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Cheap flights from Seattle to Denver from £75

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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
5 May — 12 May1
1 adult
1 adult, Economy, 0 bags

Cheap 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 5 April 2026.

Sat 9/518:00
SEA
-
DEN
Nonstop2h 49m
Alaska Airlines
Tue 12/506:00
DEN
-
SEA
Nonstop3h 03m
Alaska Airlines
Deal found 2/4£149
Wed 3/608:58
SEA
-
DEN
Nonstop2h 47m
United Airlines
Sat 6/617:54
DEN
-
SEA
1 stop6h 25m
United Airlines
Deal found 3/4£154
Tue 28/408:35
SEA
-
DEN
Nonstop2h 42m
Delta
Fri 1/506:55
DEN
-
SEA
Nonstop3h 06m
Delta
Deal found 3/4£157
Sat 2/505:45
SEA
-
DEN
Nonstop2h 40m
Southwest
Tue 5/514:50
DEN
-
SEA
2 stops7h 10m
Southwest
Deal found 3/4£157
Tue 5/507:50
SEA
-
DEN
2 stops8h 20m
Southwest
Wed 6/509:00
DEN
-
SEA
Nonstop2h 55m
Southwest
Deal found 2/4£161
Sat 9/507:50
SEA
-
DEN
Nonstop2h 59m
Delta
Wed 13/506:05
DEN
-
SEA
Nonstop3h 04m
Delta
Deal found 31/3£164
Tue 5/507:35
SEA
-
DEN
1 stop8h 25m
Southwest
Tue 12/514:50
DEN
-
SEA
2 stops7h 10m
Southwest
Deal found 3/4£165
Tue 12/507:05
SEA
-
DEN
Nonstop2h 49m
Alaska Airlines
Tue 12/513:02
DEN
-
SEA
1 stop9h 43m
Alaska Airlines
Deal found 2/4£167
Wed 6/511:35
SEA
-
DEN
1 stop5h 40m
Southwest
Sat 9/510:30
DEN
-
SEA
2 stops10h 10m
Southwest
Deal found 2/4£168
Sat 9/519:59
SEA
-
DEN
Nonstop2h 53m
Delta
Mon 11/506:05
DEN
-
SEA
Nonstop3h 04m
Delta
Deal found 1/4£172

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 5 April 2026.

Round-trip from

£149

One-way from

£75

Popular in

June

Cheapest in

January

Average price

£173

Good one-way deal

£78 or less
Delta
  • Delta
  • 16/5-20/5
  • Nonstop
  • 6h 03m total
  • Seattle to Denver
Search Deals
Delta
  • Delta
  • 6/5
  • Nonstop
  • 2h 59m total
  • Seattle to Denver
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£12 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 April 2026
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Denver Intl.
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 5 April 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 return flight
Fastest return journey

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 9/5

13:40-17:40

Nonstop3h 00m

Denver Intl

Mon 11/5

06:05-08:09

Nonstop3h 04m

£172

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 28/4

11:40-20:00

1 stop7h 20m

Denver Intl

Wed 6/5

13:45-22:55

2 stops10h 10m

£183

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 2/6

06:50-15:05

2 stops7h 15m

Denver Intl

Mon 8/6

20:35-00:50

1 stop5h 15m

£191

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 5/5

15:44-23:59

1 stop7h 15m

Denver Intl

Wed 6/5

06:45-14:06

1 stop8h 21m

£195

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 1/5

07:20-14:40

1 stop6h 20m

Denver Intl

Mon 4/5

16:25-23:05

2 stops7h 40m

£198

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 25/4

18:00-21:49

Nonstop2h 49m

Denver Intl

Tue 28/4

13:02-21:45

1 stop9h 43m

£210

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 6/6

07:30-17:15

2 stops8h 45m

Denver Intl

Sat 5/9

07:35-16:40

1 stop10h 05m

£213

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 24/4

07:20-17:30

2 stops9h 10m

Denver Intl

Sun 26/4

08:30-10:25

Nonstop2h 55m

£217

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 16/5

06:25-14:40

2 stops7h 15m

Denver Intl

Tue 19/5

12:05-20:20

2 stops9h 15m

£221

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 21/4

11:40-20:40

2 stops8h 00m

Denver Intl

Wed 22/4

12:05-20:20

2 stops9h 15m

£221

Flights are sorted by cheapest return flights first.

Deals found on 3/4

Showing 1-10 of 23 resultsSorted by cheapest first
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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 3 April 2026.

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 66 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 £28). Flying from Seattle to Denver in June is currently the most expensive (average of £86). 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 5 April 2026.

One of the essential ways to save on airfare from Seattle to Denver is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 65% on airfare.

How much does it cost for a return flight from Seattle to Denver?

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 5 April 2026.
Read through reviews of airlines operating flights from Seattle to Denver, such as Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Frontier
5.7
Fair
3,001 reviews
Check prices

Comfort

5.4

Crew

6.6

Entertainment

4.3

Overall

5.7

Boarding

5.9

Food

4.5

Reviews

1 / 20
2.0
Mediocre

Prodipto,Mar 2026

PHL - BNA

Delay at the beginning in Philly and then huge delay just sitting on the tarmac after landing, for one hour in Nashville
Frontier
5.7
Fair
3,001 reviews
Frontier
5.7
Fair
3,001 reviews
Check prices

Comfort

5.4

Crew

6.6

Entertainment

4.3

Overall

5.7

Boarding

5.9

Food

4.5

Reviews

1 / 20
2.0
Mediocre

Prodipto,Mar 2026

PHL - BNA

Delay at the beginning in Philly and then huge delay just sitting on the tarmac after landing, for one hour in Nashville

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 22 daily flights to Denver from 1 airline. 2h 54m 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 49m. The distance between Seattle and Denver is about 1022 mi. This flight may include one or multiple stops.

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

    Flying on Frontier is currently your cheapest option to Denver, with prices starting at £41. Users have found that Frontier is 74% cheaper than the other options available to this destination.

  • 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 Condor (92%), United Airlines (90%) or STARLUX Airlines (88%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Denver?

    Looking for the cheapest flight from Seattle to Denver? While on average our users pay £95, our data indicates the cheapest price to be £78. The most popular route (Seattle/Tacoma Intl - Denver Intl), is priced around £282.

  • 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 £28). Flying from Seattle to Denver in June is currently the most expensive (average of £86). 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

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 5 April 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest£41Average£164FlexibilityNo cancel feeOn-time62%
Search Frontier 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.

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