Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Seattle to Denver from C$ 128

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 16/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
22 Jan — 29 Jan1
1 adult

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

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 17 January 2025.

Round-trip from

C$ 168

One-way from

C$ 128

Popular in

December

Cheapest in

March

Average price

C$ 256
United Airlines
  • United Airlines
  • 6/2-10/2
  • Nonstop
  • 5h 50m total
  • Seattle to Denver
Search Deals
Delta
  • Delta
  • 16/4
  • Nonstop
  • 2h 45m total
  • Seattle to Denver
Search Deals
High demand for flights, 12% potential price rise
Search Deals
Best time to find cheap flights, 4% potential price drop
Search Deals
Average for round-trip flights in January 2025
Search Deals

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 17 January 2025.

Thu 6/26:00 p.m.SEA - DEN
Nonstop2h 44mUnited Airlines
Mon 10/27:05 p.m.DEN - SEA
Nonstop3h 06mUnited Airlines
Deal found 16/1C$ 168
Wed 12/210:10 a.m.SEA - DEN
2 stops7h 15mSouthwest
Wed 19/28:40 p.m.DEN - SEA
Nonstop3h 00mSouthwest
Deal found 15/1C$ 190
Thu 27/27:45 p.m.SEA - DEN
Nonstop2h 44mAlaska Airlines
Tue 4/37:00 a.m.DEN - SEA
Nonstop3h 16mAlaska Airlines
Deal found 16/1C$ 197
Wed 26/37:55 p.m.SEA - DEN
Nonstop2h 53mDelta
Tue 1/46:10 a.m.DEN - SEA
Nonstop3h 09mDelta
Deal found 16/1C$ 211

Find flights from Seattle to Denver within your budget

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 629,999 searches. Data last updated 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 6/2

6:00 p.m.-9:44 p.m.

Nonstop2h 44m

Denver Intl

Mon 10/2

7:05 p.m.-9:11 p.m.

Nonstop3h 06m

C$ 168

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 12/2

10:10 a.m.-6:25 p.m.

2 stops7h 15m

Denver Intl

Wed 19/2

8:40 p.m.-10:40 p.m.

Nonstop3h 00m

C$ 190

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 27/2

7:45 p.m.-11:29 p.m.

Nonstop2h 44m

Denver Intl

Tue 4/3

7:00 a.m.-9:16 a.m.

Nonstop3h 16m

C$ 197

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 26/3

7:55 p.m.-11:48 p.m.

Nonstop2h 53m

Denver Intl

Tue 1/4

6:10 a.m.-8:19 a.m.

Nonstop3h 09m

C$ 211

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 16/4

9:35 a.m.-1:20 p.m.

Nonstop2h 45m

C$ 128

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 19/2

3:04 p.m.-10:28 p.m.

1 stop6h 24m

C$ 135

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 14/2

7:45 p.m.-11:29 p.m.

Nonstop2h 44m

C$ 171

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 27/2

1:25 p.m.-8:55 p.m.

2 stops6h 30m

C$ 207

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/1

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 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.

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 round-trip flight from Seattle to Denver. Price data was last updated on 10 January 2025.

The best time to book flights from Seattle to Denver is 69 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, August is the cheapest month in which you can book a flight from Seattle to Denver (average of C$ 320). Flying from Seattle to Denver in December is currently the most expensive (average of C$ 484). 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 17 January 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 40% on flights from Seattle to Denver by exploring options for tickets in the evening.

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 17 January 2025.

The most flights from SEA to DEN are scheduled on a Thursday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 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 mm 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 17 January 2025.
Peruse reviews from past customers who have flown with United Airlines, Southwest and Alaska Airlines from Seattle to Denver to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,659 reviews
Check prices

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews
Check prices

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,681 reviews
Southwest
8.1
Very good
4,659 reviews
Check prices

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,511 reviews
Southwest
8.1
Very good
4,659 reviews
Check prices

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,965 reviews
Southwest
8.1
Very good
4,659 reviews
Check prices

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 26 flights from Seattle/Tacoma Intl to Denver Intl, all of which are around 2h 47m for a nonstop flight. You can also purchase a plane ticket from 5 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 468 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    According to our current data, United Airlines (C$ 168), Southwest (C$ 190), and Alaska Airlines (C$ 197) offers the cheapest pricing from Seattle to Denver. Users have found that United Airlines is 34% cheaper than the other options available to this destination.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as C$ 128. However, be on the lookout for offers from United Airlines and Alaska Airlines, as they are both options that can get you from Seattle to Denver for a low price.

  • 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: United Airlines (94%), Japan Airlines (93%), Copa Airlines( 91%).

  • 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$ 742, our data indicates the cheapest price to be C$ 68. The most popular route (Seattle/Tacoma Intl - Denver Intl), is priced around C$ 145.

  • 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 vacation 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, August is the cheapest month in which you can book a flight from Seattle to Denver (average of C$ 320). Flying from Seattle to Denver in December is currently the most expensive (average of C$ 484). 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
Golden
Westminster
Thornton

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.

Alternative routes for Seattle to Denver

See prices for flight routes from nearby airports that may be better suited for you.
Bellingham to Denver flights

Top 5 airlines flying from Seattle to Denver

Discover the top 5 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 629,999 searches. Data last updated 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapestC$ 78AverageC$ 161FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapestC$ 114AverageC$ 247FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
SouthwestCheapestC$ 190AverageC$ 249FlexibilityNo cancel feeOn-time63%
Search Southwest flights
Alaska AirlinesCheapestC$ 192AverageC$ 305FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapestC$ 198AverageC$ 341FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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.

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.