Cheap Flights from Castries (SLU) to Boise (BOI)

Popular airlines from George F. L. Charles Airport (SLU) to Boise Airport (BOI)

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Flights from Castries (SLU) to Boise (BOI)
Origin airport
George F. L. Charles
Destination airport
Boise
Distance
3827 mi

Castries to Boise Flights

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

 

The best time to book a flight from Castries to Boise

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

 

Frequently asked questions

How much does a flight from George F. L. Charles Airport (SLU) to Boise Airport (BOI) cost?
Snag a cheap one-way flight or cheap return flight from George F. L. Charles Airport (SLU) to Boise Airport (BOI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from George F. L. Charles Airport (SLU) to Boise Airport (BOI)?
The cheapest month to fly from SLU to BOI is , when demand is low. Off-peak months are usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from George F. L. Charles Airport (SLU) to Boise Airport (BOI)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SLU to BOI flight.
How many flights per day from George F. L. Charles Airport (SLU) to Boise Airport (BOI)?
You'll have to book a flight with a layover when traveling from George F. L. Charles Airport (SLU) to Boise Airport (BOI). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from SLU to BOI?
Usually you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from George F. L. Charles Airport (SLU) to Boise Airport (BOI)?
To land at Boise Airport (BOI) on schedule, opt for a flight that leaves from George F. L. Charles Airport (SLU) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from George F. L. Charles Airport (SLU) to Boise Airport (BOI) last-minute?
Booking your flight from SLU to BOI right before your trip is usually more expensive. However, if there's some wiggle room with your travel times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a SLU to BOI flight and hotel package?
Compared with arranging hotels and flights separately, booking a SLU to BOI flight and hotel package with Expedia could result in significant savings. What's more, having it all in one place will take the hassle out of travel planning. Simply pick your flights and select from our wide range of stays, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from George F. L. Charles Airport (SLU) to Boise Airport (BOI)?
If you booked your SLU to 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, go to our Customer Service portal for more details.

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