What airlines fly to State of Washington?

Frontier, United Airlines and Alaska Airlines 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 36% 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 long is the flight from Colorado to State of Washington?

If you’re flying from a popular airport in Colorado, such as Denver or Colorado Springs, and flying into State of Washington, then you can expect flight times to average 2h 55m and 4h 44m, respectively.

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

Delta, United Airlines, and Southwest are the most popular carriers operating from Colorado to Washington

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

346 flights are operational weekly from Colorado to State of Washington as of April 2026. The most popular departure day for this route is Fri, with 18% of flights per week taking off on this day.

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

As of April 2026, 49 flights take off from Colorado and land in State of Washington each day. The most common flight departure time for this route is 11:00AM, with 56% 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 April 2026.

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.

$65 Cheap Flights from Colorado to Washington in 2026

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Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 10:06 am

DEN

SEA

3h 06mnonstop

7:50 pm - 11:54 pm

SEA

DEN

3h 04mnonstop

$92Frontier

Sun, May 24 - Sat, May 30

7:50 am - 9:49 am

DEN

SEA

2h 59mnonstop

7:50 pm - 11:54 pm

SEA

DEN

3h 04mnonstop

$96Frontier

Tue, May 5 - Tue, May 12

6:57 pm - 10:54 pm

COS

PDX

4h 57m

1 stop

4:15 pm - 11:59 pm

PDX

COS

6h 44m

1 stop

$217United Airlines

Fri, May 15 - Mon, May 18

7:10 pm - 12:35 am

COS

SEA

6h 25m

1 stop

4:35 pm - 11:45 pm

SEA

COS

6h 10m

1 stop

$217Southwest

Sat, Jun 6 - Tue, Jun 9

11:55 am - 11:55 pm

COS

SEA

13h 00m

2 stops

5:30 am - 11:15 am

SEA

COS

4h 45m

1 stop

$222Delta

Tue, May 12 - Tue, May 19

7:45 am - 6:20 pm

COS

PDX

11h 35m

1 stop

9:35 am - 6:30 pm

PDX

COS

7h 55m

1 stop

$222Southwest

Sat, May 16 - Sat, May 23

11:55 am - 4:44 pm

COS

SEA

5h 49m

1 stop

5:30 am - 11:15 am

SEA

COS

4h 45m

1 stop

$237Delta

Tue, May 12 - Tue, May 19

5:12 pm - 10:54 pm

COS

PDX

6h 42m

1 stop

5:00 am - 12:26 pm

PDX

COS

6h 26m

1 stop

$244United Airlines

Thu, May 7 - Sun, May 10

6:00 am - 12:44 pm

DEN

PSC

7h 44m

1 stop

1:21 pm - 9:49 pm

PSC

DEN

7h 28m

1 stop

$269Alaska Airlines

Sat, May 9 - Tue, May 12

8:00 am - 11:53 am

DEN

PAE

4h 53m

1 stop

12:21 pm - 6:32 pm

PAE

DEN

5h 11m

1 stop

$315Alaska Airlines

Tue, Aug 18 - Wed, Sep 2

Frontier flights from Colorado to State of Washington

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

Frontier

May 24

DEN8:00 amDenver Intl

3h 06m

SEA10:06 amSeattle/Tacoma Intl

May 30

SEA7:50 pmSeattle/Tacoma Intl

3h 04m

DEN11:54 pmDenver Intl

$92

Frontier

May 5

DEN7:50 amDenver Intl

2h 59m

SEA9:49 amSeattle/Tacoma Intl

May 12

SEA7:50 pmSeattle/Tacoma Intl

3h 04m

DEN11:54 pmDenver Intl

$96

Frontier

May 8

DEN7:50 amDenver Intl

2h 59m

SEA9:49 amSeattle/Tacoma Intl

May 12

SEA7:50 pmSeattle/Tacoma Intl

3h 04m

DEN11:54 pmDenver Intl

$97

American Airlines flights from Colorado to State of Washington

Our best American Airlines deals on Colorado to State of Washington flight tickets

