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Cheap flights from Seattle to Denver from £54

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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
26 Feb — 5 Mar1
1 adult

The best prices from Seattle/Tacoma Intl to Denver Intl are usually found in March or September, booked 69 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

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 21 February 2025.

Round-trip from

£93

One-way from

£54

Popular in

December

Cheapest in

March

Average price

£164

Good round-trip deal

£219 or less
Delta
  • Delta
  • 25/3-30/3
  • Nonstop
  • 6h 03m total
  • Seattle to Denver
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Delta
  • Delta
  • 6/4
  • Nonstop
  • 2h 45m total
  • Seattle to Denver
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£14 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£5 potential savings vs. average return price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Denver Intl.
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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 21 February 2025.

Tue 25/309:35SEA - DEN
Nonstop2h 54mDelta
Sun 30/306:10DEN - SEA
Nonstop3h 09mDelta
Deal found 21/2£93
Thu 20/305:14SEA - DEN
Nonstop2h 42mUnited Airlines
Thu 27/319:00DEN - SEA
Nonstop3h 01mUnited Airlines
Deal found 20/2£109
Wed 23/406:15SEA - DEN
2 stops8h 20mSouthwest
Tue 29/408:35DEN - SEA
Nonstop2h 55mSouthwest
Deal found 20/2£120
Wed 30/405:30SEA - DEN
1 stop4h 51mAlaska Airlines
Wed 30/419:55DEN - SEA
Nonstop3h 00mAlaska Airlines
Deal found 20/2£164
Fri 28/207:55SEA - DEN
Nonstop2h 47mHawaiian Airlines
Fri 28/217:08DEN - SEA
Nonstop3h 02mHawaiian Airlines
Deal found 20/2£262
Fri 11/400:59SEA - DEN
1 stop10h 03mAmerican Airlines
Tue 29/413:18DEN - SEA
1 stop6h 14mAmerican Airlines
Deal found 20/2£305

Find flights from Seattle to Denver within your budget

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 21 February 2025.

Fly from

Seattle

Fly to

Denver

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 25/3

09:35-13:29

Nonstop2h 54m

Denver Intl

Sun 30/3

06:10-08:19

Nonstop3h 09m

£93

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 20/3

05:14-08:56

Nonstop2h 42m

Denver Intl

Thu 27/3

19:00-21:01

Nonstop3h 01m

£109

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 23/4

06:15-15:35

2 stops8h 20m

Denver Intl

Tue 29/4

08:35-10:30

Nonstop2h 55m

£120

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 2/5

05:30-10:51

1 stop4h 21m

Denver Intl

Sat 3/5

08:20-12:29

1 stop5h 09m

£179

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 11/4

00:59-12:02

1 stop10h 03m

Denver Intl

Tue 29/4

13:18-18:32

1 stop6h 14m

£305

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 6/4

19:55-23:40

Nonstop2h 45m

£54

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 17/3

08:05-13:54

1 stop4h 49m

£62

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 2/4

11:15-20:50

2 stops8h 35m

£67

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 22/3

05:15-08:57

Nonstop2h 42m

£71

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 5/4

00:59-23:53

1 stop21h 54m

£290

Flights are sorted by cheapest return flights first.

Deals found on 20/2

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.

Travel insights for flights from Seattle to Denver

Get recent, data-driven insights about flights from Seattle to Denver including ideal travel times, pricing trends, and more.

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 February 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 69 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 21 February 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 55% 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 21 February 2025.

The most flights from SEA to DEN are scheduled on a Thursday (44 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 21 February 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
4,406 reviews
Check prices

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very Good
4,406 reviews
Southwest
8.1
Very Good
4,406 reviews
Check prices

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very Good
9,696 reviews
Southwest
8.1
Very Good
4,406 reviews
Check prices

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very Good
8,217 reviews
Southwest
8.1
Very Good
4,406 reviews
Check prices

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,761 reviews
Southwest
8.1
Very Good
4,406 reviews
Check prices

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very Good
4,406 reviews
Check prices

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 29 daily flights to Denver from 1 airline. 2h 38m 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 14 times in the past calendar month.

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

    Flying on Delta is currently your cheapest option to Denver, with prices starting at £93. Additional return tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at £109 and £120, respectively. Users have found that Delta is 36% 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 Delta (£54), Alaska Airlines (£62), and Southwest (£67).

  • 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 Copa Airlines (93%), ANA (93%) or Condor (92%) 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 £283, our data indicates the cheapest price to be £163. The most popular route (Seattle/Tacoma Intl - Denver Intl), is priced around £103.

  • 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

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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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£211Average£243FlexibilityNo cancel feeOn-timeN/A
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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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