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$238+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — SEA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$238
(United Airlines)

Popular in

October

Cheapest in

February

Average price

$498
From Casper Natrona County to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 15% potential increase in price ($85 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 16, 2025.

This United Airlines deal was found by Cheapflights users on 9/16. 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.
Tue 11/183:18 pmCPR - SEA
1 stop7h 15mUnited Airlines
Tue 12/95:05 amSEA - CPR
1 stop4h 41mUnited Airlines
Deal found 9/16$238
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/256:00 pmCPR - SEA
1 stop6h 29mUnited Airlines
Mon 9/295:00 amSEA - CPR
1 stop4h 47mUnited Airlines
Deal found 9/15$273
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 11/195:30 amCPR - SEA
1 stop6h 05mUnited Airlines
Tue 12/95:05 amSEA - CPR
1 stop4h 41mUnited Airlines
Deal found 9/16$308
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 11/191:25 pmCPR - SEA
1 stop8h 48mUnited Airlines
Thu 12/49:05 amSEA - CPR
2 stops12h 10mUnited Airlines
Deal found 9/16$314
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/1411:22 amCPR - SEA
1 stop7h 31mUnited Airlines
Tue 10/215:00 amSEA - CPR
1 stop4h 47mUnited Airlines
Deal found 9/14$318
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 11/1911:20 amCPR - SEA
2 stops12h 55mUnited Airlines
Sat 12/67:00 amSEA - CPR
2 stops14h 15mUnited Airlines
Deal found 9/16$319
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 11/219:03 amCPR - SEA
1 stop10h 07mUnited Airlines
Fri 12/55:05 amSEA - CPR
1 stop4h 41mUnited Airlines
Deal found 9/16$338
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 11/219:03 amCPR - SEA
1 stop10h 07mUnited Airlines
Wed 12/101:05 pmSEA - CPR
2 stops8h 10mUnited Airlines
Deal found 9/16$344
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Thu 11/207:00 amCPR - SEA
3 stops14h 51mUnited Airlines
Fri 12/55:05 amSEA - CPR
1 stop4h 41mUnited Airlines
Deal found 9/16$349

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 September 16, 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 11/18

1:25 pm-10:30 pm

2 stops10h 05m

Seattle/Tacoma Intl

Tue 12/9

5:05 am-10:46 am

1 stop4h 41m

$244

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sat 2/28

8:55 am-6:10 pm

1 stop10h 15m

Seattle/Tacoma Intl

Tue 3/3

5:07 am-12:35 pm

1 stop6h 28m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sun 11/23

6:05 pm-11:10 pm

1 stop6h 05m

Seattle/Tacoma Intl

Tue 12/9

5:05 am-10:46 am

1 stop4h 41m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Tue 11/25

6:05 pm-11:10 pm

1 stop6h 05m

Seattle/Tacoma Intl

Tue 12/9

5:05 am-10:46 am

1 stop4h 41m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Mon 11/24

5:30 am-10:35 am

1 stop6h 05m

Seattle/Tacoma Intl

Sat 12/6

3:40 pm-10:15 pm

1 stop5h 35m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sun 11/16

3:18 pm-11:10 pm

1 stop8h 52m

Seattle/Tacoma Intl

Wed 12/10

5:05 am-10:46 am

1 stop4h 41m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Mon 11/24

5:30 am-10:35 am

1 stop6h 05m

Seattle/Tacoma Intl

Thu 12/4

3:40 pm-10:15 pm

1 stop5h 35m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 11/19

6:05 pm-11:10 pm

1 stop6h 05m

Seattle/Tacoma Intl

Thu 12/11

5:05 am-2:38 pm

1 stop8h 33m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sun 11/23

6:05 pm-11:10 pm

1 stop6h 05m

Seattle/Tacoma Intl

Fri 12/5

5:05 am-2:38 pm

1 stop8h 33m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Thu 11/20

6:05 pm-11:10 pm

1 stop6h 05m

Seattle/Tacoma Intl

Tue 12/9

5:05 am-10:46 am

1 stop4h 41m

$308

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 12 results
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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 $387). 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 September 16, 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
8,924 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

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
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

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.

  • How long is the flight from Casper to Seattle?

    There are many flights that can get you from Casper to Seattle in 10h 05m. 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 45% 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 $387). 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
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

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Alternative routes for Casper to Seattle

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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$256Average$452FlexibilityNo cancel feeOn-time69%

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