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Cheap flights from Seattle to Denver from C$ 67

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 1/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
1 Apr — 8 Apr1
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 September, booked 69 days in advance, depart on a Thursday or Friday and return on a Thursday

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 2 March 2026.

Tue 31/37:46 p.m.
SEA
-
DEN
Nonstop2h 46m
Delta
Tue 5/51:20 p.m.
DEN
-
SEA
Nonstop2h 55m
Delta
Deal found 27/2C$ 132
Wed 22/47:05 p.m.
SEA
-
DEN
Nonstop2h 51m
United Airlines
Sat 25/45:57 p.m.
DEN
-
SEA
1 stop6h 30m
United Airlines
Deal found 27/2C$ 140
Fri 1/511:05 a.m.
SEA
-
DEN
1 stop6h 55m
Southwest
Mon 4/59:35 p.m.
DEN
-
SEA
Nonstop2h 55m
Southwest
Deal found 27/2C$ 146
Wed 22/47:50 a.m.
SEA
-
DEN
2 stops8h 20m
Southwest
Sat 25/44:15 p.m.
DEN
-
SEA
Nonstop3h 00m
Southwest
Deal found 1/3C$ 153
Tue 21/44:36 p.m.
SEA
-
DEN
1 stop4h 53m
Delta
Tue 28/46:55 a.m.
DEN
-
SEA
Nonstop3h 06m
Delta
Deal found 27/2C$ 160
Mon 30/35:00 a.m.
SEA
-
DEN
Nonstop2h 44m
United Airlines
Fri 3/47:45 a.m.
DEN
-
SEA
Nonstop3h 01m
United Airlines
Deal found 1/3C$ 169
Sat 14/311:10 a.m.
SEA
-
DEN
Nonstop2h 35m
Southwest
Wed 25/36:55 p.m.
DEN
-
SEA
1 stop6h 45m
Southwest
Deal found 26/2C$ 173
Sat 18/46:25 a.m.
SEA
-
DEN
2 stops12h 35m
Southwest
Wed 22/45:15 p.m.
DEN
-
SEA
1 stop7h 20m
Southwest
Deal found 28/2C$ 175
Sat 14/33:40 p.m.
SEA
-
DEN
Nonstop2h 45m
United Airlines
Fri 20/38:54 p.m.
DEN
-
SEA
Nonstop3h 05m
United Airlines
Deal found 27/2C$ 180
Sat 18/46:25 a.m.
SEA
-
DEN
2 stops12h 35m
Southwest
Tue 21/41:45 p.m.
DEN
-
SEA
2 stops10h 10m
Southwest
Deal found 28/2C$ 181
Sat 18/43:50 p.m.
SEA
-
DEN
1 stop6h 54m
Alaska Airlines
Sun 26/46:00 a.m.
DEN
-
SEA
Nonstop3h 03m
Alaska Airlines
Deal found 27/2C$ 187

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 2 March 2026.

Round-trip from

C$ 132

One-way from

C$ 67

Popular in

June

Cheapest in

January

Average price

C$ 296

Good round-trip deal

C$ 112 or less

Good one-way deal

C$ 45 or less
Delta
  • Delta
  • 31/3-5/5
  • Nonstop
  • 5h 41m total
  • Seattle to Denver
Search Deals
United Airlines
  • United Airlines
  • 7/4
  • Nonstop
  • 2h 44m total
  • Seattle to Denver
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Denver Intl.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Denver Intl.
Search Deals

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 2 March 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

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 20/4

8:00 p.m.-11:50 p.m.

Nonstop2h 50m

Denver Intl

Tue 28/4

6:27 p.m.-11:59 p.m.

1 stop6h 32m

C$ 160

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 15/4

7:50 a.m.-5:10 p.m.

2 stops8h 20m

Denver Intl

Wed 22/4

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

1 stop7h 00m

C$ 166

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 11/4

7:46 p.m.-11:32 p.m.

Nonstop2h 46m

Denver Intl

Thu 16/4

6:27 p.m.-11:59 p.m.

1 stop6h 32m

C$ 200

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 9/5

6:40 a.m.-1:55 p.m.

1 stop6h 15m

Denver Intl

Sat 9/5

4:35 p.m.-10:30 p.m.

1 stop6h 55m

C$ 241

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 21/5

7:50 a.m.-11:49 a.m.

Nonstop2h 59m

Denver Intl

Thu 21/5

6:35 p.m.-8:37 p.m.

Nonstop3h 02m

C$ 241

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 3/4

5:30 a.m.-11:33 a.m.

1 stop5h 03m

Denver Intl

Sat 18/4

6:55 a.m.-9:01 a.m.

Nonstop3h 06m

C$ 241

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 18/4

12:17 p.m.-11:44 p.m.

2 stops10h 27m

Denver Intl

Sun 26/4

6:00 a.m.-8:03 a.m.

Nonstop3h 03m

C$ 245

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 1/4

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

1 stop8h 10m

Denver Intl

Sun 5/4

9:10 p.m.-11:05 p.m.

Nonstop2h 55m

C$ 255

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 17/3

6:00 a.m.-9:40 a.m.

Nonstop2h 40m

Denver Intl

Fri 20/3

8:50 p.m.-10:50 p.m.

Nonstop3h 00m

C$ 255

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 2/4

6:30 a.m.-2:25 p.m.

1 stop6h 55m

Denver Intl

Wed 8/4

3:35 p.m.-10:55 p.m.

1 stop8h 20m

C$ 296

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/2

Showing 1-10 of 21 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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Denver. Price data was last updated on 27 February 2026.

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, January is the cheapest month in which you can book a flight from Seattle to Denver (average of C$ 72). Flying from Seattle to Denver in July is currently the most expensive (average of C$ 150). 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 2 March 2026.

Unlike in the morning, when flights are generally more expensive, you can save up to 28% 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 21 February 2026.

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

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 2 March 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.
Alaska Airlines
8.0
Very good
11,974 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

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.
Alaska Airlines
8.0
Very good
11,974 reviews
Alaska Airlines
8.0
Very good
11,974 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

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.
Southwest
8.0
Very good
4,307 reviews
Alaska Airlines
8.0
Very good
11,974 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

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.
Delta
7.9
Good
8,237 reviews
Alaska Airlines
8.0
Very good
11,974 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

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.
Hawaiian Airlines
7.8
Good
2,837 reviews
Alaska Airlines
8.0
Very good
11,974 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

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.
Frontier
5.7
Fair
3,041 reviews
Alaska Airlines
8.0
Very good
11,974 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

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 24 flights from Seattle/Tacoma Intl to Denver Intl, all of which are around 2h 45m 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 178 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Seattle to Denver?

    There are many flights that can get you from Seattle to Denver in 2h 50m. Fly via Delta 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$ 80), and Southwest (C$ 114) offers the cheapest pricing from Seattle to Denver. Users have found that Frontier is 78% 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: Aeromexico (93%), Southwest (92%), SkyWest Airlines( 92%).

  • 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$ 203, our data indicates the cheapest price to be C$ 45. The most popular route (Seattle/Tacoma Intl - Denver Intl), is priced around C$ 228.

  • 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$ 72). Flying from Seattle to Denver in July is currently the most expensive (average of C$ 150). 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.
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 2 March 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapestC$ 61AverageC$ 185FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapestC$ 80AverageC$ 240FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
SouthwestCheapestC$ 114AverageC$ 241FlexibilityNo cancel feeOn-time63%
Search Southwest flights
Hawaiian AirlinesCheapestC$ 197AverageC$ 289FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
Alaska AirlinesCheapestC$ 214AverageC$ 364FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

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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.

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