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

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

What airlines fly to Sofia?

Lufthansa, Turkish Airlines and KLM 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 airport is the most popular layover for flights between Boston and Sofia?

Frankfurt am Main (FRA) was the most common stop: 22% of momondo users choosing 1-stop flights on this route connected there.

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

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

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.

$584 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

Last minute

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

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

15h 15m1 stop Madrid Barajas

$584Multiple Airlines

Wed, Feb 24 - Wed, Mar 10

8:00 pm - 9:20 pmBOS Boston Logan Intl-SOF Sofia

18h 20m1 stop Madrid Barajas

10:55 am - 6:25 pmSOF Sofia-BOS Boston Logan Intl

14h 30m1 stop Madrid Barajas

$596Multiple Airlines

Thu, Nov 26 - Thu, Dec 10

8:00 pm - 3:10 pmBOS Boston Logan Intl-SOF Sofia

12h 10m1 stop Istanbul

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

15h 35m1 stop Istanbul

$676Turkish Airlines

Thu, Nov 12 - Wed, Nov 25

8:00 pm - 3:10 pmBOS Boston Logan Intl-SOF Sofia

12h 10m1 stop Istanbul

9:45 pm - 6:05 pmSOF Sofia-BOS Boston Logan Intl

27h 20m1 stop Istanbul

$678Turkish Airlines

Mon, Nov 16 - Mon, Nov 23

5:05 pm - 12:40 pmBOS Boston Logan Intl-SOF Sofia

12h 35m1 stop Zurich

3:50 pm - 3:30 pmSOF Sofia-BOS Boston Logan Intl

30h 40m1 stop Zurich

$783SWISS

Mon, Apr 26 - Mon, May 10

9:55 pm - 7:20 pmBOS Boston Logan Intl-SOF Sofia

14h 25m1 stop London Heathrow

9:25 pm - 6:48 pmSOF Sofia-BOS Boston Logan Intl

28h 23m2 stops London Heathrow New York John F Kennedy Intl

$790British Airways

Sun, Apr 4 - Wed, Apr 21

7:55 pm - 11:50 amBOS Boston Logan Intl-SOF Sofia

9h 55m1 stop Vienna Intl

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

12h 35m1 stop Vienna Intl

$794Austrian Airlines

Sun, Mar 14 - Fri, Mar 19

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

32h 35m1 stop London Heathrow

9:25 pm - 10:35 pmSOF Sofia-BOS Boston Logan Intl

32h 10m1 stop London Heathrow

$795British Airways

Wed, Apr 7 - Wed, Apr 21

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

29h 40m1 stop Zurich

3:50 pm - 3:30 pmSOF Sofia-BOS Boston Logan Intl

30h 40m1 stop Zurich

$797SWISS

Mon, Mar 29 - Mon, Apr 12

2:20 pm - 11:50 amBOS Boston Logan Intl-SOF Sofia

14h 30m2 stops Washington, D.C. Dulles Intl Vienna Intl

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

12h 35m1 stop Vienna Intl

$798Austrian Airlines

Tue, Feb 23 - Tue, Mar 9

Cheap last minute flights

Enter your travel dates to find the best prices.

9:45 am - 8:40 amBOS Boston Logan Intl-SOF Sofia

15h 55m2 stops New York John F Kennedy Intl Istanbul

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

33h 05m1 stop Istanbul

$744Multiple Airlines

Thu, Nov 5 - Wed, Nov 18

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

11h 10m1 stop Istanbul

9:45 pm - 6:05 pmSOF Sofia-BOS Boston Logan Intl

27h 20m1 stop Istanbul

$784Turkish Airlines

Tue, Nov 3 - Mon, Nov 16

6:39 pm - 8:55 pmBOS Boston Logan Intl-SOF Sofia

19h 16m2 stops New York John F Kennedy Intl Istanbul

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

33h 05m1 stop Istanbul

$785Multiple Airlines

Tue, Nov 3 - Mon, Nov 16

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

$785Turkish Airlines

Tue, Nov 3 - Tue, Nov 17

6:39 pm - 8:55 pmBOS Boston Logan Intl-SOF Sofia

19h 16m2 stops New York John F Kennedy Intl Istanbul

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

33h 05m1 stop Istanbul

$794Multiple Airlines

Tue, Nov 3 - Tue, Nov 17

6:55 pm - 11:50 amBOS Boston Logan Intl-SOF Sofia

9h 55m1 stop Vienna Intl

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

12h 35m1 stop Vienna Intl

$993Austrian 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

$998Austrian Airlines

Tue, Nov 3 - Tue, Nov 17

7:30 am - 7:20 pmBOS Boston Logan Intl-SOF Sofia

28h 50m1 stop London Heathrow

9:05 pm - 9:50 pmSOF Sofia-BOS Boston Logan Intl

31h 45m1 stop London Heathrow

$1,052British Airways

Thu, Nov 5 - Wed, Nov 18

5:30 pm - 7:20 pmBOS Boston Logan Intl-SOF Sofia

18h 50m2 stops New York John F Kennedy Intl London Heathrow

9:05 pm - 4:53 pmSOF Sofia-BOS Boston Logan Intl

26h 48m2 stops London Heathrow New York John F Kennedy Intl

$1,067British Airways

Thu, Nov 5 - Wed, Nov 18

4:05 pm - 11:00 pmBOS Boston Logan Intl-SOF Sofia

23h 55m1 stop Frankfurt am Main

7:05 pm - 1:45 pmSOF Sofia-BOS Boston Logan Intl

49h 40m2 stops Munich Franz Josef Strauss Frankfurt am Main

$3,862Lufthansa

Thu, Nov 5 - Sun, Nov 15

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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 12

