$1,845 Cheap Flights from Belfast (BFS) to Boise (BOI)

View $1,845 flight on Mon, Sep 8, 2025Opens in a new window

Popular airlines from Belfast International Airport (BFS) to Boise Airport (BOI)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Belfast to Boise (BFS-BOI)

Prices were available within the past 7 days and start at $1,845 for one-way flights and $899 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$899 Roundtrip, found 5 days ago
$899
Roundtrip
found 5 days ago
Select British Airways flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $899 found 5 days ago
British Airways
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$910 Roundtrip, found 5 days ago
$910
Roundtrip
found 5 days ago
Select British Airways flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $910 found 5 days ago
British Airways
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$969 Roundtrip, found 5 days ago
$969
Roundtrip
found 5 days ago
Select British Airways flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $969 found 5 days ago
British Airways
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$970 Roundtrip, found 5 days ago
$970
Roundtrip
found 5 days ago
Select British Airways flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $970 found 5 days ago
American Airlines
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$980 Roundtrip, found 5 days ago
$980
Roundtrip
found 5 days ago
Select American Airlines flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $980 found 5 days ago
British Airways
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$981 Roundtrip, found 5 days ago
$981
Roundtrip
found 5 days ago
Select British Airways flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $981 found 5 days ago
British Airways
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$982 Roundtrip, found 5 days ago
$982
Roundtrip
found 5 days ago
Select British Airways flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $982 found 5 days ago
British Airways
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$993 Roundtrip, found 5 days ago
$993
Roundtrip
found 5 days ago
Select British Airways flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $993 found 5 days ago
Delta
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$1,064 Roundtrip, found 5 days ago
$1,064
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $1,064 found 5 days ago
KLM
Fri, Apr 17 - Tue, Apr 28
BHD
Belfast
BOI
Boise
$1,119 Roundtrip, found 5 days ago
$1,119
Roundtrip
found 5 days ago
Select KLM flight, departing Fri, Apr 17 from Belfast to Boise, returning Tue, Apr 28, priced at $1,119 found 5 days ago
Flights from Belfast (BHD) to Boise (BOI)
Origin airport
George Best Belfast City
Destination airport
Boise
Roundtrip price
$899
Distance
4519 mi

Belfast to Boise Flights

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

 

The best time to book a flight from Belfast to Boise

Sunday is one of the best days to book for cheap flights from Belfast 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 Belfast 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 Belfast to Boise in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,845 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 Belfast 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 Belfast 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 Belfast Intl. Airport (BFS) to Boise Airport (BOI) cost?
Discover the latest flight deals from BFS to BOI by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from BFS to BOI?
The cheapest flights from BFS to BOI are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from BFS to BOI?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from BFS to BOI. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Belfast Intl. Airport (BFS) to Boise Airport (BOI)?
You'll have to hop on a flight with a layover if you're traveling from Belfast Intl. Airport (BFS) to Boise Airport (BOI). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from BFS to BOI?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary based on various factors, such as the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Belfast Intl. Airport (BFS) to Boise Airport (BOI)?
To avoid potential delays on the Belfast Intl. Airport (BFS) to Boise Airport (BOI) route, aim to travel before 3 PM. Flights after this time are 22% more likely to be canceled.**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 Belfast Intl. Airport (BFS) to Boise Airport (BOI) last-minute?
Holding off until right before your break to book a flight from BFS to BOI generally means paying more. Although you may find some last-minute discounts, there's no guarantee. Be flexible with your itinerary for the best chance of snagging a bargain.
Is it cheaper to book a BFS to BOI flight and hotel package?
Compared with arranging hotels and flights separately, booking a BFS to BOI flight and hotel package with Expedia could result in significant savings. Better still, having everything in one easy place will take the hassle out of planning your trip. Just secure your flights and select from our wide range of stays, then tailor your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Belfast Intl. Airport (BFS) to Boise Airport (BOI)?
If you booked your BFS to BOI flight in the last 24 hours, you may be able to cancel or modify 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, visit our Customer Service portal for further details.

Explore a world of travel with Expedia

*Available to One Key members.