Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Casper from $308

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Casper departing on 12/5. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Casper

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:07 am - 10:53 amSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
4h 46m1 stop Denver Intl
United Airlines Logo
11:25 am - 6:09 pmCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
7h 44m1 stop Denver Intl
$308United Airlines
Sat, Dec 5 - Sat, Dec 12
United Airlines Logo
3:54 pm - 9:59 pmSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
5h 05m1 stop Denver Intl
United Airlines Logo
4:15 pm - 9:31 pmCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
6h 16m1 stop Denver Intl
$308United Airlines
Thu, Sep 3 - Tue, Sep 8
United Airlines Logo
3:54 pm - 9:59 pmSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
5h 05m1 stop Denver Intl
United Airlines Logo
4:15 pm - 9:31 pmCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
6h 16m1 stop Denver Intl
$308United Airlines
Sat, Sep 5 - Sat, Sep 12
United Airlines Logo
3:54 pm - 9:59 pmSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
5h 05m1 stop Denver Intl
United Airlines Logo
8:45 am - 4:14 pmCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
8h 29m2 stops Denver Intl San Francisco
$314United Airlines
Sat, Sep 5 - Sat, Sep 12
United Airlines Logo
5:07 am - 10:53 amSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
4h 46m1 stop Denver Intl
United Airlines Logo
1:25 pm - 8:48 pmCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
8h 23m2 stops Denver Intl San Francisco
$314United Airlines
Sat, Dec 5 - Sat, Dec 12
United Airlines Logo
1:16 pm - 9:59 pmSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
7h 43m2 stops San Francisco Denver Intl
United Airlines Logo
8:45 am - 4:14 pmCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
8h 29m2 stops Denver Intl San Francisco
$319United Airlines
Sat, Sep 5 - Sat, Sep 12
United Airlines Logo
5:00 am - 10:48 amSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
4h 48m1 stop Denver Intl
United Airlines Logo
10:06 am - 4:03 pmCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
6h 57m1 stop Denver Intl
$333United Airlines
Thu, Oct 1 - Sun, Oct 4
United Airlines Logo
8:30 am - 6:37 pmSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
9h 07m1 stop Denver Intl
United Airlines Logo
5:30 am - 9:59 amCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
5h 29m1 stop Denver Intl
$388United Airlines
Sat, Dec 5 - Tue, Dec 8
United Airlines Logo
5:05 am - 10:49 amSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
4h 44m1 stop Denver Intl
United Airlines Logo
1:29 pm - 9:19 pmCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
8h 50m1 stop Denver Intl
$388United Airlines
Fri, Nov 6 - Mon, Nov 9
United Airlines Logo
5:00 am - 12:45 pmSEA  Seattle/Tacoma Intl-CPR Casper Natrona County
6h 45m1 stop Denver Intl
United Airlines Logo
7:05 am - 11:44 amCPR  Casper Natrona County-SEA Seattle/Tacoma Intl
5h 39m1 stop Denver Intl
$388United Airlines
Tue, Sep 1 - Mon, Sep 7

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

United Airlines flights from Seattle to Casper

Our best United Airlines deals on Seattle to Casper flight tickets
United Airlines
Sep 3
SEA3:54 pmSeattle/Tacoma Intl
5h 05m
1 stop
CPR9:59 pmCasper Natrona County
Sep 8
CPR4:15 pmCasper Natrona County
6h 16m
1 stop
SEA9:31 pmSeattle/Tacoma Intl
$308
United Airlines
Sep 5
SEA3:54 pmSeattle/Tacoma Intl
5h 05m
1 stop
CPR9:59 pmCasper Natrona County
Sep 12
CPR8:45 amCasper Natrona County
8h 29m
2 stops
SEA4:14 pmSeattle/Tacoma Intl
$314
United Airlines
Sep 5
SEA1:16 pmSeattle/Tacoma Intl
7h 43m
2 stops
CPR9:59 pmCasper Natrona County
Sep 12
CPR8:45 amCasper Natrona County
8h 29m
2 stops
SEA4:14 pmSeattle/Tacoma Intl
$319

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 August 9, 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 Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Sat 12/5

5:07 am-10:53 am

1 stop4h 46m

Casper Natrona County

Sat 12/12

11:25 am-6:09 pm

1 stop7h 44m

$308
Quickest round-trip

SeattleCasper

SEA Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Thu 9/3

3:54 pm-9:59 pm

1 stop5h 05m

Casper Natrona County

Tue 9/8

4:15 pm-9:31 pm

1 stop6h 16m

$308

SeattleCasper

SEA Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Sat 9/5

3:54 pm-9:59 pm

1 stop5h 05m

Casper Natrona County

Sat 9/12

4:15 pm-9:31 pm

1 stop6h 16m

$308

SeattleCasper

SEA Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Sat 9/5

3:54 pm-9:59 pm

1 stop5h 05m

Casper Natrona County

Sat 9/12

8:45 am-4:14 pm

2 stops8h 29m

$314

SeattleCasper

SEA Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Sat 12/5

5:07 am-10:53 am

1 stop4h 46m

Casper Natrona County

Sat 12/12

1:25 pm-8:48 pm

2 stops8h 23m

$314

SeattleCasper

SEA Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Sat 9/5

1:16 pm-9:59 pm

2 stops7h 43m

Casper Natrona County

Sat 9/12

8:45 am-4:14 pm

2 stops8h 29m

$319

SeattleCasper

SEA Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Thu 10/1

5:00 am-10:48 am

1 stop4h 48m

Casper Natrona County

Sun 10/4

10:06 am-4:03 pm

1 stop6h 57m

$333

SeattleCasper

SEA Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Sat 12/5

8:30 am-6:37 pm

1 stop9h 07m

Casper Natrona County

Tue 12/8

5:30 am-9:59 am

1 stop5h 29m

$388

SeattleCasper

SEA Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Fri 11/6

5:05 am-10:49 am

1 stop4h 44m

Casper Natrona County

Mon 11/9

1:29 pm-9:19 pm

1 stop8h 50m

$388

SeattleCasper

SEA Seattle/Tacoma Intl - CPR Casper Natrona County

SEACPR

Seattle/Tacoma Intl

Tue 9/1

5:00 am-12:45 pm

1 stop6h 45m

Casper Natrona County

Mon 9/7

7:05 am-11:44 am

1 stop5h 39m

$388

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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?

Prices are currently low for flights on this route.

Typical prices usually range from $439 to $577.
The lowest price recently found on this route was $308.

What is the cheapest month to fly to Casper?

In general, January 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 $343. If you aren’t able to travel during the month of January, then book flights to Casper from Seattle during October instead. Flights to Casper in October, while not as cheap as those in January, still average around $393.

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 44m

Direct flights

None
The fastest flight from Seattle to Casper takes 4h 44m
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 44m, 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
10,089 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
Douglas
Evansville

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.

An easier way to manage your Casper trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 9/8
Tue 9/15
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States