$100 Cheap Flights from Boston (BOS) to Louisville (SDF)

View $100 flight on Sun, Aug 24, 2025Opens in a new window

Popular airlines from Logan International Airport (BOS) to Louisville Intl. Airport (SDF)

  • 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 Boston to Louisville (BOS-SDF)

Prices were available within the past 7 days and start at $100 for one-way flights and $199 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Thu, Aug 28 - Sun, Aug 31
BOS
Boston
SDF
Louisville
$199 Roundtrip, found 2 hours ago
$199
Roundtrip
found 2 hours ago
Select Spirit Airlines flight, departing Thu, Aug 28 from Boston to Louisville, returning Sun, Aug 31, priced at $199 found 2 hours ago
Spirit Airlines
Sat, Sep 20 - Sun, Sep 21
BOS
Boston
SDF
Louisville
$207 Roundtrip, found 1 day ago
$207
Roundtrip
found 1 day ago
Select Spirit Airlines flight, departing Sat, Sep 20 from Boston to Louisville, returning Sun, Sep 21, priced at $207 found 1 day ago
Spirit Airlines
Sun, Oct 5 - Thu, Oct 16
BOS
Boston
SDF
Louisville
$211 Roundtrip, found 1 day ago
$211
Roundtrip
found 1 day ago
Select Spirit Airlines flight, departing Sun, Oct 5 from Boston to Louisville, returning Thu, Oct 16, priced at $211 found 1 day ago
Spirit Airlines
Fri, Aug 29 - Sun, Aug 31
BOS
Boston
SDF
Louisville
$212 Roundtrip, just found
$212
Roundtrip
just found
Select Spirit Airlines flight, departing Fri, Aug 29 from Boston to Louisville, returning Sun, Aug 31, priced at $212 just found
American Airlines
Tue, Sep 2 - Sat, Sep 6
BOS
Boston
SDF
Louisville
$213 Roundtrip, found 2 days ago
$213
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Sep 2 from Boston to Louisville, returning Sat, Sep 6, priced at $213 found 2 days ago
American Airlines
Sat, Aug 30 - Tue, Sep 2
BOS
Boston
SDF
Louisville
$217 Roundtrip, just found
$217
Roundtrip
just found
Select American Airlines flight, departing Sat, Aug 30 from Boston to Louisville, returning Tue, Sep 2, priced at $217 just found
Southwest Airlines
Tue, Aug 26 - Sun, Aug 31
BOS
Boston
SDF
Louisville
$218 Roundtrip, found 11 hours ago
$218
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Tue, Aug 26 from Boston to Louisville, returning Sun, Aug 31, priced at $218 found 11 hours ago
American Airlines
Tue, Aug 26 - Sat, Aug 30
BOS
Boston
SDF
Louisville
$220 Roundtrip, found 11 hours ago
$220
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Tue, Aug 26 from Boston to Louisville, returning Sat, Aug 30, priced at $220 found 11 hours ago
United
Sat, Nov 15 - Tue, Nov 18
BOS
Boston
SDF
Louisville
$234 Roundtrip, found 12 hours ago
$234
Roundtrip
found 12 hours ago
Select United flight, departing Sat, Nov 15 from Boston to Louisville, returning Tue, Nov 18, priced at $234 found 12 hours ago
Delta
Sat, Nov 15 - Tue, Nov 18
BOS
Boston
SDF
Louisville
$241 Roundtrip, found 12 hours ago
$241
Roundtrip
found 12 hours ago
Select Delta flight, departing Sat, Nov 15 from Boston to Louisville, returning Tue, Nov 18, priced at $241 found 12 hours ago

Find the cheapest month to fly from Boston (BOS) to Louisville (SDF)

February is typically the cheapest month to fly

From $155 - $351 per traveler.

Graph displaying average flight prices per month

Alternative airports near Louisville

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

Select flight to Louisville Intl. SDF. Cheapest and Closest option available. Average driving time to city center is 9 minutes. Flights from $403
SDF
Louisville Intl.
CheapestClosest
Average driving time to city center9 min
Flights from $403
Flights from Boston (BOS) to Louisville (SDF)
Origin airport
Logan Intl.
Destination airport
Louisville Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$199
Distance
826 mi
Average flight time
2 hours 44 mins

Boston to Louisville Flights

The cheapest times to fly from Boston to Louisville

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

 

The best time to book a flight from Boston to Louisville

Sunday is one of the best days to book for cheap flights from Boston to Louisville: 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 Boston to Louisville

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 Boston to Louisville in 2025. You can also book with separate airlines for your outbound and return journeys, from $100 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 Boston to Louisville 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 Boston to Louisville 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 Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF) cost?
Cheap round-trip flights from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF) start at $261. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Delta flight leaving BOS on August 19 2025 and touching down at SDF. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from BOS to SDF?
The cheapest flights from BOS to SDF are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF)?
Board a nonstop flight with American Airlines and go straight from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF).
What is the cheapest airline that flies from BOS to SDF?
With prices starting from $131 for a one-way journey from BOS to SDF, American Airlines is currently the cheapest carrier operating this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from BOS on October 3 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF)?
On average, just 1 direct flight departs each day from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF). Need other options? Use Expedia's filters to discover flights with layovers and add a new destination to your journey.
What are the most popular departure times for flights from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF)?
The 1 PM departures from BOS to SDF are the top choice for many travelers. They can also be more expensive. If you want to save money, choose a less crowded time to fly.
What day of the week has the most flights from BOS to SDF?
Friday offers the most flights from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF). Consider leaving on this day and you'll have the best chance of finding a departure that works with your plans.
What is the earliest flight from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF)?
The earliest flight leaving from Logan Intl. Airport (BOS) is at around 10:55AM UTC-5. Hop on this flight and you'll land at Louisville Intl. Airport (SDF) at approximately 1:38PM UTC-5. The total time in the air is 2h 43m.
How long does it take to fly from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF)?
Flights from BOS to SDF have an average travel time of 2 hours and 45 minutes. The total distance between these two airports is 830 mi.
What airline has the least delays from BOS to SDF?
With 88% of flights generally arriving on time, American Airlines has the best on-time performance for direct flights from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF). To monitor your flight status and receive notifications if anything changes, use the Expedia App.
What is the best time to fly from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF)?
To touch down at Louisville Intl. Airport (SDF) without delays, pick a flight that leaves Logan Intl. Airport (BOS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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.
What airports do you fly into for Louisville from Logan Intl. Airport (BOS)?
If you're flying on a direct flight from Logan Intl. Airport (BOS) to Louisville, Louisville Intl. Airport (SDF) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF) last-minute?
Booking your flight from BOS to SDF shortly before your journey is usually more expensive. However, if there's some wiggle room with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a BOS to SDF flight and hotel package?
Compared with arranging hotels and flights separately, booking a BOS to SDF flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place will take the hassle out of planning your trip. Just secure your flights and select from our extensive range of stays, then customize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF)?
In most cases, you're able to reschedule or cancel your BOS to SDF flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you want further information, head to our Customer Service portal.

Explore a world of travel with Expedia

Boston nearby Airports

Providence

T.F. Green to Louisville
$195.42

Manchester

Manchester-Boston Regional to Louisville
$236.36

Worcester

Worcester Regional to Louisville
$251.86
*Available to One Key members.