BOS - SDF

$134 Find Cheap Flights from Boston to Louisville - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Louisville departing on 8/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$277
Typical prices: $357-$522
American Airlines
Tue 8/18Sat 8/22
BOS - SDF • 1 stop
Cheapest non-stop
$297
Typical prices: $355-$479
American Airlines
Sat 8/15Wed 8/26
BOS - SDF • Non-stop
Top airlines
Cheapest • from $277 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with American Airlines and Delta. Average duration is 2h 39m
Direct flights
Direct flights
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Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $440 (round-trip)
Shortest trip • 4h 32m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 6% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 15% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Boston to Louisville (BOS-SDF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Louisville that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Louisville

Tue, Aug 18 - Sat, Aug 22
American Airlines Logo
6:00 am - 2:51 pm
BOS
-
SDF
8h 51m
1 stop
American Airlines Logo
6:08 am - 4:42 pm
SDF
-
BOS
10h 34m
1 stop
$277American Airlines
Sat, Aug 22 - Sat, Aug 29
American Airlines Logo
8:00 am - 5:55 pm
BOS
-
SDF
9h 55m
1 stop
American Airlines Logo
6:08 am - 4:42 pm
SDF
-
BOS
10h 34m
1 stop
$277American Airlines
Sun, Aug 23 - Wed, Aug 26
Multiple Airlines Logo
9:36 am - 9:49 am
BOS
-
SDF
24h 13m
2 stops
Multiple Airlines Logo
2:56 pm - 11:50 am
SDF
-
BOS
20h 54m
1 stop
$277Multiple Airlines
Sun, Nov 8 - Fri, Nov 13
Allegiant Air Logo
12:34 pm - 6:03 pm
BOS
-
SDF
29h 29m
1 stop
Allegiant Air Logo
8:54 pm - 9:29 am
SDF
-
BOS
12h 35m
1 stop
$297Allegiant Air
Fri, Sep 11 - Fri, Sep 18
Southwest Logo
5:50 am - 10:00 am
BOS
-
SDF
4h 10m
1 stop
Southwest Logo
3:20 pm - 10:25 pm
SDF
-
BOS
7h 05m
1 stop
$317Southwest
Thu, Nov 19 - Mon, Nov 23
Southwest Logo
3:35 pm - 10:10 pm
BOS
-
SDF
6h 35m
1 stop
Southwest Logo
5:35 pm - 11:40 pm
SDF
-
BOS
6h 05m
1 stop
$321Southwest
Tue, Sep 8 - Tue, Sep 15
Delta Logo
9:25 am - 11:59 am
BOS
-
SDF
2h 34mnonstop
Delta Logo
12:39 pm - 3:20 pm
SDF
-
BOS
2h 41mnonstop
$362Delta
Mon, Sep 7 - Tue, Sep 15
Delta Logo
9:30 am - 12:12 pm
BOS
-
SDF
2h 42mnonstop
Delta Logo
12:39 pm - 3:20 pm
SDF
-
BOS
2h 41mnonstop
$362Delta
Wed, Sep 2 - Sat, Sep 5
United Airlines Logo
12:41 pm - 7:15 pm
BOS
-
SDF
6h 34m
2 stops
United Airlines Logo
9:00 am - 2:07 pm
SDF
-
BOS
5h 07m
1 stop
$387United Airlines
Wed, Sep 16 - Mon, Sep 21
United Airlines Logo
5:45 am - 10:18 am
BOS
-
SDF
4h 33m
1 stop
United Airlines Logo
1:08 pm - 5:52 pm
SDF
-
BOS
4h 44m
1 stop
$401United Airlines
Booking Insights

KAYAK's insights & trends for Boston to Louisville flights

Get data-powered insights and trends into flights from Boston to Louisville to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Boston to Louisville?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boston to Louisville departing in September.

Flight prices are below average for this route right now.

Flights to Louisville from Boston usually cost between $357 and $522 in September.
The lowest price found in the past 5 days was $277 on American Airlines (Sep 5-Sep 8).

What’s the cheapest day of the week to fly from Boston to Louisville?

The average price of all round-trip flights from Boston to Louisville clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Louisville on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Boston to Louisville. For your return ticket, we recommend flying on a Saturday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Boston to Louisville?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Louisville, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Louisville is December, where tickets cost $386 (return) on average. On the other hand, the most expensive months are April and June, where the average cost of round-trip tickets is $532 and $511 respectively.

Can I save money by flying with a layover from Boston to Louisville?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $513, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to Louisville, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to Louisville, you should book around 3 weeks before departure, which saves you about 6% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Expert advice

Expert advice for your flight from Boston to Louisville

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Low season

January

Cheapest flight

$134
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 17% increase in price.
Flight from Boston to Louisville

When to book flights from Boston to Louisville

Are your dates flexible? Find out the best times to travel from Boston to Louisville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boston to Louisville

  • Which form of transportation from Boston's city center to Boston Logan International Airport will cost travelers the least money?

