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$112+ Cheap flights from Boston to Louisville (BOS - SDF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SDF
May 1 — May 81
Fri 5/1
Fri 5/8
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Louisville Intl are usually found in August or December, booked 74 days in advance, depart on a Saturday or Sunday and return on a Saturday

Cheap flight deals from Boston to Louisville

Cheapest flights from Boston to Louisville
Explore the most affordable flight options available from Boston to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:55 am
BOS
-
SDF
1 stop13h 03m
Multiple Airlines
Thu 5/72:27 pm
SDF
-
BOS
1 stop20h 39m
Multiple Airlines
Deal found 3/31$353
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/210:41 am
BOS
-
SDF
Nonstop2h 42m
Delta
Tue 5/56:55 am
SDF
-
BOS
1 stop8h 28m
Delta
Deal found 3/31$354
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/93:45 pm
BOS
-
SDF
1 stop4h 40m
Southwest
Tue 6/167:25 am
SDF
-
BOS
1 stop6h 10m
Southwest
Deal found 3/30$355
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/225:45 am
BOS
-
SDF
1 stop14h 35m
Multiple Airlines
Mon 5/259:10 pm
SDF
-
BOS
1 stop26h 44m
Multiple Airlines
Deal found 3/31$356
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:16 pm
BOS
-
SDF
1 stop20h 48m
Spirit Airlines
Thu 4/302:27 pm
SDF
-
BOS
2 stops17h 31m
Spirit Airlines
Deal found 3/31$357
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:55 am
BOS
-
SDF
1 stop11h 09m
Multiple Airlines
Fri 4/247:48 pm
SDF
-
BOS
2 stops36h 10m
Multiple Airlines
Deal found 3/29$358
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:00 am
BOS
-
SDF
2 stops12h 58m
Multiple Airlines
Sun 5/104:13 pm
SDF
-
BOS
1 stop19h 45m
Multiple Airlines
Deal found 3/31$359
This Southwest deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/99:00 am
BOS
-
SDF
2 stops8h 45m
Southwest
Wed 5/133:45 pm
SDF
-
BOS
1 stop3h 55m
Southwest
Deal found 3/31$360
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/255:55 am
BOS
-
SDF
1 stop11h 09m
Spirit Airlines
Thu 4/302:27 pm
SDF
-
BOS
2 stops17h 31m
Spirit Airlines
Deal found 3/31$362
This Mytrip deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:55 am
BOS
-
SDF
1 stop11h 09m
Spirit Airlines
Fri 4/176:06 pm
SDF
-
BOS
1 stop16h 09m
Spirit Airlines
Deal found 3/28$363
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/210:41 am
BOS
-
SDF
Nonstop2h 42m
Delta
Thu 5/71:15 pm
SDF
-
BOS
Nonstop2h 25m
Delta
Deal found 3/31$364
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:25 pm
BOS
-
SDF
1 stop4h 10m
Southwest
Mon 5/185:45 am
SDF
-
BOS
1 stop4h 15m
Southwest
Deal found 3/30$365

Find flight deals from Boston to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Louisville (SDF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$353
(Kiwi.com)

One-way from

$112
(Kiwi.com)

Popular in

November

Cheapest in

August

Average price

$409

Good round-trip deal

$413 or less

Good one-way deal

$288 or less
Provider with most accurate pricing for Boston Logan Intl-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Louisville Intl flights.
Search Deals
From Boston Logan Intl to Louisville Intl
Search Deals
One-way flight from Boston Logan Intl to Louisville Intl
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to Louisville Intl.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to Louisville Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Louisville that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 1, 2026.
Use the filters below to find and compare flights from Boston to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Thu 6/4

