Cheap flights from Seattle to Denver from C$ 114

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 17/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
3 Jun — 10 Jun1
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 61 days in advance, depart on a Thursday or Saturday and return on a Monday

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 4 May 2026.

Wed 3/67:50 p.m.
SEA
-
DEN
Nonstop3h 04m
Frontier
Wed 10/67:45 a.m.
DEN
-
SEA
Nonstop3h 03m
Frontier
Deal found 3/5C$ 174
Wed 3/67:50 p.m.
SEA
-
DEN
Nonstop3h 04m
Frontier
Sat 6/68:41 a.m.
DEN
-
SEA
1 stop11h 24m
Frontier
Deal found 30/4C$ 197
Tue 9/63:33 p.m.
SEA
-
DEN
Nonstop2h 48m
Frontier
Fri 12/612:14 p.m.
DEN
-
SEA
Nonstop3h 04m
Frontier
Deal found 30/4C$ 200
Fri 5/67:50 p.m.
SEA
-
DEN
Nonstop3h 04m
Frontier
Mon 8/68:41 a.m.
DEN
-
SEA
1 stop11h 24m
Frontier
Deal found 2/5C$ 211
Wed 12/87:41 p.m.
SEA
-
DEN
Nonstop2h 52m
Frontier
Sat 15/88:44 a.m.
DEN
-
SEA
1 stop11h 08m
Frontier
Deal found 2/5C$ 262

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 4 May 2026.

Round-trip from

C$ 174

One-way from

C$ 114

Popular in

June

Cheapest in

January

Average price

C$ 322

Good round-trip deal

C$ 282 or less

Good one-way deal

C$ 170 or less
Frontier
  • Frontier
  • 3/6-10/6
  • Nonstop
  • 6h 07m total
  • Seattle to Denver
Frontier
  • Frontier
  • 17/6
  • Nonstop
  • 2h 48m total
  • Seattle to Denver
Highest demand for flights based on searches. 10% potential increase in price (C$ 45 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease (C$ 9 potential savings vs. average RT price).
Average for round-trip flights in May 2026
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Denver Intl.
Price to beat on a one-way flight from Seattle/Tacoma Intl to Denver Intl.

Cheapflights Fare Finder

 
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 4 May 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 round-trip

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 23/5

3:30 p.m.-11:43 p.m.

1 stop7h 13m

Denver Intl

Tue 26/5

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

C$ 308

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 28/5

7:20 a.m.-5:30 p.m.

2 stops9h 10m

Denver Intl

Sat 6/6

7:35 p.m.-1:10 a.m.

1 stop6h 35m

C$ 370

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 3/6

8:25 a.m.-4:30 p.m.

1 stop7h 05m

Denver Intl

Wed 10/6

5:30 p.m.-11:30 p.m.

2 stops7h 00m

C$ 382

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 23/5

6:25 a.m.-4:40 p.m.

1 stop9h 15m

Denver Intl

Tue 26/5

1:45 p.m.-10:55 p.m.

2 stops10h 10m

C$ 391

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 29/5

3:33 p.m.-11:43 p.m.

1 stop7h 10m

Denver Intl

Sun 31/5

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

C$ 401

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 12/8

8:30 a.m.-5:05 p.m.

1 stop7h 35m

Denver Intl

Sat 15/8

12:00 p.m.-7:30 p.m.

2 stops8h 30m

C$ 435

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 15/7

7:30 a.m.-3:50 p.m.

2 stops7h 20m

Denver Intl

Wed 22/7

4:20 p.m.-11:30 p.m.

2 stops8h 10m

C$ 442

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 2/8

6:10 a.m.-3:10 p.m.

2 stops8h 00m

Denver Intl

Wed 5/8

12:50 p.m.-5:30 p.m.

1 stop5h 40m

C$ 477
Quickest round-trip

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 8/6

7:56 p.m.-11:46 p.m.

Nonstop2h 50m

Denver Intl

Fri 12/6

7:00 p.m.-11:59 p.m.

1 stop5h 59m

C$ 478

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 9/7

7:15 a.m.-2:53 p.m.

1 stop6h 38m

Denver Intl

Mon 13/7

7:09 p.m.-11:59 p.m.

1 stop5h 50m

C$ 482

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/5

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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.

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?

The best time to book flights from Seattle to Denver is 60 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, January is the cheapest month in which you can book a flight from Seattle to Denver (average of C$ 216). Flying from Seattle to Denver in June is currently the most expensive (average of C$ 356). 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 4 May 2026.

Unlike in the morning, when flights are generally more expensive, you can save up to 26% on flights from Seattle to Denver by exploring options for tickets at noon.

What is the cheapest day to fly from Seattle to Denver?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Denver. Price data was last updated on 25 April 2026.

Travelers seeking maximum savings on their Seattle to Denver flight should consider departing on Monday evenings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip 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 4 May 2026.
Read through reviews of airlines operating flights from Seattle to Denver, such as Alaska Airlines,Southwest, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Overall

7.9

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Overall

7.9

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Overall

7.9

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Overall

7.9

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Overall

7.9

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Overall

7.9

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 23 flights from Seattle/Tacoma Intl to Denver Intl, all of which are around 2h 51m 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?

  • How long is the flight from Seattle to Denver?

    There are many flights that can get you from Seattle to Denver in 2h 57m. Fly via United Airlines, Alaska Airlines, or Southwest to get the fastest option. There are 1645 km between Seattle and Denver. This flight may include one or multiple stops.

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

    According to our current data, Frontier (C$ 61), Delta (C$ 79), and Southwest (C$ 113) offers the cheapest pricing from Seattle to Denver. Users have found that Frontier is 79% cheaper than the other options available to this destination.

  • 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: STARLUX Airlines (94%), Icelandair (94%), United Airlines( 90%).

  • 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$ 261, our data indicates the cheapest price to be C$ 137. The most popular route (Seattle/Tacoma Intl - Denver Intl), is priced around C$ 279.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Denver (average of C$ 216). Flying from Seattle to Denver in June is currently the most expensive (average of C$ 356). 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
Golden
Thornton
Black Hawk

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Alternative routes for Seattle to Denver

See prices for flight routes from nearby airports that may be better suited for you.

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 4 May 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapestC$ 61AverageC$ 200FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapestC$ 79AverageC$ 235FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
SouthwestCheapestC$ 113AverageC$ 240FlexibilityNo cancel feeOn-time63%
Search Southwest flights
Alaska AirlinesCheapestC$ 186AverageC$ 384FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Hawaiian AirlinesCheapestC$ 196AverageC$ 289FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Denver?

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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.

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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.

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