Which layover airport has the shortest travel time from Boston to Sofia?

Flights connecting via Vienna (VIE) have the shortest average one-way travel time: 10h 47m.

Which layover airport offers the lowest fares from Boston to Sofia?

Flights via Amsterdam (AMS) offer the lowest average round-trip price of $602.

Which layover airport has the shortest connection time from Boston to Sofia?

Vienna (VIE) has the shortest average layover time for this route: 1h 48m.

Which airport is the most popular layover for flights between Boston and Sofia?

Rome (FCO) was the most common stop: 24% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Sofia?

Lufthansa, KLM and Turkish Airlines are the top three most popular airlines that fly to Sofia from Boston according to our data. Lufthansa is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 8 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Boston Logan Intl Airport to Sofia Airport?

Prices for flights from Boston Logan Intl Airport to Sofia Airport were last updated today.

How many operators does momondo search for flights from Boston Logan Intl Airport to Sofia Airport?

As of August 2026, there are 8 operators available to choose from for flights from Boston Logan Intl Airport to Sofia Airport.

How old do you have to be to fly from Boston Logan Intl Airport to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$304 Cheap Flights from Boston to Sofia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:50 pm - 8:45 amBOS Boston Logan Intl-SOF Sofia

27h 55m1 stop Istanbul

9:40 am - 7:05 pmSOF Sofia-BOS Boston Logan Intl

15h 25m1 stop Istanbul

$802Turkish Airlines

Tue, Oct 13 - Tue, Oct 27

9:50 pm - 11:45 amBOS Boston Logan Intl-SOF Sofia

30h 55m1 stop Istanbul

9:45 pm - 7:05 pmSOF Sofia-BOS Boston Logan Intl

27h 20m1 stop Istanbul

$802Turkish Airlines

Wed, Oct 14 - Wed, Oct 28

5:40 pm - 6:55 pmBOS Boston Logan Intl-SOF Sofia

18h 15m2 stops Kastrup Copenhagen Václav Havel Prague

6:30 pm - 3:35 pmSOF Sofia-BOS Boston Logan Intl

28h 05m2 stops Václav Havel Prague Kastrup Copenhagen

$802Multiple Airlines

Sun, Oct 11 - Wed, Oct 14

10:40 am - 9:15 pmBOS Boston Logan Intl-SOF Sofia

27h 35m2 stops Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat

6:45 pm - 8:20 pmSOF Sofia-BOS Boston Logan Intl

32h 35m2 stops Barcelona-El Prat Lisbon Humberto Delgado

$802Multiple Airlines

Tue, Sep 8 - Tue, Sep 22

12:00 pm - 6:00 pmBOS Boston Logan Intl-SOF Sofia

23h 00m2 stops Newark Vienna Intl

7:55 am - 1:30 pmSOF Sofia-BOS Boston Logan Intl

12h 35m1 stop Vienna Intl

$803Austrian Airlines

Tue, Nov 3 - Tue, Nov 17

12:00 pm - 11:50 amBOS Boston Logan Intl-SOF Sofia

16h 50m2 stops Newark Vienna Intl

7:55 am - 1:30 pmSOF Sofia-BOS Boston Logan Intl

12h 35m1 stop Vienna Intl

$803Austrian Airlines

Tue, Nov 10 - Tue, Nov 17

7:41 pm - 6:20 pmBOS Boston Logan Intl-SOF Sofia

15h 39m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

2:00 pm - 6:35 pmSOF Sofia-BOS Boston Logan Intl

11h 35m1 stop Munich Franz Josef Strauss

$827Lufthansa

Tue, Nov 17 - Tue, Dec 1

9:00 am - 1:15 pmBOS Boston Logan Intl-SOF Sofia

21h 15m2 stops Newark Munich Franz Josef Strauss

7:55 am - 1:30 pmSOF Sofia-BOS Boston Logan Intl

12h 35m1 stop Vienna Intl

$827United Airlines

Mon, Nov 2 - Tue, Nov 17

9:00 am - 1:15 pmBOS Boston Logan Intl-SOF Sofia

21h 15m2 stops Newark Munich Franz Josef Strauss

7:55 am - 1:30 pmSOF Sofia-BOS Boston Logan Intl

12h 35m1 stop Vienna Intl

$827United Airlines

Mon, Nov 2 - Fri, Nov 20

7:41 pm - 10:55 pmBOS Boston Logan Intl-SOF Sofia

20h 14m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

2:00 pm - 11:54 pmSOF Sofia-BOS Boston Logan Intl

16h 54m2 stops Munich Franz Josef Strauss Washington, D.C. Dulles Intl

$842Lufthansa

Tue, Nov 17 - Tue, Dec 1

Cheap last minute flights

Enter your travel dates to find the best prices.

