What is the cheapest airline that flies from Colorado to Washington?

Frontier, Alaska Airlines, and United Airlines are the most popular carriers operating from Colorado to Washington

How many flights depart from Colorado to State of Washington on average per week?

183 flights are operational weekly from Colorado to State of Washington as of December 2025. The most popular departure day for this route is Tue, with 33% of flights per week taking off on this day.

How long is the flight from Colorado to State of Washington?

If you’re flying from a popular airport in Colorado, such as Denver or Vail, and flying into State of Washington, then you can expect flight times to average 2h 59m and 3h 11m, respectively.

What airlines fly to State of Washington?

Frontier, United Airlines and Delta are the top three most popular airlines that fly to State of Washington from Colorado according to our data. Frontier is the first choice among our users, with 34% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 7 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

How many flights depart from Colorado to State of Washington on average per day?

As of December 2025, 26 flights take off from Colorado and land in State of Washington each day. The most common flight departure time for this route is 12:00PM, with 38% of daily flights taking off at noon.

When did momondo last update prices for flights from Colorado to Washington?

Prices for flights from Colorado to Washington are updated daily.

How many operators does momondo search for flights from Colorado to Washington?

The number of operators available for flights from Colorado to Washington is 7 as of December 2025.

How old do you have to be to fly from Colorado to Washington?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Washington.

What documentation or ID do you need to fly to Washington?

The required travel and health documents for your Washington 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 Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$29 Cheap Flights from Colorado to Washington in 2025/26

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Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

