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

Flights via Amsterdam (AMS) offer the lowest average round-trip price of $606.

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

Vienna (VIE) has the shortest average layover time for this route: 1h 45m.

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 38m.

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

Frankfurt am Main (FRA) was the most common stop: 23% 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 9 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 October 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.

$289 Cheap Flights from Boston to Sofia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Sofia

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 pm - 1:10 amBOS Boston Logan Intl-SOF Sofia

22h 10m1 stop Madrid Barajas

10:00 pm - 6:25 pmSOF Sofia-BOS Boston Logan Intl

27h 25m1 stop Madrid Barajas

$541Multiple Airlines

Sun, Dec 6 - Sun, Dec 20

8:00 pm - 5:00 pmBOS Boston Logan Intl-SOF Sofia

14h 00m1 stop Madrid Barajas

10:40 am - 6:25 pmSOF Sofia-BOS Boston Logan Intl

14h 45m1 stop Madrid Barajas

$554Multiple Airlines

Mon, Nov 30 - Mon, Dec 14

9:00 pm - 3:10 pmBOS Boston Logan Intl-SOF Sofia

11h 10m1 stop Istanbul

9:30 am - 6:05 pmSOF Sofia-BOS Boston Logan Intl

15h 35m1 stop Istanbul

$658Turkish Airlines

Mon, Nov 2 - Tue, Nov 17

9:00 pm - 3:10 pmBOS Boston Logan Intl-SOF Sofia

11h 10m1 stop Istanbul

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

33h 05m1 stop Istanbul

$686Turkish Airlines

Tue, Nov 3 - Tue, Nov 17

9:50 pm - 1:25 pmBOS Boston Logan Intl-SOF Sofia

32h 35m1 stop London Heathrow

8:10 pm - 4:55 pmSOF Sofia-BOS Boston Logan Intl

27h 45m1 stop London Heathrow

$781British Airways

Wed, Apr 7 - Mon, Apr 12

2:16 pm - 11:50 amBOS Boston Logan Intl-SOF Sofia

15h 34m2 stops Washington, D.C. Dulles Intl Vienna Intl

8:00 am - 1:50 pmSOF Sofia-BOS Boston Logan Intl

12h 50m1 stop Vienna Intl

$789Austrian Airlines

Tue, Mar 16 - Tue, Mar 30

7:18 pm - 8:30 pmBOS Boston Logan Intl-SOF Sofia

42h 12m2 stops New York LaGuardia London Heathrow

8:10 pm - 4:54 pmSOF Sofia-BOS Boston Logan Intl

27h 44m2 stops London Heathrow New York John F Kennedy Intl

$792British Airways

Mon, Apr 12 - Mon, Apr 26

2:16 pm - 6:00 pmBOS Boston Logan Intl-SOF Sofia

21h 44m2 stops Washington, D.C. Dulles Intl Vienna Intl

8:00 am - 5:25 pmSOF Sofia-BOS Boston Logan Intl

16h 25m2 stops Vienna Intl Newark

$798Austrian Airlines

Tue, Mar 16 - Tue, Mar 30

12:26 pm - 1:15 pmBOS Boston Logan Intl-SOF Sofia

17h 49m3 stops Newark Washington, D.C. Dulles Intl Munich Franz Josef Strauss

7:55 am - 11:54 pmSOF Sofia-BOS Boston Logan Intl

22h 59m2 stops Vienna Intl Washington, D.C. Dulles Intl

$822United Airlines

Wed, Feb 10 - Wed, Feb 24

12:26 pm - 1:15 pmBOS Boston Logan Intl-SOF Sofia

17h 49m3 stops Newark Washington, D.C. Dulles Intl Munich Franz Josef Strauss

7:55 am - 5:15 pmSOF Sofia-BOS Boston Logan Intl

16h 20m2 stops Vienna Intl Newark

$822United Airlines

Tue, Feb 9 - Tue, Feb 23

Cheap last minute flights

Enter your travel dates to find the best prices.

