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$318+ 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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CPR
Apr 17 — Apr 241
Fri 4/17
Fri 4/24
1 adult, Economy
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Cheap 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 March 18, 2026.

This United Airlines deal was found by Cheapflights users on 3/14. 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 4/245:00 am
SEA
-
CPR
1 stop4h 47m
United Airlines
Sun 4/265:25 am
CPR
-
SEA
1 stop5h 21m
United Airlines
Deal found 3/14$318
This United Airlines deal was found by Cheapflights users on 3/16. 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 3/315:00 am
SEA
-
CPR
1 stop4h 47m
United Airlines
Sat 4/49:05 am
CPR
-
SEA
1 stop5h 12m
United Airlines
Deal found 3/16$328
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/188:51 am
SEA
-
CPR
1 stop9h 08m
United Airlines
Wed 4/225:25 am
CPR
-
SEA
1 stop5h 21m
United Airlines
Deal found 3/15$388
This United Airlines deal was found by Cheapflights users on 3/15. 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 6/45:00 am
SEA
-
CPR
1 stop4h 46m
United Airlines
Mon 6/89:26 am
CPR
-
SEA
1 stop9h 33m
United Airlines
Deal found 3/15$423
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/25:00 am
SEA
-
CPR
1 stop8h 39m
United Airlines
Tue 4/75:25 am
CPR
-
SEA
2 stops10h 21m
United Airlines
Deal found 3/15$429
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Thu 4/25:00 am
SEA
-
CPR
1 stop4h 47m
United Airlines
Mon 4/65:25 am
CPR
-
SEA
1 stop5h 21m
United Airlines
Deal found 3/18$435

Find 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 March 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(United Airlines)

Popular in

July

Cheapest in

September

Average price

$432
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 Seattle/Tacoma Intl to Casper Natrona County
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($161 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 18, 2026.
Use the filters below to find and compare flights from Seattle to Casper that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Fri 4/24

5:00 am-10:47 am

1 stop4h 47m

Casper Natrona County

Sun 4/26

5:25 am-9:46 am

1 stop5h 21m

$318

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 4/18

3:48 pm-10:07 pm

1 stop5h 19m

Casper Natrona County

Wed 4/22

5:25 am-9:46 am

1 stop5h 21m

$388

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 6/4

5:00 am-10:46 am

1 stop4h 46m

Casper Natrona County

Mon 6/8

9:26 am-9:59 pm

2 stops13h 33m

$394

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 4/2

5:00 am-2:39 pm

1 stop8h 39m

Casper Natrona County

Tue 4/7

5:25 am-9:46 am

1 stop5h 21m

$423
Cheapest one-way
Quickest one-way

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 4/1

12:54 pm-8:26 pm

1 stop6h 32m

$358

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 4/2

5:00 am-12:46 pm

1 stop6h 46m

$358

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 4/4

7:11 am-8:26 pm

2 stops12h 15m

$369

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 3/31

8:55 am-5:02 pm

1 stop7h 07m

$413

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Fri 4/3

7:12 am-10:07 pm

2 stops13h 55m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Sorted by cheapest first

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Casper flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Casper

What is the cheapest month to book a flight from Seattle to Casper?

Currently, October is the cheapest month in which you can book a flight from Seattle to Casper (average of $238). Flying from Seattle 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.

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 March 18, 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
9,435 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

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
9,435 reviews
United Airlines
7.4
Good
9,435 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

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 4h 47m. 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 49% 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.

  • What is the cheapest month to book a flight from Seattle to Casper?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Casper (average of $238). Flying from Seattle 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

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.

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 March 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$238Average$423FlexibilityNo cancel feeOn-time69%

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