    The most affordable option is usually taking the subway and bus operated by the Massachusetts Bay Transportation Authority (MBTA). The Blue Line subway connects downtown Boston to the airport, and you can transfer to the free Silver Line SL1 bus at the Airport Station. The cost of an MBTA subway or bus fare is typically lower than other modes of transportation.

  • Which airline routes offer the cheapest flight options between Boston (BOS) and Louisville (SDF)?

    For travelers on a tight budget, a connecting flight from Boston to Louisville may be less expensive than a direct ticket. Many airlines, including American Airlines, Delta Air Lines, Southwest Airlines, and United Airlines, offer connecting flights on this route. These airlines' respective layover cities are Dallas, Detroit, Nashville, or Chicago.

  • Which airlines operate flights from Louisville to Boston that accept pets?

    Pets are allowed on board a variety of carriers when flying from Boston to Louisville, including American, Delta Air Lines, Southwest Airlines, and United Airlines. It is advisable to buy your ticket as soon as you can, though, as each aircraft only accepts a certain number of animals. Your pet should not weigh more than 20 lbs overall in the carrier. The pet carrier will also be regarded as a carry-on item. These airlines allow just a single animal per traveler, except in certain circumstances.

  • Which airlines provide reasonable luggage policies on flights from Boston (BOS) to Louisville (SDF)?

    For flights leaving from Boston to Louisville, a number of carriers, including Delta Air Lines, Southwest Airlines, and United Airlines, have loosened their baggage restrictions. These airlines stand out for not charging customers for carry-on bags up to 22 lbs. In addition, they provide discounted pricing for checked bags weighing under fifty pounds.

  • What is the cheapest flight from Boston to Louisville?

    In the last 5 days, the lowest price for a flight from Boston to Louisville was $134 for a one-way ticket and $277 for a round-trip.

  • Do I need a passport to fly between Boston and Louisville?

    No, a passport isn't needed to fly from Boston to Louisville. However, local authorities might ask for an official ID.

  • Which airlines offer Wi-Fi service onboard planes from Boston to Louisville?

    Delta, American Airlines, and JetBlue offer inflight Wi-Fi service on the Boston to Louisville flight route.

  • Which aircraft models fly most regularly from Boston to Louisville?

    The Embraer 175 is the aircraft model that flies most regularly on the Boston to Louisville flight route.

  • Which airline alliances offer flights from Boston to Louisville?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Boston and Louisville, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Boston to Louisville?

    There are nonstop flights from Boston to Louisville on a daily basis.

  • Which is the best airline for flights from Boston to Louisville, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Boston to Louisville are Southwest and Delta. With an average price for the route of $510 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $474 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Boston to Louisville?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Louisville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Louisville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Louisville from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Louisville?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Louisville with an airline and back to Boston with another airline. Booking your flights between Boston and SDF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Louisville?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Louisville from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Boston to Louisville

  • Looking for a cheap flight? 25% of our users found flights on this route for $288 or less one-way and $445 or less round-trip.
  • When flying from Boston (BOS) to Louisville, the vast majority of business travelers opt to arrive via Louisville Muhammad Ali International Airport (SDF). This is because SDF airport offers various ground transportation options, including taxis, rideshares, rental cars, and public transportation. This accessibility makes it convenient for business travelers to reach their final destinations or attend meetings smoothly.
  • Consider using American Airlines, Delta Air Lines, Southwest Airlines, or United Airlines if you want an enhanced journey from Boston to Louisville. When making reservations or checking in with these airlines, customers can use a particular bidding procedure to ask for an upgrade from their initial class, like business or economy.
  • Consider flying with American Airlines, Delta Air Lines, Southwest Airlines, or United Airlines if you want entertainment on your trip from Boston to Louisville. The free in-flight Wi-Fi is available to customers flying with one of these airlines, and they can use it to stream live their preferred TV shows, and children's cartoons, or listen to their favorite music.
  • When flying from Boston to Louisville (SDF), the majority of ecologically conscious passengers prefer to depart via Boston Logan International Airport (BOS). This preference is a result of the great advancements the airport has made in the usage of renewable energy sources. Solar panel arrays have been installed by the BOS to generate clean electricity. BOS has also installed geothermal energy systems for heating and cooling to lessen its dependency on fossil fuels.
  • If you want to travel from Boston to Louisville in the morning, you might want to think about staying the night close to BOS Airport. Due to its proximity to BOS Airport, the Hilton Boston Logan Airport makes for a convenient overnight lodging option. All hotel guests are also entitled to a free breakfast.

Prefer to fly direct from Boston to Louisville?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Boston Logan Intl to Louisville Intl.
Find which airlines fly direct from Boston Logan Intl Airport to Louisville Intl Airport, which days they fly and book direct flights.

