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

View $258 flight on Sun, Nov 8, 2026Opens in a new window

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

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Cheap Flights from Casper to Boise (CPR-BOI)

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
Wed, Dec 9 - Sat, Dec 12
CPR
Casper
BOI
Boise
$288 Roundtrip, found 1 day ago
$288
Roundtrip
found 1 day ago
Select United flight, departing Wed, Dec 9 from Casper to Boise, returning Sat, Dec 12, priced at $288 found 1 day ago
United
Wed, Dec 9 - Sat, Dec 12
CPR
Casper
BOI
Boise
$307 Roundtrip, found 1 day ago
$307
Roundtrip
found 1 day ago
Select United flight, departing Wed, Dec 9 from Casper to Boise, returning Sat, Dec 12, priced at $307 found 1 day ago
United
Sat, Sep 26 - Tue, Sep 29
CPR
Casper
BOI
Boise
$311 Roundtrip, found 2 days ago
$311
Roundtrip
found 2 days ago
Select United flight, departing Sat, Sep 26 from Casper to Boise, returning Tue, Sep 29, priced at $311 found 2 days ago
United
Sat, Sep 26 - Tue, Sep 29
CPR
Casper
BOI
Boise
$312 Roundtrip, found 2 days ago
$312
Roundtrip
found 2 days ago
Select United flight, departing Sat, Sep 26 from Casper to Boise, returning Tue, Sep 29, priced at $312 found 2 days ago
United
Fri, Aug 14 - Sat, Aug 15
CPR
Casper
BOI
Boise
$318 Roundtrip, found 3 days ago
$318
Roundtrip
found 3 days ago
Select United flight, departing Fri, Aug 14 from Casper to Boise, returning Sat, Aug 15, priced at $318 found 3 days ago
United
Wed, Dec 9 - Sat, Dec 12
CPR
Casper
BOI
Boise
$321 Roundtrip, found 1 day ago
$321
Roundtrip
found 1 day ago
Select United flight, departing Wed, Dec 9 from Casper to Boise, returning Sat, Dec 12, priced at $321 found 1 day ago
United
Fri, Aug 14 - Sat, Aug 15
CPR
Casper
BOI
Boise
$326 Roundtrip, found 3 days ago
$326
Roundtrip
found 3 days ago
Select United flight, departing Fri, Aug 14 from Casper to Boise, returning Sat, Aug 15, priced at $326 found 3 days ago
United
Sat, Sep 26 - Tue, Sep 29
CPR
Casper
BOI
Boise
$329 Roundtrip, found 2 days ago
$329
Roundtrip
found 2 days ago
Select United flight, departing Sat, Sep 26 from Casper to Boise, returning Tue, Sep 29, priced at $329 found 2 days ago
United
Fri, Aug 14 - Sat, Aug 15
CPR
Casper
BOI
Boise
$331 Roundtrip, found 3 days ago
$331
Roundtrip
found 3 days ago
Select United flight, departing Fri, Aug 14 from Casper to Boise, returning Sat, Aug 15, priced at $331 found 3 days ago
United
Fri, Aug 14 - Sat, Aug 15
CPR
Casper
BOI
Boise
$333 Roundtrip, found 3 days ago
$333
Roundtrip
found 3 days ago
Select United flight, departing Fri, Aug 14 from Casper to Boise, returning Sat, Aug 15, priced at $333 found 3 days ago

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

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

Travel from Casper (CPR) to Boise (BOI) with a full-service airline on this short domestic route. Discover the best itinerary that aligns with your schedule while you visit Boise's renowned attractions and neighborhoods. Check out the essential details for your flight trip from Natrona County International Airport to Boise Airport for convenient travel planning.

  • Fastest flight duration: around 3h 30m in-flight, plus roughly 1 hour 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–$395, depending on seasonality and how far ahead you book

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

According to recent traveler bookings, the most popular airlines flying from Casper to Boise typically offer one-stop services, with common layovers at Denver International Airport (DEN), which usually have about a one-hour wait time. This allows travelers the flexibility to consider various options regarding price, total travel time, and cabin class to secure the best itinerary.

  • United: As a comprehensive airline provider, United delivers seamless one-stop services, with one-way ticket prices generally falling between $110 and $395. They operate nearly all departures on this route, featuring an in-flight duration of 3 hours and 30 minutes, and an overall travel time of around 4 hours and 30 minutes, including layovers.

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

Getting some of the best deals on flights from Casper to Boise 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. Afternoon departures from 12 PM to 6 PM are not only among the cheapest but also the most popular. Additionally, flying on Saturday often provides lower prices, while Thursday remains the busiest 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.*
  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 Boise Airport from Natrona County International Airport

Boise welcomes travelers from Casper with a range of transport options based on price, convenience, and proximity. Here's how to reach Boise efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Boise, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Boise Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Boise 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 Boise Airport, Boise Station, a train station, is located about 2.4 miles away by car, while Boise Bus Station, a bus station, is situated approximately 3.8 miles away by car, offering convenient transport options for travelers.

Frequently asked questions

How much does a flight from Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) cost?
You can find cheap one-way flights from $258 and cheap return flights from $288 Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) with Expedia. One-way flights generally range between $274 and $868, and roundtrip flights usually range from $341 to $1204. 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 Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) 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 Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
April is the cheapest month to fly from Casper to Boise, with average return fares around $278. This is about 28% lower than the average price throughout the year, as spring often sees a dip in travel demand. Other affordable months to fly from Casper to Boise include January and February.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
Enter CPR to BOI and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
United is one of the cheapest airlines offering connecting flights from Casper, WY (CPR) to Boise, ID (BOI), with round-trip tickets starting from around $218. 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 Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
To find a cheap flight from Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI), 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 Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
The best times to fly from Casper (CPR) to Boise (BOI) are in April and January. April offers an average return flight price of about $278, making it a budget-friendly choice. January is also a good option, providing a balance of affordability and flight availability, perfect for your travel plans.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from CPR to BOI. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
The most popular departure times for flights from Casper, WY (CPR) to Boise, ID (BOI) are in the late morning, from 9am to 12pm. About 30% of passengers prefer this time window. Many major carriers, including United Airlines, offer flights during this window. This timing works well because it allows you to start your day early and arrive in Boise with plenty of time to explore.
How long does it take to fly from Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
A flight from CPR to BOI with a layover takes around 4 hours 30 minutes, with the route covering approximately 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 Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
First class seats are offered on the CPR to BOI route with United Airlines.
How do I earn miles on a Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) flight with Expedia?
It's easy to earn miles on a Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) 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.
Is it cheaper to buy a plane ticket from Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) at the last minute?
Typically, booking a last minute flight from Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) 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 Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) flight and hotel package?
Securing a Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) Boise Vacation Packages 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 Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI)?
If you booked your Casper, WY (CPR-Natrona County Intl.) to Boise, ID (BOI) 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
Natrona County Intl.
Destination airport
Boise
Airlines serving
United
Roundtrip price
$288
Distance
492 mi

Book with confidence

Casper to Boise Flights

The cheapest times to fly from Casper to Boise

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

 

The best time to book a flight from Casper to Boise

Sunday is one of the best days to book for cheap flights from Casper to Boise: 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 Casper to Boise

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 Casper to Boise 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 Casper to Boise 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 Casper to Boise 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.

 

Casper to Boise Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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