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$258+ Cheap flights from Seattle to Casper (SEA - CPR)

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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CPR
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
1 adult, Economy
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Cheap flight deals from Seattle to Casper

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Casper (CPR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 12, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$258
(United Airlines)

Popular in

July

Cheapest in

September

Average price

$441
Provider with most accurate pricing for Seattle/Tacoma Intl-Casper Natrona County flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Casper Natrona County flights.
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From Seattle/Tacoma Intl to Casper Natrona County
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Highest demand for flights based on searches. 22% potential increase in price ($142 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Seattle to Casper

Cheapest flights from Seattle to Casper
Explore the most affordable flight options available from Seattle to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 12, 2026.

This United Airlines deal was found by Cheapflights users on 1/10. 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 5/235:07 am
SEA
-
CPR
1 stop6h 28m
United Airlines
Sat 5/306:01 pm
CPR
-
SEA
1 stop5h 58m
United Airlines
Deal found 1/10$258
This United Airlines deal was found by Cheapflights users on 1/10. 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 1/278:40 am
SEA
-
CPR
1 stop7h 14m
United Airlines
Sat 1/319:00 am
CPR
-
SEA
1 stop10h 26m
United Airlines
Deal found 1/10$333
This United Airlines deal was found by Cheapflights users on 1/11. 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 1/245:00 am
SEA
-
CPR
1 stop4h 53m
United Airlines
Sun 1/255:30 am
CPR
-
SEA
1 stop5h 25m
United Airlines
Deal found 1/11$368
This United Airlines deal was found by Cheapflights users on 1/12. 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 6/46:30 am
SEA
-
CPR
2 stops9h 34m
United Airlines
Sat 6/136:01 pm
CPR
-
SEA
1 stop5h 58m
United Airlines
Deal found 1/12$424
This United Airlines deal was found by Cheapflights users on 1/12. 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 1/289:25 am
SEA
-
CPR
2 stops10h 15m
United Airlines
Sun 2/11:16 pm
CPR
-
SEA
2 stops9h 42m
United Airlines
Deal found 1/12$435

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 January 12, 2026.
Use the filters below to find and compare flights from Seattle to Casper that are best for you.

Fly from

Seattle

Fly to

Casper

Route

Depart

Return

Price

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 5/23

5:07 am-12:35 pm

1 stop6h 28m

Casper Natrona County

Sat 5/30

6:01 pm-10:59 pm

1 stop5h 58m

$258

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 1/27

8:40 am-4:54 pm

1 stop7h 14m

Casper Natrona County

Sat 1/31

9:00 am-6:26 pm

1 stop10h 26m

$333

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 1/28

8:40 am-4:54 pm

1 stop7h 14m

Casper Natrona County

Sun 2/1

5:30 am-9:55 am

1 stop5h 25m

$338

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 1/24

5:00 am-10:53 am

1 stop4h 53m

Casper Natrona County

Sun 1/25

5:30 am-9:55 am

1 stop5h 25m

$368

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Mon 3/30

5:45 pm-10:47 am

2 stops16h 02m

$391

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/11

Compare providers for flights from Seattle to Casper

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Casper in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Casper flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Casper flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Casper flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Casper flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Casper flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Casper

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

Reviews of airlines servicing Casper

Get insights into the airlines that provide service to Casper. 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 Casper. Reviews last updated January 12, 2026.
Read through reviews of airlines operating flights from Seattle to Casper, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,143 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,143 reviews
United Airlines
7.4
Good
9,143 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

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

  • How long is the flight from Seattle to Casper?

    There are many flights that can get you from Seattle to Casper in 6h 28m. Fly via United Airlines to get the fastest option. Airlines will cover a distance of 831 mi.

  • What is the cheapest airline to fly from Seattle to Casper round-trip?

    United Airlines, at $238, was found to be the cheapest airline from Seattle to Casper.. This flight start at 51% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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.

See more FAQs

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Top airline flying from Seattle to Casper

Discover the top airline that operate flights from Seattle 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 January 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$238Average$423FlexibilityNo cancel feeOn-time69%

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