5:25 am-10:05 am

1 stop4h 40m

Louisville Intl

Sat 6/6

5:15 pm-11:35 pm

1 stop6h 20m

$365

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Mon 5/11

7:10 am-3:00 pm

1 stop7h 50m

Louisville Intl

Wed 5/13

3:30 pm-10:20 pm

2 stops6h 50m

$370
Quickest round-trip

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Fri 7/10

5:45 am-10:23 am

1 stop4h 38m

Louisville Intl

Tue 7/14

6:00 am-10:20 am

1 stop4h 20m

$384

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Thu 5/14

1:20 pm-10:10 pm

2 stops8h 50m

Louisville Intl

Sun 5/17

5:50 am-9:55 am

1 stop4h 05m

$437

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Tue 6/9

5:45 am-4:49 pm

2 stops11h 04m

Louisville Intl

Sat 6/13

5:46 pm-11:16 pm

1 stop5h 30m

$440

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Sat 8/15

11:00 am-8:36 pm

2 stops9h 36m

Louisville Intl

Tue 8/18

5:35 am-12:47 pm

2 stops7h 12m

$445

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Thu 4/16

7:10 am-3:00 pm

1 stop7h 50m

Louisville Intl

Tue 4/21

3:45 pm-7:40 pm

1 stop3h 55m

$452

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Fri 5/15

5:28 pm-10:22 pm

1 stop4h 54m

Louisville Intl

Tue 5/19

2:00 pm-11:59 pm

2 stops9h 59m

$469
Cheapest one-way

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Sun 5/3

5:55 am-9:28 am

1 stop27h 33m

$137

BostonLouisville

BOS - SDF

BOSSDF

Boston Logan Intl

Tue 4/28

7:20 am-3:05 pm

1 stop7h 45m

$178

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Boston to Louisville

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Louisville in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Louisville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Louisville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Louisville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Louisville flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Louisville flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Louisville

How far ahead should I book a flight from Boston to Louisville?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Louisville. Price data was last updated on March 13, 2026.

The price you pay for your flight from Boston to Louisville may vary depending on when you book. For the best chance of a lower fare, look to book 74 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Boston to Louisville?

Currently, May is the cheapest month in which you can book a flight from Boston to Louisville (average of $86). Flying from Boston to Louisville in March is currently the most expensive (average of $273). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to SDF?

Find hourly flight availability from Boston to Louisville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 1, 2026.

When flying from Boston to Louisville, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Boston to Louisville?

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Louisville. Reviews last updated April 1, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Boston to Louisville by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,335 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,335 reviews
Southwest
8.0
Very good
4,335 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,368 reviews
Southwest
8.0
Very good
4,335 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,529 reviews
Southwest
8.0
Very good
4,335 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,544 reviews
Southwest
8.0
Very good
4,335 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Boston to Louisville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Boston to Louisville?

    You will need to book a flight from Boston Logan Intl to Louisville Intl if you want to fly from Boston to Louisville. At least 4 different airlines have flights from Logan Intl (BOS) to Louisville Intl (SDF) on a regular basis. There is 1 flight to Louisville from the Boston airport per day. If you manage to book one that is nonstop, then you can expect the flight time from BOS to SDF to be around 2h 38m.

  • How popular is this Boston to Louisville flight route?

    The Boston Logan Intl to Louisville Intl flight path was viewed by 4 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Boston to Louisville?

    There are many flights that can get you from Boston to Louisville in 4h 38m. Fly via Southwest or United Airlines to get the fastest option. Boston and Louisville are separated by a distance of 827 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Boston to Louisville round-trip?

    Delta, at $265, was found to be the cheapest airline from Boston to Louisville.Alternate airlines to your destination round-trip include American Airlines and Southwest. Delta is priced at 33% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Boston to Louisville one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $130. American Airlines flights start at $143 while deals on Southwest start at $144 one-way.

  • What are the most reliable airlines from Boston to Louisville?

    The top 3 most reliable airlines when flying from Boston to Louisville are Delta (85%), Republic Airways (83%) and Envoy Air (83%).

  • What are the cheapest flights from Boston to Louisville?

    Looking at all options, your cheapest flight can be booked for $278. While the most popular route (Boston Logan Intl - Louisville Intl) can be booked for $276 on average, our data indicates $426 when flying from Boston to Louisville.

  • Can I find deals for flights from Boston to Louisville that include hotel bookings?

    Yes. In addition to deals on Boston to Louisville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Louisville?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Louisville.

  • Can I find deals for business class flights from Boston to Louisville?

    Yes. Cheapflights offers flight deals from Boston to Louisville by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Louisville?

    Currently, May is the cheapest month in which you can book a flight from Boston to Louisville (average of $86). Flying from Boston to Louisville in March is currently the most expensive (average of $273). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
Bardstown

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Top 4 airlines flying from Boston to Louisville

Discover the top 4 airlines that operate flights from Boston to Louisville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$265Average$411FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$406FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$318Average$402FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$349Average$419FlexibilityNo cancel feeOn-time69%

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