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$328+ Cheap flights from Casper to Seattle (CPR - SEA)

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — SEA
May 22 — May 291
Fri 5/22
Fri 5/29
1 adult, Economy
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Cheap flight deals from Casper to Seattle

Cheapest flights from Casper to Seattle
Explore the most affordable flight options available from Casper to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 22, 2026.

This United Airlines deal was found by Cheapflights users on 4/19. 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 5/511:23 am
CPR
-
SEA
1 stop7h 37m
United Airlines
Sat 5/95:02 am
SEA
-
CPR
1 stop6h 39m
United Airlines
Deal found 4/19$328
This United Airlines deal was found by Cheapflights users on 4/20. 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 11/76:01 pm
CPR
-
SEA
1 stop5h 58m
United Airlines
Sun 11/155:07 am
SEA
-
CPR
1 stop4h 46m
United Airlines
Deal found 4/20$398
This United Airlines deal was found by Cheapflights users on 4/19. 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.
Wed 12/21:25 pm
CPR
-
SEA
2 stops9h 31m
United Airlines
Sat 12/59:02 am
SEA
-
CPR
2 stops12h 10m
United Airlines
Deal found 4/19$409
This United Airlines deal was found by Cheapflights users on 4/20. 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 4/2511:22 am
CPR
-
SEA
1 stop7h 39m
United Airlines
Tue 4/285:00 am
SEA
-
CPR
1 stop4h 47m
United Airlines
Deal found 4/20$423
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Tue 5/125:25 am
CPR
-
SEA
1 stop5h 15m
United Airlines
Fri 5/157:05 pm
SEA
-
CPR
1 stop16h 36m
United Airlines
Deal found 4/20$506

Find flight deals from Casper to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Casper (CPR) to Seattle (SEA). 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 April 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$328
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$358
Provider with most accurate pricing for Casper Natrona County-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Casper Natrona County-Seattle/Tacoma Intl flights.
Search Deals
From Casper Natrona County to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 31% potential increase in price ($219 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Casper to Seattle 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 April 22, 2026.
Use the filters below to find and compare flights from Casper to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Tue 5/5

11:23 am-6:00 pm

1 stop7h 37m

Seattle/Tacoma Intl

Sat 5/9

5:02 am-12:41 pm

1 stop6h 39m

$328

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 6/10

3:15 pm-11:10 pm

1 stop8h 55m

Seattle/Tacoma Intl

Thu 6/18

5:00 am-10:46 am

1 stop4h 46m

$534
Quickest round-trip

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Tue 8/11

5:15 am-10:03 am

1 stop5h 48m

Seattle/Tacoma Intl

Thu 8/13

11:05 am-7:14 pm

1 stop7h 09m

$546

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Thu 6/11

6:13 pm-11:10 pm

1 stop5h 57m

Seattle/Tacoma Intl

Mon 6/15

7:54 pm-8:51 am

1 stop11h 57m

$555

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Mon 7/27

3:15 pm-1:29 am

2 stops11h 14m

Seattle/Tacoma Intl

Fri 7/31

6:30 am-9:59 pm

2 stops14h 29m

$637

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sun 6/7

8:45 am-9:59 pm

2 stops14h 14m

Seattle/Tacoma Intl

Tue 6/16

8:56 am-7:15 pm

1 stop9h 19m

$653
Cheapest one-way
Quickest one-way

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Thu 4/30

3:14 pm-9:06 pm

1 stop6h 52m

$423

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/19

Sorted by cheapest first

Compare providers for flights from Casper to Seattle

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 Casper to Seattle in April.
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 Casper-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Casper-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Casper-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Casper-Seattle 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 Casper-Seattle 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 Casper to Seattle

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

How much does it cost to fly round-trip from Casper to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated April 22, 2026.
See what other customers who have flown with United Airlines from Casper to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,625 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,625 reviews
United Airlines
7.4
Good
9,625 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Related info for your journey

Find useful and relevant information for your journey from Casper to Seattle. 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 Casper to Seattle?

    There are many flights that can get you from Casper to Seattle in 7h 37m. Fly via United Airlines to get the fastest option. The distance from Casper to Seattle is about 831 mi.

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

    Flying on United Airlines is currently your cheapest option to Seattle, with prices starting at $273. You may be able to fly from Casper to Seattle for 41% less than the average price by searching for this airline.

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

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

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

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

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

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

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Kent
Tumwater
Tukwila
Puyallup
Renton
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Casper to Seattle

Discover the top airline that operate flights from Casper to Seattle. 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 April 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$273Average$462FlexibilityNo cancel feeOn-time69%

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