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Cheap flights from Seattle to Casper from $273

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Casper departing on 4/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Seattle to Casper

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:00 am - 10:47 am
SEA
-
CPR
4h 47m
1 stop
United Airlines Logo
5:25 am - 9:46 am
CPR
-
SEA
5h 21m
1 stop
$335United Airlines
Fri, Apr 10 - Sat, Apr 18
United Airlines Logo
12:51 pm - 8:17 pm
SEA
-
CPR
6h 26m
1 stop
United Airlines Logo
5:25 am - 9:40 am
CPR
-
SEA
5h 15m
1 stop
$374United Airlines
Thu, Apr 30 - Sun, May 3
United Airlines Logo
8:51 am - 6:59 pm
SEA
-
CPR
9h 08m
1 stop
United Airlines Logo
5:25 am - 9:46 am
CPR
-
SEA
5h 21m
1 stop
$388United Airlines
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
5:00 am - 10:47 am
SEA
-
CPR
4h 47m
1 stop
United Airlines Logo
11:22 am - 7:45 pm
CPR
-
SEA
9h 23m
2 stops
$394United Airlines
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
8:51 am - 6:59 pm
SEA
-
CPR
9h 08m
1 stop
United Airlines Logo
5:55 pm - 10:56 pm
CPR
-
SEA
6h 01m
1 stop
$398United Airlines
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
11:35 am - 8:26 pm
SEA
-
CPR
7h 51m
2 stops
United Airlines Logo
11:22 am - 9:46 pm
CPR
-
SEA
11h 24m
2 stops
$399United Airlines
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
8:45 am - 8:26 pm
SEA
-
CPR
10h 41m
2 stops
United Airlines Logo
5:55 pm - 10:56 pm
CPR
-
SEA
6h 01m
1 stop
$404United Airlines
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
8:42 am - 8:26 pm
SEA
-
CPR
10h 44m
2 stops
United Airlines Logo
7:05 am - 4:04 pm
CPR
-
SEA
9h 59m
2 stops
$409United Airlines
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
2:36 pm - 8:33 pm
SEA
-
CPR
4h 57m
1 stop
United Airlines Logo
9:26 am - 5:59 pm
CPR
-
SEA
9h 33m
1 stop
$423United Airlines
Thu, Jun 4 - Mon, Jun 8
United Airlines Logo
5:00 am - 2:39 pm
SEA
-
CPR
8h 39m
1 stop
United Airlines Logo
1:21 pm - 9:06 pm
CPR
-
SEA
8h 45m
1 stop
$428United Airlines
Thu, Apr 2 - Tue, Apr 7

United Airlines flights from Seattle to Casper

Our best United Airlines deals on Seattle to Casper flight tickets
United Airlines
Apr 10
SEA5:00 amSeattle/Tacoma Intl
4h 47m
1 stop
CPR10:47 amCasper Natrona County
Apr 18
CPR5:25 amCasper Natrona County
5h 21m
1 stop
SEA9:46 amSeattle/Tacoma Intl
$335
United Airlines
Apr 30
SEA12:51 pmSeattle/Tacoma Intl
6h 26m
1 stop
CPR8:17 pmCasper Natrona County
May 3
CPR5:25 amCasper Natrona County
5h 15m
1 stop
SEA9:40 amSeattle/Tacoma Intl
$374
United Airlines
Apr 18
SEA8:51 amSeattle/Tacoma Intl
9h 08m
1 stop
CPR6:59 pmCasper Natrona County
Apr 22
CPR5:55 pmCasper Natrona County
6h 01m
1 stop
SEA10:56 pmSeattle/Tacoma Intl
$398

momondo 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, momondo users made 832,500 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Seattle to Casper that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Fri 4/10

5:00 am-10:47 am

1 stop4h 47m

Casper Natrona County

Sat 4/18

5:25 am-9:46 am

1 stop5h 21m

$335

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 4/30

12:51 pm-8:17 pm

1 stop6h 26m

Casper Natrona County

Sun 5/3

5:25 am-9:40 am

1 stop5h 15m

$374

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 4/18

8:51 am-6:59 pm

1 stop9h 08m

Casper Natrona County

Wed 4/22

5:25 am-9:46 am

1 stop5h 21m

$388

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 4/18

5:00 am-10:47 am

1 stop4h 47m

Casper Natrona County

Wed 4/22

11:22 am-7:45 pm

2 stops9h 23m

$394

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 4/18

8:51 am-6:59 pm

1 stop9h 08m

Casper Natrona County

Wed 4/22

5:55 pm-10:56 pm

1 stop6h 01m

$398

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 4/18

11:35 am-8:26 pm

2 stops7h 51m

Casper Natrona County

Wed 4/22

11:22 am-9:46 pm

2 stops11h 24m

$399

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 4/18

8:45 am-8:26 pm

2 stops10h 41m

Casper Natrona County

Wed 4/22

5:55 pm-10:56 pm

1 stop6h 01m

$404

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sat 4/18

8:42 am-8:26 pm

2 stops10h 44m

Casper Natrona County

Wed 4/22

7:05 am-4:04 pm

2 stops9h 59m

$409

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 6/4

2:36 pm-8:33 pm

1 stop4h 57m

Casper Natrona County

Mon 6/8

9:26 am-5:59 pm

1 stop9h 33m

$423

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 4/2

5:00 am-2:39 pm

1 stop8h 39m

Casper Natrona County

Tue 4/7

1:21 pm-9:06 pm

1 stop8h 45m

$428

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Seattle to Casper

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Casper?

What is the cheapest month to fly to Casper?

In general, September is the cheapest month to fly from Seattle to Casper. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $324. If you aren’t able to travel during the month of September, then book flights to Casper from Seattle during January instead. Flights to Casper in January, while not as cheap as those in September, still average around $343.

When to book flights from Seattle to Casper

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Casper according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Casper (SEA to CPR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Casper

Fastest flight time

4h 46m

Direct flights

None
The fastest flight from Seattle to Casper takes 4h 46m
There are no direct flights from Seattle to Casper. There are no popular flight routes from Seattle to Casper.
Search flight deals

  • How far is Seattle/Tacoma Intl to Casper Natrona County by plane?

    Casper Natrona County is 843.3 mi away from Seattle/Tacoma Intl. Flights usually cover this in 4h 46m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Casper Natrona County Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Casper Natrona County Airport refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Casper Natrona County Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Casper Natrona County Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Casper Natrona County Airport.

  • What documentation or ID do you need to fly to Casper Natrona County Airport?

    The necessary travel and health documents for your Casper Natrona County Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Casper?

Best airlines flying from Seattle to Casper

Compare and see reviews for airlines that fly from Seattle to Casper with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $238Free CancellationRating
7.4
9,462 reviews
Search United Airlines flights

Traveling to a place near Casper?

Book flights to Casper if you plan to visit one of these locations
Rawlins
Evansville
Douglas

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Casper?

It is quick and easy to find Seattle to Casper flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Casper that suits you.

Can I find flights from Seattle to Casper with flexible booking policies on momondo?

Flights from Seattle to Casper with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Casper?

Once you have performed a search for Seattle to Casper flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Seattle to Casper right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Casper now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Casper and let you know when they change.

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