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Casper

$243+ Cheap flights from Seattle to Casper (SEA - 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 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CPR
Jan 30 — Feb 61
Fri 1/30
Fri 2/6
1 adult, Economy
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Cheap flight deals from Seattle to Casper

Best flights from Seattle to Casper
Discover carefully curated flight deals from Seattle to Casper that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 31, 2025.

This United Airlines deal was found by Cheapflights users on 12/29. 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 2/125:00 amSEA - CPR
1 stop4h 51mUnited Airlines
Sun 2/155:25 amCPR - SEA
1 stop5h 24mUnited Airlines
Deal found 12/29$258
This United Airlines deal was found by Cheapflights users on 12/28. 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 2/65:00 amSEA - CPR
1 stop4h 53mUnited Airlines
Sun 2/85:30 amCPR - SEA
1 stop5h 25mUnited Airlines
Deal found 12/28$258
This United Airlines deal was found by Cheapflights users on 12/30. 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.
Tue 1/278:40 amSEA - CPR
1 stop5h 02mUnited Airlines
Tue 2/109:00 amCPR - SEA
1 stop5h 57mUnited Airlines
Deal found 12/30$258
This United Airlines deal was found by Cheapflights users on 12/29. 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 1/2112:25 pmSEA - CPR
1 stop5h 41mUnited Airlines
Sat 5/91:25 pmCPR - SEA
2 stops8h 32mUnited Airlines
Deal found 12/29$264
This United Airlines deal was found by Cheapflights users on 12/28. 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 amSEA - CPR
1 stop7h 14mUnited Airlines
Sat 1/311:16 pmCPR - SEA
1 stop6h 10mUnited Airlines
Deal found 12/28$328
This United Airlines deal was found by Cheapflights users on 12/29. 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 1/215:00 amSEA - CPR
1 stop6h 35mUnited Airlines
Wed 5/136:01 pmCPR - SEA
1 stop5h 58mUnited Airlines
Deal found 12/29$329

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 December 31, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$258
(United Airlines)

One-way from

$243
(United Airlines)

Popular in

July

Cheapest in

September

Average price

$541
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.
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From Seattle/Tacoma Intl to Casper Natrona County
Search Deals
One-way flight from Seattle/Tacoma Intl to Casper Natrona County
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($139 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 31, 2025.
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

Thu 2/12

5:00 am-10:51 am

1 stop4h 51m

Casper Natrona County

Sun 2/15

5:25 am-9:49 am

1 stop5h 24m

$258

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Fri 2/6

5:00 am-10:53 am

1 stop4h 53m

Casper Natrona County

Sun 2/8

5:30 am-9:55 am

1 stop5h 25m

$258

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 1/27

8:40 am-2:42 pm

1 stop5h 02m

Casper Natrona County

Tue 2/10

9:00 am-1:57 pm

1 stop5h 57m

$258

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 1/21

12:25 pm-7:06 pm

1 stop5h 41m

Casper Natrona County

Sat 5/9

1:25 pm-8:57 pm

2 stops8h 32m

$264

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

1:16 pm-6:26 pm

1 stop6h 10m

$328

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 1/21

5:00 am-12:35 pm

1 stop6h 35m

Casper Natrona County

Wed 5/13

6:01 pm-10:59 pm

1 stop5h 58m

$329

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Fri 1/30

12:25 pm-7:06 pm

1 stop5h 41m

$243

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 1/3

8:57 am-2:40 pm

1 stop4h 43m

$459

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/30

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 December.
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 December 31, 2025.
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
9,124 reviews

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,124 reviews
United Airlines
7.4
Good
9,124 reviews

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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 51m. 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 December 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$238Average$423FlexibilityNo cancel feeOn-time69%

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