$584 Find Cheap Flights from Boston to Sofia - Compare and Save

Three cabin classes are available on flights from Boston to Sofia:

• Economy Class
• Premium Economy Class
• Business Class

A nonstop flight from Boston to Sofia takes 00m, covering 4,521 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Round-trip flights from Boston to Sofia range from $499 to $976, with an average of $746 over the past 12 months. Anything below $499 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 8% above the $746 route average. Book 20 weeks before departure for the lowest fares.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $584 to $3,997. That means the highest observed fare was about 7x higher than the lowest one.

Sofia Airport (SOF) hosts 5 major car rental companies, with daily rates averaging $21 for economy cars. Top options include:

• MEXRENTACAR
• NU Car
• Top Rent a Car - Bulgaria
• Priceless
• Easyrent

Flights from Boston to Sofia usually depart from Boston Logan Intl (BOS) and arrive at Sofia (SOF).

One-stop flights from Boston to Sofia most commonly connect through:

• Amsterdam Schiphol (AMS) - 22% of one-stop connections
• Istanbul (IST) - 20% of one-stop connections
• Frankfurt am Main (FRA) - 15% of one-stop connections
• Munich Franz Josef Strauss (MUC) - 10% of one-stop connections

Yes. Flexible dates can save you up to 32% on flights from Boston to Sofia. Monday is the cheapest departure day at $663 round-trip on average, while Thursday is the most expensive at $973, a difference of $310.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Flying via Vienna Intl (VIE) gives the shortest average 1-stop total travel time at 12h 09m, compared with 13h via Amsterdam Schiphol (AMS) and 13h 04m via Frankfurt am Main (FRA).

Sofia is 6 hours ahead of Boston (Eastern European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Sofia are Vasil Levski National Stadium, National Palace of Culture and Central Sofia Market Hall. These are among the most viewed places in Sofia on KAYAK.

Your layover will automatically depend on the airline you’re traveling with because each airline on this route has its preferred airport for layovers. For example, Turkish Airlines has all its layovers on this route scheduled for Istanbul. Similarly, Lufthansa has its layovers scheduled for Frankfurt or Munich while SWISS Airlines is scheduled for Zurich.

As it stands, U.S. citizens traveling to Bulgaria are not required to carry visas on entry as long as they are traveling on a regular passport and don’t plan on staying for longer than 90 days. In fact, the only mandatory requirement is your passport, with a validity of at least three months beyond the departure date from Bulgaria and one blank page for entry stamps.

Access to the city center from Sofia Airport is possible through a range of options including bus, metro, and taxi. Taking a taxi is the most convenient although the bus and metro offer an affordable option. The metro in particular is a faster option and typically operates round the clock at intervals of fifteen minutes. To catch the metro, head over to the Airport Metro Station located in Terminal 2 and take the Metro line M2, which leads directly to the city center station Serdika.

In these modern times, it is pivotal that we think about the environment. While flying is by no means a sustainable way to travel, there are measures we can take to make our trips more sustainable, and it starts with using a sustainable airline. Lufthansa and American Airlines are a few of the airlines serving this route that have already adopted the use of Sustainable Aviation Fuel.