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Bulgaria

$327+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
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 March 22, 2026.

This FlightHub deal was found by Cheapflights users on 3/17. 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 4/89:50 pm
BOS
-
SOF
1 stop34h 10m
Turkish Airlines
Wed 4/229:35 am
SOF
-
BOS
1 stop17h 20m
Turkish Airlines
Deal found 3/17$512
This FlightHub deal was found by Cheapflights users on 3/21. 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 4/229:50 pm
BOS
-
SOF
1 stop32h 25m
Turkish Airlines
Wed 5/69:35 am
SOF
-
BOS
1 stop17h 20m
Turkish Airlines
Deal found 3/21$514
This FlightHub deal was found by Cheapflights users on 3/20. 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 4/289:50 pm
BOS
-
SOF
1 stop15h 25m
Turkish Airlines
Tue 5/199:35 am
SOF
-
BOS
1 stop17h 20m
Turkish Airlines
Deal found 3/20$516
This FlightHub deal was found by Cheapflights users on 3/21. 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 3/319:50 pm
BOS
-
VAR
1 stop16h 30m
Turkish Airlines
Mon 5/113:45 am
VAR
-
BOS
1 stop23h 10m
Turkish Airlines
Deal found 3/21$517
This oojo deal was found by Cheapflights users on 3/17. 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.
Thu 4/99:50 pm
BOS
-
SOF
1 stop34h 10m
Turkish Airlines
Wed 4/229:05 pm
SOF
-
BOS
1 stop29h 50m
Turkish Airlines
Deal found 3/17$518
This oojo deal was found by Cheapflights users on 3/22. 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.
Wed 4/89:50 pm
BOS
-
SOF
1 stop34h 10m
Turkish Airlines
Wed 4/299:05 pm
SOF
-
BOS
1 stop29h 50m
Turkish Airlines
Deal found 3/22$520
This FlightHub deal was found by Cheapflights users on 3/17. 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 4/69:50 pm
BOS
-
SOF
1 stop34h 10m
Turkish Airlines
Fri 4/179:35 am
SOF
-
BOS
1 stop17h 20m
Turkish Airlines
Deal found 3/17$521
This FlightHub deal was found by Cheapflights users on 3/17. 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.
Sun 4/269:50 pm
BOS
-
SOF
1 stop15h 25m
Turkish Airlines
Mon 5/49:35 am
SOF
-
BOS
1 stop17h 20m
Turkish Airlines
Deal found 3/17$524
This Justfly.com deal was found by Cheapflights users on 3/18. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/299:50 pm
BOS
-
SOF
1 stop15h 25m
Turkish Airlines
Tue 4/149:35 am
SOF
-
BOS
1 stop17h 20m
Turkish Airlines
Deal found 3/18$525
This FlightHub deal was found by Cheapflights users on 3/20. 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 4/259:50 pm
BOS
-
SOF
1 stop34h 10m
Turkish Airlines
Thu 4/309:35 am
SOF
-
BOS
1 stop17h 20m
Turkish Airlines
Deal found 3/20$528
This oojo deal was found by Cheapflights users on 3/19. 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 3/319:50 pm
BOS
-
SOF
1 stop14h 55m
Turkish Airlines
Mon 4/69:05 pm
SOF
-
BOS
1 stop29h 50m
Turkish Airlines
Deal found 3/19$530
This oojo deal was found by Cheapflights users on 3/22. 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 4/129:50 pm
BOS
-
VAR
1 stop27h 55m
Turkish Airlines
Wed 5/1310:10 pm
VAR
-
BOS
1 stop28h 45m
Turkish Airlines
Deal found 3/22$537

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 March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$514
(FlightHub)

One-way from

$278
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$597
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. 16% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 22, 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

Sun 4/12

9:50 pm-8:45 am

1 stop27h 55m

Varna

Thu 5/14

10:10 pm-7:55 pm

1 stop28h 45m

$537

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 5/5

7:27 pm-6:40 pm

2 stops16h 13m

Sofia

Tue 5/12

8:00 am-7:26 pm

2 stops18h 26m

$577

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Tue 4/14

8:05 pm-3:15 pm

2 stops36h 10m

Varna

Tue 5/12

4:00 pm-1:50 pm

1 stop28h 50m

$583

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Tue 4/14

9:50 pm-9:20 pm

1 stop16h 30m

Varna

Thu 5/14

10:10 pm-7:55 pm

1 stop28h 45m

$584

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 7/14

5:45 pm-1:05 pm

1 stop12h 20m

Sofia

Tue 8/25

6:10 am-11:20 pm

2 stops24h 10m

$635

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 7/7

10:40 am-6:00 pm

2 stops24h 20m

Sofia

Tue 8/25

2:10 pm-2:45 pm

2 stops31h 35m

$639

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Tue 4/14

5:10 pm-3:15 pm

1 stop15h 05m

Varna

Tue 5/19

4:00 pm-1:50 pm

1 stop28h 50m

$640

BostonVarna

BOS - VAR

BOSVAR

Boston Logan Intl

Wed 4/29

9:50 pm-9:20 pm

1 stop16h 30m

Varna

Sun 5/3

9:35 am-7:55 pm

1 stop17h 20m

$652

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 8/4

8:05 pm-11:00 pm

1 stop19h 55m

Sofia

Tue 8/25

2:10 pm-11:54 pm

2 stops16h 44m

$653

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Sat 8/15

7:25 pm-12:10 pm

2 stops33h 45m

Sofia

Sat 8/29

6:10 am-5:40 pm

1 stop18h 30m

$665

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 48 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 $356). Flying from Boston to Bulgaria in May is currently the most expensive (average of $553). 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.

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 March 22, 2026.
See what other customers who have flown with KLM,Austrian Airlines, andUnited 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
1,477 reviews

Entertainment

7.1

Overall

7.8

Comfort

7.6

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,477 reviews
KLM
7.8
Good
1,477 reviews

Entertainment

7.1

Overall

7.8

Comfort

7.6

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Austrian Airlines
7.6
Good
902 reviews
KLM
7.8
Good
1,477 reviews

Entertainment

7.1

Overall

7.8

Comfort

7.6

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,459 reviews
KLM
7.8
Good
1,477 reviews

Entertainment

7.1

Overall

7.8

Comfort

7.6

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Turkish Airlines
7.3
Good
4,272 reviews
KLM
7.8
Good
1,477 reviews

Entertainment

7.1

Overall

7.8

Comfort

7.6

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Lufthansa
6.8
Okay
7,862 reviews
KLM
7.8
Good
1,477 reviews

Entertainment

7.1

Overall

7.8

Comfort

7.6

Boarding

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 16h 13m. Turkish Airlines provides one of the quickest options available for as low as $577. 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 Austrian Airlines, which is currently one of the cheapest options available, starting at $229. Lufthansa flights start at $335 while deals on KLM start at $385 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 $553). 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

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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 March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest$356Average$510FlexibilityNo cancel feeOn-time78%
KLMCheapest$380Average$471FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$396Average$494FlexibilityNo cancel feeOn-time77%
SWISSCheapest$410Average$685FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$415Average$696FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$421Average$702FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$478Average$540FlexibilityNo cancel feeOn-time70%
ITA AirwaysCheapest$505Average$768FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$507Average$600FlexibilityNo cancel feeOn-time77%

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