BOS8:00 pmBoston Logan Intl

12h 10m

1 stop

SOF3:10 pmSofia

Nov 25

SOF9:30 amSofia

15h 35m

1 stop

BOS6:05 pmBoston Logan Intl

$676

Turkish Airlines

Nov 11

BOS8:00 pmBoston Logan Intl

12h 10m

1 stop

SOF3:10 pmSofia

Nov 18

SOF9:45 pmSofia

27h 20m

1 stop

BOS6:05 pmBoston Logan Intl

$678

Turkish Airlines

Nov 11

BOS8:00 pmBoston Logan Intl

17h 55m

1 stop

SOF8:55 pmSofia

Nov 15

SOF9:45 pmSofia

27h 20m

1 stop

BOS6:05 pmBoston Logan Intl

$686

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Wed 2/24

8:00 pm-1:10 am

1 stop22h 10m

Sofia

Wed 3/10

10:10 am-6:25 pm

1 stop15h 15m

$584

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Thu 11/26

8:00 pm-9:20 pm

1 stop18h 20m

Sofia

Thu 12/10

10:55 am-6:25 pm

1 stop14h 30m

$596

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Thu 11/12

8:00 pm-3:10 pm

1 stop12h 10m

Sofia

Wed 11/25

9:30 am-6:05 pm

1 stop15h 35m

$676

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Mon 11/16

8:00 pm-3:10 pm

1 stop12h 10m

Sofia

Mon 11/23

9:45 pm-6:05 pm

1 stop27h 20m

$678

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Mon 4/26

5:05 pm-12:40 pm

1 stop12h 35m

Sofia

Mon 5/10

3:50 pm-3:30 pm

1 stop30h 40m

$783

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Sun 4/4

9:55 pm-7:20 pm

1 stop14h 25m

Sofia

Wed 4/21

9:25 pm-6:48 pm

2 stops28h 23m

$790

Quickest round-trip

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Sun 3/14

7:55 pm-11:50 am

1 stop9h 55m

Sofia

Fri 3/19

7:55 am-2:30 pm

1 stop12h 35m

$794

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Wed 4/7

9:50 pm-1:25 pm

1 stop32h 35m

Sofia

Wed 4/21

9:25 pm-10:35 pm

1 stop32h 10m

$795

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Mon 3/29

9:40 pm-10:20 am

1 stop29h 40m

Sofia

Mon 4/12

3:50 pm-3:30 pm

1 stop30h 40m

$797

BostonSofia

BOS Boston Logan Intl - SOF Sofia

BOSSOF

Boston Logan Intl

Tue 2/23

2:20 pm-11:50 am

2 stops14h 30m

Sofia

Tue 3/9

7:55 am-1:30 pm

1 stop12h 35m

$798

Flights are sorted by cheapest round-trip flights first.

Sorted 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 $438 to $781.
The lowest price recently found on this route was $584.

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 $461, 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 April instead. Flights to Sofia in April, while not as cheap as those in February, still average around $556.

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 $745 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 64% 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 2% more expensive 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	$584
Fastest flight time	9h 55m
Direct flights	None

The best flight deal from Boston to Sofia found on momondo in the last 72 hours is $584

The fastest flight from Boston to Sofia takes 9h 55m

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 9h 55m.
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 33% of the total bookings. Other popular airlines include Turkish Airlines with 16%, KLM 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 7.5 984 reviews	Search Austrian Airlines flights
Air France	PriceFrom $396	Free Cancellation	Rating 7.5 1,653 reviews	Search Air France flights
KLM	PriceFrom $403	Free Cancellation	Rating 7.8 1,595 reviews	Search KLM flights
United Airlines	PriceFrom $405	Free Cancellation	Rating 7.3 10,454 reviews	Search United Airlines flights
SWISS	PriceFrom $410	Free Cancellation	Rating 7.5 2,114 reviews	Search SWISS flights
Lufthansa	PriceFrom $418	Free Cancellation	Rating 6.8 8,297 reviews	Search Lufthansa flights
British Airways	PriceFrom $421	Free Cancellation	Rating 6.7 8,275 reviews	Search British Airways flights
Turkish Airlines	PriceFrom $527	Free Cancellation	Rating 7.4 4,461 reviews	Search Turkish Airlines flights
ITA Airways	PriceFrom $694	Free Cancellation	Rating 6.8 1,411 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

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Cheap flights from Boston to Sofia from $584

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Sofia departing on 2/24. 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

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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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