SEA - CPR

$322 Find Cheap Flights from Seattle to Casper

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Casper departing on 3/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Casper

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Casper, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Casper, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$322
Typical prices: $301-$363
United Airlines
Wed 3/25Tue 3/31
SEA - CPR • 1 stop
Cheapest one-way
$384
United Airlines
Sat 1/31
SEA - CPR • 1 stop
When to travel
September
Cheapest • 30% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Casper!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Casper (SEA-CPR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Casper that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Casper

Wed, Mar 25 - Tue, Mar 31
United Airlines Logo
5:00 am - 10:51 am
SEA
-
CPR
4h 51m
1 stop
United Airlines Logo
5:25 am - 9:46 am
CPR
-
SEA
5h 21m
1 stop
$322United Airlines
Mon, Mar 23 - Sun, Mar 29
United Airlines Logo
8:59 am - 6:57 pm
SEA
-
CPR
8h 58m
1 stop
United Airlines Logo
5:55 pm - 10:56 pm
CPR
-
SEA
6h 01m
1 stop
$328United Airlines
Tue, Mar 24 - Tue, Mar 31
United Airlines Logo
8:59 am - 6:57 pm
SEA
-
CPR
8h 58m
1 stop
United Airlines Logo
11:22 am - 8:57 pm
CPR
-
SEA
10h 35m
2 stops
$334United Airlines
Tue, Feb 10 - Sat, Feb 14
United Airlines Logo
5:00 am - 10:53 am
SEA
-
CPR
4h 53m
1 stop
United Airlines Logo
3:15 pm - 9:12 pm
CPR
-
SEA
6h 57m
1 stop
$338United Airlines
Tue, Mar 24 - Wed, Apr 1
United Airlines Logo
6:32 am - 8:36 pm
SEA
-
CPR
13h 04m
2 stops
United Airlines Logo
5:25 am - 8:57 pm
CPR
-
SEA
16h 32m
2 stops
$339United Airlines
Tue, Feb 10 - Sat, Feb 14
United Airlines Logo
12:25 pm - 7:06 pm
SEA
-
CPR
5h 41m
1 stop
United Airlines Logo
1:20 pm - 11:30 pm
CPR
-
SEA
11h 10m
2 stops
$344United Airlines
Wed, Mar 25 - Sun, Mar 29
United Airlines Logo
5:00 am - 2:40 pm
SEA
-
CPR
8h 40m
1 stop
United Airlines Logo
5:55 pm - 10:56 pm
CPR
-
SEA
6h 01m
1 stop
$363United Airlines
Wed, Mar 25 - Fri, Apr 3
United Airlines Logo
6:32 am - 8:36 pm
SEA
-
CPR
13h 04m
2 stops
United Airlines Logo
1:21 pm - 9:06 pm
CPR
-
SEA
8h 45m
1 stop
$369United Airlines
Wed, Mar 25 - Tue, Mar 31
United Airlines Logo
6:32 am - 8:36 pm
SEA
-
CPR
13h 04m
2 stops
United Airlines Logo
1:21 pm - 8:57 pm
CPR
-
SEA
8h 36m
2 stops
$374United Airlines
Wed, Mar 25 - Mon, Mar 30
United Airlines Logo
5:00 am - 2:40 pm
SEA
-
CPR
8h 40m
1 stop
United Airlines Logo
1:21 pm - 9:06 pm
CPR
-
SEA
8h 45m
1 stop
$398United Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Casper flights

Get data-powered insights and trends into flights from Seattle to Casper to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to Casper?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Casper departing in March.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Casper, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Casper is September, where tickets cost $324 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $813 and $627 respectively.

Find deals

Good to know

Low seasonMay
Cheapest flight$322
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Seattle to Casper

When to book flights from Seattle to Casper

Are your dates flexible? Find out the best times to travel from Seattle to Casper based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Casper

  • What is the cheapest flight from Seattle to Casper?

    In the last 3 days, the lowest price for a flight from Seattle to Casper was $384 for a one-way ticket and $322 for a round-trip.

  • Do I need a passport to fly between Seattle and Casper?

    No, a passport isn't needed to fly from Seattle to Casper. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Seattle to Casper?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Casper?

    Star Alliance is the only airline alliance operating flights between Seattle and Casper.

  • How does KAYAK find such low prices on flights from Seattle to Casper?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Casper.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Casper?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Casper from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Casper?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Casper with an airline and back to Seattle with another airline. Booking your flights between Seattle and CPR can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Casper?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Casper from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Seattle to Casper

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Casper. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Casper? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9199 reviews
7.3Comfort
7.1Entertainment
7.7Boarding
8.1Crew
6.6Food
Airline reviews

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

10.0 ExcellentGerald, Jan 2026
HNL - SFO
Read more United Airlines reviews

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

The flight crew where really good. Better then the crew from BNE to SFO

Delayed, toilets did not flush, pilot parked to far away from Gate

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

left on time, reasonable boarding process arrived early luggage came out quickly

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

Information on your arrival and departure airports

Seattle (SEA)
Casper (CPR)