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Cheap flights from Seattle to Casper from $263

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 8/24. 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
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
3:40 pm - 10:10 pm
SEA
-
CPR
5h 30m
1 stop
United Airlines Logo
9:26 am - 10:08 pm
CPR
-
SEA
13h 42m
2 stops
$414United Airlines
Tue, May 19 - Sat, May 23
United Airlines Logo
8:38 am - 10:10 pm
SEA
-
CPR
12h 32m
2 stops
United Airlines Logo
9:26 am - 10:08 pm
CPR
-
SEA
13h 42m
2 stops
$419United Airlines
Tue, May 19 - Sat, May 23
United Airlines Logo
12:51 pm - 10:10 pm
SEA
-
CPR
8h 19m
1 stop
United Airlines Logo
8:45 am - 5:59 pm
CPR
-
SEA
10h 14m
1 stop
$438United Airlines
Tue, May 19 - Sat, May 23
United Airlines Logo
11:02 am - 9:59 pm
SEA
-
CPR
9h 57m
1 stop
United Airlines Logo
7:05 am - 7:03 pm
CPR
-
SEA
12h 58m
2 stops
$444United Airlines
Thu, Jul 23 - Wed, Jul 29
United Airlines Logo
6:00 am - 9:59 pm
SEA
-
CPR
14h 59m
2 stops
United Airlines Logo
7:05 am - 7:03 pm
CPR
-
SEA
12h 58m
2 stops
$449United Airlines
Thu, Jul 23 - Wed, Jul 29
United Airlines Logo
5:07 am - 12:42 pm
SEA
-
CPR
6h 35m
1 stop
United Airlines Logo
6:13 pm - 11:10 pm
CPR
-
SEA
5h 57m
1 stop
$453United Airlines
Thu, Jun 4 - Mon, Jun 8
United Airlines Logo
11:02 am - 8:33 pm
SEA
-
CPR
8h 31m
1 stop
United Airlines Logo
9:26 am - 5:59 pm
CPR
-
SEA
9h 33m
1 stop
$468United Airlines
Wed, Jul 29 - Sat, Aug 1
United Airlines Logo
11:02 am - 9:59 pm
SEA
-
CPR
9h 57m
1 stop
United Airlines Logo
9:26 am - 1:13 am
CPR
-
SEA
16h 47m
2 stops
$474United Airlines
Wed, Jul 29 - Sat, Aug 1
United Airlines Logo
6:00 am - 9:59 pm
SEA
-
CPR
14h 59m
2 stops
United Airlines Logo
9:26 am - 1:13 am
CPR
-
SEA
16h 47m
2 stops
$479United Airlines
Mon, Jul 27 - Sat, Aug 1
United Airlines Logo
5:07 am - 10:46 am
SEA
-
CPR
4h 39m
1 stop
United Airlines Logo
7:05 am - 3:55 pm
CPR
-
SEA
9h 50m
1 stop
$484United Airlines
Wed, Jun 3 - Sun, Jun 7

United Airlines flights from Seattle to Casper

Our best United Airlines deals on Seattle to Casper flight tickets
United Airlines
May 19
SEA3:40 pmSeattle/Tacoma Intl
5h 30m
1 stop
CPR10:10 pmCasper Natrona County
May 23
CPR9:26 amCasper Natrona County
13h 42m
2 stops
SEA10:08 pmSeattle/Tacoma Intl
$414
United Airlines
May 19
SEA8:38 amSeattle/Tacoma Intl
12h 32m
2 stops
CPR10:10 pmCasper Natrona County
May 23
CPR9:26 amCasper Natrona County
13h 42m
2 stops
SEA10:08 pmSeattle/Tacoma Intl
$419
United Airlines
May 19
SEA12:51 pmSeattle/Tacoma Intl
8h 19m
1 stop
CPR10:10 pmCasper Natrona County
May 23
CPR8:45 amCasper Natrona County
10h 14m
1 stop
SEA5:59 pmSeattle/Tacoma Intl
$438

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 May 7, 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

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 5/19

3:40 pm-10:10 pm

1 stop5h 30m

Casper Natrona County

Sat 5/23

9:26 am-10:08 pm

2 stops13h 42m

$414

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 5/19

8:38 am-10:10 pm

2 stops12h 32m

Casper Natrona County

Sat 5/23

9:26 am-10:08 pm

2 stops13h 42m

$419

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 5/19

12:51 pm-10:10 pm

1 stop8h 19m

Casper Natrona County

Sat 5/23

8:45 am-5:59 pm

1 stop10h 14m

$438

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 7/23

11:02 am-9:59 pm

1 stop9h 57m

Casper Natrona County

Wed 7/29

7:05 am-7:03 pm

2 stops12h 58m

$444

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 7/23

6:00 am-9:59 pm

2 stops14h 59m

Casper Natrona County

Wed 7/29

7:05 am-7:03 pm

2 stops12h 58m

$449
Quickest round-trip

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 6/4

5:07 am-12:42 pm

1 stop6h 35m

Casper Natrona County

Mon 6/8

6:13 pm-11:10 pm

1 stop5h 57m

$453

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 7/29

11:02 am-8:33 pm

1 stop8h 31m

Casper Natrona County

Sat 8/1

9:26 am-5:59 pm

1 stop9h 33m

$468

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 7/29

11:02 am-9:59 pm

1 stop9h 57m

Casper Natrona County

Sat 8/1

9:26 am-1:13 am

2 stops16h 47m

$474

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Mon 7/27

6:00 am-9:59 pm

2 stops14h 59m

Casper Natrona County

Sat 8/1

9:26 am-1:13 am

2 stops16h 47m

$479

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 6/3

5:07 am-10:46 am

1 stop4h 39m

Casper Natrona County

Sun 6/7

7:05 am-3:55 pm

1 stop9h 50m

$484

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Casper from

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 39m

Direct flights

None
The fastest flight from Seattle to Casper takes 4h 39m
There are no direct flights from Seattle to Casper. There are no popular flight routes from Seattle to Casper.
Search flight deals

Frequently asked questions about flying from Seattle to Casper

  • 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 39m, 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
9,690 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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