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$308+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — SEA
Dec 31 — Jan 71
Wed 12/31
Wed 1/7
1 adult, Economy
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Find 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 December 1, 2025.

This United Airlines deal was found by Cheapflights users on 11/29. 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.
Sun 11/308:55 pmCPR - SEA
1 stop6h 31mUnited Airlines
Sat 12/612:35 pmSEA - CPR
1 stop6h 58mUnited Airlines
Deal found 11/29$343
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/241:22 pmCPR - SEA
1 stop21h 33mUnited Airlines
Wed 12/315:02 amSEA - CPR
1 stop8h 38mUnited Airlines
Deal found 12/1$362
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/315:30 amCPR - SEA
1 stop9h 28mUnited Airlines
Wed 1/78:40 amSEA - CPR
1 stop9h 26mUnited Airlines
Deal found 12/1$409
This United Airlines deal was found by Cheapflights users on 11/30. 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 12/1611:21 amCPR - SEA
2 stops10h 39mUnited Airlines
Sat 12/205:02 amSEA - CPR
1 stop8h 38mUnited Airlines
Deal found 11/30$479
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/273:19 pmCPR - SEA
1 stop8h 53mUnited Airlines
Wed 12/315:02 amSEA - CPR
1 stop8h 38mUnited Airlines
Deal found 12/1$480

Cheap 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 December 1, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$308
(United Airlines)

Popular in

January

Cheapest in

February

Average price

$511
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. 11% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 1, 2025.
Use the filters below to find and compare flights from Casper to Seattle that are best for you.

Fly from

Casper

Fly to

Seattle

Route

Depart

Return

Price

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Tue 1/27

3:17 pm-9:15 pm

1 stop6h 58m

Seattle/Tacoma Intl

Sat 1/31

8:40 am-2:42 pm

1 stop5h 02m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Tue 5/5

5:30 am-9:59 am

1 stop5h 29m

Seattle/Tacoma Intl

Sat 5/16

6:30 am-8:12 pm

2 stops12h 42m

$359

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 12/24

1:22 pm-9:55 am

1 stop21h 33m

Seattle/Tacoma Intl

Wed 12/31

5:02 am-2:40 pm

1 stop8h 38m

$362

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 12/31

5:30 am-1:58 pm

1 stop9h 28m

Seattle/Tacoma Intl

Wed 1/7

8:40 am-7:06 pm

1 stop9h 26m

$409

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Mon 12/8

5:30 am-10:09 am

1 stop5h 39m

$384

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/29

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Casper-Seattle flight deals on Cheapflights vs. eDreams >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 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 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

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

Currently, May is the cheapest month in which you can book a flight from Casper to Seattle (average of $238). Flying from Casper to Seattle in January is currently the most expensive (average of $738). 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 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 December 1, 2025.
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
9,056 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,056 reviews
United Airlines
7.4
Good
9,056 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 6h 58m. 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 $256. You may be able to fly from Casper to Seattle for 44% 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.

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

    Currently, May is the cheapest month in which you can book a flight from Casper to Seattle (average of $238). Flying from Casper to Seattle in January is currently the most expensive (average of $738). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Olympia
Lakewood
Ocean Shores
Tukwila
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Cle Elum
Marysville
Leavenworth
Fife
Issaquah
Aberdeen
Shoreline
Centralia

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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 December 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$256Average$433FlexibilityNo cancel feeOn-time69%

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