How many flights depart from Denver to Seattle on average per day?

23 flights are operational daily from Denver to Seattle as of October 2025. The most popular departure time for this route is 12:00PM, with 45% of flights per day taking off in the afternoon.

How often are flights from Denver to Seattle delayed?

Historically, on average around 17% of flights between Denver and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 149 minutes.

What is the cheapest airline that flies from Denver Intl to Seattle/Tacoma Intl?

Frontier, Alaska Airlines, and Delta are the most popular carriers operating from Denver Intl to Seattle/Tacoma Intl

What airlines fly to Seattle?

Frontier, Delta and Alaska Airlines are the top three most popular airlines that fly to Seattle from Denver according to our data. Frontier is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

How many flights depart from Denver to Seattle on average per week?

165 flights are operational weekly from Denver to Seattle as of October 2025. The most popular departure day for this route is Wed, with 25% of flights per week taking off on this day.

What is the most punctual flight time for Denver to Seattle flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Which airline has the best punctuality record on Denver to Seattle flights?

According to our data, Atlas Air have had the least number of delays on this route over the last 12 months; with no flights being classified as delayed.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

When did momondo last update prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport were last updated today.

How many operators does momondo search for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport?

As of October 2025, there are 6 operators available to choose from for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport.

How old do you have to be to fly from Denver Intl Airport to Seattle/Tacoma Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$53 Cheap Flights from Denver to Seattle in 2025/26

