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$322+ 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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
ene. 13 — ene. 201
mar. 1/13
mar. 1/20
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 diciembre 14, 2025.

This United Airlines deal was found by Cheapflights users on 12/12. 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.
mié. 12/172:15 pmBOS - SOF
2 stops25h 30mUnited Airlines
mar. 2/177:55 amSOF - BOS
1 stop13h 10mUnited Airlines
Deal found 12/12$1,099
This United Airlines deal was found by Cheapflights users on 12/13. 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.
mié. 12/318:40 pmBOS - SOF
2 stops19h 05mUnited Airlines
dom. 1/46:10 amSOF - BOS
2 stops42h 52mUnited Airlines
Deal found 12/13$1,358
This Air France deal was found by Cheapflights users on 12/13. 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.
mié. 12/1710:15 amBOS - SOF
2 stops20h 50mAir France
mar. 2/177:10 amSOF - BOS
1 stop16h 10mAir France
Deal found 12/13$1,423
This Air France deal was found by Cheapflights users on 12/13. 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.
mié. 12/1710:15 amBOS - SOF
2 stops20h 50mMultiple Airlines
mar. 2/177:00 amSOF - BOS
2 stops19h 58mMultiple Airlines
Deal found 12/13$1,434
This Mytrip deal was found by Cheapflights users on 12/13. 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.
mié. 12/315:30 amBOS - SOF
3 stops35h 25mMultiple Airlines
dom. 1/47:05 pmSOF - BOS
3 stops29h 45mMultiple Airlines
Deal found 12/13$1,438
This United Airlines deal was found by Cheapflights users on 12/11. 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.
jue. 12/257:44 pmBOS - SOF
2 stops44h 01mUnited Airlines
sáb. 1/36:25 amSOF - BOS
2 stops42h 37mUnited Airlines
Deal found 12/11$1,463
This United Airlines deal was found by Cheapflights users on 12/12. 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.
vie. 12/194:20 pmBOS - SOF
2 stops23h 25mUnited Airlines
mar. 1/62:00 pmSOF - BOS
2 stops51h 36mUnited Airlines
Deal found 12/12$1,491
This Gurufare deal was found by Cheapflights users on 12/12. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/227:44 pmBOS - SOF
2 stops34h 31mMultiple Airlines
mié. 1/72:00 pmSOF - BOS
2 stops37h 00mMultiple Airlines
Deal found 12/12$1,559
This Gurufare deal was found by Cheapflights users on 12/12. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/227:44 pmBOS - SOF
2 stops34h 31mLufthansa
mié. 1/72:25 pmSOF - BOS
1 stop30h 00mLufthansa
Deal found 12/12$1,569

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 diciembre 14, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$346
(Kiwi.com)

One-way from

$322
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$773
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. 14% potential increase in price ($124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 diciembre 14, 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

mié. 1/21

9:50 pm-3:15 pm

1 stop10h 25m

Sofia

mié. 1/28

6:05 am-6:02 pm

2 stops18h 57m

$385

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

lun. 1/19

8:40 pm-10:45 pm

1 stop19h 05m

Sofia

mié. 2/4

6:05 am-10:37 pm

2 stops23h 32m

$389

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mié. 1/28

2:20 pm-1:15 pm

2 stops15h 55m

Sofia

mié. 2/11

2:00 pm-6:35 pm

1 stop11h 35m

$396

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mié. 1/21

6:30 pm-2:05 pm

1 stop12h 35m

Sofia

mar. 1/27

7:10 am-1:40 pm

1 stop13h 30m

$396

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

lun. 1/19

8:40 pm-10:45 pm

1 stop19h 05m

Sofia

mié. 2/4

2:00 pm-6:35 pm

1 stop11h 35m

$397

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mar. 1/20

1:00 pm-1:55 pm

2 stops17h 55m

Sofia

mié. 1/28

7:00 am-1:30 pm

1 stop13h 30m

$401

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mié. 1/28

2:20 pm-1:15 pm

2 stops15h 55m

Sofia

mié. 2/11

7:55 am-5:14 pm

2 stops16h 19m

$402

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mié. 1/28

8:40 pm-10:45 pm

1 stop19h 05m

Sofia

vie. 2/13

7:55 am-2:05 pm

1 stop13h 10m

$404

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

lun. 1/26

1:30 pm-1:15 pm

2 stops16h 45m

Sofia

vie. 2/13

7:55 am-2:05 pm

1 stop13h 10m

$408

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

mar. 1/27

1:31 pm-1:15 pm

2 stops16h 44m

Sofia

vie. 2/13

7:55 am-2:05 pm

1 stop13h 10m

$408

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Showing 1-10 of 27 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 $609). 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 diciembre 14, 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 diciembre 14, 2025.
See what other customers who have flown with KLM, Austrian Airlines, and United 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
1,430 reviews

Overall

7.7

Comfort

7.6

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,430 reviews
KLM
7.7
Good
1,430 reviews

Overall

7.7

Comfort

7.6

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Austrian Airlines
7.6
Good
879 reviews
KLM
7.7
Good
1,430 reviews

Overall

7.7

Comfort

7.6

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,092 reviews
KLM
7.7
Good
1,430 reviews

Overall

7.7

Comfort

7.6

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Turkish Airlines
7.3
Good
4,097 reviews
KLM
7.7
Good
1,430 reviews

Overall

7.7

Comfort

7.6

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,628 reviews
KLM
7.7
Good
1,430 reviews

Overall

7.7

Comfort

7.6

Food

7.2

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 12h 35m. Lufthansa provides one of the quickest options available for as low as $396. 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 cheapest airlines to fly from Boston to Bulgaria one-way?

    To fly one-way, consider booking your trip with Air France, which is currently one of the cheapest options available, starting at $288. Lufthansa flights start at $374 while deals on Austrian Airlines start at $409 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 $356). Flying from Boston to Bulgaria in May is currently the most expensive (average of $609). 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 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 diciembre 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest$356Average$556FlexibilityNo cancel feeOn-time78%
KLMCheapest$379Average$570FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$416Average$562FlexibilityNo cancel feeOn-time77%
SWISSCheapest$417Average$717FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$439Average$761FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$449Average$807FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$482Average$540FlexibilityNo cancel feeOn-time70%
ITA AirwaysCheapest$505Average$924FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$535Average$950FlexibilityNo cancel feeOn-time77%

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