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$299+ Cheap flights from Boston (BOS) to Bulgaria

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
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Cheap flight deals from Boston to Bulgaria

Cheapest flights from Boston to Bulgaria
Explore the most affordable flight options available from Boston to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.

This Turkish Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/79:50 pm
BOS
-
VAR
1 stop27h 40m
Turkish Airlines
Mon 9/149:20 am
VAR
-
BOS
1 stop17h 35m
Turkish Airlines
Deal found 7/25$699
This CheapOair deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/299:50 pm
BOS
-
VAR
1 stop16h 35m
Turkish Airlines
Sun 10/119:20 am
VAR
-
BOS
1 stop17h 35m
Turkish Airlines
Deal found 7/24$709
This CheapOair deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/269:50 pm
BOS
-
VAR
1 stop27h 40m
Turkish Airlines
Sat 10/310:15 pm
VAR
-
BOS
1 stop28h 40m
Turkish Airlines
Deal found 7/26$724
This Turkish Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:50 pm
BOS
-
VAR
1 stop16h 30m
Turkish Airlines
Fri 10/210:20 pm
VAR
-
BOS
1 stop28h 35m
Turkish Airlines
Deal found 7/26$749
This Turkish Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/269:50 pm
BOS
-
VAR
1 stop27h 40m
Turkish Airlines
Mon 10/59:20 am
VAR
-
BOS
1 stop17h 35m
Turkish Airlines
Deal found 7/26$764
This CheapOair deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:50 pm
BOS
-
VAR
1 stop27h 40m
Turkish Airlines
Wed 9/910:15 pm
VAR
-
BOS
1 stop28h 40m
Turkish Airlines
Deal found 7/24$782
This Turkish Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/79:50 pm
BOS
-
VAR
1 stop27h 40m
Turkish Airlines
Tue 9/159:20 am
VAR
-
BOS
1 stop17h 35m
Turkish Airlines
Deal found 7/24$786
This Turkish Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:50 pm
BOS
-
VAR
1 stop16h 35m
Turkish Airlines
Fri 9/1810:20 pm
VAR
-
BOS
1 stop28h 35m
Turkish Airlines
Deal found 7/24$812
This FlightHub deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/299:50 pm
BOS
-
VAR
1 stop27h 40m
Turkish Airlines
Wed 9/910:15 pm
VAR
-
BOS
1 stop28h 40m
Turkish Airlines
Deal found 7/27$822
This Turkish Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:50 pm
BOS
-
VAR
1 stop16h 35m
Turkish Airlines
Tue 9/159:20 am
VAR
-
BOS
1 stop17h 35m
Turkish Airlines
Deal found 7/24$826
This Mytrip deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:40 am
BOS
-
SOF
3 stops31h 00m
Multiple Airlines
Wed 9/305:15 pm
SOF
-
BOS
2 stops28h 30m
Multiple Airlines
Deal found 7/27$827
This Mytrip deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1911:00 pm
BOS
-
SOF
2 stops20h 35m
Multiple Airlines
Sat 10/39:50 pm
SOF
-
BOS
2 stops23h 50m
Multiple Airlines
Deal found 7/27$828

Find flight deals from Boston to Bulgaria

Keep the following information in mind while searching for Boston to Bulgaria flight deals. Data was last updated July 28, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$699
(Turkish Airlines)

One-way from

$299
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$839
Provider with most accurate pricing for Boston Logan Intl-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Sofia flights.
Search Deals
From Boston Logan Intl to Bulgaria
Search Deals
One-way flight from Boston Logan Intl to Bulgaria
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($182 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Bulgaria that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
Use the filters below to find and compare flights from Boston to Bulgaria that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Mon 9/7

