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$238+ 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CPR
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
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 October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$238
(United Airlines)

Popular in

July

Cheapest in

February

Average price

$393
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. 26% potential increase in price ($166 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 23, 2025.

This United Airlines deal was found by Cheapflights users on 10/22. 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 11/203:48 pmSEA - CPR
1 stop5h 10mUnited Airlines
Sun 11/236:05 pmCPR - SEA
1 stop6h 05mUnited Airlines
Deal found 10/22$238
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/83:48 pmSEA - CPR
1 stop5h 10mUnited Airlines
Tue 11/115:30 amCPR - SEA
1 stop6h 05mUnited Airlines
Deal found 10/20$243
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/58:36 amSEA - CPR
1 stop7h 17mUnited Airlines
Sun 11/911:20 amCPR - SEA
1 stop7h 50mUnited Airlines
Deal found 10/21$248
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/81:20 pmSEA - CPR
2 stops7h 38mUnited Airlines
Tue 1/65:30 amCPR - SEA
1 stop5h 25mUnited Airlines
Deal found 10/21$249
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/88:36 amSEA - CPR
1 stop5h 05mUnited Airlines
Thu 1/81:16 pmCPR - SEA
1 stop6h 10mUnited Airlines
Deal found 10/23$264
This United Airlines deal was found by Cheapflights users on 10/21. 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 10/305:05 amSEA - CPR
1 stop6h 26mUnited Airlines
Tue 11/45:30 amCPR - SEA
1 stop6h 05mUnited Airlines
Deal found 10/21$273

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 October 23, 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 11/20

3:48 pm-9:58 pm

1 stop5h 10m

Casper Natrona County

Sun 11/23

6:05 pm-11:10 pm

1 stop6h 05m

$238

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 11/8

3:48 pm-9:58 pm

1 stop5h 10m

Casper Natrona County

Tue 1/6

5:30 am-9:55 am

1 stop5h 25m

$243

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 11/8

12:00 pm-7:17 pm

1 stop6h 17m

Casper Natrona County

Tue 11/11

5:30 am-1:38 pm

2 stops9h 08m

$249

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 11/8

8:36 am-2:41 pm

1 stop5h 05m

Casper Natrona County

Thu 1/8

9:00 am-6:27 pm

2 stops10h 27m

$249

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 11/5

1:20 pm-9:58 pm

2 stops7h 38m

Casper Natrona County

Sun 11/9

5:30 am-1:38 pm

2 stops9h 08m

$259

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 11/5

8:36 am-2:41 pm

1 stop5h 05m

Casper Natrona County

Thu 1/8

9:00 am-6:27 pm

2 stops10h 27m

$279

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Fri 11/14

5:05 am-12:31 pm

1 stop6h 26m

$268

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 11/5

12:00 pm-7:17 pm

1 stop6h 17m

$374

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 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 time of day to fly from SEA to CPR?

Find hourly flight availability from Seattle to Casper. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 23, 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Casper in the evening. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight in the afternoon.

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 October 23, 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
8,995 reviews

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

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
8,995 reviews
United Airlines
7.4
Good
8,995 reviews

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

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 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 5h 10m. 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 48% 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

Traveling to a place near Casper?

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Rawlins

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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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$238Average$424FlexibilityNo cancel feeOn-time69%

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