11:24 am - 1:34 pm

DEN

SEA

3h 10mnonstop

12:19 pm - 4:10 pm

SEA

DEN

2h 51mnonstop

$57Frontier

Sat, Jan 10 - Sun, Jan 18

9:10 am - 11:21 am

DEN

SEA

3h 11mnonstop

12:26 pm - 4:17 pm

SEA

DEN

2h 51mnonstop

$58Frontier

Thu, Jan 8 - Fri, Jan 9

10:43 am - 12:57 pm

DEN

PAE

3h 14mnonstop

1:52 pm - 5:39 pm

PAE

DEN

2h 47mnonstop

$58Frontier

Fri, Jan 9 - Mon, Jan 12

12:00 pm - 6:29 pm

COS

SEA

7h 29m1 stop

5:25 am - 11:17 am

SEA

COS

4h 52m1 stop

$137Delta

Thu, Jan 8 - Mon, Jan 12

12:00 pm - 6:29 pm

COS

SEA

7h 29m1 stop

10:25 am - 10:23 pm

SEA

COS

10h 58m2 stops

$142Delta

Thu, Jan 8 - Mon, Jan 12

11:50 am - 1:46 pm

DEN

PSC

2h 56mnonstop

5:00 am - 8:40 am

PSC

DEN

2h 40mnonstop

$209United Airlines

Thu, Jan 8 - Tue, Jan 13

1:38 pm - 6:26 pm

GJT

SEA

5h 48m1 stop

5:00 am - 12:40 pm

SEA

GJT

6h 40m1 stop

$211United Airlines

Thu, Jan 15 - Sun, Jan 18

6:10 am - 10:25 am

COS

SEA

5h 15m1 stop

5:15 am - 2:30 pm

SEA

COS

8h 15m1 stop

$225Southwest

Sun, Jan 11 - Tue, Jan 13

5:09 pm - 12:20 am

DEN

PSC

8h 11m1 stop

8:27 am - 11:35 pm

PSC

DEN

14h 08m1 stop

$226Alaska Airlines

Tue, Jan 13 - Sat, Jan 17

1:34 pm - 8:57 pm

DEN

PSC

8h 23m1 stop

6:19 pm - 12:38 pm

PSC

DEN

17h 19m1 stop

$246Alaska Airlines

Mon, Jan 12 - Mon, Jan 19

Frontier flights from Colorado to State of Washington

Our best Frontier deals on Colorado to State of Washington flight tickets

Frontier

Jan 10

DEN11:24 amDenver Intl

3h 10m

SEA1:34 pmSeattle/Tacoma Intl

Jan 17

SEA3:58 pmSeattle/Tacoma Intl

2h 48m

DEN7:46 pmDenver Intl

$57

Find similar

Frontier

Jan 8

DEN9:10 amDenver Intl

3h 11m

SEA11:21 amSeattle/Tacoma Intl

Jan 9

SEA12:26 pmSeattle/Tacoma Intl

2h 51m

DEN4:17 pmDenver Intl

$58

Find similar

Frontier

Jan 29

DEN9:10 amDenver Intl

3h 09m

SEA11:19 amSeattle/Tacoma Intl

Feb 5

SEA12:34 pmSeattle/Tacoma Intl

2h 51m

DEN4:25 pmDenver Intl

$59

Find similar

Delta flights from Colorado to State of Washington

Our best Delta deals on Colorado to State of Washington flight tickets

Delta

Jan 7

DEN12:30 pmDenver Intl

3h 13m

SEA2:43 pmSeattle/Tacoma Intl

Jan 14

SEA7:40 pmSeattle/Tacoma Intl

2h 45m

DEN11:25 pmDenver Intl

$117

Find similar

Delta

Jan 8

COS12:00 pmColorado Springs

7h 29m

1 stop

SEA6:29 pmSeattle/Tacoma Intl

Jan 12

SEA5:25 amSeattle/Tacoma Intl

4h 52m

1 stop

COS11:17 amColorado Springs

$137

Find similar

Delta

Jan 8

COS12:00 pmColorado Springs

7h 29m

1 stop

SEA6:29 pmSeattle/Tacoma Intl

Jan 12

SEA10:25 amSeattle/Tacoma Intl

10h 58m

2 stops

COS10:23 pmColorado Springs

$142

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 1/10

11:24 am-1:34 pm

Nonstop3h 10m

Seattle/Tacoma Intl

Sun 1/18

12:19 pm-4:10 pm

Nonstop2h 51m

$57

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Thu 1/8

9:10 am-11:21 am

Nonstop3h 11m

Seattle/Tacoma Intl

Fri 1/9

12:26 pm-4:17 pm

Nonstop2h 51m

$58

DenverEverett

DEN - PAE

DENPAE

Denver Intl

Fri 1/9

10:43 am-12:57 pm

Nonstop3h 14m

Everett Paine Field

Mon 1/12

1:52 pm-5:39 pm

Nonstop2h 47m

$58

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Thu 1/8

12:00 pm-6:29 pm

1 stop7h 29m

Seattle/Tacoma Intl

Mon 1/12

5:25 am-11:17 am

1 stop4h 52m

$137

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Thu 1/8

12:00 pm-6:29 pm

1 stop7h 29m

Seattle/Tacoma Intl

Mon 1/12

10:25 am-10:23 pm

2 stops10h 58m

$142

DenverPasco

DEN - PSC

DENPSC

Denver Intl

Thu 1/8

11:50 am-1:46 pm

Nonstop2h 56m

Pasco Tri Cities

Tue 1/13

5:00 am-8:40 am

Nonstop2h 40m

$209

Grand JunctionSeattle

GJT - SEA

GJTSEA

Grand Junction Regnl

Thu 1/15

1:38 pm-6:26 pm

1 stop5h 48m

Seattle/Tacoma Intl

Sun 1/18

5:00 am-12:40 pm

1 stop6h 40m

$211

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sun 1/11

6:10 am-10:25 am

1 stop5h 15m

Seattle/Tacoma Intl

Tue 1/13

5:15 am-2:30 pm

1 stop8h 15m

$225

DenverPasco

DEN - PSC

DENPSC

Denver Intl

Tue 1/13

5:09 pm-12:20 am

1 stop8h 11m

Pasco Tri Cities

Sat 1/17

8:27 am-11:35 pm

1 stop14h 08m

$226

DenverPasco

DEN - PSC

DENPSC

Denver Intl

Mon 1/12

1:34 pm-8:57 pm

1 stop8h 23m

Pasco Tri Cities

Mon 1/19

6:19 pm-12:38 pm

1 stop17h 19m

$246

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Colorado to State of Washington

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

Other information

What is the cheapest month to fly to State of Washington?

The month of January is, on average, the cheapest month to fly to State of Washington from Colorado, with most prices found around $172. If you aren’t able to travel to State of Washington during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $187.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Colorado to State of Washington is on a Friday. Travelers who choose to depart for State of Washington on a Friday will often find tickets for as low as $291. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Colorado to State of Washington for around $466.

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

The cheapest time of day to fly to State of Washington is in the evening when flights can be purchased for as low as $276. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $394 on average. Flights to State of Washington from Colorado in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Colorado to Washington flight route?

Fly from Denver Intl to Everett Paine Field for the best Colorado - Washington flight prices

How far in advance should I book a flight to State of Washington?

You are more likely to see cheaper flights to State of Washington from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $211 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Colorado for as low as $180 on momondo.

What cabin class options are available on Colorado to Washington flights?

There are 4 cabin classes available to choose from on Colorado to Washington 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 Colorado to State of Washington flights?

No. A direct flight is the cheapest option for a flight between Colorado to State of Washington.

