This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
15 Oct — 22 Oct1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Denver Intl are usually found in January or February, booked 74 days in advance, depart on a Thursday or Friday and return on a Wednesday
Cheap flight deals from Seattle to Denver
Enter your travel dates to find the best prices.
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One-way
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 15 September 2026.
Mon 26/104:27 p.m. -
Nonstop2h 50m
Mon 2/111:04 p.m. -
Nonstop3h 08m
Deal found 11/9C$ 192
Fri 30/105:50 a.m. -
Nonstop2h 40m
Fri 30/106:30 p.m. -
Nonstop3h 05m
Deal found 11/9C$ 218
Sat 10/105:00 a.m. -
Nonstop2h 45m
Sat 17/105:45 p.m. -
1 stop6h 42m
Deal found 10/9C$ 227
Tue 20/103:30 p.m. -
Nonstop2h 45m
Sat 24/101:05 p.m. -
1 stop8h 00m
Deal found 11/9C$ 232
Fri 9/108:00 p.m. -
Nonstop2h 55m
Mon 12/106:00 a.m. -
Nonstop3h 10m
Deal found 10/9C$ 246
Tue 20/104:27 p.m. -
Nonstop2h 50m
Sat 24/101:07 p.m. -
Nonstop3h 05m
Deal found 12/9C$ 252
Wed 7/107:25 p.m. -
1 stop21h 36m
Tue 13/1010:55 p.m. -
1 stop20h 50m
Deal found 11/9C$ 256
Fri 2/108:00 p.m. -
Nonstop2h 47m
Tue 6/1012:22 p.m. -
1 stop9h 05m
Deal found 10/9C$ 260
Wed 14/105:00 a.m. -
Nonstop2h 45m
Tue 20/108:02 a.m. -
Nonstop2h 59m
Deal found 14/9C$ 271
Best flights from Seattle to Denver
Discover carefully curated flight deals from Seattle to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 15 September 2026.
Tue 3/119:05 a.m. -
Nonstop2h 44m
Tue 10/111:14 p.m. -
Nonstop3h 11m
Deal found 15/9C$ 271
Wed 21/103:30 p.m. -
Nonstop2h 45m
Sat 24/108:45 a.m. -
2 stops7h 50m
Deal found 14/9C$ 295
Tue 10/1110:06 a.m. -
Nonstop2h 52m
Sat 14/116:37 p.m. -
Nonstop3h 04m
Deal found 11/9C$ 426
Tue 16/27:40 a.m. -
2 stops6h 55m
Fri 19/212:05 p.m. -
1 stop7h 05m
Deal found 15/9C$ 376
Mon 7/1210:09 a.m. -
Nonstop2h 44m
Thu 10/127:24 p.m. -
Nonstop3h 16m
Deal found 13/9C$ 441
Fri 19/28:55 p.m. -
Nonstop2h 30m
Mon 22/25:20 p.m. -
2 stops7h 30m
Deal found 15/9C$ 405
Sat 10/104:15 p.m. -
1 stop5h 35m
Mon 19/1012:45 p.m. -
2 stops8h 20m
Deal found 15/9C$ 420
Tue 20/107:30 a.m. -
2 stops8h 30m
Sat 24/106:40 a.m. -
1 stop7h 50m
Deal found 12/9C$ 448
Thu 11/25:00 a.m. -
2 stops8h 35m
Mon 15/212:50 p.m. -
1 stop6h 45m
Deal found 11/9C$ 448
Wed 7/107:30 a.m. -
2 stops8h 30m
Tue 13/108:50 a.m. -
2 stops7h 05m
Deal found 11/9C$ 449
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 15 September 2026.
