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 46% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 9 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

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: 23% of momondo users choosing 1-stop flights on this route connected there.

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 travel time from Boston to Sofia?

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

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 9 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.

$308 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.

5:50 am - 1:40 pmBOS Boston Logan Intl-SOF Sofia

24h 50m2 stops Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat

4:50 pm - 9:45 pmSOF Sofia-BOS Boston Logan Intl

34h 55m3 stops Barcelona-El Prat Lisbon Humberto Delgado Porto

$828Multiple Airlines

Sat, Oct 17 - Sat, Oct 31

8:50 pm - 3:00 amBOS Boston Logan Intl-SOF Sofia

23h 10m3 stops Reykjavik Keflavik Intl Munich Franz Josef Strauss Belgrade Nikola Tesla

4:50 pm - 9:45 pmSOF Sofia-BOS Boston Logan Intl

34h 55m3 stops Barcelona-El Prat Lisbon Humberto Delgado Porto

$828Multiple Airlines

Sat, Oct 17 - Sat, Oct 31

2:40 pm - 6:00 pmBOS Boston Logan Intl-SOF Sofia

20h 20m2 stops Washington, D.C. Dulles Intl Vienna Intl

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

12h 35m1 stop Vienna Intl

$830Austrian Airlines

Tue, Nov 17 - Tue, Dec 1

9:50 pm - 3:00 pmBOS Boston Logan Intl-SOF Sofia

34h 10m1 stop Istanbul

9:10 pm - 7:55 pmSOF Sofia-BOS Boston Logan Intl

29h 45m1 stop Istanbul

$831Turkish Airlines

Sun, Sep 20 - Sun, Oct 4

8:00 pm - 8:50 amBOS Boston Logan Intl-SOF Sofia

29h 50m1 stop Istanbul

4:00 pm - 6:05 pmSOF Sofia-BOS Boston Logan Intl

33h 05m1 stop Istanbul

$831Turkish Airlines

Wed, Nov 25 - Sun, Nov 29

6:33 pm - 6:20 pmBOS Boston Logan Intl-SOF Sofia

16h 47m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

7:55 am - 5:25 pmSOF Sofia-BOS Boston Logan Intl

16h 30m2 stops Vienna Intl Newark

$837United Airlines

Wed, Jan 27 - Thu, Feb 4

6:33 pm - 6:20 pmBOS Boston Logan Intl-SOF Sofia

16h 47m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

7:55 am - 6:13 pmSOF Sofia-BOS Boston Logan Intl

17h 18m2 stops Vienna Intl Newark

$837United Airlines

Wed, Jan 27 - Fri, Feb 5

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 - 6:35 pmSOF Sofia-BOS Boston Logan Intl

