$387 Cheap Flights from Sofia (SOF) to Boston (BOS)

View $387 flight on Wed, Jun 24, 2026Opens in a new window

Popular airlines from Sofia Airport (SOF) to Logan International Airport (BOS)

Cheap Flights from Sofia to Boston (SOF-BOS)

Prices were available within the past 7 days and start at $387 for one-way flights and $641 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Sun, Jan 25 - Tue, Feb 24
SOF
Sofia
BOS
Boston
$641 Roundtrip, found 2 days ago
$641
Roundtrip
found 2 days ago
Select British Airways flight, departing Sun, Jan 25 from Sofia to Boston, returning Tue, Feb 24, priced at $641 found 2 days ago
British Airways
Fri, Jun 19 - Sat, Jun 27
SOF
Sofia
BOS
Boston
$641 Roundtrip, found 3 days ago
$641
Roundtrip
found 3 days ago
Select British Airways flight, departing Fri, Jun 19 from Sofia to Boston, returning Sat, Jun 27, priced at $641 found 3 days ago
British Airways
Wed, Jan 14 - Tue, Feb 24
SOF
Sofia
BOS
Boston
$643 Roundtrip, found 5 days ago
$643
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Jan 14 from Sofia to Boston, returning Tue, Feb 24, priced at $643 found 5 days ago
ITA Airways
Mon, Apr 20 - Tue, Jul 7
SOF
Sofia
BOS
Boston
$654 Roundtrip, found 5 days ago
$654
Roundtrip
found 5 days ago
Select ITA Airways flight, departing Mon, Apr 20 from Sofia to Boston, returning Tue, Jul 7, priced at $654 found 5 days ago
British Airways
Wed, Jan 14 - Tue, Feb 24
SOF
Sofia
BOS
Boston
$658 Roundtrip, found 5 days ago
$658
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Jan 14 from Sofia to Boston, returning Tue, Feb 24, priced at $658 found 5 days ago
Lufthansa
Thu, Nov 13 - Thu, Nov 27
SOF
Sofia
BOS
Boston
$662 Roundtrip, found 1 day ago
$662
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Thu, Nov 13 from Sofia to Boston, returning Thu, Nov 27, priced at $662 found 1 day ago
Air Canada
Tue, Jan 20 - Wed, Jan 28
SOF
Sofia
BOS
Boston
$664 Roundtrip, found 2 days ago
$664
Roundtrip
found 2 days ago
Select Air Canada flight, departing Tue, Jan 20 from Sofia to Boston, returning Wed, Jan 28, priced at $664 found 2 days ago
Lufthansa
Fri, Aug 21 - Mon, Aug 31
SOF
Sofia
BOS
Boston
$664 Roundtrip, found 21 hours ago
$664
Roundtrip
found 21 hours ago
Select Lufthansa flight, departing Fri, Aug 21 from Sofia to Boston, returning Mon, Aug 31, priced at $664 found 21 hours ago
Lufthansa
Thu, Dec 4 - Sun, Mar 15
SOF
Sofia
BOS
Boston
$665 Roundtrip, just found
$665
Roundtrip
just found
Select Lufthansa flight, departing Thu, Dec 4 from Sofia to Boston, returning Sun, Mar 15, priced at $665 just found
Austrian Airlines
Thu, Dec 4 - Sun, Mar 15
SOF
Sofia
BOS
Boston
$681 Roundtrip, just found
$681
Roundtrip
just found
Select Austrian Airlines flight, departing Thu, Dec 4 from Sofia to Boston, returning Sun, Mar 15, priced at $681 just found

Frequently asked questions

How much does a flight from Sofia Airport (SOF) to Logan Intl. Airport (BOS) cost?
Lock in a cheap one-way flight from $387 or cheap return flight from $641 from Sofia Airport (SOF) to Logan Intl. Airport (BOS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Sofia Airport (SOF) to Logan Intl. Airport (BOS)?
Planning your getaway for January is a good way to save, as it's the cheapest month for flights between SOF and BOS. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Sofia Airport (SOF) to Logan Intl. Airport (BOS)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll take you from SOF to BOS. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Sofia Airport (SOF) to Logan Intl. Airport (BOS)?
Nonstop flights from Sofia Airport (SOF) to Logan Intl. Airport (BOS) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SOF to BOS?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the time of year, carrier and other factors.*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 Logan Intl. Airport (BOS)?
Opt for a flight from Sofia Airport (SOF) to Logan Intl. Airport (BOS) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this time 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 Logan Intl. Airport (BOS) last-minute?
Last-minute fares from SOF to BOS are typically more expensive. For the cheapest rates, start searching for flights as early as possible. That being said, if you're flexible with your travel dates, you may find a cheap ticket right before your journey.
Is it cheaper to book a SOF to BOS flight and hotel package?
Securing a SOF to BOS flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our extensive range of stays and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sofia Airport (SOF) to Logan Intl. Airport (BOS)?
If you reserved your SOF to BOS flight within the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you purchased, 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.

Travel information

Origin airport
Sofia
Destination airport
Logan Intl.
Airlines serving
Air Canada, Air France, Air Serbia, Austrian Airlines, British Airways, Emirates, Iberia, KLM, LOT-Polish Airlines, Lufthansa, Qatar Airways, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$640
Distance
4523 mi

Book with confidence

Sofia to Boston Flights

The cheapest times to fly from Sofia to Boston

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

 

The best time to book a flight from Sofia to Boston

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

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 Boston in 2025. You can also book with separate airlines for your outbound and return journeys, from $387 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 Boston 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 Boston 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 Boston Flights

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*Available to One Key members.