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Bulgaria

$239+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap 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 30, 2025.

Round-trip from

$418
(Kiwi.com)

One-way from

$239
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$829
From Boston Logan Intl to Bulgaria
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One-way flight from Boston Logan Intl to Bulgaria
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Highest demand for flights based on searches. 4% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 30, 2025.

This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/319:40 pmBOS - SOF
1 stop31h 50mSWISS
Tue 9/301:15 pmSOF - BOS
1 stop33h 10mSWISS
Deal found 7/30$435
This FlightHub deal was found by Cheapflights users on 7/29. 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.
Wed 8/276:40 pmBOS - SOF
2 stops16h 10mMultiple Airlines
Mon 9/153:30 pmSOF - BOS
1 stop30h 55mMultiple Airlines
Deal found 7/29$438
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/125:10 pmBOS - SOF
1 stop18h 00mAustrian Airlines
Fri 9/198:00 amSOF - BOS
1 stop12h 50mAustrian Airlines
Deal found 7/29$442
This FlightHub deal was found by Cheapflights users on 7/29. 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.
Mon 12/18:40 pmBOS - SOF
1 stop19h 05mLufthansa
Sat 2/287:05 pmSOF - BOS
1 stop30h 30mLufthansa
Deal found 7/29$443
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/255:05 pmBOS - SOF
2 stops11h 55mUnited Airlines
Tue 9/96:20 amSOF - BOS
2 stops18h 35mUnited Airlines
Deal found 7/28$446
This FlightHub deal was found by Cheapflights users on 7/30. 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.
Tue 9/238:05 pmBOS - VAR
1 stop17h 40mLufthansa
Wed 10/19:30 pmVAR - BOS
1 stop27h 10mLufthansa
Deal found 7/30$452
This Air Canada deal was found by Cheapflights users on 7/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/316:40 pmBOS - SOF
2 stops35h 20mAir Canada
Tue 9/3012:00 pmSOF - BOS
2 stops28h 55mAir Canada
Deal found 7/30$455
This British Airways deal was found by Cheapflights users on 7/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/309:35 pmBOS - SOF
1 stop11h 45mBritish Airways
Sat 12/2012:05 pmSOF - BOS
1 stop14h 40mBritish Airways
Deal found 7/29$461
This oojo deal was found by Cheapflights users on 7/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/231:38 pmBOS - VAR
2 stops18h 37mAustrian Airlines
Wed 10/14:00 pmVAR - BOS
2 stops32h 54mAustrian Airlines
Deal found 7/29$467
This Air France deal was found by Cheapflights users on 7/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:20 pmBOS - SOF
1 stop13h 40mAir France
Fri 10/247:00 amSOF - BOS
1 stop15h 05mAir France
Deal found 7/29$471
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/85:10 pmBOS - VAR
1 stop15h 05mMultiple Airlines
Sat 9/276:20 pmVAR - BOS
2 stops54h 20mMultiple Airlines
Deal found 7/29$488
This FlightHub deal was found by Cheapflights users on 7/30. 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.
Thu 9/189:35 pmBOS - SOF
1 stop34h 10mTurkish Airlines
Thu 10/29:15 pmSOF - BOS
1 stop29h 25mTurkish Airlines
Deal found 7/30$492

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 30, 2025.
Use the filters below to find and compare flights from Boston to Bulgaria that are best for you.

Fly from

Boston

Fly to

Bulgaria

Route

Depart

Return

Price

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Sun 8/31

9:40 pm-12:30 pm

1 stop31h 50m

Sofia

Tue 9/30

1:15 pm-3:25 pm

1 stop33h 10m

$435

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Wed 8/27

6:40 pm-5:50 pm

2 stops16h 10m

Sofia

Mon 9/15

3:30 pm-3:25 pm

1 stop30h 55m

$438

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Fri 9/12

5:10 pm-6:10 pm

1 stop18h 00m

Sofia

Fri 9/19

8:00 am-1:50 pm

1 stop12h 50m

$442

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Mon 12/1

8:40 pm-10:45 pm

1 stop19h 05m

Sofia

Sat 2/28

7:05 pm-6:35 pm

1 stop30h 30m

$443

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Mon 8/25

5:05 pm-12:00 pm

2 stops11h 55m

Sofia

Tue 9/9

6:20 am-5:55 pm

2 stops18h 35m

$446

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Tue 9/23

8:05 pm-8:45 pm

1 stop17h 40m

Varna

Wed 10/1

9:30 pm-5:40 pm

1 stop27h 10m

$452

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Sun 8/31

6:40 pm-1:00 pm

2 stops35h 20m

Sofia

Tue 9/30

12:00 pm-9:55 am

2 stops28h 55m

$455

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Sun 11/30

9:35 pm-4:20 pm

1 stop11h 45m

Sofia

Sat 12/20

12:05 pm-7:45 pm

1 stop14h 40m

$461

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Tue 9/23

1:38 pm-3:15 pm

2 stops18h 37m

Varna

Wed 10/1

4:00 pm-5:54 pm

2 stops32h 54m

$467

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Thu 10/16

5:20 pm-2:00 pm

1 stop13h 40m

Sofia

Fri 10/24

7:00 am-3:05 pm

1 stop15h 05m

$471

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 26 results
1
2
3

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 $632). Flying from Boston to Bulgaria in June is currently the most expensive (average of $1,187). 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.

What is the cheapest time of day to fly from BOS to BG?

Find hourly flight availability from Boston to Bulgaria. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

When flying from Boston to Bulgaria, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 30, 2025.
See what other customers who have flown with KLM, Austrian Airlines, and Air France 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
1,383 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Austrian Airlines
7.6
Good
823 reviews
KLM
7.8
Good
1,383 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air France
7.5
Good
1,465 reviews
KLM
7.8
Good
1,383 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
SWISS
7.5
Good
1,686 reviews
KLM
7.8
Good
1,383 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,896 reviews
KLM
7.8
Good
1,383 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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.

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

    To fly one-way, consider booking your trip with Lufthansa, which is currently one of the cheapest options available, starting at $357. Austrian Airlines flights start at $383 while deals on KLM start at $386 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 $632). Flying from Boston to Bulgaria in June is currently the most expensive (average of $1,187). 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

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Alternative routes for Boston to Bulgaria

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Top 8 airlines flying from Boston to Bulgaria

Discover the top 8 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$416Average$725FlexibilityNo cancel feeOn-time77%
SWISSCheapest$437Average$771FlexibilityNo cancel feeOn-time79%
KLMCheapest$457Average$818FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$505Average$819FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$510Average$570FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$511Average$919FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$572Average$927FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$637Average$890FlexibilityNo cancel feeOn-time78%

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