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Colorado

$80+ Cheap flights from Washington to Colorado

SEA — DEN
Nov 10 — Nov 171
Tue 11/10
Tue 11/17
1 adult, Economy
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Cheap flight deals from Washington to Colorado

Cheapest flights from Washington to Colorado

Mon 10/194:27 pm -
Nonstop2h 50m
Fri 10/231:07 pm -
Nonstop3h 05m
Deal found 10/9$159
Wed 10/214:27 pm -
Nonstop2h 50m
Wed 10/281:04 pm -
Nonstop3h 08m
Deal found 10/8$160
Mon 10/268:00 pm -
1 stop12h 45m
Fri 11/131:04 pm -
Nonstop3h 08m
Deal found 10/7$162
Mon 10/264:27 pm -
Nonstop2h 50m
Wed 11/1110:44 pm -
1 stop12h 01m
Deal found 10/7$163
Mon 10/264:27 pm -
Nonstop2h 50m
Thu 11/512:54 pm -
1 stop6h 39m
Deal found 10/9$164
Mon 11/164:27 pm -
Nonstop2h 48m
Fri 11/2010:50 pm -
1 stop14h 47m
Deal found 10/6$165
Sat 12/511:00 am -
1 stop26h 55m
Sat 12/121:32 pm -
Nonstop3h 11m
Deal found 10/9$166
Fri 11/66:30 am -
1 stop7h 55m
Fri 11/138:55 pm -
Nonstop3h 10m
Deal found 10/8$167
Thu 12/109:25 am -
Nonstop2h 35m
Tue 12/1512:35 pm -
2 stops7h 05m
Deal found 10/8$168
Tue 11/1010:06 am -
Nonstop2h 52m
Thu 11/123:25 pm -
Nonstop3h 02m
Deal found 10/7$169
Mon 12/79:53 pm -
1 stop10h 23m
Fri 12/111:46 pm -
1 stop8h 02m
Deal found 10/8$170
Thu 11/59:42 am -
1 stop6h 45m
Mon 11/96:08 pm -
1 stop6h 51m
Deal found 10/7$203

Find flight deals from Washington to Colorado

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$159

One-way from

$80
(Expedia)

Popular in

June

Cheapest in

January

Average price

$250

Good round-trip deal

$306 or less

Good one-way deal

$185 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Denver Intl flights.
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From Washington to Colorado
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One-way flight from Washington to Colorado
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Washington to Colorado.
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Price to beat on a one-way flight from Washington to Colorado.
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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleDenver

SEA Seattle/Tacoma Intl - DEN Denver Intl

SEADEN

Seattle/Tacoma Intl

Sat 10/31

12:20 pm-9:27 pm

1 stop8h 07m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$84

SeattleDenver

SEA Seattle/Tacoma Intl - DEN Denver Intl

SEADEN

Seattle/Tacoma Intl

Mon 11/9

12:20 pm-9:27 pm

1 stop8h 07m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$84

SeattleDenver

SEA Seattle/Tacoma Intl - DEN Denver Intl

SEADEN

Seattle/Tacoma Intl

Fri 10/30

12:20 pm-9:27 pm

1 stop8h 07m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$84

SeattleDenver

SEA Seattle/Tacoma Intl - DEN Denver Intl

SEADEN

Seattle/Tacoma Intl

Tue 1/5

6:05 am-3:56 pm

1 stop8h 51m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$89

SeattleDenver

SEA Seattle/Tacoma Intl - DEN Denver Intl

SEADEN

Seattle/Tacoma Intl

Mon 11/9

11:47 pm-9:58 am

1 stop9h 11m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$89

SeattleDenver

SEA Seattle/Tacoma Intl - DEN Denver Intl

SEADEN

Seattle/Tacoma Intl

Sat 11/21

1:25 pm-8:29 pm

1 stop6h 04m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$89

SeattleDenver

SEA Seattle/Tacoma Intl - DEN Denver Intl

SEADEN

Seattle/Tacoma Intl

Fri 11/27

8:30 am-12:17 pm

Nonstop2h 47m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$93

SeattleDenver

SEA Seattle/Tacoma Intl - DEN Denver Intl

SEADEN

Seattle/Tacoma Intl

Sat 11/7

8:55 am-7:50 pm

2 stops9h 55m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$94

SeattleDenver

SEA Seattle/Tacoma Intl - DEN Denver Intl

SEADEN

Seattle/Tacoma Intl

Sun 12/6

7:30 am-5:55 pm

2 stops9h 25m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$94

SpokaneDenver

GEG Spokane - DEN Denver Intl

GEGDEN

Spokane

Tue 12/15

8:03 am-2:24 pm

1 stop5h 21m

Denver Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$119

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/7

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Washington with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Washington to Colorado

What is the cheapest month to book a flight from State of Washington to Colorado?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Colorado (average of $211). Flying from State of Washington to Colorado in June is currently the most expensive (average of $358). 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 WA to CO?

When flying from State of Washington to Colorado, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 12% versus a flight in the morning.

Weekly flight availability from State of Washington to Colorado

The most flights from USWA to USCO are scheduled on a Friday (34 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (22 on average).

How much does it cost to fly round-trip from State of Washington to Colorado?

Airfare is below average for this route at the moment.
State of Washington to Colorado flights typically cost between $181 and $344 in October.
The cheapest round-trip price found within the last 5 days was $159 on Frontier (Oct 19-Oct 23).

How far ahead should I book a flight from State of Washington to Colorado?

The best time to book flights from State of Washington to Colorado is 73 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 day to fly from State of Washington to Colorado?

Travelers seeking maximum savings on their State of Washington to Colorado flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Colorado

Read through reviews of airlines operating flights from Washington to Colorado, such as Alaska Airlines,Southwest, andDelta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
13,047 reviews

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
Alaska Airlines
7.9
Good
13,047 reviews
Alaska Airlines
7.9
Good
13,047 reviews

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
Southwest
7.9
Good
4,222 reviews
Alaska Airlines
7.9
Good
13,047 reviews

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
Delta
7.8
Good
8,655 reviews
Alaska Airlines
7.9
Good
13,047 reviews

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
United Airlines
7.4
Good
10,345 reviews
Alaska Airlines
7.9
Good
13,047 reviews

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
Frontier
5.6
Fair
2,550 reviews
Alaska Airlines
7.9
Good
13,047 reviews

Overall

7.9

Comfort

7.8

Entertainment

7.0

Food

7.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.

Related info for your journey

  • How popular is this State of Washington to Colorado flight route?

    This flight path from Washington to Colorado was viewed by 210 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 State of Washington to Colorado?

    Airlines like Delta, United Airlines, and Southwest fly from State of Washington to Colorado in about 2h 41m. The time it takes to get you to your destination can typically vary by up to 5h 19m. The distance from State of Washington to Colorado is about 1022 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from State of Washington to Colorado one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $25. Users have also found prices from $58 and $58 on Delta and United Airlines, respectively.

  • Can I find deals for flights from Washington to Colorado that include hotel bookings?

    Yes. In addition to deals on Washington to Colorado flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Colorado?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Colorado.

  • Can I find deals for business class flights from Washington to Colorado?

    Yes. Cheapflights offers flight deals from Washington to Colorado 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 State of Washington to Colorado?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Colorado (average of $211). Flying from State of Washington to Colorado in June is currently the most expensive (average of $358). 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

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Top 7 airlines flying from Washington to Colorado

AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$50Average$182FlexibilityNo cancel feeOn-time62%
DeltaCheapest$97Average$314FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$113Average$362FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$117Average$382FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$135Average$420FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$143Average$313FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$274Average$533FlexibilityNo cancel feeOn-time71%

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