American Airlines

May 8

COS5:13 pmColorado Springs

7h 41m

1 stop

PDX11:54 pmPortland

May 11

PDX11:40 pmPortland

8h 47m

1 stop

COS9:27 amColorado Springs

$242

American Airlines

Jun 9

COS3:45 pmColorado Springs

10h 14m

1 stop

SEA12:59 amSeattle/Tacoma Intl

Jun 16

SEA11:24 pmSeattle/Tacoma Intl

9h 30m

1 stop

COS9:54 amColorado Springs

$284

American Airlines

Sep 12

COS3:51 pmColorado Springs

9h 24m

1 stop

SEA12:15 amSeattle/Tacoma Intl

Sep 23

SEA5:05 amSeattle/Tacoma Intl

8h 40m

1 stop

COS2:45 pmColorado Springs

$286

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sun 5/24

8:00 am-10:06 am

Nonstop3h 06m

Seattle/Tacoma Intl

Sat 5/30

7:50 pm-11:54 pm

Nonstop3h 04m

$92

Quickest round-trip

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 5/5

7:50 am-9:49 am

Nonstop2h 59m

Seattle/Tacoma Intl

Tue 5/12

7:50 pm-11:54 pm

Nonstop3h 04m

$96

Colorado SpringsPortland

COS - PDX

COSPDX

Colorado Springs

Fri 5/15

6:57 pm-10:54 pm

1 stop4h 57m

Portland

Mon 5/18

4:15 pm-11:59 pm

1 stop6h 44m

$217

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sat 6/6

7:10 pm-12:35 am

1 stop6h 25m

Seattle/Tacoma Intl

Tue 6/9

4:35 pm-11:45 pm

1 stop6h 10m

$217

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Tue 5/12

11:55 am-11:55 pm

2 stops13h 00m

Seattle/Tacoma Intl

Tue 5/19

5:30 am-11:15 am

1 stop4h 45m

$222

Colorado SpringsPortland

COS - PDX

COSPDX

Colorado Springs

Sat 5/16

7:45 am-6:20 pm

1 stop11h 35m

Portland

Sat 5/23

9:35 am-6:30 pm

1 stop7h 55m

$222

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Tue 5/12

11:55 am-4:44 pm

1 stop5h 49m

Seattle/Tacoma Intl

Tue 5/19

5:30 am-11:15 am

1 stop4h 45m

$237

Colorado SpringsPortland

COS - PDX

COSPDX

Colorado Springs

Thu 5/7

5:12 pm-10:54 pm

1 stop6h 42m

Portland

Sun 5/10

5:00 am-12:26 pm

1 stop6h 26m

$244

DenverPasco

DEN - PSC

DENPSC

Denver Intl

Sat 5/9

6:00 am-12:44 pm

1 stop7h 44m

Pasco Tri Cities

Tue 5/12

1:21 pm-9:49 pm

1 stop7h 28m

$269

DenverEverett

DEN - PAE

DENPAE

Denver Intl

Tue 8/18

8:00 am-11:53 am

1 stop4h 53m

Everett Paine Field

Wed 9/2

12:21 pm-6:32 pm

1 stop5h 11m

$315

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 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

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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 $138. 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 $177.

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 $275. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Colorado to State of Washington for around $397.

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 $264. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $334 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 Seattle/Tacoma Intl 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 $210 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	$114
Fastest flight time	2h 20m
Direct flights	Mon, Tue, Wed, Thu, Fri and Sat
Airports in State of Washington	96 airports

The best one-way flight to State of Washington from Colorado in the past 72 hours is $114. The best round-trip flight deal from Colorado to State of Washington found on momondo in the last 72 hours is $119.

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

Direct flights go from Colorado to State of Washington on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. Airlines offering direct flights are: United Airlines, Delta and Alaska Airlines.

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

Search flight deals

Frequently asked questions about flying from Colorado to Washington

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 April 2026.
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 MAX 8, representing 17.30% of all bookings. The subsequent popular models are Boeing 737-800 at 13.94%, Boeing 737-800 Passenger/BBJ2 (winglets) at 12.91%, and Airbus A321neo at 10.23%.

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 $55	Free Cancellation	Rating 5.7 2,987 reviews	Search Frontier flights
Delta	PriceFrom $88	Free Cancellation	Rating 7.9 8,408 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $107	Free Cancellation	Rating 7.8 2,839 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $116	Free Cancellation	Rating 7.4 9,602 reviews	Search United Airlines flights
Southwest	PriceFrom $117	Free Cancellation	Rating 8.0 4,328 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $126	Free Cancellation	Rating 7.9 12,253 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $186	Free Cancellation	Rating 7.1 11,593 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.

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Cheap flights from Colorado to Washington from $65

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 5/5. 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 Colorado to State of Washington

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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?

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

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

Can stopping save me money on Colorado to State of Washington flights?

What is the cheapest airline that flies 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?

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

How long is the flight from 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

Fastest flight time

Direct flights

Airports in State of Washington

Frequently asked questions about flying from Colorado to 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?

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.

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