Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Seattle to Denver from £37

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 17/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
16 Dec — 23 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Denver Intl are usually found in January or October, booked 77 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Find flight deals from Seattle to Denver

Enter your travel dates to find the best prices.

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 16 November 2025.

Wed 10/1207:55SEA - DEN
Nonstop2h 49mAlaska Airlines
Sun 14/1206:00DEN - SEA
Nonstop3h 10mAlaska Airlines
Deal found 15/11£75
Tue 9/1207:55SEA - DEN
Nonstop2h 49mAlaska Airlines
Tue 9/1215:42DEN - SEA
Nonstop3h 08mAlaska Airlines
Deal found 14/11£78
Wed 17/1207:40SEA - DEN
Nonstop2h 52mDelta
Mon 5/106:29DEN - SEA
Nonstop3h 11mDelta
Deal found 15/11£81
Wed 10/1207:40SEA - DEN
Nonstop2h 52mDelta
Fri 12/1219:45DEN - SEA
Nonstop3h 16mDelta
Deal found 14/11£83
Sun 14/1205:35SEA - DEN
Nonstop2h 35mSouthwest
Sun 21/1222:35DEN - SEA
Nonstop3h 00mSouthwest
Deal found 15/11£86
Wed 10/1213:40SEA - DEN
1 stop4h 18mDelta
Sun 14/1206:05DEN - SEA
Nonstop3h 10mDelta
Deal found 14/11£89
Sun 7/1207:55SEA - DEN
Nonstop2h 49mAlaska Airlines
Tue 9/1211:41DEN - SEA
1 stop6h 54mAlaska Airlines
Deal found 13/11£90
Thu 18/1220:17SEA - DEN
Nonstop2h 42mAlaska Airlines
Thu 25/1211:31DEN - SEA
1 stop5h 30mAlaska Airlines
Deal found 13/11£96
Wed 10/1210:50SEA - DEN
1 stop6h 10mSouthwest
Sun 14/1222:35DEN - SEA
Nonstop3h 00mSouthwest
Deal found 14/11£101
Sat 6/1205:05SEA - DEN
1 stop5h 00mDelta
Sat 13/1212:00DEN - SEA
1 stop5h 54mDelta
Deal found 15/11£104
Thu 11/1206:15SEA - DEN
2 stops6h 55mSouthwest
Mon 15/1220:55DEN - SEA
Nonstop3h 00mSouthwest
Deal found 14/11£105

Cheap 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 16 November 2025.

Round-trip from

£75

One-way from

£37

Popular in

December

Cheapest in

January

Average price

£171
Alaska Airlines
  • Alaska Airlines
  • 10/12-14/12
  • Nonstop
  • 5h 59m total
  • Seattle to Denver
Search Deals
Delta
  • Delta
  • 14/12
  • Nonstop
  • 2h 52m total
  • Seattle to Denver
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£1 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 16 November 2025.
Use the filters below to find and compare flights from Seattle to Denver that are best for you.

Fly from

Seattle

Fly to

Denver

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 10/12

07:40-11:32

Nonstop2h 52m

Denver Intl

Wed 10/12

19:45-22:01

Nonstop3h 16m

£83

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 7/12

07:40-11:32

Nonstop2h 52m

Denver Intl

Tue 9/12

19:45-22:01

Nonstop3h 16m

£83

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 3/3

17:40-21:23

Nonstop2h 43m

Denver Intl

Wed 4/3

12:34-14:41

Nonstop3h 07m

£89

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 1/3

20:14-23:59

Nonstop2h 45m

Denver Intl

Tue 3/3

07:00-09:10

Nonstop3h 10m

£89

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 22/1

19:40-23:25

Nonstop2h 45m

Denver Intl

Mon 26/1

06:29-08:40

Nonstop3h 11m

£89

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 10/3

17:40-21:23

Nonstop2h 43m

Denver Intl

Wed 11/3

12:34-14:41

Nonstop3h 07m

£89

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 30/12

19:35-23:23

Nonstop2h 48m

Denver Intl

Thu 1/1

06:05-08:20

Nonstop3h 15m

£89

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 23/2

19:40-23:25

Nonstop2h 45m

Denver Intl

Wed 25/2

12:30-14:43

Nonstop3h 13m

£89

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 17/2

19:40-23:25

Nonstop2h 45m

Denver Intl

Fri 20/2

06:29-08:40

Nonstop3h 11m

£89

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 5/12

07:40-11:32

Nonstop2h 52m

£42

Flights are sorted by cheapest return flights first.

Deals found on 15/11

Showing 1-10 of 19 results
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.
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 Seattle to Denver

How far ahead should I book a flight from Seattle to Denver?

Use this chart to determine the optimal time to book a return flight from Seattle to Denver. Price data was last updated on 14 November 2025.

The price you pay for your flight from Seattle to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 77 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 £35). Flying from Seattle to Denver in July is currently the most expensive (average of £83). 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 16 November 2025.

One of the essential ways to save on airfare from Seattle to Denver is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 47% on airfare.

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 16 November 2025.
Read through reviews of airlines operating flights from Seattle to Denver, such as Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,010 reviews
Check prices

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,010 reviews
Delta
7.9
Good
8,010 reviews
Check prices

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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?

    Denver Intl is the airport most travelers will use when flying to Denver from Seattle/Tacoma Intl. Booking flights from Seattle/Tacoma Intl (SEA) to Denver Intl (DEN) should be relatively easy as there are 23 daily flights to Denver from 1 airline. 2h 47m is how long a flight from Seattle to Denver Intl will take if you book a nonstop flight.

  • How popular is this Seattle to Denver flight route?

    Flights from Seattle/Tacoma Intl to Denver Intl have been viewed 6 times in the past calendar month.

  • How long is the flight from Seattle to Denver?

    Departing from Seattle to Denver will take you 2h 45m. The distance between Seattle and Denver is about 1022 mi. All flights are typically direct.

  • What is the cheapest airline to fly from Seattle to Denver round-trip?

    Flying on Delta is currently your cheapest option to Denver, with prices starting at £165.

  • What are the most reliable airlines from Seattle to Denver?

    No one likes to see their flight delayed. When booking a flight from Seattle to Denver consider choosing SWISS (100%), STARLUX Airlines (100%) or United Airlines (91%) as they are the most reliable in getting you off to your destination on time.

  • Can I find deals for flights from Seattle to Denver that include hotel bookings?

    Yes. In addition to deals on Seattle to Denver flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Denver.

  • 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 £35). Flying from Seattle to Denver in July is currently the most expensive (average of £83). 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.

See more FAQs

Travelling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Winter Park
Frisco

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Seattle to Denver

Discover the top airline 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 858,174 searches. Data last updated 16 November 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£165Average£233FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Fly with Cheapflights

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 Seattle to Denver?

Cheapflights makes it easy to find Seattle to Denver flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Denver?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Denver from Seattle.

Can Cheapflights find flights from Seattle to Denver with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Denver flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Denver become cheaper?

Of course! You can now track prices for flights from Seattle to Denver and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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.