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Cheap flights from Seattle to Denver from £61

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 21/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
2 Apr — 9 Apr1
1 adult

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Denver Intl are usually found in September or October, booked 86 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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 28 March 2025.

Round-trip from

£91

One-way from

£61

Popular in

December

Cheapest in

September

Average price

£160
Frontier
  • Frontier
  • 25/4-28/4
  • Nonstop
  • 6h 03m total
  • Seattle to Denver
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United Airlines
  • United Airlines
  • 21/5
  • Nonstop
  • 2h 43m total
  • Seattle to Denver
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Highest demand for flights based on searches. 6% potential increase in price (£8 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£4 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Find flight deals from Seattle to Denver

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 28 March 2025.

Fri 25/412:30SEA - DEN
Nonstop2h 56mFrontier
Mon 28/422:37DEN - SEA
Nonstop3h 07mFrontier
Deal found 28/3£91
Wed 7/507:10SEA - DEN
Nonstop2h 50mDelta
Sat 10/518:53DEN - SEA
Nonstop2h 57mDelta
Deal found 27/3£121
Sat 10/507:00SEA - DEN
1 stop6h 59mUnited Airlines
Tue 13/519:00DEN - SEA
Nonstop3h 02mUnited Airlines
Deal found 26/3£126
Sat 3/513:58SEA - DEN
Nonstop2h 40mAlaska Airlines
Wed 14/518:37DEN - SEA
1 stop5h 54mAlaska Airlines
Deal found 28/3£129
Sat 3/512:00SEA - DEN
1 stop6h 55mSouthwest
Wed 7/516:05DEN - SEA
1 stop8h 45mSouthwest
Deal found 27/3£136
Sun 25/511:20SEA - DEN
1 stop5h 49mHawaiian Airlines
Fri 30/506:00DEN - SEA
Nonstop2h 59mHawaiian Airlines
Deal found 27/3£183
Fri 4/413:56SEA - DEN
Nonstop2h 50mMultiple Airlines
Tue 15/417:38DEN - SEA
Nonstop3h 03mMultiple Airlines
Deal found 26/3£196

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 28 March 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

Fri 25/4

12:30-16:26

Nonstop2h 56m

Denver Intl

Mon 28/4

22:37-00:44

Nonstop3h 07m

£91

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 7/5

07:10-11:00

Nonstop2h 50m

Denver Intl

Sat 10/5

18:53-20:50

Nonstop2h 57m

£121

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 10/5

07:00-14:59

1 stop6h 59m

Denver Intl

Tue 13/5

19:00-21:02

Nonstop3h 02m

£126

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 3/5

13:58-17:38

Nonstop2h 40m

Denver Intl

Wed 14/5

18:37-23:31

1 stop5h 54m

£129

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 3/5

12:00-19:55

1 stop6h 55m

Denver Intl

Wed 7/5

16:05-23:50

1 stop8h 45m

£136

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 25/5

11:20-18:09

1 stop5h 49m

Denver Intl

Fri 30/5

06:00-07:59

Nonstop2h 59m

£183

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 21/5

05:15-08:58

Nonstop2h 43m

£61

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 26/4

12:35-20:55

1 stop7h 20m

£68

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 10/6

11:20-18:09

1 stop5h 49m

£84

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 22/9

19:40-23:21

Nonstop2h 41m

£84

Flights are sorted by cheapest return flights first.

Deals found on 28/3

Showing 1-10 of 11 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 21 March 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 86 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 £667). Flying from Seattle to Denver in July is currently the most expensive (average of £1,030). 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 28 March 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 afternoon could potentially save you up to 61% on airfare.

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 28 March 2025.

The most flights from SEA to DEN are scheduled on a Thursday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 13.0 - 58.0 inches per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Denver when rainfall is around 13.0 mm.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

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 28 March 2025.
Read through reviews of airlines operating flights from Seattle to Denver, such as Southwest, Alaska Airlines and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very Good
4,273 reviews
Check prices

Crew

8.6

Entertainment

7.6

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very Good
4,273 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Crew

8.6

Entertainment

7.6

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very Good
9,798 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Crew

8.6

Entertainment

7.6

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very Good
7,896 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Crew

8.6

Entertainment

7.6

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,335 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Crew

8.6

Entertainment

7.6

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Crew

8.6

Entertainment

7.6

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 40m 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 15 times in the past calendar month.

  • What are the cheapest airlines flying from Seattle to Denver round-trip?

    Flying on Frontier is currently your cheapest option to Denver, with prices starting at £91. Additional return tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at £121 and £126, respectively. Users have found that Frontier is 38% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Denver one-way?

    The cheapet airlines for a one-way flight from Seattle to Denver are United Airlines (£61), Southwest (£68), and Alaska Airlines (£84).

  • 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 China Airlines (100%), Aeromexico (100%) or LATAM Airlines (100%) 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 £667). Flying from Seattle to Denver in July is currently the most expensive (average of £1,030). 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 Seattle?

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

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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 28 March 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£206Average£237FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Fly with Cheapflights

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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.

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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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