Boston (BOS) → Sofia (SOF)

7,280 km
9h 36m flight
From $850
Sofia destination photo

About Boston to Sofia Flights

Discover the best flights from Boston to Sofia, covering 7,280 km in approximately 9h 36m. Boston (BOS) to Sofia (SOF) is one of the major long-haul routes connecting United States and Bulgaria. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Boston to Sofia.

12-Month Price History

Flight prices from Boston to Sofia vary significantly throughout the year. February typically offers the best deals with average prices around $1323, while July sees the highest prices, averaging $2199. Savvy travelers can save up to 40% by choosing their travel dates wisely.

Best Time to Fly

Cheapest Month

February

Save up to 40% on average

Most Expensive

July

Peak season pricing

Book in Advance

89 days

For best prices

Booking Tips

For the best prices on Boston to Sofia flights, we recommend booking 156 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.

Airlines Serving This Route

JetBlue Airways

B6

Economy

$1680

Business

$4160

First

-

American Airlines

AA

Economy

$1990

Business

$6630

First

$13910

Air France

AF

Economy

$2090

Business

$8950

First

$13350

Delta Air Lines

DL

Economy

$2400

Business

$8030

First

$11750

United Airlines

UA

Economy

$2480

Business

$7330

First

$10920

Bulgaria Air

FB

Economy

$2510

Business

$8640

First

$11530

British Airways

BA

Economy

$2730

Business

$8430

First

$14720

Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.

Alternative Flight Options

Sofia destination photo

HartfordSofia

Bradley International (BDL) to Sofia (SOF)

Distance: 7,420 km

Average price: $1577

View this route →
Sofia destination photo

PortlandSofia

Portland International Jetport (PWM) to Sofia (SOF)

Distance: 7,151 km

Average price: $1524

View this route →
Skopje destination photo

BostonSkopje

Logan International (BOS) to Skopje International (SKP)

Distance: 7,208 km

Average price: $1536

View this route →
Pristina destination photo

BostonPristina

Logan International (BOS) to Pristina International (PRN)

Distance: 7,130 km

Average price: $1520

View this route →

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Frequently Asked Questions

How long is the flight from Boston to Sofia?

The flight time from Boston (BOS) to Sofia (SOF) is approximately 9 hours and 36 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.

What is the distance between Boston and Sofia?

The aerial distance between Boston and Sofia is 7,280 kilometers (4,524 miles). This is the straight-line distance, which is used to calculate flight times.

Which airlines fly from Boston to Sofia?

Several airlines operate flights between Boston and Sofia, including Delta Air Lines, JetBlue Airways, Bulgaria Air and 4 more airlines. Most flights on this route include one or more stops.

What is the cheapest month to fly from Boston to Sofia?

Based on historical data, February typically offers the lowest airfares for flights from Boston to Sofia. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.

How far in advance should I book my flight to Sofia?

For the best prices on Boston to Sofia flights, we recommend booking 154 days in advance. International flights generally require earlier booking than domestic routes.

Do I need a visa to travel from Boston to Sofia?

Visa requirements depend on your nationality and the purpose of your visit. Citizens of United States traveling to Bulgaria should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.

What is the time difference between Boston and Sofia?

Boston operates on America/New_York time zone, while Sofia is in the Europe/Sofia time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.