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12:14 pm - 6:32 pmDEN-SEA

7h 18m1 stop

1:01 pm - 4:47 pmSEA-DEN

2h 46mnonstop

$86Frontier

Find Deal

Sat, Nov 15 - Sat, Nov 22

10:29 pm - 6:32 pmDEN-SEA

21h 03m1 stop

12:58 pm - 4:57 pmSEA-DEN

2h 59mnonstop

$87Frontier

Find Deal

Wed, Nov 12 - Sat, Nov 15

9:44 am - 11:56 amDEN-SEA

3h 12mnonstop

7:55 am - 11:44 amSEA-DEN

2h 49mnonstop

$88Multiple Airlines

Find Deal

Mon, Nov 24 - Wed, Dec 3

6:00 am - 8:10 amDEN-SEA

3h 10mnonstop

11:02 am - 2:46 pmSEA-DEN

2h 44mnonstop

$89Alaska Airlines

Find Deal

Thu, Dec 4 - Tue, Dec 9

6:00 am - 6:32 pmDEN-SEA

13h 32m1 stop

1:37 pm - 5:30 pmSEA-DEN

2h 53mnonstop

$90Frontier

Find Deal

Sat, Nov 15 - Tue, Nov 18

10:00 am - 12:13 pmDEN-SEA

3h 13mnonstop

2:06 pm - 5:50 pmSEA-DEN

2h 44mnonstop

$94Multiple Airlines

Find Deal

Sat, Nov 15 - Tue, Nov 18

6:05 am - 8:15 amDEN-SEA

3h 10mnonstop

3:15 pm - 6:54 pmSEA-DEN

2h 39mnonstop

$97Delta

Find Deal

Sat, Dec 6 - Sat, Dec 6

11:41 am - 3:47 pmDEN-SEA

5h 06m1 stop

11:02 am - 2:46 pmSEA-DEN

2h 44mnonstop

$109Alaska Airlines

Find Deal

Fri, Dec 5 - Wed, Dec 10

8:55 pm - 10:55 pmDEN-SEA

3h 00mnonstop

6:15 am - 2:10 pmSEA-DEN

6h 55m2 stops

$128Southwest

Find Deal

Fri, Dec 5 - Thu, Dec 11

6:15 am - 8:24 amDEN-SEA

3h 09mnonstop

7:40 pm - 11:22 pmSEA-DEN

2h 42mnonstop

$137Delta

Find Deal

Sat, Feb 28 - Sun, Mar 1

Frontier flights from Denver to Seattle

Our best Frontier deals on Denver to Seattle flight tickets

Frontier

Nov 15

DEN12:14 pmDenver Intl

7h 18m

1 stop

SEA6:32 pmSeattle/Tacoma Intl

Nov 22

SEA1:01 pmSeattle/Tacoma Intl

2h 46m

DEN4:47 pmDenver Intl

$86

Find similar

Frontier

Nov 12

DEN10:29 pmDenver Intl

21h 03m

1 stop

SEA6:32 pmSeattle/Tacoma Intl

Nov 15

SEA12:58 pmSeattle/Tacoma Intl

2h 59m

DEN4:57 pmDenver Intl

$87

Find similar

Frontier

Nov 15

DEN6:00 amDenver Intl

13h 32m

1 stop

SEA6:32 pmSeattle/Tacoma Intl

Nov 18

SEA1:37 pmSeattle/Tacoma Intl

2h 53m

DEN5:30 pmDenver Intl

$90

Find similar

Alaska Airlines flights from Denver to Seattle

Our best Alaska Airlines deals on Denver to Seattle flight tickets

Alaska Airlines

Dec 4

DEN6:00 amDenver Intl

3h 10m

SEA8:10 amSeattle/Tacoma Intl

Dec 9

SEA11:02 amSeattle/Tacoma Intl

2h 44m

DEN2:46 pmDenver Intl

$89

Find similar

Alaska Airlines

Dec 5

DEN11:41 amDenver Intl

5h 06m

1 stop

SEA3:47 pmSeattle/Tacoma Intl

Dec 10

SEA11:02 amSeattle/Tacoma Intl

2h 44m

DEN2:46 pmDenver Intl

$109

Find similar

Alaska Airlines

Dec 3

DEN6:45 amDenver Intl

3h 13m

SEA8:58 amSeattle/Tacoma Intl

Dec 17

SEA7:55 amSeattle/Tacoma Intl

2h 49m

DEN11:44 amDenver Intl

$113

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 11/15

12:14 pm-6:32 pm

1 stop7h 18m

Seattle/Tacoma Intl

Sat 11/22

1:01 pm-4:47 pm

Nonstop2h 46m

$86

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 11/12

10:29 pm-6:32 pm

1 stop21h 03m

Seattle/Tacoma Intl

Sat 11/15

12:58 pm-4:57 pm

Nonstop2h 59m

$87

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Mon 11/24

9:44 am-11:56 am

Nonstop3h 12m

Seattle/Tacoma Intl

Wed 12/3

7:55 am-11:44 am

Nonstop2h 49m

$88

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Thu 12/4

6:00 am-8:10 am

Nonstop3h 10m

Seattle/Tacoma Intl

Tue 12/9

11:02 am-2:46 pm

Nonstop2h 44m

$89

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 11/15

6:00 am-6:32 pm

1 stop13h 32m

Seattle/Tacoma Intl

Tue 11/18

1:37 pm-5:30 pm

Nonstop2h 53m

$90

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 11/15

10:00 am-12:13 pm

Nonstop3h 13m

Seattle/Tacoma Intl

Tue 11/18

2:06 pm-5:50 pm

Nonstop2h 44m

$94

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 12/6

6:05 am-8:15 am

Nonstop3h 10m

Seattle/Tacoma Intl

Sat 12/6

3:15 pm-6:54 pm

Nonstop2h 39m

$97

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 12/5

11:41 am-3:47 pm

1 stop5h 06m

Seattle/Tacoma Intl

Wed 12/10

11:02 am-2:46 pm

Nonstop2h 44m

$109

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 12/5

8:55 pm-10:55 pm

Nonstop3h 00m

Seattle/Tacoma Intl

Thu 12/11

6:15 am-2:10 pm

2 stops6h 55m

$128

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 2/28

6:15 am-8:24 am

Nonstop3h 09m

Seattle/Tacoma Intl

Sun 3/1

7:40 pm-11:22 pm

Nonstop2h 42m

$137

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Denver to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Delays

Other information

What is the cheapest month to fly to Seattle?

In general, January is the cheapest month to fly from Denver to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $183. If you don’t want to visit Seattle in January, then you should wait until February to fly from Denver, when ticket prices are also cheap, with an average price of $187.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Denver is on a Friday. momondo users have found tickets for Friday departures for as low as $293. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Denver because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $457.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Denver in the evening is the least expensive time of day to depart. momondo users have found prices as low as $279 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $397. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Denver Intl to Seattle/Tacoma Intl flight route?

Fly from Denver Intl to Seattle/Tacoma Intl for the best Denver Intl - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $214 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Denver for as low as $180 on momondo.

What cabin class options are available on Denver Intl to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Denver Intl to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Denver to Seattle flights?

No. A direct flight is the cheapest option for a flight between Denver to Seattle.

How have Denver to Seattle flight prices changed over time?

As of October 2025, prices for Denver to Seattle flights are approximately 74% more expensive when compared to flights at the same time last year.

When to book flights from Denver to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Denver to Seattle (DEN to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to Seattle

Best Price Found	$113
Fastest flight time	3h 00m
Direct flights	Every day
Airports in Seattle	1 airport

The best one-way flight to Seattle from Denver in the past 72 hours is $113. The best round-trip flight deal from Denver to Seattle found on momondo in the last 72 hours is $189.

The fastest flight from Denver to Seattle takes 3h 00m

Direct flights go from Denver to Seattle every day.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

Search flight deals

How far is Denver Intl to Seattle/Tacoma Intl by plane?
A flight from Denver Intl to Seattle/Tacoma Intl will travel around 1019.6 mi. 3h 00m is a normal flight duration for this route.
When did momondo last update prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport were last updated today.
How many operators does momondo search for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport?
As of October 2025, there are 6 operators available to choose from for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Denver Intl Airport to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Denver to Seattle?
momondo data reveals that the most frequently booked plane model on the route from Denver to Seattle is Boeing 737 MAX 9, representing 14.67% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 12.70%, Boeing 737-900 Passenger/BBJ3 (winglets) at 11.87%, and Boeing 737 MAX 8 at 10.77%.
What is the most popular airline from Denver to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Denver to Seattle is Frontier (35% of total bookings). The next most popular airlines are Delta (22%), Alaska Airlines (21%), and United Airlines (13%).

