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Casper

$243+ Cheap flights from Washington to Casper (CPR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CPR
Mar 22 — Mar 291
Sun 3/22
Sun 3/29
1 adult, Economy
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Cheap flight deals from Washington to Casper

Cheapest flights from Washington to Casper
Explore the most affordable flight options available from Washington to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2026.

This United Airlines deal was found by Cheapflights users on 2/18. 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 5/14:15 pm
PDX
-
CPR
1 stop4h 55m
United Airlines
Mon 5/43:14 pm
CPR
-
PDX
1 stop6h 55m
United Airlines
Deal found 2/18$258
This United Airlines deal was found by Cheapflights users on 2/20. 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 3/78:59 am
SEA
-
CPR
1 stop4h 41m
United Airlines
Wed 3/115:55 pm
CPR
-
SEA
1 stop6h 04m
United Airlines
Deal found 2/20$268
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Wed 3/44:00 pm
PDX
-
CPR
1 stop5h 09m
United Airlines
Sun 3/85:25 am
CPR
-
PDX
1 stop5h 29m
United Airlines
Deal found 2/17$268
This United Airlines deal was found by Cheapflights users on 2/17. 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 3/55:00 am
GEG
-
CPR
1 stop4h 51m
United Airlines
Mon 3/93:15 pm
CPR
-
GEG
1 stop7h 03m
United Airlines
Deal found 2/17$268
This United Airlines deal was found by Cheapflights users on 2/20. 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 4/243:48 pm
SEA
-
CPR
1 stop5h 19m
United Airlines
Sun 4/265:55 pm
CPR
-
SEA
1 stop5h 38m
United Airlines
Deal found 2/20$277
This United Airlines deal was found by Cheapflights users on 2/20. 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 5/214:08 pm
GEG
-
CPR
1 stop4h 51m
United Airlines
Tue 5/268:45 am
CPR
-
GEG
1 stop7h 27m
United Airlines
Deal found 2/20$281
This United Airlines deal was found by Cheapflights users on 2/16. 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.
Tue 10/278:30 am
SEA
-
CPR
1 stop9h 07m
United Airlines
Sat 10/311:25 pm
CPR
-
SEA
1 stop5h 44m
United Airlines
Deal found 2/16$328
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 10/2712:40 pm
PDX
-
CPR
1 stop8h 32m
United Airlines
Sat 10/313:15 pm
CPR
-
PDX
1 stop6h 34m
United Airlines
Deal found 2/19$328
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 5/51:41 pm
GEG
-
CPR
1 stop7h 29m
United Airlines
Tue 5/199:00 am
CPR
-
GEG
1 stop4h 39m
United Airlines
Deal found 2/19$334
This United Airlines deal was found by Cheapflights users on 2/19. 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 3/65:00 am
GEG
-
CPR
1 stop8h 40m
United Airlines
Tue 3/101:25 pm
CPR
-
GEG
1 stop8h 53m
United Airlines
Deal found 2/19$338
This United Airlines deal was found by Cheapflights users on 2/19. 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 2/205:00 am
SEA
-
CPR
1 stop4h 51m
United Airlines
Fri 2/273:15 pm
CPR
-
SEA
1 stop6h 57m
United Airlines
Deal found 2/19$343
This United Airlines deal was found by Cheapflights users on 2/16. 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 7/92:36 pm
SEA
-
CPR
1 stop4h 44m
United Airlines
Mon 7/136:08 pm
CPR
-
SEA
1 stop6h 01m
United Airlines
Deal found 2/16$348

Find flight deals from Washington to Casper

Keep the following information in mind while searching for Washington to Casper flight deals. Data was last updated February 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$258
(United Airlines)

One-way from

$243
(United Airlines)

Popular in

July

Cheapest in

September

Average price

$438
Provider with most accurate pricing for Seattle/Tacoma Intl-Casper Natrona County flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Casper Natrona County flights.
Search Deals
From Washington to Casper Natrona County
Search Deals
One-way flight from Washington to Casper Natrona County
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($167 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Casper 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 February 20, 2026.
Use the filters below to find and compare flights from Washington to Casper that are best for you.

Fly from

Washington

Fly to

Casper

Route

Depart

Return

Price

PortlandCasper

PDX - CPR

PDXCPR

Portland

Fri 5/1

4:15 pm-10:10 pm

1 stop4h 55m

Casper Natrona County

Mon 5/4

3:14 pm-9:09 pm

1 stop6h 55m

$258

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 3/7

5:00 am-10:51 am

1 stop4h 51m

Casper Natrona County

Tue 3/10

11:26 am-6:04 pm

1 stop7h 38m

$268

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Fri 3/6

3:40 pm-9:59 pm

1 stop5h 19m

Casper Natrona County

Tue 3/10

1:25 pm-6:04 pm

1 stop5h 39m

$268

PortlandCasper

PDX - CPR

PDXCPR

Portland

Wed 3/4

4:00 pm-10:09 pm

1 stop5h 09m

Casper Natrona County

Sun 3/8

5:25 am-9:54 am

1 stop5h 29m

$268

SpokaneCasper

GEG - CPR

GEGCPR

Spokane

Thu 3/5

5:00 am-10:51 am

1 stop4h 51m

Casper Natrona County

Mon 3/9

3:15 pm-9:18 pm

1 stop7h 03m

$268

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 3/7

8:59 am-2:40 pm

1 stop4h 41m

Casper Natrona County

Wed 3/11

1:25 pm-11:16 pm

2 stops10h 51m

$274

SpokaneCasper

GEG - CPR

GEGCPR

Spokane

Tue 5/5

1:41 pm-10:10 pm

1 stop7h 29m

Casper Natrona County

Tue 5/19

9:00 am-12:39 pm

1 stop4h 39m

$334

SpokaneCasper

GEG - CPR

GEGCPR

Spokane

Fri 3/6

5:00 am-2:40 pm

1 stop8h 40m

Casper Natrona County

Tue 3/10

1:25 pm-9:18 pm

1 stop8h 53m

$338

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Fri 4/24

6:00 am-6:59 pm

2 stops11h 59m

Casper Natrona County

Sun 4/26

5:25 am-7:45 pm

2 stops15h 20m

$339

PortlandCasper

PDX - CPR

PDXCPR

Portland

Thu 3/5

5:30 am-6:57 pm

2 stops12h 27m

Casper Natrona County

Mon 3/9

5:25 am-9:54 am

1 stop5h 29m

$359

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/17

Showing 1-10 of 18 results
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Best time to book a flight from Washington to Casper

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

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

Currently, October is the cheapest month in which you can book a flight from State of Washington to Casper (average of $238). Flying from State of Washington to Casper in July is currently the most expensive (average of $817). 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.

Related info for your journey

Find useful and relevant information for your journey from Washington to Casper. 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 into for flights to Casper from Washington?

    Most people fly into Casper Natrona County (CPR) if they book a flight to Casper from Washington. Natrona County is conveniently located just 8.1 mi from Casper’s city center.

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

    A quick flight from State of Washington to Casper can take about 4h 55m. United Airlines provides one of the quickest options available for as low as $258. The distance between State of Washington and Casper is about 817 mi.

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

    The most popular route from State of Washington to Casper is Seattle/Tacoma Intl - Casper Natrona County. You may also consider Portland - Casper Natrona County or Spokane - Casper Natrona County.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from State of Washington to Casper (average of $238). Flying from State of Washington to Casper in July is currently the most expensive (average of $817). 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 airline flying from Washington to Casper

Discover the top airline that operate flights from Washington to Casper. 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 February 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$238Average$458FlexibilityNo cancel feeOn-time69%

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