HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington

$248+ Cheap flights from Casper (CPR) to Washington

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — SEA
Nov 1 — Nov 81
Sat 11/1
Sat 11/8
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Casper to Washington with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Casper to Washington

Keep the following information in mind while searching for Casper to Washington flight deals. Data was last updated October 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$248
(United Airlines)

Popular in

October

Cheapest in

February

Average price

$650
Provider with most accurate pricing for Casper Natrona County-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Casper Natrona County-Seattle/Tacoma Intl flights.
Search Deals
From Casper Natrona County to Washington
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Casper to Washington

Cheapest flights from Casper to Washington
Explore the most affordable flight options available from Casper to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 2, 2025.

This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/171:32 pmCPR - SEA
1 stop5h 21mUnited Airlines
Tue 10/215:00 amSEA - CPR
1 stop4h 47mUnited Airlines
Deal found 10/1$248
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:00 amCPR - SEA
1 stop7h 42mUnited Airlines
Sat 11/18:36 amSEA - CPR
1 stop7h 17mUnited Airlines
Deal found 10/1$257
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/168:55 amCPR - SEA
1 stop7h 37mUnited Airlines
Mon 10/205:00 amSEA - CPR
1 stop4h 47mUnited Airlines
Deal found 9/30$272
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2511:22 amCPR - SEA
1 stop7h 31mUnited Airlines
Tue 10/283:48 pmSEA - CPR
1 stop5h 10mUnited Airlines
Deal found 10/2$296
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:30 amCPR - PDX
1 stop4h 59mUnited Airlines
Mon 10/2010:50 amPDX - CPR
1 stop6h 57mUnited Airlines
Deal found 10/1$305
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:05 pmCPR - PDX
1 stop5h 51mUnited Airlines
Sat 11/18:30 amPDX - CPR
1 stop7h 23mUnited Airlines
Deal found 10/1$308
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/226:05 pmCPR - SEA
1 stop6h 05mUnited Airlines
Sat 12/65:05 amSEA - CPR
1 stop8h 33mUnited Airlines
Deal found 10/2$308
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:00 pmCPR - PDX
1 stop5h 46mUnited Airlines
Thu 10/95:00 amPDX - CPR
1 stop4h 47mUnited Airlines
Deal found 10/1$313
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:30 amCPR - PDX
1 stop5h 08mUnited Airlines
Sun 12/75:00 amPDX - CPR
1 stop6h 31mUnited Airlines
Deal found 9/30$316
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/48:55 amCPR - PDX
1 stop5h 08mUnited Airlines
Mon 10/65:00 amPDX - CPR
1 stop4h 47mUnited Airlines
Deal found 9/30$328
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/61:32 pmCPR - GEG
1 stop7h 52mUnited Airlines
Wed 10/85:05 amGEG - CPR
1 stop6h 36mUnited Airlines
Deal found 10/2$888

Cheapflights Fare Finder

 
Customize your flight search to find flights from Casper to Washington 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 2,558,603 searches. Data last updated October 2, 2025.
Use the filters below to find and compare flights from Casper to Washington that are best for you.