Direct departures

Boston Logan Intl to Louisville Intl

Monday

American Airlines,Delta

American Airlines,Delta

Tuesday

American Airlines,Delta

American Airlines,Delta

Wednesday

American Airlines,Delta

American Airlines,Delta

Thursday

American Airlines,Delta

American Airlines,Delta

Friday

American Airlines,Delta

American Airlines,Delta

Saturday

American Airlines,Delta

American Airlines,Delta

Sunday

American Airlines,Delta

American Airlines,Delta

See more direct flights

Direct returns

Louisville Intl to Boston Logan Intl

Monday

American Airlines,Delta

American Airlines,Delta

Tuesday

American Airlines,Delta

American Airlines,Delta

Wednesday

American Airlines,Delta

American Airlines,Delta

Thursday

American Airlines,Delta

American Airlines,Delta

Friday

American Airlines,Delta

American Airlines,Delta

Saturday

American Airlines,Delta

American Airlines,Delta

Sunday

American Airlines,Delta

American Airlines,Delta

See more direct flights

Reviews of the top 4 airlines serving from Boston to Louisville

 
See real verified KAYAK customer reviews for airlines flying from Boston to Louisville. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Louisville? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4228 reviews
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
8.0Comfort
Airline reviews

No wifi, seems to be very common with Southwest currently. Everything else was normal.

8.0 ExcellentSean, Jul 2026
HOU - LGB
Read more Southwest reviews

No wifi, seems to be very common with Southwest currently. Everything else was normal.

Poor customer service, no accommodation for passengers when the flight was delayed over 5 hours.

Friendly crew kept coming by to make sure all was ok, provide additional refreshments, etc.

It was good. Last flight was delayed but I always say that is in God's plan

Red eye from San Diego. Temperature of the cabin was way too warm and the air duct flowed very little air.

WiFi was not working and didn’t have a beverage service

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

Flights delayed by 4-6 hours. Boarding was a mess and unclear. Bags were not at arrival airport and had never even been put on the plane. No idea when I’ll get them. Don’t fly into Denver!

The seats were a bit cramped and worn, but otherwise okay.

Since the flight wasn’t full, we had some extra room. Crew was great

Flight from Savannah arrived very late and we did not take off till 2 hours after scheduled departure!

It is usually very pleasant. Good service for the price, international flights are even better

Flight attendant was very poor in taking care or showing attention. I slept up front for a few and missed the snacks. She saw me many times, went by me many times and never once asked if I needed anything. The whole 2 hours flight. And this is to a Diamond member in first.

I thought the service was very nice and pleasant. There were no hiccups and no issues so overall a good experience.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

The baggage belt was not updated on the Delta App and was displayed on the wrong belt board. Was not expecting this to happen.

The plan was delayed and left DC 90 minutes late. However, it showed a 20 minute delay on the delta app, then a 12 min delay. It turned out to be an hour delay. I found out where the plane was with flightaware. Stop keeping customers in the dark about what is going on.

Pilots lied about waiting on “paperwork”. Sat in the plane for over an hour, waiting on some papers to be printed according to the pilot and then all of a sudden he says good news maintenance is finally on their way. Maybe they can fix it before we get our paperwork. Ended up missing my connection in LaGuardia and as a result, had a fly home to Lexington instead of the Louisville airport. Then paid $100 to uber to Louisville since it was midnight by the time I got in. I wish they would just be transparent with passengers sometimes and not try to beat around the bush on why things are delayed.

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

I would have preferred a flight voucher and to hop on a different flight. Delayed over 6 hours.

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

The flight was delayed, they didn’t even have water for the toilets or for drinks

It’s always a great time flying with united airlines.

Very old flight - time to retire it for newer airplanes

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

They have overselled the ticket and kicked me out from boarding, All my Plans were collapsed and important network meeting missed.also I booked direct flight i have to go through an 1 stop and it was frustrated.

Horrific. We were delayed due a flight attendant stuck in traffic en route to the airport. Over 100 people were then stuck in Charolette. Then I ran to make my layover only to find that my connection didn’t have a plane anymore. Waited 2.5 hours without any updates. On the flight we had to beg for even a pretzel option.

Terrible boarding and first class experience. Nice staff but overall disorganized, dirty plane.

The flight was delayed significantly and we sat on runway after landing for awhile. Best thing was the flight attendant, Jenny, in first class, who was very professional and attentive. She was excellent - the rest of the flight was not.

The gate got changed several times and the flight was delayed over an hour. Awful experience

It was an older plane. First Class was not especially roomy or comfortable. It was a short flight so there were no meal but they did offer mixed nuts which used to be normal but now is rare. Crew member was very polite and professional.

No Snacks or Entertainment. The flight was short, snacks should still be given.

Everything was fine. Flight boarded and departed on time. Seating was spacious enough for my carryon to fit under the seat in front of me. No complaints at all. Flight even arrived early.

Boston ticket agent Cheryl Porter is WONDERFUL. Our Iberia flight to Barcelona was cancelled the morning we were scheduled to leave and Cheryl was our super hero - she found us seats on a flight to London and on to Barcelona. Truly a “can-do” attitude which we appreciated so much after the Iberia ticket agents told us there was “absolutely nothing they could do”. (As did the customer service agents at Iberia’s call center) Ms Porter is truly a wonderful person who genuinely cares about travelers!

Nothing wrong on this flight but nothing special. It was oversold and they had to bump people which is always bad.

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

Information on your arrival and departure airports