11h 35m1 stop Munich Franz Josef Strauss

$844Lufthansa

Tue, Nov 10 - Sun, Nov 22

8:40 pm - 10:55 pmBOS Boston Logan Intl-SOF Sofia

19h 15m1 stop Munich Franz Josef Strauss

7:05 pm - 6:35 pmSOF Sofia-BOS Boston Logan Intl

30h 30m1 stop Munich Franz Josef Strauss

$845Lufthansa

Tue, Jan 26 - Mon, Feb 1

1:30 pm - 11:55 pmBOS Boston Logan Intl-SOF Sofia

27h 25m2 stops Newark Vienna Intl

6:45 pm - 6:49 pmSOF Sofia-BOS Boston Logan Intl

31h 04m2 stops Vienna Intl Washington, D.C. Dulles Intl

$850Austrian Airlines

Sun, Jan 24 - Mon, Feb 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

$870Lufthansa

Mon, Aug 10 - Tue, Aug 18

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

$870Lufthansa

Sun, Aug 9 - Tue, Aug 18

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

15h 35m1 stop Munich Franz Josef Strauss

6:10 am - 5:40 pmSOF Sofia-BOS Boston Logan Intl

18h 30m1 stop Munich Franz Josef Strauss

$894United Airlines

Sun, Aug 9 - Thu, Aug 13

8:05 pm - 11:15 pmBOS Boston Logan Intl-SOF Sofia

20h 10m1 stop Munich Franz Josef Strauss

6:10 am - 5:40 pmSOF Sofia-BOS Boston Logan Intl

18h 30m1 stop Munich Franz Josef Strauss

$894United Airlines

Mon, Aug 10 - Thu, Aug 13

12:30 pm - 6:40 pmBOS Boston Logan Intl-SOF Sofia

23h 10m2 stops Toronto Pearson Intl Munich Franz Josef Strauss

2:20 pm - 5:42 pmSOF Sofia-BOS Boston Logan Intl

58h 22m2 stops Frankfurt am Main Halifax Intl

$930Air Canada

Sun, Aug 9 - Mon, Aug 17

4:55 pm - 6:40 pmBOS Boston Logan Intl-SOF Sofia

42h 45m2 stops Toronto Pearson Intl Munich Franz Josef Strauss

2:20 pm - 5:42 pmSOF Sofia-BOS Boston Logan Intl

58h 22m2 stops Frankfurt am Main Halifax Intl

$930Air Canada

Sat, Aug 8 - Mon, Aug 17

5:10 pm - 12:10 pmBOS Boston Logan Intl-SOF Sofia

12h 00m2 stops Zurich Munich Franz Josef Strauss

12:55 pm - 3:10 pmSOF Sofia-BOS Boston Logan Intl

33h 15m2 stops Munich Franz Josef Strauss Zurich

$1,056SWISS

Mon, Aug 10 - Wed, Aug 12

9:40 pm - 12:55 pmBOS Boston Logan Intl-SOF Sofia

32h 15m1 stop Zurich

12:55 pm - 7:55 pmSOF Sofia-BOS Boston Logan Intl

38h 00m2 stops Munich Franz Josef Strauss Zurich

$1,085SWISS

Thu, Aug 6 - Wed, Aug 12

5:05 pm - 12:10 pmBOS Boston Logan Intl-SOF Sofia

12h 05m1 stop Rome Fiumicino

7:00 am - 6:22 pmSOF Sofia-BOS Boston Logan Intl

18h 22m2 stops Rome Fiumicino Toronto Pearson Intl

$1,213ITA Airways

Fri, Aug 7 - Sat, Aug 15

9:50 pm - 8:20 pmBOS Boston Logan Intl-SOF Sofia

15h 30m1 stop Istanbul

9:35 am - 7:55 pmSOF Sofia-BOS Boston Logan Intl

17h 20m1 stop Istanbul

$1,262Turkish Airlines

Thu, Aug 6 - Sat, Aug 15

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Austrian Airlines flights from Boston to Sofia