8:05 pm - 6:40 pmBOS Boston Logan Intl-SOF Sofia

15h 35m1 stop Munich Franz Josef Strauss

7:25 pm - 5:40 pmSOF Sofia-BOS Boston Logan Intl

29h 15m1 stop Munich Franz Josef Strauss

$1,038Lufthansa

Sun, Aug 23 - Sun, Aug 30

8:05 pm - 6:40 pmBOS Boston Logan Intl-SOF Sofia

15h 35m1 stop Munich Franz Josef Strauss

7:25 pm - 5:40 pmSOF Sofia-BOS Boston Logan Intl

29h 15m1 stop Munich Franz Josef Strauss

$1,038Lufthansa

Mon, Aug 24 - Sun, Aug 30

10:40 am - 6:40 pmBOS Boston Logan Intl-SOF Sofia

25h 00m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

7:25 pm - 5:40 pmSOF Sofia-BOS Boston Logan Intl

29h 15m1 stop Munich Franz Josef Strauss

$1,039Multiple Airlines

Sun, Aug 23 - Sun, Aug 30

9:40 pm - 2:55 pmBOS Boston Logan Intl-SOF Sofia

10h 15m1 stop Zurich

7:25 pm - 5:40 pmSOF Sofia-BOS Boston Logan Intl

29h 15m1 stop Munich Franz Josef Strauss

$1,040Multiple Airlines

Sun, Aug 23 - Sun, Aug 30

10:40 am - 6:40 pmBOS Boston Logan Intl-SOF Sofia

25h 00m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

7:25 pm - 5:40 pmSOF Sofia-BOS Boston Logan Intl

29h 15m1 stop Munich Franz Josef Strauss

$1,042Multiple Airlines

Sun, Aug 23 - Sun, Aug 30

9:40 pm - 10:20 amBOS Boston Logan Intl-SOF Sofia

29h 40m1 stop Zurich

6:10 am - 11:59 pmSOF Sofia-BOS Boston Logan Intl

24h 49m2 stops Munich Franz Josef Strauss Washington, D.C. Dulles Intl

$1,051Multiple Airlines

Mon, Aug 24 - Sun, Aug 30

10:40 am - 6:40 pmBOS Boston Logan Intl-SOF Sofia

25h 00m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

6:10 am - 9:45 amSOF Sofia-BOS Boston Logan Intl

34h 35m2 stops Munich Franz Josef Strauss Montreal Pierre Elliott Trudeau Intl

$1,054Air Canada

Sun, Aug 23 - Sun, Aug 30

7:30 am - 11:15 pmBOS Boston Logan Intl-SOF Sofia

32h 45m2 stops Newark Munich Franz Josef Strauss

6:10 am - 1:11 amSOF Sofia-BOS Boston Logan Intl

26h 01m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$1,062United Airlines

Mon, Aug 24 - Sun, Aug 30

12:41 pm - 6:40 pmBOS Boston Logan Intl-SOF Sofia

22h 59m2 stops Newark Munich Franz Josef Strauss

6:10 am - 7:19 pmSOF Sofia-BOS Boston Logan Intl

20h 09m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$1,062United Airlines

Sun, Aug 23 - Sun, Aug 30

8:50 pm - 1:15 amBOS Boston Logan Intl-SOF Sofia

21h 25m3 stops Reykjavik Keflavik Intl Oslo Gardermoen Krakow J. Paul II Balice

12:55 pm - 9:45 amSOF Sofia-BOS Boston Logan Intl

27h 50m2 stops Munich Franz Josef Strauss Montreal Pierre Elliott Trudeau Intl

$1,143Multiple Airlines

Sun, Aug 23 - Fri, Aug 28

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United Airlines flights from Boston to Sofia