8:10 pm - 8:20 pmBOS Boston Logan Intl-SOF Sofia

17h 10m2 stops New York John F Kennedy Intl Istanbul

9:30 am - 6:05 pmSOF Sofia-BOS Boston Logan Intl

15h 35m1 stop Istanbul

$785Multiple Airlines

Tue, Oct 20 - Tue, Nov 17

8:10 pm - 8:20 pmBOS Boston Logan Intl-SOF Sofia

17h 10m2 stops New York John F Kennedy Intl Istanbul

9:30 am - 11:48 pmSOF Sofia-BOS Boston Logan Intl

21h 18m2 stops Istanbul New York John F Kennedy Intl

$795Multiple Airlines

Tue, Oct 20 - Tue, Nov 17

10:45 pm - 1:25 amBOS Boston Logan Intl-SOF Sofia

19h 40m2 stops Lisbon Humberto Delgado Madrid Barajas

2:05 pm - 2:40 pmSOF Sofia-BOS Boston Logan Intl

31h 35m3 stops Dublin Madrid Barajas Lisbon Humberto Delgado

$849Multiple Airlines

Tue, Oct 20 - Tue, Nov 17

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

34h 10m1 stop Istanbul

9:40 pm - 6:05 pmSOF Sofia-BOS Boston Logan Intl

27h 25m1 stop Istanbul

$965Turkish Airlines

Tue, Oct 20 - Tue, Nov 17

5:45 pm - 1:35 pmBOS Boston Logan Intl-SOF Sofia

12h 50m1 stop Frankfurt am Main

2:00 pm - 7:35 pmSOF Sofia-BOS Boston Logan Intl

11h 35m1 stop Munich Franz Josef Strauss

$988Lufthansa

Sun, Oct 18 - Tue, Oct 27

11:35 pm - 11:10 amBOS Boston Logan Intl-SOF Sofia

52h 35m2 stops Barcelona-El Prat Bergamo Orio Al Serio

9:30 am - 7:05 pmSOF Sofia-BOS Boston Logan Intl

15h 35m1 stop Istanbul

$1,025Multiple Airlines

Sun, Oct 18 - Tue, Oct 27

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

15h 35m1 stop Munich Franz Josef Strauss

6:00 am - 7:35 pmSOF Sofia-BOS Boston Logan Intl

19h 35m1 stop Munich Franz Josef Strauss

$1,052Lufthansa

Thu, Oct 15 - Wed, Oct 28

5:10 pm - 2:55 pmBOS Boston Logan Intl-SOF Sofia

14h 45m1 stop Zurich

7:55 am - 2:30 pmSOF Sofia-BOS Boston Logan Intl

12h 35m1 stop Vienna Intl

$1,056Multiple Airlines

Sun, Oct 18 - Tue, Oct 27

1:00 pm - 8:20 pmBOS Boston Logan Intl-SOF Sofia

24h 20m2 stops New York John F Kennedy Intl Istanbul

4:00 pm - 7:05 pmSOF Sofia-BOS Boston Logan Intl

33h 05m1 stop Istanbul

$1,075Multiple Airlines

Thu, Oct 15 - Wed, Oct 28

8:05 pm - 6:10 pmBOS Boston Logan Intl-SOF Sofia

15h 05m2 stops Munich Franz Josef Strauss Frankfurt am Main

7:55 am - 6:34 pmSOF Sofia-BOS Boston Logan Intl

16h 39m2 stops Vienna Intl Newark

$1,094Multiple Airlines

Sun, Oct 18 - Tue, Oct 27

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Turkish Airlines flights from Boston to Sofia

