$738 Cheap Flights from Sofia (SOF) to Key West (EYW)

View $738 flight on Sun, Sep 28, 2025Opens in a new window

Popular airlines from Sofia Airport (SOF) to Key West Intl. Airport (EYW)

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Cheap Flights from Sofia to Key West (SOF-EYW)

Prices were available within the past 7 days and start at $738 for one-way flights and $753 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Sun, Sep 28 - Sat, Oct 11
SOF
Sofia
EYW
Key West
$753 Roundtrip, found 22 hours ago
$753
Roundtrip
found 22 hours ago
Select British Airways flight, departing Sun, Sep 28 from Sofia to Key West, returning Sat, Oct 11, priced at $753 found 22 hours ago
British Airways
Sun, Sep 28 - Sat, Oct 11
SOF
Sofia
EYW
Key West
$782 Roundtrip, found 22 hours ago
$782
Roundtrip
found 22 hours ago
Select British Airways flight, departing Sun, Sep 28 from Sofia to Key West, returning Sat, Oct 11, priced at $782 found 22 hours ago
British Airways
Sun, Sep 28 - Fri, Oct 10
SOF
Sofia
EYW
Key West
$787 Roundtrip, found 4 hours ago
$787
Roundtrip
found 4 hours ago
Select British Airways flight, departing Sun, Sep 28 from Sofia to Key West, returning Fri, Oct 10, priced at $787 found 4 hours ago
American Airlines
Sun, Sep 28 - Sat, Oct 11
SOF
Sofia
EYW
Key West
$793 Roundtrip, found 22 hours ago
$793
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Sun, Sep 28 from Sofia to Key West, returning Sat, Oct 11, priced at $793 found 22 hours ago
American Airlines
Sun, Sep 28 - Sat, Oct 11
SOF
Sofia
EYW
Key West
$798 Roundtrip, found 22 hours ago
$798
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Sun, Sep 28 from Sofia to Key West, returning Sat, Oct 11, priced at $798 found 22 hours ago
British Airways
Sun, Sep 28 - Sat, Oct 11
SOF
Sofia
EYW
Key West
$822 Roundtrip, found 22 hours ago
$822
Roundtrip
found 22 hours ago
Select British Airways flight, departing Sun, Sep 28 from Sofia to Key West, returning Sat, Oct 11, priced at $822 found 22 hours ago
American Airlines
Sun, Sep 28 - Sat, Oct 11
SOF
Sofia
EYW
Key West
$827 Roundtrip, found 22 hours ago
$827
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Sun, Sep 28 from Sofia to Key West, returning Sat, Oct 11, priced at $827 found 22 hours ago
United
Sun, Sep 28 - Wed, Oct 8
SOF
Sofia
EYW
Key West
$852 Roundtrip, found 2 days ago
$852
Roundtrip
found 2 days ago
Select United flight, departing Sun, Sep 28 from Sofia to Key West, returning Wed, Oct 8, priced at $852 found 2 days ago
Austrian Airlines
Mon, Sep 29 - Fri, Oct 10
SOF
Sofia
EYW
Key West
$853 Roundtrip, found 4 hours ago
$853
Roundtrip
found 4 hours ago
Select Austrian Airlines flight, departing Mon, Sep 29 from Sofia to Key West, returning Fri, Oct 10, priced at $853 found 4 hours ago
Lufthansa
Sun, Sep 28 - Fri, Oct 10
SOF
Sofia
EYW
Key West
$860 Roundtrip, found 4 hours ago
$860
Roundtrip
found 4 hours ago
Select Lufthansa flight, departing Sun, Sep 28 from Sofia to Key West, returning Fri, Oct 10, priced at $860 found 4 hours ago
Flights from Sofia (SOF) to Key West (EYW)
Origin airport
Sofia
Destination airport
Key West Intl.
Airlines serving
Air France, American Airlines, British Airways, KLM, Qatar Airways, United
Roundtrip price
$752
Distance
5793 mi

Sofia to Key West Flights

The cheapest times to fly from Sofia to Key West

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 Key West are during the month of September. You can find some of the cheapest flights from Sofia to Key West with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sofia to Key West

Sunday is one of the best days to book for cheap flights from Sofia to Key West: 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 Key West

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 Key West in 2025. You can also book with separate airlines for your outbound and return journeys, from $738 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 Key West 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 Key West 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.

 

Frequently asked questions

How much does a flight from Sofia Airport (SOF) to Key West Intl. Airport (EYW) cost?
Discover the latest flight deals from SOF to EYW by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SOF to EYW?
The cheapest flights from SOF to EYW are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SOF to EYW?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SOF to EYW. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Sofia Airport (SOF) to Key West Intl. Airport (EYW)?
You'll need to catch a flight with a layover if you're traveling from Sofia Airport (SOF) to Key West Intl. Airport (EYW). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from SOF to EYW?
You'll typically find Tuesday the quietest day for flights, while Fridays are often 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 Key West Intl. Airport (EYW)?
Opt for a flight from Sofia Airport (SOF) to Key West Intl. Airport (EYW) that leaves before 3 PM to reduce the risk of cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**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 Key West Intl. Airport (EYW) last-minute?
Booking your ticket from SOF to EYW shortly before your trip is typically more expensive. But if there's some wiggle room with your schedule, you could snag a cheap last-minute fare.
Is it cheaper to book a SOF to EYW flight and hotel package?
Compared with arranging flights and hotels separately, booking a SOF to EYW flight and hotel package with Expedia could result in significant savings. What's more, having everything in one convenient place takes the hassle out of travel planning. Simply secure your flights and choose from our wide range of hotels, then tailor your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Sofia Airport (SOF) to Key West Intl. Airport (EYW)?
If you booked your SOF to EYW flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

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*Available to One Key members.