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$344+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — SEA
août 23 — août 301
sam. 8/23
sam. 8/30
1 adult, Economy
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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 août 18, 2025.

Round-trip from

$244
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$557
From Casper Natrona County to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 août 18, 2025.

This United Airlines deal was found by Cheapflights users on 8/16. 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.
mar. 9/97:05 amCPR - SEA
1 stop9h 47mUnited Airlines
lun. 9/296:35 amSEA - CPR
2 stops12h 42mUnited Airlines
Deal found 8/16$344
This United Airlines deal was found by Cheapflights users on 8/17. 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.
dim. 9/75:50 pmCPR - SEA
1 stop6h 09mUnited Airlines
dim. 9/145:02 amSEA - CPR
1 stop4h 48mUnited Airlines
Deal found 8/17$394
This United Airlines deal was found by Cheapflights users on 8/16. 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.
sam. 8/309:10 amCPR - SEA
1 stop9h 48mUnited Airlines
mer. 9/311:11 amSEA - CPR
1 stop6h 58mUnited Airlines
Deal found 8/16$399
This United Airlines deal was found by Cheapflights users on 8/17. 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.
dim. 11/236:05 pmCPR - SEA
1 stop6h 05mUnited Airlines
lun. 12/17:13 pmSEA - CPR
1 stop23h 14mUnited Airlines
Deal found 8/17$412
This United Airlines deal was found by Cheapflights users on 8/17. 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.
lun. 9/15:50 pmCPR - SEA
1 stop6h 09mUnited Airlines
ven. 9/57:00 pmSEA - CPR
1 stop13h 40mUnited Airlines
Deal found 8/17$452
This United Airlines deal was found by Cheapflights users on 8/17. 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.
sam. 12/2711:00 amCPR - SEA
2 stops14h 59mUnited Airlines
mer. 12/315:02 amSEA - CPR
1 stop4h 49mUnited Airlines
Deal found 8/17$476

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 août 18, 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

mar. 9/9

7:05 am-3:52 pm

1 stop9h 47m

Seattle/Tacoma Intl

lun. 9/29

6:35 am-8:17 pm

2 stops12h 42m

$344

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

sam. 12/27

6:10 pm-10:59 pm

1 stop5h 49m

Seattle/Tacoma Intl

mer. 12/31

5:02 am-10:51 am

1 stop4h 49m

$394

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

dim. 9/7

5:50 pm-10:59 pm

1 stop6h 09m

Seattle/Tacoma Intl

dim. 9/14

5:02 am-10:50 am

1 stop4h 48m

$394

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

sam. 8/30

9:10 am-5:58 pm

1 stop9h 48m

Seattle/Tacoma Intl

mer. 9/3

11:11 am-7:09 pm

1 stop6h 58m

$399

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

dim. 11/23

6:05 pm-11:10 pm

1 stop6h 05m

Seattle/Tacoma Intl

lun. 12/1

7:13 pm-7:27 pm

1 stop23h 14m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

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, January is the cheapest month in which you can book a flight from Casper to Seattle (average of $238). Flying from Casper to Seattle in June is currently the most expensive (average of $389). 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 août 18, 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
8,925 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,925 reviews
United Airlines
7.4
Good
8,925 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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.

  • 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 $308. You may be able to fly from Casper to Seattle for 34% 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, January is the cheapest month in which you can book a flight from Casper to Seattle (average of $238). Flying from Casper to Seattle in June is currently the most expensive (average of $389). 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
SeaTac
Tukwila
Tacoma
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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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 août 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$278Average$469FlexibilityNo cancel feeOn-time69%

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