What is the cheapest airline to fly from Casper to Seattle round-trip?

Flying on United Airlines is currently your cheapest option to Seattle, with prices starting at $299. You may be able to fly from Casper to Seattle for 40% less than the average price by searching for this airline.

What is the cheapest day to fly from Casper to Seattle?

Travelers seeking maximum savings on their Casper to Seattle flight should consider departing on Tuesday mornings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

What is the cheapest day to fly round-trip from Casper to Seattle?

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

What is the cheapest month to fly from Casper to Seattle?

The best pricing can be found in the month of February. Prices to Seattle from Casper average $503. You can even find prices in February for less than $503, as users have found deals to Seattle from as low as $278. The month of August appears to be one of the more expensive times to travel to Seattle from Casper. Flying in the targeted month can save you up to 53%.

What is the cheapest time of day to fly from CPR to SEA?

It’s typically best to fly out from Casper to Seattle in the morning. Doing so could potentially save you 2% on the flight price compared to flying in the afternoon, which is usually more expensive.

Can I find deals for flights from Casper to Seattle that include hotel bookings?

Yes. In addition to deals on Casper to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Casper to Seattle?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Casper to Seattle.

Can I find deals for business class flights from Casper to Seattle?

Yes. Cheapflights offers flight deals from Casper to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$299+ Flights from Casper to Seattle

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Cheap flight deals from Casper to Seattle

Round-trip from	$299 (United Airlines)
Popular in	August
Cheapest in	February
Average price	$578

From Casper Natrona County to Seattle/Tacoma Intl

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($78 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($25 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Find flight deals from Casper to Seattle

Cheapest flights from Casper to Seattle
Explore the most affordable flight options available from Casper to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

Wed 10/156:00 pmCPR - SEA

1 stop6h 29mUnited Airlines

Wed 10/228:30 amSEA - CPR

1 stop5h 07mUnited Airlines

Deal found 6/29

$299

Best flights from Casper to Seattle
Discover carefully curated flight deals from Casper to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 30, 2025.

Wed 10/156:00 pmCPR - SEA

1 stop6h 29mUnited Airlines

Wed 10/2212:43 pmSEA - CPR

1 stop5h 04mUnited Airlines

Deal found 6/30

$299

Last-minute flights from Casper to Seattle
Discover last-minute flight deals from Casper to Seattle. Data last updated June 30, 2025 and is based on user searches.

Wed 7/239:03 amCPR - SEA

2 stops14h 13mUnited Airlines

Wed 7/306:45 amSEA - CPR

2 stops12h 41mUnited Airlines

Deal found 6/30

$349

Cheapflights Fare Finder

Use the filters below to find and compare flights from Casper to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CasperSeattle

CPR - SEA

CPRSEA

Casper Natrona County

Wed 10/15

6:00 pm-11:29 pm

1 stop6h 29m

Seattle/Tacoma Intl

Wed 10/22

8:30 am-2:37 pm

1 stop5h 07m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Best time to book a flight from Casper to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Casper with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Casper to Seattle

What is the cheapest month to book a flight from Casper to Seattle?

Currently, January is the cheapest month in which you can book a flight from Casper to Seattle (average of $238). Flying from Casper to Seattle in July is currently the most expensive (average of $391). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Casper to Seattle?

Reviews of airlines servicing Seattle

See what other customers who have flown with United Airlines from Casper to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,852 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,852 reviews

United Airlines

7.4

Good

8,852 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

What is the cheapest airline to fly from Casper to Seattle round-trip?
Flying on United Airlines is currently your cheapest option to Seattle, with prices starting at $299. You may be able to fly from Casper to Seattle for 40% less than the average price by searching for this airline.
Can I find deals for flights from Casper to Seattle that include hotel bookings?
Yes. In addition to deals on Casper to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Casper to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Casper to Seattle.
Can I find deals for business class flights from Casper to Seattle?
Yes. Cheapflights offers flight deals from Casper to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Casper to Seattle?
Currently, January is the cheapest month in which you can book a flight from Casper to Seattle (average of $238). Flying from Casper to Seattle in July is currently the most expensive (average of $391). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Other flights to Seattle

Top airline flying from Casper to Seattle

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$308	Average$557	FlexibilityNo cancel fee	On-time69%

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$299+ Cheap flights from Casper to Seattle (CPR - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Casper to Seattle with Cheapflights

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Cheap flight deals from Casper to Seattle

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Casper to Seattle

Cheapest flights from Casper to SeattleExplore the most affordable flight options available from Casper to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

Explore the most affordable flight options available from Casper to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Casper to Seattle that are best for you.

Best time to book a flight from Casper to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Casper with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Casper to Seattle

What is the cheapest month to book a flight from Casper to Seattle?

How much does it cost to fly round-trip from Casper to Seattle?

Reviews of airlines servicing Seattle

See what other customers who have flown with United Airlines from Casper to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Casper to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What is the cheapest airline to fly from Casper to Seattle round-trip?

Can I find deals for flights from Casper to Seattle that include hotel bookings?

How can I find direct flights from Casper to Seattle?

Can I find deals for business class flights from Casper to Seattle?

What is the cheapest month to book a flight from Casper to Seattle?

Traveling to a place near Casper?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Casper to Seattle

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Top airline flying from Casper to Seattle

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Book with Flexibility

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Cheapest flights from Casper to Seattle
Explore the most affordable flight options available from Casper to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.