
Thu 1/1019:32 -
Nonstop2h 47m
Deal found 27/8£222
Thu 24/913:00 -
Nonstop2h 55m
Sun 27/905:15 -
Nonstop2h 35m
Deal found 30/8£235
Fri 25/920:06 -
1 stop15h 19m
Mon 28/920:49 -
1 stop14h 31m
Deal found 27/8£209
Fri 25/919:16 -
Nonstop3h 01m
Mon 28/918:05 -
Nonstop2h 44m
Deal found 27/8£229
Fri 25/918:50 -
Nonstop3h 00m
Fri 2/1016:15 -
Nonstop2h 45m
Deal found 28/8£233
Sat 26/911:40 -
2 stops10h 15m
Sat 3/1011:40 -
2 stops9h 55m
Deal found 28/8 £234
Tue 29/916:15 -
Nonstop2h 55m
Tue 20/1013:25 -
Nonstop2h 40m
Deal found 28/8£212
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 31 August 2026.
Tue 27/1011:50 -
Nonstop3h 04m
Deal found 28/8£106
Thu 12/1120:55 -
Nonstop3h 05m
Deal found 28/8£110
Wed 16/1212:35 -
2 stops7h 05m
Deal found 27/8£114
Sat 24/1012:30 -
2 stops10h 10m
Deal found 28/8£117
Fri 25/914:05 -
Nonstop2h 58m
Deal found 28/8£120
Fri 27/1107:15 -
1 stop6h 45m
Deal found 27/8£121
Tue 22/906:20 -
2 stops10h 38m
Deal found 27/8£123
Fri 2/1013:45 -
2 stops8h 15m
Deal found 28/8£125
Sun 1/1107:03 -
Nonstop3h 04m
Deal found 28/8£126
Fri 12/207:00 -
1 stop8h 30m
Deal found 27/8£127
Sun 17/117:52 -
1 stop6h 39m
Deal found 28/8£129
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 31 August 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 31 August 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
Fastest return journey
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Tue 6/10
08:50-14:55
2 stops7h 05m
Seattle/Tacoma Intl
Sat 10/10
06:15-09:55
Nonstop2h 40m
£220
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Mon 23/11
14:00-20:45
1 stop7h 45m
Seattle/Tacoma Intl
Wed 25/11
20:40-00:15
Nonstop2h 35m
£223
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Sat 20/2
16:25-20:50
1 stop5h 25m
Seattle/Tacoma Intl
Mon 22/2
00:15-12:40
2 stops11h 25m
£228
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Sat 10/10
16:15-22:25
2 stops7h 10m
Seattle/Tacoma Intl
Tue 13/10
07:05-13:20
1 stop5h 15m
£230
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Tue 1/12
13:55-21:30
2 stops8h 35m
Seattle/Tacoma Intl
Tue 8/12
11:35-21:00
2 stops8h 25m
£234
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Fri 13/11
13:50-18:00
1 stop5h 10m
Seattle/Tacoma Intl
Tue 17/11
05:40-16:30
2 stops9h 50m
£235
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Sat 21/11
18:35-23:45
1 stop6h 10m
Seattle/Tacoma Intl
Fri 27/11
05:30-15:00
2 stops8h 30m
£238
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Thu 15/10
13:45-21:00
2 stops8h 15m
Seattle/Tacoma Intl
Thu 22/10
07:40-17:25
1 stop8h 45m
£238
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Fri 25/12
12:27-18:50
1 stop7h 23m
Seattle/Tacoma Intl
Tue 29/12
19:57-23:46
Nonstop2h 49m
£239
Cheapest one-way
DenverSeattle
DEN Denver Intl - SEA Seattle/Tacoma Intl
DENSEA
Denver Intl
Wed 18/11
21:07-23:15
Nonstop3h 08m
£106
Flights are sorted by cheapest return flights first.
Deals found on 28/8
Showing 1-10 of 20 resultsSorted by cheapest first
1
2
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 31 August 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 typical for this route at the moment.
Denver to Seattle flights typically cost between £133 and £260 in October.The cheapest return price found within the last 5 days was £157 on Frontier (15 Oct–22 Oct).
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 31 August 2026.
The most flights from DEN to SEA are scheduled on a Saturday (43 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 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 140 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 12% 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 31 August 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 27 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 01m.
How popular is this Denver to Seattle flight route?
The Denver Intl to Seattle/Tacoma Intl flight path was viewed by 13 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 7h 05m. Denver and Seattle are separated by a distance of 1022 mi.
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 £64. Frontier is priced at 62% 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 (92%), Frontier (87%), Volaris (87%).
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.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 31 August 2026.
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 7,457,451 searches. Data last updated 31 August 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.