Our best United Airlines deals on Boston to Sofia flight tickets

United Airlines

Nov 2

BOS9:00 amBoston Logan Intl

21h 15m

2 stops

SOF1:15 pmSofia

Nov 17

SOF7:55 amSofia

12h 35m

1 stop

BOS1:30 pmBoston Logan Intl

$827

United Airlines

Nov 2

BOS12:00 pmBoston Logan Intl

18h 15m

2 stops

SOF1:15 pmSofia

Nov 19

SOF2:00 pmSofia

11h 35m

1 stop

BOS6:35 pmBoston Logan Intl

$829

United Airlines

Nov 3

BOS9:00 amBoston Logan Intl

19h 50m

2 stops

SOF11:50 amSofia

Nov 20

SOF7:55 amSofia

12h 35m

1 stop

BOS1:30 pmBoston Logan Intl

$831

Turkish Airlines flights from Boston to Sofia

Our best Turkish Airlines deals on Boston to Sofia flight tickets

Turkish Airlines

Oct 12

BOS9:50 pmBoston Logan Intl

15h 30m

1 stop

SOF8:20 pmSofia

Oct 27

SOF9:40 amSofia

15h 25m

1 stop

BOS7:05 pmBoston Logan Intl

$812

Turkish Airlines

Nov 5

BOS9:00 pmBoston Logan Intl

28h 50m

1 stop

SOF8:50 amSofia

Nov 16

SOF9:45 pmSofia

27h 20m

1 stop

BOS6:05 pmBoston Logan Intl

$822

Turkish Airlines

Oct 7

BOS9:50 pmBoston Logan Intl

30h 55m

1 stop

SOF11:45 amSofia

Oct 21

SOF9:35 amSofia

17h 20m

1 stop

BOS7:55 pmBoston Logan Intl

$832

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 10/13

9:50 pm-8:45 am

1 stop27h 55m

Sofia

Tue 10/27

9:40 am-7:05 pm

1 stop15h 25m

$802

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Wed 10/14

9:50 pm-11:45 am

1 stop30h 55m

Sofia

Wed 10/28

9:45 pm-7:05 pm

1 stop27h 20m

$802

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Sun 10/11

5:40 pm-6:55 pm

2 stops18h 15m

Sofia

Wed 10/14

6:30 pm-3:35 pm

2 stops28h 05m

$802

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 9/8

10:40 am-9:15 pm

2 stops27h 35m

Sofia

Tue 9/22

6:45 pm-8:20 pm

2 stops32h 35m

$802

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 11/3

12:00 pm-6:00 pm

2 stops23h 00m

Sofia

Tue 11/17

7:55 am-1:30 pm

1 stop12h 35m

$803

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 11/10

12:00 pm-11:50 am

2 stops16h 50m

Sofia

Tue 11/17

7:55 am-1:30 pm

1 stop12h 35m

$803

Quickest round-trip

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 11/17

7:41 pm-6:20 pm

2 stops15h 39m

Sofia

Tue 12/1

2:00 pm-6:35 pm

1 stop11h 35m

$827

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Mon 11/2

9:00 am-1:15 pm

2 stops21h 15m

Sofia

Tue 11/17

7:55 am-1:30 pm

1 stop12h 35m

$827

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Mon 11/2

9:00 am-1:15 pm

2 stops21h 15m

Sofia

Fri 11/20

7:55 am-1:30 pm

1 stop12h 35m

$827

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 11/17

7:41 pm-10:55 pm

2 stops20h 14m

Sofia

Tue 12/1

2:00 pm-11:54 pm

2 stops16h 54m

$842

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Boston to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Boston and Sofia?

Prices are currently typical for flights on this route.

Typical prices usually range from $498 to $890.
The lowest price recently found on this route was $802.

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Boston is in February. Flight prices, which tend to average around $460, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Sofia from Boston during November instead. Flights to Sofia in November, while not as cheap as those in February, still average around $478.

How far in advance should I book a flight from Boston to Sofia?

You are more likely to see cheaper flights to Sofia from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $662 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Boston for as low as $474 on momondo.

Can stopping save me money on Boston to Sofia flights?

