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 September 2025, 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.

$238 Cheap Flights from Casper to Seattle in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

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

Trusted and free

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

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Casper to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

3:18 pm - 9:33 pmCPR-SEA

7h 15m1 stop

5:05 am - 10:46 amSEA-CPR

4h 41m1 stop

$238United Airlines

Find Deal

Tue, Nov 18 - Tue, Dec 9

1:25 pm - 10:30 pmCPR-SEA

10h 05m2 stops

5:05 am - 10:46 amSEA-CPR

4h 41m1 stop

$244United Airlines

Find Deal

Tue, Nov 18 - Tue, Dec 9

6:05 pm - 11:10 pmCPR-SEA

6h 05m1 stop

5:05 am - 12:31 pmSEA-CPR

6h 26m1 stop

$256United Airlines

Find Deal

Thu, Nov 20 - Thu, Nov 27

1:25 pm - 9:13 pmCPR-SEA

8h 48m1 stop

5:05 am - 2:38 pmSEA-CPR

8h 33m1 stop

$308United Airlines

Find Deal

Wed, Nov 19 - Fri, Dec 5

11:20 am - 11:15 pmCPR-SEA

12h 55m2 stops

5:05 am - 10:46 amSEA-CPR

4h 41m1 stop

$314United Airlines

Find Deal

Wed, Nov 19 - Tue, Dec 9

11:20 am - 11:15 pmCPR-SEA

12h 55m2 stops

9:25 am - 10:15 pmSEA-CPR

11h 50m2 stops

$319United Airlines

Find Deal

Wed, Nov 19 - Fri, Dec 5

1:25 pm - 9:13 pmCPR-SEA

8h 48m1 stop

5:05 am - 12:31 pmSEA-CPR

6h 26m1 stop

$338United Airlines

Find Deal

Fri, Nov 21 - Wed, Dec 10

1:25 pm - 9:13 pmCPR-SEA

8h 48m1 stop

9:05 am - 10:15 pmSEA-CPR

12h 10m2 stops

$344United Airlines

Find Deal

Fri, Nov 21 - Tue, Dec 9

7:00 am - 8:51 pmCPR-SEA

14h 51m3 stops

5:05 am - 10:46 amSEA-CPR

4h 41m1 stop

$349United Airlines

Find Deal

Thu, Nov 20 - Fri, Dec 5

11:26 am - 9:01 pmCPR-SEA

10h 35m3 stops

8:45 am - 8:35 pmSEA-CPR

10h 50m2 stops

$354United Airlines

Find Deal

Sat, Feb 28 - Tue, Mar 3

United Airlines flights from Casper to Seattle

Our best United Airlines deals on Casper to Seattle flight tickets

United Airlines

Nov 18

CPR3:18 pmCasper Natrona County

7h 15m

1 stop

SEA9:33 pmSeattle/Tacoma Intl

Dec 9

SEA5:05 amSeattle/Tacoma Intl

4h 41m

1 stop

CPR10:46 amCasper Natrona County

$238

Find similar

United Airlines

Nov 18

CPR1:25 pmCasper Natrona County

10h 05m

2 stops

SEA10:30 pmSeattle/Tacoma Intl

Dec 9

SEA5:05 amSeattle/Tacoma Intl

4h 41m

1 stop

CPR10:46 amCasper Natrona County

$244

Find similar

United Airlines

Nov 20

CPR6:05 pmCasper Natrona County

6h 05m

1 stop

SEA11:10 pmSeattle/Tacoma Intl

Nov 27

SEA5:05 amSeattle/Tacoma Intl

6h 26m

1 stop

CPR12:31 pmCasper Natrona County

$256

Find similar

Fly from

Fly to

Route

Depart

Return

Price

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Tue 11/18

3:18 pm-9:33 pm

1 stop7h 15m

Seattle/Tacoma Intl

Tue 12/9

5:05 am-10:46 am

1 stop4h 41m

$238

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Tue 11/18

1:25 pm-10:30 pm

2 stops10h 05m

Seattle/Tacoma Intl

Tue 12/9

5:05 am-10:46 am

1 stop4h 41m

$244

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Thu 11/20

6:05 pm-11:10 pm

1 stop6h 05m

Seattle/Tacoma Intl

Thu 11/27

5:05 am-12:31 pm

1 stop6h 26m

$256

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 11/19

1:25 pm-9:13 pm

1 stop8h 48m

Seattle/Tacoma Intl

Fri 12/5

5:05 am-2:38 pm

1 stop8h 33m

$308

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 11/19

11:20 am-11:15 pm

2 stops12h 55m

Seattle/Tacoma Intl

Tue 12/9

5:05 am-10:46 am

1 stop4h 41m

$314

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 11/19

11:20 am-11:15 pm

2 stops12h 55m

Seattle/Tacoma Intl

Fri 12/5

9:25 am-10:15 pm

2 stops11h 50m

$319

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Fri 11/21

1:25 pm-9:13 pm

1 stop8h 48m

Seattle/Tacoma Intl

Wed 12/10

5:05 am-12:31 pm

1 stop6h 26m

$338

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Fri 11/21

1:25 pm-9:13 pm

1 stop8h 48m

Seattle/Tacoma Intl

Tue 12/9

9:05 am-10:15 pm

2 stops12h 10m

$344

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Thu 11/20

7:00 am-8:51 pm

3 stops14h 51m

Seattle/Tacoma Intl

Fri 12/5

5:05 am-10:46 am

1 stop4h 41m

$349

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Sat 2/28

11:26 am-9:01 pm

3 stops10h 35m

Seattle/Tacoma Intl

Tue 3/3

8:45 am-8:35 pm

2 stops10h 50m

$354

Flights are sorted by cheapest round-trip flights first.

Sorted 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

What is the cheapest month to fly to Seattle?

In general, February 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 $308. If you don’t want to visit Seattle in February, then you should wait until April to fly from Casper, when ticket prices are also cheap, with an average price of $343.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Casper is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $557. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday is the most expensive day to depart from Casper because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $718.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Casper in the morning is the least expensive time of day to depart. momondo users have found prices as low as $568 when looking at flights departing in the morning. Flights to Seattle are more costly in the afternoon, with an average ticket price of $577. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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

Direct flights	None

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

Search flight deals

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 49m, 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 September 2025, 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 $256	Free Cancellation	Rating 7.4 8,926 reviews		Search United Airlines flights

Leavenworth

Tacoma

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Federal Way

Kirkland

Tukwila

Shoreline

Lakewood

Centralia

Fife

Cle Elum

Redmond

Westport

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.