Mon 26/104:27 p.m. -
Nonstop2h 50m
Mon 2/111:04 p.m. -
Nonstop3h 08m
Deal found 11/9C$ 192
Fri 30/106:54 p.m. -
Nonstop2h 43m
Tue 3/117:03 a.m. -
Nonstop3h 04m
Deal found 11/9C$ 218
Fri 9/108:00 p.m. -
Nonstop2h 55m
Mon 12/106:00 a.m. -
Nonstop3h 10m
Deal found 10/9C$ 246
Tue 20/104:27 p.m. -
Nonstop2h 50m
Sat 24/101:07 p.m. -
Nonstop3h 05m
Deal found 12/9C$ 252
Sat 21/114:37 p.m. -
Nonstop2h 48m
Mon 23/111:14 p.m. -
Nonstop3h 08m
Deal found 14/9C$ 259
Wed 14/105:00 a.m. -
Nonstop2h 45m
Tue 20/108:02 a.m. -
Nonstop2h 59m
Deal found 14/9C$ 271
Sat 24/1010:55 a.m. -
Nonstop2h 40m
Tue 3/113:40 p.m. -
Nonstop3h 10m
Deal found 13/9C$ 274
Tue 20/103:30 p.m. -
Nonstop2h 45m
Sat 24/107:40 p.m. -
Nonstop3h 05m
Deal found 11/9C$ 281
Wed 7/104:27 p.m. -
Nonstop2h 54m
Tue 13/101:07 p.m. -
Nonstop3h 05m
Deal found 11/9C$ 291
Thu 29/109:05 a.m. -
Nonstop2h 44m
Tue 3/116:42 p.m. -
Nonstop3h 06m
Deal found 14/9C$ 316
Sun 11/106:05 p.m. -
Nonstop2h 44m
Sun 18/108:02 a.m. -
Nonstop2h 59m
Deal found 10/9C$ 319
Last-minute flights from Seattle to Denver
Discover last-minute flight deals from Seattle to Denver. Data last updated 15 September 2026 and is based on user searches.
Fri 2/108:00 p.m. -
Nonstop2h 47m
Tue 6/1012:22 p.m. -
1 stop9h 05m
Deal found 10/9C$ 260
Wed 7/107:25 p.m. -
1 stop21h 36m
Tue 13/1010:55 p.m. -
1 stop20h 50m
Deal found 11/9C$ 256
Fri 9/108:00 p.m. -
Nonstop2h 55m
Sun 11/106:00 a.m. -
Nonstop3h 10m
Deal found 11/9C$ 246
Sat 10/105:00 a.m. -
Nonstop2h 45m
Sat 17/105:45 p.m. -
1 stop6h 42m
Deal found 10/9C$ 227
Wed 14/105:00 a.m. -
Nonstop2h 45m
Tue 20/108:02 a.m. -
Nonstop2h 59m
Deal found 14/9C$ 271
Tue 20/103:30 p.m. -
Nonstop2h 45m
Sat 24/101:05 p.m. -
1 stop8h 00m
Deal found 11/9C$ 232
Tue 20/104:27 p.m. -
Nonstop2h 50m
Sat 24/101:07 p.m. -
Nonstop3h 05m
Deal found 12/9C$ 252
Mon 26/104:27 p.m. -
Nonstop2h 50m
Mon 2/111:04 p.m. -
Nonstop3h 08m
Deal found 11/9C$ 192
Fri 30/105:50 a.m. -
Nonstop2h 40m
Fri 30/106:30 p.m. -
Nonstop3h 05m
Deal found 11/9C$ 218
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 15 September 2026.
Tue 20/108:00 p.m. -
1 stop20h 34m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 15/9C$ 122
Sat 24/105:25 a.m. -
1 stop8h 10m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 11/9C$ 124
Sat 21/114:37 p.m. -
Nonstop2h 48m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 14/9C$ 131
Mon 12/1010:53 a.m. -
1 stop27h 25m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 11/9C$ 135
Wed 14/108:00 p.m. -
Nonstop2h 55m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 15/9C$ 136
Tue 15/121:35 p.m. -
Nonstop2h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 14/9C$ 138
Sat 14/1112:20 p.m. -
1 stop8h 07m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 14/9C$ 143
Tue 29/123:24 p.m. -
1 stop8h 10m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 14/9C$ 152
Wed 28/108:55 a.m. -
2 stops9h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 15/9C$ 157
Mon 2/1112:15 a.m. -
2 stops12h 30m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 13/9C$ 166
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 15 September 2026.
Customize 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 7,457,451 searches. Data last updated 15 September 2026.
Use the filters below to find and compare flights from Seattle to Denver that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest round-trip
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Sat 24/10
5:25 a.m.-2:35 p.m.
1 stop8h 10m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 124
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Wed 7/10
5:00 a.m.-8:45 a.m.
Nonstop2h 45m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 136
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Tue 13/10
2:30 p.m.-11:53 p.m.
1 stop8h 23m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 150
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Wed 3/3
8:50 a.m.-5:10 p.m.
2 stops7h 20m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 159
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Mon 9/11
7:59 p.m.-11:47 p.m.
