What is the cheapest airline that flies from Seattle/Tacoma Intl to Casper Natrona County?

United Airlines is the most popular carrier operating from Seattle/Tacoma Intl to Casper Natrona County

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?

There is 1 operator available for flights from Seattle/Tacoma Intl Airport to Casper Natrona County Airport as of January 2026.

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.

$258 Cheap Flights from Seattle to Casper in 2026

1 adult

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Find the cheapest flights from Seattle to Casper

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:00 am - 12:40 pm

SEA

CPR

6h 40m

1 stop

1:20 pm - 6:03 pm

CPR

SEA

5h 43m

1 stop

$258United Airlines

Wed, Feb 25 - Wed, Mar 4

9:00 am - 2:40 pm

SEA

CPR

4h 40m

1 stop

1:20 pm - 10:13 pm

CPR

SEA

9h 53m

2 stops

$264United Airlines

Wed, Feb 25 - Wed, Mar 4

5:00 am - 10:51 am

SEA

CPR

4h 51m

1 stop

5:55 pm - 10:56 pm

CPR

SEA

6h 01m

1 stop

$328United Airlines

Thu, Mar 26 - Sun, Mar 29

5:00 am - 12:35 pm

SEA

CPR

6h 35m

1 stop

1:20 pm - 9:12 pm

CPR

SEA

8h 52m

1 stop

$338United Airlines

Tue, Feb 10 - Sat, Feb 14

9:00 am - 7:06 pm

SEA

CPR

9h 06m

2 stops

5:25 am - 9:49 am

CPR

SEA

5h 24m

1 stop

$344United Airlines

Tue, Feb 10 - Sat, Feb 14

12:35 pm - 10:14 pm

SEA

CPR

8h 39m

2 stops

7:10 am - 7:33 pm

CPR

SEA

13h 23m

2 stops

$349United Airlines

Tue, Feb 10 - Sat, Feb 14

12:25 pm - 8:40 pm

SEA

CPR

7h 15m

1 stop

1:20 pm - 9:12 pm

CPR

SEA

8h 52m

1 stop

$368United Airlines

Tue, Feb 10 - Sat, Feb 14

3:30 pm - 10:14 pm

SEA

CPR

5h 44m

1 stop

7:10 am - 7:33 pm

CPR

SEA

13h 23m

2 stops

$374United Airlines

Tue, Feb 10 - Sat, Feb 14

5:00 am - 10:51 am

SEA

CPR

4h 51m

1 stop

5:55 pm - 10:56 pm

CPR

SEA

6h 01m

1 stop

$427United Airlines

Thu, Mar 26 - Sun, Mar 29

5:00 am - 2:40 pm

SEA

CPR

8h 40m

1 stop

5:55 pm - 10:56 pm

CPR

SEA

6h 01m

1 stop

$442United Airlines

Sun, Mar 22 - Sun, Mar 29

United Airlines flights from Seattle to Casper

Our best United Airlines deals on Seattle to Casper flight tickets

United Airlines

Feb 25

SEA5:00 amSeattle/Tacoma Intl

6h 40m

1 stop

CPR12:40 pmCasper Natrona County

Mar 4

CPR1:20 pmCasper Natrona County

5h 43m

1 stop

SEA6:03 pmSeattle/Tacoma Intl

$258

United Airlines

Feb 25

SEA9:00 amSeattle/Tacoma Intl

4h 40m

1 stop

CPR2:40 pmCasper Natrona County

Mar 4

CPR1:20 pmCasper Natrona County

9h 53m

2 stops

SEA10:13 pmSeattle/Tacoma Intl

$264

United Airlines

Feb 2

SEA5:00 amSeattle/Tacoma Intl

4h 53m

1 stop

CPR10:53 amCasper Natrona County

Feb 12

CPR6:08 pmCasper Natrona County

5h 51m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

$298

Fly from

Fly to

Route

Depart

Return

Price

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 2/25

5:00 am-12:40 pm

1 stop6h 40m

Casper Natrona County

Wed 3/4

1:20 pm-6:03 pm

1 stop5h 43m

$258

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Wed 2/25

9:00 am-2:40 pm

1 stop4h 40m

Casper Natrona County

Wed 3/4

1:20 pm-10:13 pm

2 stops9h 53m

$264

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 3/26

5:00 am-10:51 am

1 stop4h 51m

Casper Natrona County

Sun 3/29

5:55 pm-10:56 pm

1 stop6h 01m

$328

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 2/10

5:00 am-12:35 pm

1 stop6h 35m

Casper Natrona County

Sat 2/14

1:20 pm-9:12 pm

1 stop8h 52m

$338

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 2/10

9:00 am-7:06 pm

2 stops9h 06m

Casper Natrona County

Sat 2/14

5:25 am-9:49 am

1 stop5h 24m

$344

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 2/10

12:35 pm-10:14 pm

2 stops8h 39m

Casper Natrona County

Sat 2/14

7:10 am-7:33 pm

2 stops13h 23m

$349

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 2/10

12:25 pm-8:40 pm

1 stop7h 15m

Casper Natrona County

Sat 2/14

1:20 pm-9:12 pm

1 stop8h 52m

$368

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Tue 2/10

3:30 pm-10:14 pm

1 stop5h 44m

Casper Natrona County

Sat 2/14

7:10 am-7:33 pm

2 stops13h 23m

$374

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Thu 3/26

5:00 am-10:51 am

1 stop4h 51m

Casper Natrona County

Sun 3/29

5:55 pm-10:56 pm

1 stop6h 01m

$427

SeattleCasper

SEA - CPR

SEACPR

Seattle/Tacoma Intl

Sun 3/22

5:00 am-2:40 pm

1 stop8h 40m

Casper Natrona County

Sun 3/29

5:55 pm-10:56 pm

1 stop6h 01m

$442

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first

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

Prices

Airlines

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 March instead. Flights to Casper in March, while not as cheap as those in September, still average around $328.

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 51m
Direct flights	None

The fastest flight from Seattle to Casper takes 4h 51m

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 51m, 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?
There is 1 operator available for flights from Seattle/Tacoma Intl Airport to Casper Natrona County Airport as of January 2026.
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?
momondo data reveals that the most frequently booked airline on the route from Seattle to Casper is United Airlines, representing 100% of all bookings.

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 Airlines	PriceFrom $238	Free Cancellation	Rating 7.4 9,215 reviews		Search United Airlines flights

Rawlins

Evansville

Douglas

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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.