$154 Cheap Flights from Louisville (SDF) to Boise (BOI)

View $154 flight on Thu, Jul 3, 2025Opens in a new window

Popular airlines from Louisville Intl. Airport (SDF) to Boise Airport (BOI)

Find available prices by choosing your travel dates.

Cheap Flights from Louisville to Boise (SDF-BOI)

Prices were available within the past 7 days and start at $154 for one-way flights and $307 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, Aug 31 - Sun, Sep 7
SDF
Louisville
BOI
Boise
$307 Roundtrip, found 6 hours ago
$307
Roundtrip
found 6 hours ago
Select Delta flight, departing Sun, Aug 31 from Louisville to Boise, returning Sun, Sep 7, priced at $307 found 6 hours ago
American Airlines
Sun, Aug 31 - Sun, Sep 7
SDF
Louisville
BOI
Boise
$312 Roundtrip, found 6 hours ago
$312
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Sun, Aug 31 from Louisville to Boise, returning Sun, Sep 7, priced at $312 found 6 hours ago
Delta
Sat, May 24 - Tue, Jun 10
SDF
Louisville
BOI
Boise
$312 Roundtrip, found 18 hours ago
$312
Roundtrip
found 18 hours ago
Select Delta flight, departing Sat, May 24 from Louisville to Boise, returning Tue, Jun 10, priced at $312 found 18 hours ago
Delta
Wed, Jul 2 - Tue, Jul 8
SDF
Louisville
BOI
Boise
$325 Roundtrip, just found
$325
Roundtrip
just found
Select Delta flight, departing Wed, Jul 2 from Louisville to Boise, returning Tue, Jul 8, priced at $325 just found
American Airlines
Sat, Jun 7 - Tue, Jun 10
SDF
Louisville
BOI
Boise
$327 Roundtrip, found 11 hours ago
$327
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Sat, Jun 7 from Louisville to Boise, returning Tue, Jun 10, priced at $327 found 11 hours ago
Delta
Thu, Jul 3 - Thu, Jul 10
SDF
Louisville
BOI
Boise
$330 Roundtrip, just found
$330
Roundtrip
just found
Select Delta flight, departing Thu, Jul 3 from Louisville to Boise, returning Thu, Jul 10, priced at $330 just found
Southwest Airlines
Sat, Jul 5 - Tue, Jul 8
SDF
Louisville
BOI
Boise
$330 Roundtrip, found 10 hours ago
$330
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Sat, Jul 5 from Louisville to Boise, returning Tue, Jul 8, priced at $330 found 10 hours ago
American Airlines
Sun, Aug 31 - Sun, Sep 7
SDF
Louisville
BOI
Boise
$332 Roundtrip, found 6 hours ago
$332
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Sun, Aug 31 from Louisville to Boise, returning Sun, Sep 7, priced at $332 found 6 hours ago
United
Wed, Jun 4 - Wed, Jun 11
SDF
Louisville
BOI
Boise
$335 Roundtrip, found 8 hours ago
$335
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Jun 4 from Louisville to Boise, returning Wed, Jun 11, priced at $335 found 8 hours ago
Spirit Airlines
Thu, Sep 11 - Sat, Sep 20
SDF
Louisville
BOI
Boise
$453 Roundtrip, found 6 days ago
$453
Roundtrip
found 6 days ago
Select Spirit Airlines flight, departing Thu, Sep 11 from Louisville to Boise, returning Sat, Sep 20, priced at $453 found 6 days ago
Flights from Louisville (SDF) to Boise (BOI)
Origin airport
Louisville Intl.
Destination airport
Boise
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$306
Distance
1625 mi

Louisville to Boise Flights

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

The best time to book a flight from Louisville to Boise

Sunday is one of the best days to book for cheap flights from Louisville 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 Louisville 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 Louisville to Boise in 2025. You can also book with separate airlines for your outbound and return journeys, from $154 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 Louisville 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 Louisville 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 Louisville Intl. Airport (SDF) to Boise Airport (BOI) cost?
Discover the latest flight deals from SDF 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 SDF to BOI?
The cheapest flights from SDF 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 SDF to BOI?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from SDF to BOI. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Louisville Intl. Airport (SDF) to Boise Airport (BOI)?
Direct flights from Louisville Intl. Airport (SDF) to Boise Airport (BOI) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filters. Enter your dates and pick either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from SDF to BOI?
You’ll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Louisville Intl. Airport (SDF) to Boise Airport (BOI)?
To land at Boise Airport (BOI) on time, select a flight that takes off from Louisville Intl. Airport (SDF) before 3 PM. The chance 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 Louisville Intl. Airport (SDF) to Boise Airport (BOI) last-minute?
Holding off until just before your departure to book your flight from SDF to BOI generally means paying more. While it’s possible to find some last-minute offers, they’re not always guaranteed. Be flexible with your travel plans to maximize your chances of scoring a bargain.
Is it cheaper to book a SDF to BOI flight and hotel package?
Compared with arranging hotels and flights separately, booking a SDF to BOI flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place takes the hassle out of travel planning. Simply secure your flights and select from our extensive range of stays, then personalize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Louisville Intl. Airport (SDF) to Boise Airport (BOI)?
It’s generally possible to cancel or reschedule your SDF to BOI flight. However, if it’s been more than 24 hours since booking, additional fees may apply. Check your airline’s policies in your itinerary to see what changes are allowed and whether any costs are involved. You’ll also find more information on our Customer Service portal.

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*Available to One Key members.