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$279+ 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
nov. 28 — déc. 51
ven. 11/28
ven. 12/5
1 adult, Economy
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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 octobre 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 11/168:40 pmBOS - SOF
1 stop14h 40mLufthansa
ven. 12/52:00 pmSOF - BOS
1 stop11h 35mLufthansa
Deal found 10/28$349
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/175:30 amBOS - SOF
2 stops29h 50mMultiple Airlines
mer. 12/32:00 pmSOF - BOS
2 stops14h 27mMultiple Airlines
Deal found 10/29$366
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
mer. 11/198:40 pmBOS - SOF
2 stops14h 20mLufthansa
mer. 12/32:00 pmSOF - BOS
1 stop11h 35mLufthansa
Deal found 10/29$368
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
dim. 11/236:25 pmBOS - SOF
1 stop10h 25mAustrian Airlines
lun. 12/112:35 pmSOF - BOS
1 stop32h 30mAustrian Airlines
Deal found 10/29$380
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/178:40 pmBOS - SOF
1 stop14h 40mLufthansa
mer. 12/32:00 pmSOF - BOS
1 stop11h 35mLufthansa
Deal found 10/29$386
This FlightHub deal was found by Cheapflights users on 10/29. 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.
dim. 11/236:25 pmBOS - SOF
1 stop10h 25mMultiple Airlines
mer. 12/32:00 pmSOF - BOS
1 stop11h 35mMultiple Airlines
Deal found 10/29$392
This FlightHub deal was found by Cheapflights users on 10/29. 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.
mer. 11/261:00 pmBOS - SOF
2 stops15h 50mMultiple Airlines
mer. 12/32:00 pmSOF - BOS
1 stop11h 35mMultiple Airlines
Deal found 10/29$395
This Air Canada deal was found by Cheapflights users on 10/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 11/163:40 pmBOS - SOF
2 stops19h 40mAir Canada
ven. 12/56:05 amSOF - BOS
2 stops23h 32mAir Canada
Deal found 10/28$399
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/261:00 pmBOS - SOF
2 stops22h 20mUnited Airlines
mer. 12/36:05 amSOF - BOS
2 stops37h 07mUnited Airlines
Deal found 10/29$403
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
ven. 11/286:25 pmBOS - SOF
1 stop10h 25mAustrian Airlines
ven. 12/57:55 amSOF - BOS
1 stop13h 10mAustrian Airlines
Deal found 10/29$405

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 octobre 29, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$340
(Kiwi.com)

One-way from

$279
(Mytrip)

Popular in

December

Cheapest in

October

Average price

$534
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. 8% potential increase in price ($72 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 octobre 29, 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

mer. 11/19

8:40 pm-6:00 pm

2 stops14h 20m

Sofia

mer. 12/3

2:00 pm-6:35 pm

1 stop11h 35m

$368

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

dim. 11/16

12:59 pm-1:00 pm

2 stops17h 01m

Sofia

ven. 12/5

7:55 am-2:05 pm

1 stop13h 10m

$392

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

ven. 11/28

6:25 pm-11:50 am

1 stop10h 25m

Sofia

ven. 12/5

7:55 am-2:05 pm

1 stop13h 10m

$405

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mar. 1/27

7:10 pm-2:05 pm

1 stop11h 55m

Sofia

mar. 2/10

7:10 am-1:40 pm

1 stop13h 30m

$408

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mar. 1/27

9:30 am-6:20 pm

3 stops25h 50m

Sofia

mar. 2/10

7:55 am-6:32 pm

2 stops17h 37m

$408

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mer. 11/19

4:20 pm-6:00 pm

1 stop18h 40m

Sofia

mer. 12/3

2:00 pm-6:35 pm

1 stop11h 35m

$416

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mar. 12/30

6:25 pm-11:50 am

1 stop10h 25m

Sofia

mer. 1/7

6:45 pm-6:57 pm

2 stops31h 12m

$433

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

lun. 12/1

5:30 am-1:15 pm

2 stops24h 45m

Sofia

sam. 2/28

2:00 pm-6:35 pm

1 stop11h 35m

$444

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mar. 11/18

9:50 pm-6:20 pm

2 stops13h 30m

Sofia

mar. 12/2

6:00 am-2:52 pm

2 stops15h 52m

$446

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

lun. 12/1

6:15 am-10:45 pm

2 stops33h 30m

Sofia

sam. 2/28

6:25 am-1:35 pm

1 stop14h 10m

$458

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 25 results
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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 $356). Flying from Boston to Bulgaria in May is currently the most expensive (average of $652). 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 octobre 29, 2025.

It’s typically best to fly out from Boston to Bulgaria in the afternoon. Doing so could potentially save you 15% on the flight price compared to flying in the evening, which is usually more expensive.

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 octobre 29, 2025.
See what other customers who have flown with KLM, United Airlines, and Turkish 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
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,406 reviews
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,001 reviews
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Turkish Airlines
7.3
Good
4,031 reviews
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,539 reviews
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,485 reviews
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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 10h 25m. Lufthansa provides one of the quickest options available for as low as $405. There are 4521 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 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 $356). Flying from Boston to Bulgaria in May is currently the most expensive (average of $652). 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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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 octobre 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest$355Average$575FlexibilityNo cancel feeOn-time78%
KLMCheapest$410Average$734FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$416Average$609FlexibilityNo cancel feeOn-time77%
SWISSCheapest$436Average$724FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$472Average$800FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$479Average$841FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$505Average$924FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$510Average$564FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$520Average$955FlexibilityNo cancel feeOn-time77%

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