A golf course with a pond, green fields, and distant mountains.

$263 Cheap Flights from Seattle (SEA) to Casper (CPR)

View $263 flight on Tue, Aug 11, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Casper, WY (CPR-Natrona County Intl.)

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Cheap Flights from Seattle to Casper (SEA-CPR)

Prices were available within the past 7 days and start at $263 for one-way flights and $298 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 8 - Sat, Sep 12
SEA
Seattle
CPR
Casper
$298 Roundtrip, found 6 hours ago
$298
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Sep 8 from Seattle to Casper, returning Sat, Sep 12, priced at $298 found 6 hours ago
United
Tue, Sep 8 - Sat, Sep 12
SEA
Seattle
CPR
Casper
$304 Roundtrip, found 6 hours ago
$304
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Sep 8 from Seattle to Casper, returning Sat, Sep 12, priced at $304 found 6 hours ago
United
Tue, Sep 8 - Sat, Sep 12
SEA
Seattle
CPR
Casper
$309 Roundtrip, found 6 hours ago
$309
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Sep 8 from Seattle to Casper, returning Sat, Sep 12, priced at $309 found 6 hours ago
United
Tue, Aug 4 - Thu, Aug 13
SEA
Seattle
CPR
Casper
$313 Roundtrip, found 2 hours ago
$313
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Aug 4 from Seattle to Casper, returning Thu, Aug 13, priced at $313 found 2 hours ago
United
Tue, Sep 8 - Sat, Sep 12
SEA
Seattle
CPR
Casper
$319 Roundtrip, found 6 hours ago
$319
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Sep 8 from Seattle to Casper, returning Sat, Sep 12, priced at $319 found 6 hours ago
United
Thu, Sep 24 - Sun, Sep 27
SEA
Seattle
CPR
Casper
$328 Roundtrip, found 19 hours ago
$328
Roundtrip
found 19 hours ago
Select United flight, departing Thu, Sep 24 from Seattle to Casper, returning Sun, Sep 27, priced at $328 found 19 hours ago
United
Tue, Sep 8 - Sat, Sep 12
SEA
Seattle
CPR
Casper
$329 Roundtrip, found 6 hours ago
$329
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Sep 8 from Seattle to Casper, returning Sat, Sep 12, priced at $329 found 6 hours ago
United
Sat, Nov 14 - Sun, Nov 22
SEA
Seattle
CPR
Casper
$330 Roundtrip, found 3 days ago
$330
Roundtrip
found 3 days ago
Select United flight, departing Sat, Nov 14 from Seattle to Casper, returning Sun, Nov 22, priced at $330 found 3 days ago
United
Thu, Sep 24 - Sun, Sep 27
SEA
Seattle
CPR
Casper
$335 Roundtrip, found 19 hours ago
$335
Roundtrip
found 19 hours ago
Select United flight, departing Thu, Sep 24 from Seattle to Casper, returning Sun, Sep 27, priced at $335 found 19 hours ago
United
Sat, Nov 14 - Sun, Nov 22
SEA
Seattle
CPR
Casper
$340 Roundtrip, found 3 days ago
$340
Roundtrip
found 3 days ago
Select United flight, departing Sat, Nov 14 from Seattle to Casper, returning Sun, Nov 22, priced at $340 found 3 days ago

Alternative airports near Casper

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Natrona County Intl. CPR. Cheapest and Closest option available. Average driving time to city center is 12 minutes. Flights from $523
CPR
Natrona County Intl.
CheapestClosest
Average driving time to city center12 min
Flights from $523

Find the cheapest month to fly from Seattle (SEA) to Casper (CPR)

June is typically the cheapest month to fly

From $238 - $522 per traveler.

What you need to know for your flight from Seattle - Tacoma Intl. to Natrona County Intl.

Seattle (SEA) to Casper (CPR) at a glance

Travel from Seattle (SEA) to Casper (CPR) on this short domestic route with a full-service airline. Explore the iconic sights and neighborhoods of Casper while selecting an itinerary that aligns with your travel plans. Get all the essential information for flights from Seattle-Tacoma International Airport (SEA) to Natrona County International Airport (CPR) to help you plan your journey efficiently.

  • Fastest flight duration: around 4 hours in-flight, plus roughly 1 hour layover with one stop
  • Route distance: roughly 800 miles (1,290 km)
  • Flights per week: around 8 departures on average
  • Typical fares (one-way): economy tickets often range from $120–$445, depending on seasonality and how far ahead you book

Flights from Seattle - Tacoma International Airport (SEA) to Natrona County International Airport (CPR)

According to recent traveler bookings, the top airlines flying from Seattle to Casper are favored for their one-stop services, with a common layover at Denver International Airport (DEN), typically lasting about one hour. This allows you to tailor your itinerary by considering various factors such as price, total travel time, and cabin class for the best options.

  • United: This comprehensive airline provides one-stop service and dominates departures on this route, with one-way ticket prices generally falling between $120 and $445. Expect an in-air duration of about 4 hours, with the overall travel time, including layover, totaling approximately 5 hours.

Best time to fly from Seattle (SEA) to Casper (CPR)

The most popular months for travelers flying from Seattle to Casper are October, November, and December, when peak temperatures in Casper reach up to 45°F in October. If you prefer quieter travel, consider January, the least busy time to visit with temperatures around 19.6°F and typically the lowest average one-way fare (around $189). Flight availability peaks in April and September, with approximately 9 flights per week, making it easier to find convenient departure times. February, March, May, July, and August have the fewest flights, with approximately 7 flights per week.

  • Cheapest time to fly: January usually offers good deals with average one-way fare around $189, roughly 26% cheaper than the yearly average.
  • Another budget-friendly time to fly: February typically offers an average one-way fare of around $190.
  • Most flight options: April and September have the highest number of flights from Seattle to Casper, with approximately 9 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January19.6°F (-6.9°C)Low8$189
February20.1°F (-6.6°C)Average7$190
March32.7°F (0.4°C)Average7$233
April40.3°F (4.6°C)Average9$277
May52.0°F (11.1°C)Low7$271
June65.3°F (18.5°C)Average8$317
July73.9°F (23.3°C)Low7$270
August71.6°F (22.0°C)Average7$293
September62.8°F (17.1°C)Average9$307
October45.0°F (7.2°C)High8$209
November32.7°F (0.4°C)High8$239
December21.2°F (-6.0°C)High8$281

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Seattle (SEA) to Casper (CPR)

  • Seattle to Casper (BFI-CPR): Boeing Field Airport (BFI) is located approximately 6 miles from Seattle-Tacoma International Airport (SEA), providing a convenient option for travelers heading to Casper.

How to find the best prices for flights from Seattle (SEA) to Casper (CPR)

Getting some of the best deals on flights from Seattle to Casper is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking 2 to 8 weeks in advance, which coincides with when most travelers make their reservations. Morning departures, between 5 a.m. and 12 p.m., tend to offer lower prices and are also the most popular times for flights. Additionally, flying on Friday provides both affordable options and is the most favored travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Casper hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Natrona County International Airport from Seattle - Tacoma International Airport

Casper welcomes travelers from Seattle with a range of transport options based on price, convenience, and proximity. For departures, Seattle - Tacoma International Airport is roughly a 20-minute drive (covering about 14 miles) from central Seattle. Here's how to reach Casper efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Casper, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from Natrona County International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Natrona County International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Natrona County International Airport, Casper Seaport, a seaport, is conveniently located about 0.4 miles away by car.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) cost?
You can find cheap one-way flights from $263 and cheap return flights from $298 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) with Expedia. One-way flights typically cost between $254 and $862, and return flights often range between $344 and $1396. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
The cheapest month to fly from SEA to CPR is September when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
Enter SEA to CPR and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
United is one of the cheapest airlines offering connecting flights from Seattle (SEA) to Casper (CPR), with round-trip tickets starting from around $238 with a layover in San Francisco (SFO). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
The earliest flight from Seattle (SEA) to Casper (CPR) usually leaves at around 12:25 AM, operated by Alaska Airlines and United. This early departure allows you to make the most of your time in Casper. This service operates seasonally in July. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
The most popular departure times for flights from Seattle (SEA) to Casper (CPR) are in the late morning, from 9am to 12pm. About 27% of passengers prefer this time window. Many major carriers, including Delta Air Lines, United Airlines, and Alaska Airlines, offer flights during this window. This timing works well because it allows you to start your day without rushing.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
Flying from SEA to CPR with a connection usually takes about 4 hours 50 minutes, traveling roughly 831 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
First class seats are offered on the SEA to CPR route with United Airlines and Delta Air Lines.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Casper from Seattle - Tacoma Intl. (SEA)?
If you're planning to travel to Casper from Seattle - Tacoma Intl. (SEA), you can fly into Natrona County Intl. (CPR) Some flights may connect through major hubs like Salt Lake City Intl. (SLC), Los Angeles Intl. (LAX), San Francisco Intl. (SFO) before reaching Casper. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Casper, WY (CPR-Natrona County Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Natrona County Intl.
Airlines serving
United
Roundtrip price
$298
Distance
831 mi

Book with confidence

Seattle to Casper Flights

The cheapest times to fly from Seattle to Casper

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Casper are during the month of September. You can find some of the cheapest flights from Seattle to Casper with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Casper

Sunday is one of the best days to book for cheap flights from Seattle to Casper: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Casper

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Casper in 2026. You can also book with separate airlines for your outbound and return journeys, from $263 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Casper flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Casper airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Casper Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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