Our best Turkish Airlines deals on Boston to Sofia flight tickets

Turkish Airlines

Nov 2

BOS9:00 pmBoston Logan Intl

11h 10m

1 stop

SOF3:10 pmSofia

Nov 17

SOF9:30 amSofia

15h 35m

1 stop

BOS6:05 pmBoston Logan Intl

$658

Turkish Airlines

Nov 2

BOS9:00 pmBoston Logan Intl

28h 40m

1 stop

SOF8:40 amSofia

Nov 17

SOF9:40 pmSofia

27h 25m

1 stop

BOS6:05 pmBoston Logan Intl

$686

Turkish Airlines

Nov 2

BOS9:00 pmBoston Logan Intl

28h 40m

1 stop

SOF8:40 amSofia

Nov 17

SOF9:40 pmSofia

27h 25m

1 stop

BOS6:05 pmBoston Logan Intl

$692

Lufthansa flights from Boston to Sofia

Our best Lufthansa deals on Boston to Sofia flight tickets

Lufthansa

Oct 18

BOS5:45 pmBoston Logan Intl

12h 50m

1 stop

SOF1:35 pmSofia

Oct 27

SOF2:00 pmSofia

11h 35m

1 stop

BOS7:35 pmBoston Logan Intl

$988

Lufthansa

Oct 15

BOS8:05 pmBoston Logan Intl

15h 35m

1 stop

SOF6:40 pmSofia

Oct 28

SOF6:00 amSofia

19h 35m

1 stop

BOS7:35 pmBoston Logan Intl

$1,052

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Sun 12/6

8:00 pm-1:10 am

1 stop22h 10m

Sofia

Sun 12/20

10:00 pm-6:25 pm

1 stop27h 25m

$541

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Mon 11/30

8:00 pm-5:00 pm

1 stop14h 00m

Sofia

Mon 12/14

10:40 am-6:25 pm

1 stop14h 45m

$554

Quickest round-trip

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Mon 11/2

9:00 pm-3:10 pm

1 stop11h 10m

Sofia

Tue 11/17

9:30 am-6:05 pm

1 stop15h 35m

$658

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 11/3

9:00 pm-3:10 pm

1 stop11h 10m

Sofia

Tue 11/17

4:00 pm-6:05 pm

1 stop33h 05m

$686

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Wed 4/7

9:50 pm-1:25 pm

1 stop32h 35m

Sofia

Mon 4/12

8:10 pm-4:55 pm

1 stop27h 45m

$781

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 3/16

2:16 pm-11:50 am

2 stops15h 34m

Sofia

Tue 3/30

8:00 am-1:50 pm

1 stop12h 50m

$789

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Mon 4/12

7:18 pm-8:30 pm

2 stops42h 12m

Sofia

Mon 4/26

8:10 pm-4:54 pm

2 stops27h 44m

$792

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 3/16

2:16 pm-6:00 pm

2 stops21h 44m

Sofia

Tue 3/30

8:00 am-5:25 pm

2 stops16h 25m

$798

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Wed 2/10

12:26 pm-1:15 pm

3 stops17h 49m

Sofia

Wed 2/24

7:55 am-11:54 pm

2 stops22h 59m

$822

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 2/9

12:26 pm-1:15 pm

3 stops17h 49m

Sofia

Tue 2/23

7:55 am-5:15 pm

2 stops16h 20m

$822

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 low for flights on this route.

Typical prices usually range from $580 to $889.
The lowest price recently found on this route was $541.

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 $448, 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 $510.

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 $731 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 66% 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 October 2026, prices for Boston to Sofia flights are approximately 6% 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	$289
Fastest flight time	12h 10m
Direct flights	None

The best one-way flight to Sofia from Boston in the past 72 hours is $289. The best round-trip flight deal from Boston to Sofia found on momondo in the last 72 hours is $541.

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 October 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 34% of the total bookings. Other popular airlines include KLM with 16%, Turkish Airlines with 15%, and United Airlines with 8%.

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
Austrian Airlines	PriceFrom $394	Free Cancellation	Rating 7.6 980 reviews	Search Austrian Airlines flights
Air France	PriceFrom $396	Free Cancellation	Rating 7.5 1,651 reviews	Search Air France flights
KLM	PriceFrom $403	Free Cancellation	Rating 7.8 1,587 reviews	Search KLM flights
United Airlines	PriceFrom $405	Free Cancellation	Rating 7.4 10,363 reviews	Search United Airlines flights
SWISS	PriceFrom $410	Free Cancellation	Rating 7.5 2,104 reviews	Search SWISS flights
Lufthansa	PriceFrom $416	Free Cancellation	Rating 6.8 8,278 reviews	Search Lufthansa flights
British Airways	PriceFrom $421	Free Cancellation	Rating 6.7 8,262 reviews	Search British Airways flights
Turkish Airlines	PriceFrom $524	Free Cancellation	Rating 7.4 4,455 reviews	Search Turkish Airlines flights
ITA Airways	PriceFrom $694	Free Cancellation	Rating 6.8 1,392 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 $289

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 11/4. 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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Turkish Airlines flights from Boston to Sofia

Our best Turkish Airlines deals on Boston to Sofia flight tickets

Lufthansa flights from Boston to Sofia

Our best Lufthansa deals on Boston to Sofia flight tickets

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See travel insights to Sofia from

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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