9:50 pm-8:30 am

1 stop27h 40m

Varna

Mon 9/14

9:20 am-7:55 pm

1 stop17h 35m

$699

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Thu 9/24

9:50 pm-9:30 pm

1 stop16h 40m

Varna

Sat 10/3

10:00 am-7:55 pm

1 stop16h 55m

$749

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Sat 9/26

9:50 pm-8:30 am

1 stop27h 40m

Varna

Wed 9/30

9:20 am-7:55 pm

1 stop17h 35m

$764

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Mon 8/31

9:50 pm-8:30 am

1 stop27h 40m

Varna

Wed 9/9

10:10 pm-7:55 pm

1 stop28h 45m

$812

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Sun 8/30

9:50 pm-8:20 pm

1 stop15h 30m

Sofia

Mon 9/28

9:10 pm-7:55 pm

1 stop29h 45m

$851

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Fri 8/28

9:50 pm-8:30 am

1 stop27h 40m

Varna

Wed 9/9

10:10 pm-7:55 pm

1 stop28h 45m

$852

BostonBurgas

BOS - BOJ

BOSBOJ

Boston Logan Intl

Wed 9/2

5:10 pm-3:15 pm

1 stop15h 05m

Bourgas

Tue 9/8

1:05 pm-1:50 pm

1 stop31h 45m

$888

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Wed 10/14

12:30 pm-12:10 pm

2 stops16h 40m

Sofia

Fri 10/23

8:00 am-1:50 pm

1 stop12h 50m

$889

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Sun 10/25

6:00 am-1:10 pm

2 stops25h 10m

Sofia

Sun 11/8

6:00 am-10:17 am

2 stops35h 17m

$891

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Wed 8/12

8:05 pm-6:40 pm

1 stop15h 35m

Sofia

Mon 8/31

3:40 pm-3:10 pm

1 stop30h 30m

$893

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 43 resultsSorted by cheapest first
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Best time to book a flight from Boston to Bulgaria

Have a flexible travel schedule? Discover the best time to fly to Bulgaria from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Bulgaria

What is the cheapest month to book a flight from Boston to Bulgaria?

Currently, November is the cheapest month in which you can book a flight from Boston to Bulgaria (average of $456). Flying from Boston to Bulgaria in June is currently the most expensive (average of $974). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How far ahead should I book a flight from Boston to Bulgaria?

Booking 56 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston to Bulgaria. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Bulgaria

Get insights into the airlines that provide service to Bulgaria. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bulgaria. Reviews last updated July 28, 2026.
See what other customers who have flown with KLM,Austrian Airlines, andTurkish Airlines from Boston to Bulgaria have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,550 reviews
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Austrian Airlines
7.6
Good
950 reviews
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Turkish Airlines
7.4
Good
4,455 reviews
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
10,051 reviews
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
8,164 reviews
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Entertainment

7.2

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from Boston to Bulgaria. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boston to Bulgaria?

    If you book a flight to Bulgaria from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston.

  • How long is the flight from Boston to Bulgaria?

    A quick flight from Boston to Bulgaria can take about 15h 05m. Turkish Airlines provides one of the quickest options available for as low as $888. There are 4693 mi between Boston and Bulgaria. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Boston to Bulgaria one-way?

    To fly one-way, consider booking your trip with Austrian Airlines, which is currently one of the cheapest options available, starting at $211. KLM flights start at $218 while deals on Lufthansa start at $335 one-way.

  • What are the most popular routes from Boston to Bulgaria?

    The most popular flight routes from Boston to Bulgaria are Boston Logan Intl - Sofia, Boston Logan Intl - Varna and Boston Logan Intl - Bourgas.

  • Can I find deals for flights from Boston to Bulgaria that include hotel bookings?

    Yes. In addition to deals on Boston to Bulgaria flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Bulgaria?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Bulgaria.

  • Can I find deals for business class flights from Boston to Bulgaria?

    Yes. Cheapflights offers flight deals from Boston to Bulgaria by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Bulgaria?

    Currently, November is the cheapest month in which you can book a flight from Boston to Bulgaria (average of $456). Flying from Boston to Bulgaria in June is currently the most expensive (average of $974). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 9 airlines flying from Boston to Bulgaria

Discover the top 9 airlines that operate flights from Boston to Bulgaria. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest$356Average$474FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$394Average$703FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$395Average$735FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$396Average$495FlexibilityNo cancel feeOn-time77%
KLMCheapest$403Average$553FlexibilityNo cancel feeOn-time75%
SWISSCheapest$410Average$668FlexibilityNo cancel feeOn-time79%
British AirwaysCheapest$421Average$534FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$514Average$748FlexibilityNo cancel feeOn-time77%
ITA AirwaysCheapest$694Average$1,034FlexibilityNo cancel feeOn-time81%

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