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

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

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

Prices for flights from Casper Natrona County Airport to Seattle/Tacoma Intl Airport were last updated today.

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

As of June 2026, there is 1 operator available to choose from for flights from Casper Natrona County Airport to Seattle/Tacoma Intl Airport.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Casper Natrona County Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$318 Cheap Flights from Casper to Seattle in 2026

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

Prices are currently low for flights on this route. Typical prices usually range from $577 to $441. The lowest price recently found on this route was $318.

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Find the cheapest flights from Casper to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:01 pm - 10:59 pm

CPR

SEA

5h 58m

1 stop

5:07 am - 10:53 am

SEA

CPR

4h 46m

1 stop

$318United Airlines

Thu, Oct 29 - Mon, Nov 2

6:05 pm - 11:04 pm

CPR

SEA

5h 59m

1 stop

5:00 am - 12:45 pm

SEA

CPR

6h 45m

1 stop

$345United Airlines

Fri, Sep 18 - Sun, Sep 27

1:25 pm - 9:56 pm

CPR

SEA

9h 31m

2 stops

5:07 am - 10:53 am

SEA

CPR

4h 46m

1 stop

$354United Airlines

Thu, Oct 29 - Mon, Nov 2

9:26 am - 3:55 pm

CPR

SEA

7h 29m

1 stop

5:07 am - 12:42 pm

SEA

CPR

6h 35m

1 stop

$383United Airlines

Tue, Jun 16 - Sat, Jun 20

1:25 pm - 6:09 pm

CPR

SEA

5h 44m

1 stop

5:07 am - 10:53 am

SEA

CPR

4h 46m

1 stop

$388United Airlines

Sat, Nov 7 - Sun, Nov 15

1:25 pm - 12:33 am

CPR

SEA

12h 08m

2 stops

5:07 am - 12:35 pm

SEA

CPR

6h 28m

1 stop

$394United Airlines

Sat, Nov 7 - Sun, Nov 15

6:01 pm - 10:59 pm

CPR

SEA

5h 58m

1 stop

5:07 am - 10:53 am

SEA

CPR

4h 46m

1 stop

$398United Airlines

Sat, Nov 7 - Sun, Nov 15

9:26 am - 1:29 am

CPR

SEA

17h 03m

2 stops

6:00 am - 8:26 pm

SEA

CPR

13h 26m

2 stops

$399United Airlines

Wed, Jul 22 - Sat, Jul 25

1:25 pm - 9:56 pm

CPR

SEA

9h 31m

2 stops

5:07 am - 10:53 am

SEA

CPR

4h 46m

1 stop

$404United Airlines

Sat, Nov 7 - Sun, Nov 15

9:26 am - 1:29 am

CPR

SEA

17h 03m

2 stops

6:00 am - 8:26 pm

SEA

CPR

13h 26m

2 stops

$409United Airlines

Wed, Jul 22 - Sat, Jul 25

United Airlines flights from Casper to Seattle

Our best United Airlines deals on Casper to Seattle flight tickets

United Airlines

Oct 29

CPR6:01 pmCasper Natrona County

5h 58m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Nov 2

SEA5:07 amSeattle/Tacoma Intl

4h 46m

1 stop

CPR10:53 amCasper Natrona County

$318

United Airlines

Sep 18

CPR6:05 pmCasper Natrona County

5h 59m

1 stop

SEA11:04 pmSeattle/Tacoma Intl

Sep 27

SEA5:00 amSeattle/Tacoma Intl

6h 45m

1 stop

CPR12:45 pmCasper Natrona County

$345

United Airlines

Oct 29

CPR1:25 pmCasper Natrona County

9h 31m

2 stops

SEA9:56 pmSeattle/Tacoma Intl

Nov 2

SEA5:07 amSeattle/Tacoma Intl

4h 46m

1 stop

CPR10:53 amCasper Natrona County

$354

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Thu 10/29

6:01 pm-10:59 pm

1 stop5h 58m

Seattle/Tacoma Intl

Mon 11/2

5:07 am-10:53 am

1 stop4h 46m

$318

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Fri 9/18

6:05 pm-11:04 pm

1 stop5h 59m

Seattle/Tacoma Intl

Sun 9/27

5:00 am-12:45 pm

1 stop6h 45m

$345

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Thu 10/29

1:25 pm-9:56 pm

2 stops9h 31m

Seattle/Tacoma Intl

Mon 11/2

5:07 am-10:53 am

1 stop4h 46m

$354

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Tue 6/16

9:26 am-3:55 pm

1 stop7h 29m

Seattle/Tacoma Intl

Sat 6/20

5:07 am-12:42 pm

1 stop6h 35m

$383

Quickest round-trip

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sat 11/7

1:25 pm-6:09 pm

1 stop5h 44m

Seattle/Tacoma Intl

Sun 11/15

5:07 am-10:53 am

1 stop4h 46m

$388

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sat 11/7

1:25 pm-12:33 am

2 stops12h 08m

Seattle/Tacoma Intl

Sun 11/15

5:07 am-12:35 pm

1 stop6h 28m

$394

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sat 11/7

6:01 pm-10:59 pm

1 stop5h 58m

Seattle/Tacoma Intl

Sun 11/15

5:07 am-10:53 am

1 stop4h 46m

$398

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 7/22

9:26 am-1:29 am

2 stops17h 03m

Seattle/Tacoma Intl

Sat 7/25

6:00 am-8:26 pm

2 stops13h 26m

$399

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sat 11/7

1:25 pm-9:56 pm

2 stops9h 31m

Seattle/Tacoma Intl

Sun 11/15

5:07 am-10:53 am

1 stop4h 46m

$404

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 7/22

9:26 am-1:29 am

2 stops17h 03m

Seattle/Tacoma Intl

Sat 7/25

6:00 am-8:26 pm

2 stops13h 26m

$409

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Casper to Seattle

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

What is the cheapest month to fly to Seattle?

In general, January is the cheapest month to fly from Casper to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you don’t want to visit Seattle in January, then you should wait until May to fly from Casper, when ticket prices are also cheap, with an average price of $238.

When to book flights from Casper to Seattle

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

Estimated round-trip price

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

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

Fastest flight time	5h 45m
Direct flights	None

The fastest flight from Casper to Seattle takes 5h 45m

There are no direct flights from Casper to Seattle. There are no popular flight routes from Casper to Seattle.

Search flight deals

Frequently asked questions about flying from Casper to Seattle

How far is Casper Natrona County to Seattle/Tacoma Intl by plane?
Casper Natrona County and Seattle/Tacoma Intl are 843.3 mi apart from one another. Flights usually cover this in 5h 45m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Casper Natrona County Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Casper Natrona County Airport to Seattle/Tacoma Intl Airport were last updated today.
How many operators does momondo search for flights from Casper Natrona County Airport to Seattle/Tacoma Intl Airport?
As of June 2026, there is 1 operator available to choose from for flights from Casper Natrona County Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Casper Natrona County Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Casper Natrona County Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Casper to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Casper to Seattle is United Airlines (100% of total bookings).

Best airlines flying from Casper to Seattle

Compare and see reviews for airlines that fly from Casper to Seattle with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $238	Free Cancellation	Rating 7.4 9,777 reviews		Search United Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Redmond

Kent

Lakewood

Tukwila

Puyallup

Marysville

Cle Elum

Federal Way

Fife

Centralia

Shoreline

Westport

Tumwater

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Casper.

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

Flights from Casper to Seattle 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 Casper to Seattle?

momondo helps you find the best flight between Casper and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Seattle from Casper. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.