$437 Cheap Flights from Sofia (SOF) to Louisville (SDF)

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Popular airlines from Sofia Airport (SOF) to Louisville Intl. Airport (SDF)

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Cheap Flights from Sofia to Louisville (SOF-SDF)

Prices were available within the past 7 days and start at $437 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Sofia Airport (SOF) to Louisville Intl. Airport (SDF) cost?
Lock in a cheap one-way flight from $437 or cheap return flight from Sofia Airport (SOF) to Louisville Intl. Airport (SDF) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Sofia Airport (SOF) to Louisville Intl. Airport (SDF)?
is the cheapest month to fly from SOF to SDF. Avoiding peak travel times is often the key to finding a great deal.
What is the cheapest airline that flies from Sofia Airport (SOF) to Louisville Intl. Airport (SDF)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SOF to SDF flight.
How many flights per day from Sofia Airport (SOF) to Louisville Intl. Airport (SDF)?
Nonstop flights from Sofia Airport (SOF) to Louisville Intl. Airport (SDF) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SOF to SDF?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sofia Airport (SOF) to Louisville Intl. Airport (SDF)?
To avoid possible delays on the Sofia Airport (SOF) to Louisville Intl. Airport (SDF) route, aim to travel before 3 PM. Departures after this hour are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Sofia Airport (SOF) to Louisville Intl. Airport (SDF) last-minute?
Booking your flight from SOF to SDF right before your getaway is usually more expensive. But if you're flexible with your travel dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a SOF to SDF flight and hotel package?
You'll typically save money by booking a SOF to SDF flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After choosing your ideal flights and accommodations, consider adding extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Sofia Airport (SOF) to Louisville Intl. Airport (SDF)?
It's generally possible to cancel or reschedule your SOF to SDF flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Sofia
Destination airport
Louisville Intl.
Distance
5300 mi

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Sofia to Louisville Flights

The cheapest times to fly from Sofia to Louisville

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sofia to Louisville are during the month of . You can find some of the cheapest flights from Sofia to Louisville with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sofia to Louisville

Sunday is one of the best days to book for cheap flights from Sofia to Louisville: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sofia to Louisville

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sofia to Louisville in 2025. You can also book with separate airlines for your outbound and return journeys, from $437 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sofia to Louisville flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sofia to Louisville airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Sofia to Louisville Flights

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*Available to One Key members.