Cheap Colorado to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to State of Washington

Best Price Found	$29
Fastest flight time	2h 20m
Direct flights	Every day
Airports in State of Washington	96 airports

The best one-way flight to State of Washington from Colorado in the past 72 hours is $29. The best round-trip flight deal from Colorado to State of Washington found on momondo in the last 72 hours is $58.

The fastest flight from Colorado to State of Washington takes 2h 20m

Direct flights go from Colorado to State of Washington every day.

There are 96 airports in State of Washington. From Colorado there are direct flights to Pasco Tri Cities (PSC), Portland (PDX), Spokane (GEG).

Search flight deals

When did momondo last update prices for flights from Colorado to Washington?
Prices for flights from Colorado to Washington are updated daily.
How many operators does momondo search for flights from Colorado to Washington?
The number of operators available for flights from Colorado to Washington is 7 as of December 2025.
How old do you have to be to fly from Colorado to Washington?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Washington.
What documentation or ID do you need to fly to Washington?
The required travel and health documents for your Washington 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 Washington. 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 Colorado to State of Washington?
momondo data reveals that the most frequently booked plane model on the route from Colorado to State of Washington is Boeing 737-800 Passenger/BBJ2 (winglets), representing 13.46% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 12.88%, Boeing 737 MAX 9 at 10.89%, and Boeing 737-800 at 10.70%.

Best airlines flying from Colorado to State of Washington

Compare and see reviews for airlines that fly from Colorado to State of Washington with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $58	Free Cancellation	Rating 5.8 3,082 reviews	Search Frontier flights
Delta	PriceFrom $104	Free Cancellation	Rating 7.9 8,008 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $111	Free Cancellation	Rating 7.8 2,819 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $132	Free Cancellation	Rating 7.4 9,094 reviews	Search United Airlines flights
Southwest	PriceFrom $138	Free Cancellation	Rating 7.9 4,250 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $148	Free Cancellation	Rating 8.0 11,466 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $186	Free Cancellation	Rating 7.2 11,049 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to Washington?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington from Colorado.

Can I find flights from Colorado to Washington with flexible booking policies on momondo?

All flight searches from Colorado to Washington on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Colorado to Washington?

Once all potential Colorado to Washington flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Colorado to Washington flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your State of Washington trip

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Popular cities in Washington

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Cheap flights from Colorado to Washington from $29

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Washington departing on 1/12. 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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Find the cheapest flights from Colorado to Washington

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Frontier flights from Colorado to State of Washington

Our best Frontier deals on Colorado to State of Washington flight tickets

Delta flights from Colorado to State of Washington

Our best Delta deals on Colorado to State of Washington flight tickets

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How to get the cheapest flight ticket from Colorado to State of Washington

What is the cheapest month to fly to State of Washington?

What is the cheapest day to depart on your flight to State of Washington?

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

What is the cheapest Colorado to Washington flight route?

Fly from Denver Intl to Everett Paine Field for the best Colorado - Washington flight prices

How far in advance should I book a flight to State of Washington?

What cabin class options are available on Colorado to Washington flights?

There are 4 cabin classes available to choose from on Colorado to Washington 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 Colorado to State of Washington flights?

No. A direct flight is the cheapest option for a flight between Colorado to State of Washington.

What is the cheapest airline that flies from Colorado to Washington?

Frontier, Alaska Airlines, and United Airlines are the most popular carriers operating from Colorado to Washington

What airlines fly to State of Washington?

How many flights depart from Colorado to State of Washington on average per day?

As of December 2025, 26 flights take off from Colorado and land in State of Washington each day. The most common flight departure time for this route is 12:00PM, with 38% of daily flights taking off at noon.

How many flights depart from Colorado to State of Washington on average per week?

183 flights are operational weekly from Colorado to State of Washington as of December 2025. The most popular departure day for this route is Tue, with 33% of flights per week taking off on this day.

How long is the flight from Colorado to State of Washington?

If you’re flying from a popular airport in Colorado, such as Denver or Vail, and flying into State of Washington, then you can expect flight times to average 2h 59m and 3h 11m, respectively.

Cheap Colorado to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to State of Washington

Best Price Found

Fastest flight time

Direct flights

Airports in State of Washington

When did momondo last update prices for flights from Colorado to Washington?

How many operators does momondo search for flights from Colorado to Washington?

How old do you have to be to fly from Colorado to Washington?

What documentation or ID do you need to fly to Washington?

What is the most popular plane model from Colorado to State of Washington?

Best airlines flying from Colorado to State of Washington

Compare and see reviews for airlines that fly from Colorado to State of Washington with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to Washington?

Can I find flights from Colorado to Washington with flexible booking policies on momondo?

How can momondo help me find flights from Colorado to Washington?

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

An easier way to manage your State of Washington 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 Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo