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

$258 Cheap Flights from Boise (BOI) to Casper (CPR)

View $258 flight on Thu, Sep 10, 2026Opens in a new window

Popular airlines from Boise Airport (BOI) to Casper, WY (CPR-Natrona County Intl.)

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Cheap Flights from Boise to Casper (BOI-CPR)

Prices were available within the past 7 days and start at $258 for one-way flights and $288 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Sep 10 - Sun, Sep 13
BOI
Boise
CPR
Casper
$288 Roundtrip, found 7 hours ago
$288
Roundtrip
found 7 hours ago
Select United flight, departing Thu, Sep 10 from Boise to Casper, returning Sun, Sep 13, priced at $288 found 7 hours ago
United
Thu, Sep 10 - Sun, Sep 13
BOI
Boise
CPR
Casper
$303 Roundtrip, found 7 hours ago
$303
Roundtrip
found 7 hours ago
Select United flight, departing Thu, Sep 10 from Boise to Casper, returning Sun, Sep 13, priced at $303 found 7 hours ago
United
Thu, Sep 10 - Sun, Sep 13
BOI
Boise
CPR
Casper
$305 Roundtrip, found 7 hours ago
$305
Roundtrip
found 7 hours ago
Select United flight, departing Thu, Sep 10 from Boise to Casper, returning Sun, Sep 13, priced at $305 found 7 hours ago
United
Thu, Sep 10 - Sun, Sep 13
BOI
Boise
CPR
Casper
$309 Roundtrip, found 7 hours ago
$309
Roundtrip
found 7 hours ago
Select United flight, departing Thu, Sep 10 from Boise to Casper, returning Sun, Sep 13, priced at $309 found 7 hours ago
United
Thu, Oct 1 - Tue, Oct 6
BOI
Boise
CPR
Casper
$312 Roundtrip, found 7 hours ago
$312
Roundtrip
found 7 hours ago
Select United flight, departing Thu, Oct 1 from Boise to Casper, returning Tue, Oct 6, priced at $312 found 7 hours ago
United
Fri, Nov 13 - Mon, Nov 16
BOI
Boise
CPR
Casper
$314 Roundtrip, found 7 hours ago
$314
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Nov 13 from Boise to Casper, returning Mon, Nov 16, priced at $314 found 7 hours ago
United
Fri, Nov 13 - Mon, Nov 16
BOI
Boise
CPR
Casper
$317 Roundtrip, found 7 hours ago
$317
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Nov 13 from Boise to Casper, returning Mon, Nov 16, priced at $317 found 7 hours ago
United
Wed, Aug 19 - Sat, Aug 22
BOI
Boise
CPR
Casper
$318 Roundtrip, found 7 hours ago
$318
Roundtrip
found 7 hours ago
Select United flight, departing Wed, Aug 19 from Boise to Casper, returning Sat, Aug 22, priced at $318 found 7 hours ago
United
Thu, Sep 10 - Sun, Sep 13
BOI
Boise
CPR
Casper
$321 Roundtrip, found 7 hours ago
$321
Roundtrip
found 7 hours ago
Select United flight, departing Thu, Sep 10 from Boise to Casper, returning Sun, Sep 13, priced at $321 found 7 hours ago
United
Thu, Sep 10 - Sun, Sep 13
BOI
Boise
CPR
Casper
$324 Roundtrip, found 7 hours ago
$324
Roundtrip
found 7 hours ago
Select United flight, departing Thu, Sep 10 from Boise to Casper, returning Sun, Sep 13, priced at $324 found 7 hours 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 $318
CPR
Natrona County Intl.
CheapestClosest
Average driving time to city center12 min
Flights from $318

What you need to know for your flight from Boise to Natrona County Intl.

Boise (BOI) to Casper (CPR) at a glance

Travel from Boise (BOI) to Casper (CPR) with a full-service airline on this domestic short-haul route. Discover flight options that align with your travel plans as you visit Casper's renowned attractions and neighborhoods. Here, you’ll find essential details for flights departing from Boise Airport to Natrona County International Airport.

  • Fastest flight duration: around 3h 15m in-flight, plus roughly 1h 15m layover with one stop
  • Route distance: roughly 500 miles (805 km)
  • Flights per week: around 8 departures on average
  • Typical fares (one-way): economy tickets often range from $110–$420, depending on seasonality and how far ahead you book

Flights from Boise Airport (BOI) to Natrona County International Airport (CPR)

Based on the latest traveler bookings, here are the top airlines favored for one-stop journeys from Boise to Casper, often featuring a popular layover at Denver International Airport (DEN), which typically lasts about 1 hour and 15 minutes. This allows you to mix and match options for price, total travel time, and cabin class to secure the ideal itinerary.

  • United: This comprehensive airline provides a convenient one-stop service, with one-way ticket prices generally falling between $110 and $420. It dominates departures on this route, featuring a flight duration of 3 hours and 15 minutes, while the overall travel time, including layover, is approximately 4 hours and 30 minutes.

How to find the best prices for flights from Boise (BOI) to Casper (CPR)

Getting some of the best deals on flights from Boise 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 available when booking 2-8 weeks in advance, although most travelers tend to book within 2 weeks. Additionally, afternoon departures from 12 PM to 6 PM not only offer lower prices but are also the most popular. Flying on Thursdays can provide both cost savings and increased travel demand.
  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 Boise Airport

Casper welcomes travelers from Boise with a range of transport options based on price, convenience, and proximity. 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 located about 0.4 miles away by car, providing convenient access for travelers heading to the water.

Frequently asked questions

How much does a flight from Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.) cost?
You can find cheap one-way flights from $258 and cheap return flights from $288 Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.) with Expedia. One-way flights generally range between $274 and $593, and roundtrip flights usually range from $330 to $1328. 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 Boise, ID (BOI) 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 Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.)?
The cheapest month to fly from BOI 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 Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.)?
Enter BOI to CPR and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.)?
United is one of the cheapest airlines offering connecting flights from Boise, ID (BOI) to Casper, WY (CPR), starting from around $218 for a round-trip ticket. 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 Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.)?
To find a cheap flight from Boise, ID (BOI) 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 Boise, ID (BOI) 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 Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from BOI to CPR. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.)?
Flying from BOI to CPR with a connection usually takes about 5 hours 50 minutes, traveling roughly 493 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 Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.)?
First class seats are offered on the BOI to CPR route with United Airlines.
How do I earn miles on a Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.) flight with Expedia?
It's easy to earn miles on a Boise, ID (BOI) 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 BOI (BOI)?
If you're planning to travel to Casper from BOI (BOI), you can fly into Natrona County Intl. (CPR) Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Los Angeles Intl. (LAX), Portland Intl. (PDX) 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 Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.) at the last minute?
Typically, booking a last minute flight from Boise, ID (BOI) 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 Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.) flight and hotel package?
Securing a Boise, ID (BOI) 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 Boise, ID (BOI) to Casper, WY (CPR-Natrona County Intl.)?
If you booked your Boise, ID (BOI) 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
Boise
Destination airport
Natrona County Intl.
Airlines serving
United
Roundtrip price
$288
Distance
492 mi

Book with confidence

Boise to Casper Flights

The cheapest times to fly from Boise 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 Boise to Casper are during the month of September. You can find some of the cheapest flights from Boise to Casper with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boise to Casper

Sunday is one of the best days to book for cheap flights from Boise 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 Boise 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 Boise to Casper in 2026. You can also book with separate airlines for your outbound and return journeys, from $258 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 Boise 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 Boise 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.

 

Boise to Casper Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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