You could potentially save up to 58% on your flight if you consider stops on a Boston to Sofia flight.

How have Boston to Sofia flight prices changed over time?

As of August 2026, prices for Boston to Sofia flights are approximately 39% cheaper when compared to flights at the same time last year.

When to book flights from Boston to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Sofia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Boston to Sofia (BOS to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Sofia

Best Price Found	$304
Fastest flight time	11h 30m
Direct flights	None

The best one-way flight to Sofia from Boston in the past 72 hours is $304. The best round-trip flight deal from Boston to Sofia found on momondo in the last 72 hours is $802.

The fastest flight from Boston to Sofia takes 11h 30m

There are no direct flights from Boston to Sofia. There are no popular flight routes from Boston to Sofia.

Search flight deals

Frequently asked questions about flying from Boston to Sofia

How far is Boston Logan Intl to Sofia by plane?
Boston Logan Intl and Sofia are 4519.3 mi apart from one another. In terms of flight time, this usually takes a little over 11h 30m.
When did momondo last update prices for flights from Boston Logan Intl Airport to Sofia Airport?
Prices for flights from Boston Logan Intl Airport to Sofia Airport were last updated today.
How many operators does momondo search for flights from Boston Logan Intl Airport to Sofia Airport?
As of August 2026, there are 8 operators available to choose from for flights from Boston Logan Intl Airport to Sofia Airport.
How old do you have to be to fly from Boston Logan Intl Airport to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Boston to Sofia?
Based on momondo bookings for flights between Boston and Sofia, the leading airline is Lufthansa, making up 34% of the total bookings. Other popular airlines include KLM with 17%, Turkish Airlines with 12%, and United Airlines with 9%.

Best airlines flying from Boston to Sofia

Compare and see reviews for airlines that fly from Boston to Sofia with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $380	Free Cancellation	Rating 7.8 1,562 reviews	Search KLM flights
Austrian Airlines	PriceFrom $394	Free Cancellation	Rating 7.6 949 reviews	Search Austrian Airlines flights
United Airlines	PriceFrom $394	Free Cancellation	Rating 7.4 10,112 reviews	Search United Airlines flights
Lufthansa	PriceFrom $396	Free Cancellation	Rating 6.8 8,206 reviews	Search Lufthansa flights
Air France	PriceFrom $396	Free Cancellation	Rating 7.5 1,648 reviews	Search Air France flights
SWISS	PriceFrom $410	Free Cancellation	Rating 7.5 2,049 reviews	Search SWISS flights
Turkish Airlines	PriceFrom $524	Free Cancellation	Rating 7.4 4,480 reviews	Search Turkish Airlines flights
ITA Airways	PriceFrom $694	Free Cancellation	Rating 6.7 1,323 reviews	Search ITA Airways flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Sofia?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Boston to Sofia. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Boston to Sofia with flexible booking policies on momondo?

Flights from Boston to Sofia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Boston to Sofia?

Once you have performed a search for Boston to Sofia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Boston to Sofia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Sofia from Boston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Cheap flights from Boston to Sofia from $304

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Sofia departing on 11/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Boston to Sofia

Our best United Airlines deals on Boston to Sofia flight tickets

Turkish Airlines flights from Boston to Sofia

Our best Turkish Airlines deals on Boston to Sofia flight tickets

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How to get the cheapest flight ticket from Boston to Sofia

What is the typical price of a round-trip flight between Boston and Sofia?

What is the cheapest month to fly to Sofia?

How far in advance should I book a flight from Boston to Sofia?

Can stopping save me money on Boston to Sofia flights?

How have Boston to Sofia flight prices changed over time?

What airlines fly to Sofia?

Which airport is the most popular layover for flights between Boston and Sofia?

Which layover airport offers the lowest fares from Boston to Sofia?

Which layover airport has the shortest travel time from Boston to Sofia?

Which layover airport has the shortest connection time from Boston to Sofia?

When to book flights from Boston to Sofia

Cheap Boston to Sofia (BOS to SOF) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Boston to Sofia

Best airlines flying from Boston to Sofia

Compare and see reviews for airlines that fly from Boston to Sofia with momondo

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Bulgaria

Fly your favorite airline to Sofia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Sofia

List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

Popular cities in Bulgaria

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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