Best airlines flying from Denver to Seattle

Compare and see reviews for airlines that fly from Denver to Seattle with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $66	Free Cancellation	Rating 5.8 3,124 reviews	Search Frontier flights
Delta	PriceFrom $109	Free Cancellation	Rating 7.9 7,992 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $111	Free Cancellation	Rating 7.8 2,796 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $131	Free Cancellation	Rating 8.0 4,241 reviews	Search Southwest flights
United Airlines	PriceFrom $143	Free Cancellation	Rating 7.4 8,999 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $160	Free Cancellation	Rating 8.0 11,211 reviews	Search Alaska Airlines flights

Southwest Flights From Denver to Seattle
Southwest operates around 20 flights from Denver to Seattle every week. The average price of these flights found in the last 72 hours has been $234, but momondo users have found Southwest deals from Denver to Seattle from as low as $131 round-trip. Southwest has been scored 8.0/10 in 4,241 reviews.
Alaska Airlines Flights From Denver to Seattle
The best Alaska Airlines deal for Denver to Seattle flight tickets found on momondo in the last 72 hours was $160, round-trip. It should be noted that an average Alaska Airlines flight deal for this route in this time was higher, at $282 round-trip. Alaska Airlines operates 3 flights out of Denver into Seattle in an average week, so prices vary by time and availability. 11,206 Alaska Airlines reviews by users on momondo have scored the airline at 8.0/10.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Puyallup

Marysville

Redmond

Tukwila

Federal Way

Lakewood

Cle Elum

Fife

Centralia

Kirkland

Shoreline

Westport

Why use momondo?

Why should I use momondo to find a flight deal from Denver to Seattle?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Denver to Seattle for you.

Can I find flights from Denver to Seattle with flexible booking policies on momondo?

Flights from Denver to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Denver to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Denver. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Denver to Seattle right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seattle from Denver. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from Denver to Seattle from $55

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Seattle departing on 12/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Frontier flights from Denver to Seattle

Our best Frontier deals on Denver to Seattle flight tickets

Alaska Airlines flights from Denver to Seattle

Our best Alaska Airlines deals on Denver to Seattle flight tickets

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Use the filters below to find and compare flights from Denver to Seattle that are best for you.

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How to get the cheapest flight ticket from Denver to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

What is the cheapest day to depart on your flight to Seattle?

What is the cheapest time of day to depart on your flight to Seattle?

What is the cheapest Denver Intl to Seattle/Tacoma Intl flight route?

Fly from Denver Intl to Seattle/Tacoma Intl for the best Denver Intl - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

What cabin class options are available on Denver Intl to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Denver Intl to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Denver to Seattle flights?

No. A direct flight is the cheapest option for a flight between Denver to Seattle.

How have Denver to Seattle flight prices changed over time?

As of October 2025, prices for Denver to Seattle flights are approximately 74% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Denver Intl to Seattle/Tacoma Intl?

Frontier, Alaska Airlines, and Delta are the most popular carriers operating from Denver Intl to Seattle/Tacoma Intl

What airlines fly to Seattle?

How often are flights from Denver to Seattle delayed?

Historically, on average around 17% of flights between Denver and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 149 minutes.

What is the most punctual flight time for Denver to Seattle flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Denver to Seattle flights?

According to our data, Atlas Air have had the least number of delays on this route over the last 12 months; with no flights being classified as delayed.

How many flights depart from Denver to Seattle on average per day?

23 flights are operational daily from Denver to Seattle as of October 2025. The most popular departure time for this route is 12:00PM, with 45% of flights per day taking off in the afternoon.

How many flights depart from Denver to Seattle on average per week?

165 flights are operational weekly from Denver to Seattle as of October 2025. The most popular departure day for this route is Wed, with 25% of flights per week taking off on this day.

When to book flights from Denver to Seattle

Cheap Denver to Seattle (DEN to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to Seattle

Best Price Found

Fastest flight time

Direct flights

Airports in Seattle

How far is Denver Intl to Seattle/Tacoma Intl by plane?

When did momondo last update prices for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport?

How many operators does momondo search for flights from Denver Intl Airport to Seattle/Tacoma Intl Airport?

How old do you have to be to fly from Denver Intl Airport to Seattle/Tacoma Intl Airport?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

What is the most popular plane model from Denver to Seattle?

What is the most popular airline from Denver to Seattle?

Best airlines flying from Denver to Seattle

Compare and see reviews for airlines that fly from Denver to Seattle with momondo

Southwest Flights From Denver to Seattle

Alaska Airlines Flights From Denver to Seattle

Traveling to a place near Seattle?

Why use momondo?

Why should I use momondo to find a flight deal from Denver to Seattle?

Can I find flights from Denver to Seattle with flexible booking policies on momondo?

How can momondo help me find flights from Denver to Seattle?

I’m not ready to book a flight from Denver to Seattle right now. Can momondo alert me if prices change?

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States