£91 Cheap Flights from San Francisco (SFO) to Louisville (SDF)

To find a cheap flight from San Francisco, CA (SFO-San Francisco Intl.) to Louisville, KY (SDF-Louisville Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best airline to fly with from San Francisco, CA (SFO-San Francisco Intl.) to Louisville, KY (SDF-Louisville Intl.) will differ from traveller to traveller. If you like to fly early, Breeze offers early morning flights. If price is the most important factor, Breeze typically offers the lowest fares. United Airlines offers the most daily flights from San Francisco, CA (SFO-San Francisco Intl.) to Louisville, KY (SDF-Louisville Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.

You'll typically find the most flights from San Francisco International Airport (SFO) to Louisville International Airport (SDF) on a Friday, with around 58 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include United Airlines, American Airlines, and Delta Air Lines. Flight schedules are fairly consistent throughout the week, with Fridays offering only slightly more options than other days.

The most popular departure times for flights from San Francisco, CA (SFO-San Francisco Intl.) to Louisville, KY (SDF-Louisville Intl.) are in the early morning, from 6am to 9am. About 26% of passengers prefer this time. Many major carriers, including American Airlines, United Airlines and Delta Air Lines, offer flights during this window. This timing works well because it allows you to get an early start on your travel day and arrive at your destination with plenty of time.

It's easy to earn miles on a San Francisco, CA (SFO-San Francisco Intl.) to Louisville, KY (SDF-Louisville Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you booked your San Francisco, CA (SFO-San Francisco Intl.) to Louisville, KY (SDF-Louisville Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.