Fly from

Casper

Fly to

Washington

Route

Depart

Return

Price

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Fri 10/17

1:32 pm-5:53 pm

1 stop5h 21m

Seattle/Tacoma Intl

Tue 10/21

5:00 am-10:47 am

1 stop4h 47m

$248

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Thu 10/16

8:55 am-3:32 pm

1 stop7h 37m

Seattle/Tacoma Intl

Mon 10/20

5:00 am-10:47 am

1 stop4h 47m

$272

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sat 10/25

11:22 am-5:53 pm

1 stop7h 31m

Seattle/Tacoma Intl

Tue 10/28

3:48 pm-9:58 pm

1 stop5h 10m

$296

CasperPortland

CPR - PDX

CPRPDX

Casper Natrona County

Thu 10/30

6:05 pm-10:56 pm

1 stop5h 51m

Portland

Sat 11/1

8:30 am-4:53 pm

1 stop7h 23m

$308

CasperPortland

CPR - PDX

CPRPDX

Casper Natrona County

Sat 3/7

1:25 pm-5:38 pm

1 stop5h 13m

Portland

Tue 3/10

9:10 am-5:04 pm

1 stop6h 54m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sat 2/28

1:25 pm-6:10 pm

1 stop5h 45m

Seattle/Tacoma Intl

Tue 3/3

12:46 pm-7:02 pm

1 stop5h 16m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sat 11/22

6:05 pm-11:10 pm

1 stop6h 05m

Seattle/Tacoma Intl

Sat 12/6

5:05 am-12:31 pm

1 stop6h 26m

$308

CasperPortland

CPR - PDX

CPRPDX

Casper Natrona County

Thu 12/4

9:03 am-10:52 pm

2 stops14h 49m

Portland

Sun 12/7

5:00 am-2:38 pm

1 stop8h 38m

$314

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/1

Best time to book a flight from Casper to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Casper 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 Casper to Washington

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

Currently, January is the cheapest month in which you can book a flight from Casper to State of Washington (average of $238). Flying from Casper to State of Washington in June is currently the most expensive (average of $388). 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.

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

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated October 2, 2025.
Read reviews from past customers who have flown United Airlines from Casper to Washington. 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.
United Airlines
7.4
Good
8,929 reviews

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

Related info for your journey

Find useful and relevant information for your journey from Casper to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Casper to Washington?

    Casper Natrona County (CPR), located 8.1 mi from the city center, is the airport you fly out of when you book flights from Casper to Washington.

  • How long is the flight from Casper to State of Washington?

    Airlines like United Airlines fly from Casper to State of Washington in about 5h 21m. The time it takes to get you to your destination can typically vary by up to . The distance from Casper to State of Washington is about 831 mi.

  • What are the most popular routes from Casper to State of Washington?

    The most popular flight routes from Casper to State of Washington are Casper Natrona County - Seattle/Tacoma Intl, Casper Natrona County - Portland and Casper Natrona County - Spokane.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Casper to State of Washington (average of $238). Flying from Casper to State of Washington in June is currently the most expensive (average of $388). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Casper to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Las Vegas flights
Denver to O'Hare Intl flights
Denver to LaGuardia flights
Denver to Dallas/Fort Worth flights
Denver to John F Kennedy Intl flights
Denver to Orlando flights
Denver to Newark flights
Denver to Seattle flights
Denver to Miami flights
Denver to Los Angeles flights
Denver to Sky Harbor Intl flights
Salt Lake City to Seattle flights
Denver to Atlanta flights
Denver to Midway flights
Salt Lake City to Los Angeles flights
Denver to San Francisco flights
Denver to Hobby flights
Denver to Charlotte flights
Denver to Tampa flights
Denver to Philadelphia flights
Denver to Boston flights
Salt Lake City to Las Vegas flights
Denver to Baltimore flights
Salt Lake City to Dallas/Fort Worth flights
Denver to Cincinnati flights
Salt Lake City to Sky Harbor Intl flights
Denver to Ontario flights
Salt Lake City to Orlando flights
Denver to Portland flights
Denver to Fort Lauderdale flights
Denver to Minneapolis flights
Salt Lake City to Honolulu flights
Denver to New Orleans flights
Denver to Honolulu flights
Denver to Dulles Intl flights
Denver to George Bush Intcntl flights
Denver to Santa Ana flights
Denver to Nashville flights
Salt Lake City to Hobby flights
Denver to Austin flights
Salt Lake City to Miami flights
Denver to Detroit flights
Salt Lake City to Boston flights
Denver to Reagan-National flights
Salt Lake City to John F Kennedy Intl flights
Denver to San Diego flights
Salt Lake City to San Diego flights
Salt Lake City to Dulles Intl flights
Denver to Kailua-Kona flights
Denver to Kansas City flights

Top airline flying from Casper to Washington

Discover the top airline that operate flights from Casper to Washington. 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 2,558,603 searches. Data last updated October 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$256Average$456FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.