$219 Cheap Alaska Airlines flights Seattle (SEA) to Louisville (SDF)

Finding cheap one-way Alaska Airlines flights from SEA to SDF from $219 on Expedia is a breeze — just filter by “Price (lowest to highest).” Or check out our budget-friendly round-trip fares from $397 for your next exciting adventure.**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.

Alaska Airlines flights to Louisville are often cheaper in the low-season months of January and December. Whether you’re in search of a return or one-way ticket, you could score a better deal then.

Search for cheap Alaska Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Louisville Intl. Airport (SDF) one to three months ahead of your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and journey, the best day to book a domestic flight is usually Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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.

Simply enter your dates, click search and select “Nonstop” on Expedia to find any direct flights from SEA to SDF with Alaska Airlines or other carriers.

Find Alaska Airlines’s earliest flights from SEA to SDF by using our “Early Morning” and “Morning” filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer 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.

Alaska Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Louisville arrive at Louisville Intl. Airport (SDF). This is the main gateway to this destination.

Alaska Airlines makes traveling from SEA to SDF more enjoyable with an excellent in-flight experience and a rewarding loyalty program. You also have the chance to earn points with Mileage Plan. Be sure to join our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the ticket type you purchased, a fee will generally apply if you modify or cancel your flight more than 24 hours after it’s been confirmed. To find flexible plane tickets, select our “Changes included” or “No cancel fee” filter when looking for flights. For more details on modifying or canceling your reservation, go to “Trips,” select your flight and tick “Manage Booking.”