Cheap American Airlines flights Boston (BOS) to Louisville (SDF)

Apply the "Price (lowest to highest)" filter on Expedia to look for cheap American Airlines round-trip flights from BOS to SDF. Affordable one-way fares are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

To find cheap American Airlines fares from Logan Intl. Airport (BOS) to Louisville Intl. Airport (SDF), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect what you pay. Sunday is generally the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

The earliest American Airlines flight from BOS to SDF departs at 1:35PM UTC-5, touching down at 4:22PM UTC-5. If you prefer to set off later, the last American Airlines flight leaves BOS at 1:35PM UTC-5 and lands at SDF at 4:22PM UTC-5. Flying before midday is often a smart option as morning and mid-morning flights are less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.