$272 Cheap Flights from Boise (BOI) to St. Thomas (STT)

View $272 flight on Mon, Mar 9, 2026Opens in a new window

Popular airlines from Boise Airport (BOI) to Cyril E. King Airport (STT)

Cheap Flights from Boise to St. Thomas (BOI-STT)

Prices were available within the past 7 days and start at $272 for one-way flights and $609 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Sep 15 - Tue, Sep 22
BOI
Boise
STT
St. Thomas
$609 Roundtrip, found 3 hours ago
$609
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Sep 15 from Boise to St. Thomas, returning Tue, Sep 22, priced at $609 found 3 hours ago
United
Thu, Jan 22 - Thu, Jan 29
BOI
Boise
STT
St. Thomas
$617 Roundtrip, found 1 day ago
$617
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 22 from Boise to St. Thomas, returning Thu, Jan 29, priced at $617 found 1 day ago
United
Tue, Feb 3 - Mon, Feb 16
BOI
Boise
STT
St. Thomas
$618 Roundtrip, found 1 day ago
$618
Roundtrip
found 1 day ago
Select United flight, departing Tue, Feb 3 from Boise to St. Thomas, returning Mon, Feb 16, priced at $618 found 1 day ago
American Airlines
Wed, Feb 18 - Mon, Feb 23
BOI
Boise
STT
St. Thomas
$619 Roundtrip, found 21 hours ago
$619
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Wed, Feb 18 from Boise to St. Thomas, returning Mon, Feb 23, priced at $619 found 21 hours ago
United
Fri, Feb 27 - Tue, Mar 10
BOI
Boise
STT
St. Thomas
$623 Roundtrip, found 5 days ago
$623
Roundtrip
found 5 days ago
Select United flight, departing Fri, Feb 27 from Boise to St. Thomas, returning Tue, Mar 10, priced at $623 found 5 days ago
United
Tue, Feb 3 - Mon, Feb 16
BOI
Boise
STT
St. Thomas
$629 Roundtrip, found 1 day ago
$629
Roundtrip
found 1 day ago
Select United flight, departing Tue, Feb 3 from Boise to St. Thomas, returning Mon, Feb 16, priced at $629 found 1 day ago
United
Thu, Jan 22 - Wed, Jan 28
BOI
Boise
STT
St. Thomas
$634 Roundtrip, found 4 days ago
$634
Roundtrip
found 4 days ago
Select United flight, departing Thu, Jan 22 from Boise to St. Thomas, returning Wed, Jan 28, priced at $634 found 4 days ago
Delta
Mon, Apr 20 - Wed, Apr 22
BOI
Boise
STT
St. Thomas
$639 Roundtrip, found 1 day ago
$639
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Apr 20 from Boise to St. Thomas, returning Wed, Apr 22, priced at $639 found 1 day ago
United
Tue, Feb 3 - Mon, Feb 16
BOI
Boise
STT
St. Thomas
$643 Roundtrip, found 1 day ago
$643
Roundtrip
found 1 day ago
Select United flight, departing Tue, Feb 3 from Boise to St. Thomas, returning Mon, Feb 16, priced at $643 found 1 day ago
Southwest Airlines
Mon, Feb 23 - Sun, Mar 8
BOI
Boise
STT
St. Thomas
$644 Roundtrip, found 1 day ago
$644
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Mon, Feb 23 from Boise to St. Thomas, returning Sun, Mar 8, priced at $644 found 1 day ago

Alternative airports near St. Thomas

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

Select flight to Terrance B. Lettsome Intl. EIS. Flights from $1,144
EIS
Terrance B. Lettsome Intl.
Flights from $1,144

Frequently asked questions

How much does a flight from Boise Airport (BOI) to Cyril E. King Airport (STT) cost?
Grab a cheap one-way flight from $272 or cheap return flight from $609 from Boise Airport (BOI) to Cyril E. King Airport (STT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Boise Airport (BOI) to Cyril E. King Airport (STT)?
Traveling in September is a good way to save, as it's the cheapest month for flights between BOI and STT. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Boise Airport (BOI) to Cyril E. King Airport (STT)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from BOI to STT. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from Boise Airport (BOI) to Cyril E. King Airport (STT)?
Direct flights from Boise Airport (BOI) to Cyril E. King Airport (STT) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BOI to STT?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* But this can change based 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 Boise Airport (BOI) to Cyril E. King Airport (STT)?
Opt for a flight from Boise Airport (BOI) to Cyril E. King Airport (STT) that takes off before 3 PM to reduce the risk of cancellations. Departures after this time are on average 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 Boise Airport (BOI) to Cyril E. King Airport (STT) last-minute?
Booking your flight from BOI to STT shortly before your journey is typically more expensive. However, if there's some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a BOI to STT flight and hotel package?
Securing a BOI to STT flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our wide range of accommodations and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Boise Airport (BOI) to Cyril E. King Airport (STT)?
Typically, you're able to cancel or reschedule your BOI to STT flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you need further details, head to our Customer Service portal.

Travel information

Origin airport
Boise
Destination airport
Cyril E. King
Airlines serving
American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$609
Distance
3431 mi

Book with confidence

Boise to St. Thomas Flights

The cheapest times to fly from Boise to St. Thomas

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

 

The best time to book a flight from Boise to St. Thomas

Sunday is one of the best days to book for cheap flights from Boise to St. Thomas: 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 St. Thomas

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 St. Thomas in 2025. You can also book with separate airlines for your outbound and return journeys, from $272 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 St. Thomas 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 St. Thomas 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 St. Thomas Flights

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*Available to One Key members.