Nonstop2h 48m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 181
Quickest round-trip
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Thu 3/12
6:10 a.m.-9:45 a.m.
Nonstop2h 35m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 182
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Thu 22/10
5:30 a.m.-11:56 a.m.
1 stop5h 26m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 195
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Thu 29/10
7:15 a.m.-3:55 p.m.
1 stop7h 40m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 195
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Tue 23/2
7:10 p.m.-10:55 p.m.
Nonstop2h 45m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 200
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Thu 12/11
7:55 a.m.-5:05 p.m.
2 stops8h 10m
Denver Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 202
Flights are sorted by cheapest round-trip flights first.
Deals found on 11/9
Showing 1-10 of 20 resultsSorted by cheapest first
1
2
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 round-trip 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?
The best time to book flights from Seattle to Denver is 73 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 C$ 221). Flying from Seattle to Denver in June is currently the most expensive (average of C$ 470). 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 15 September 2026.
Unlike in the evening, when flights are generally more expensive, you can save up to 10% on flights from Seattle to Denver by exploring options for tickets in the afternoon.
What is the cheapest day to fly from Seattle to Denver?
Use this chart to determine the cheapest time to fly round-trip from Seattle to Denver. Price data was last updated on 12 September 2026.
Travelers seeking maximum savings on their Seattle to Denver flight should consider departing on Sunday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost to fly round-trip from Seattle to Denver?
Airfare is below average for this route at the moment.
Seattle to Denver flights typically cost between C$ 253 and C$ 483 in October.The cheapest round-trip price found within the last 5 days was C$ 192 on Frontier (26 Oct-2 Nov).
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 15 September 2026.
The most flights from SEA to DEN are scheduled on a Monday (40 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).
How often are flights from Seattle to Denver delayed?
About 17% of weekly flights between Seattle and Denver have experienced delays in the past year, with the average delay time being 138 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 Friday 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 has had the lowest number of delays on this route, with just 8% of flights being delayed.
Reviews of airlines servicing Denver
Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated 15 September 2026.
Read through reviews of airlines operating flights from Seattle to Denver, such as Southwest,Alaska Airlines, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
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.
What airports do I use to fly from Seattle to Denver?
Booking a flight from Seattle/Tacoma Intl (SEA) to Denver Intl (DEN) is your only option if you wish to fly from Seattle to Denver. On a typical day, there are 22 flights from Seattle/Tacoma Intl to Denver Intl, all of which are around 2h 40m for a nonstop flight. You can also purchase a plane ticket from 4 airlines when you book a flight from Seattle/Tacoma Intl to Denver.
How popular is this Seattle to Denver flight route?
This flight path from Seattle/Tacoma Intl to Denver Intl was viewed by 93 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 Seattle to Denver?
There are many flights that can get you from Seattle to Denver in 2h 30m. Fly via Delta or Southwest to get the fastest option. There are 1645 km between Seattle and Denver. All flights are typically direct.
What are the cheapest airlines flying from Seattle to Denver round-trip?
According to our current data, Frontier (C$ 78), Delta (C$ 81), and Southwest (C$ 139) offers the cheapest pricing from Seattle to Denver. Users have found that Frontier is 77% cheaper than the other options available to this destination.
What are the most reliable airlines from Seattle to Denver?
Before booking your flight to Denver from Seattle, check out the most reliable airlines to get you to your destination on time: Copa Airlines (77%), Qatar Airways (77%), United Airlines( 76%).
What are the cheapest flights from Seattle to Denver?
Looking for the cheapest flight from Seattle to Denver? While on average our users pay C$ 296, our data indicates the cheapest price to be C$ 109. The most popular route (Seattle/Tacoma Intl - Denver Intl), is priced around C$ 256.
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 C$ 221). Flying from Seattle to Denver in June is currently the most expensive (average of C$ 470). 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 15 September 2026.
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on 15 September 2026.
Discover the top 4 airlines that operate flights from Seattle to Denver. 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 15 September 2026.
Find the best flight deals on Cheapflights, where travelers 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 helps you search for flights from Seattle to Denver via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Seattle to Denver?
Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Denver for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from Seattle to Denver with no change fees?
Yes! Cheapflights helps users easily find flights from Seattle to Denver with no change fees.
Can Cheapflights notify me if prices for flights from Seattle to Denver become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Denver from Seattle today and book when prices fit your budget.
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