Our best Austrian Airlines deals on Boston to Sofia flight tickets

Austrian Airlines

Nov 17

BOS2:40 pmBoston Logan Intl

20h 20m

2 stops

SOF6:00 pmSofia

Dec 1

SOF7:55 amSofia

12h 35m

1 stop

BOS1:30 pmBoston Logan Intl

$830

Austrian Airlines

Jan 29

BOS2:16 pmBoston Logan Intl

14h 34m

2 stops

SOF11:50 amSofia

Feb 12

SOF7:55 amSofia

16h 30m

2 stops

BOS5:25 pmBoston Logan Intl

$859

Austrian Airlines

Aug 25

BOS5:10 pmBoston Logan Intl

18h 00m

1 stop

SOF6:10 pmSofia

Sep 8

SOF8:00 amSofia

12h 50m

1 stop

BOS1:50 pmBoston Logan Intl

$864

Turkish Airlines flights from Boston to Sofia

Our best Turkish Airlines deals on Boston to Sofia flight tickets

Turkish Airlines

Sep 20

BOS9:50 pmBoston Logan Intl

34h 10m

1 stop

SOF3:00 pmSofia

Oct 4

SOF9:10 pmSofia

29h 45m

1 stop

BOS7:55 pmBoston Logan Intl

$831

Turkish Airlines

Oct 14

BOS9:50 pmBoston Logan Intl

30h 55m

1 stop

SOF11:45 amSofia

Oct 24

SOF9:10 pmSofia

28h 55m

1 stop

BOS7:05 pmBoston Logan Intl

$842

Turkish Airlines

Jan 29

BOS8:00 pmBoston Logan Intl

32h 05m

1 stop

SOF11:05 amSofia

Feb 3

SOF9:40 amSofia

15h 25m

1 stop

BOS6:05 pmBoston Logan Intl

$852

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Sat 10/17

5:50 am-1:40 pm

2 stops24h 50m

Sofia

Sat 10/31

4:50 pm-9:45 pm

3 stops34h 55m

$828

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Sat 10/17

8:50 pm-3:00 am

3 stops23h 10m

Sofia

Sat 10/31

4:50 pm-9:45 pm

3 stops34h 55m

$828

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 11/17

2:40 pm-6:00 pm

2 stops20h 20m

Sofia

Tue 12/1

7:55 am-1:30 pm

1 stop12h 35m

$830

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Sun 9/20

9:50 pm-3:00 pm

1 stop34h 10m

Sofia

Sun 10/4

9:10 pm-7:55 pm

1 stop29h 45m

$831

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Wed 11/25

8:00 pm-8:50 am

1 stop29h 50m

Sofia

Sun 11/29

4:00 pm-6:05 pm

1 stop33h 05m

$831

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Wed 1/27

6:33 pm-6:20 pm

2 stops16h 47m

Sofia

Thu 2/4

7:55 am-5:25 pm

2 stops16h 30m

$837

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Wed 1/27

6:33 pm-6:20 pm

2 stops16h 47m

Sofia

Fri 2/5

7:55 am-6:13 pm

2 stops17h 18m

$837

Quickest round-trip

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 11/10

7:41 pm-10:55 pm

2 stops20h 14m

Sofia

Sun 11/22

2:00 pm-6:35 pm

1 stop11h 35m

$844

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 1/26

8:40 pm-10:55 pm

1 stop19h 15m

Sofia

Mon 2/1

7:05 pm-6:35 pm

1 stop30h 30m

$845

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Sun 1/24

1:30 pm-11:55 pm

2 stops27h 25m

Sofia

Mon 2/1

6:45 pm-6:49 pm

2 stops31h 04m

$850

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 high for flights on this route.

Typical prices usually range from $491 to $792.
The lowest price recently found on this route was $828.

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 $654 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 52% 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

Fastest flight time	12h 10m
Direct flights	None

The fastest flight from Boston to Sofia takes 12h 10m

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 12h 10m.
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 9 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 33% of the total bookings. Other popular airlines include KLM with 18%, 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 1,555 reviews	Search KLM flights
Austrian Airlines	PriceFrom $394	Free Cancellation	Rating 7.6 951 reviews	Search Austrian Airlines flights
United Airlines	PriceFrom $394	Free Cancellation	Rating 7.4 10,072 reviews	Search United Airlines flights
Lufthansa	PriceFrom $395	Free Cancellation	Rating 6.8 8,176 reviews	Search Lufthansa flights
Air France	PriceFrom $396	Free Cancellation	Rating 7.5 1,637 reviews	Search Air France flights
SWISS	PriceFrom $410	Free Cancellation	Rating 7.5 2,026 reviews	Search SWISS flights
British Airways	PriceFrom $421	Free Cancellation	Rating 6.7 8,147 reviews	Search British Airways flights
Turkish Airlines	PriceFrom $524	Free Cancellation	Rating 7.4 4,468 reviews	Search Turkish Airlines flights
ITA Airways	PriceFrom $694	Free Cancellation	Rating 6.7 1,308 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.

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.

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Cheap flights from Boston to Sofia from $308

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 10/11. 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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Austrian Airlines flights from Boston to Sofia

Our best Austrian 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

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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