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$242+ Cheap flights from Boston (BOS) to Sofia (SOF)

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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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The best prices from Boston Logan Intl to Sofia are usually found in October or March, booked 12 days in advance, depart on a Tuesday or Saturday and return on a Thursday

Cheap flight deals from Boston to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$501
(oojo)

One-way from

$242
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$786
Provider with most accurate pricing for Boston Logan Intl-Sofia flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Sofia flights.
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From Boston Logan Intl to Sofia
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One-way flight from Boston Logan Intl to Sofia
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Highest demand for flights based on searches. 4% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from Boston to Sofia

Cheapest flights from Boston to Sofia
Explore the most affordable flight options available from Boston to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This oojo deal was found by Cheapflights users on 2/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/189:00 pmBOS - SOF
1 stop17h 50mTurkish Airlines
Tue 4/13:35 pmSOF - BOS
1 stop35h 05mTurkish Airlines
Deal found 2/20$501
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/107:25 pmBOS - SOF
1 stop15h 45mAmerican Airlines
Mon 3/245:25 pmSOF - BOS
1 stop26h 40mAmerican Airlines
Deal found 2/19$531
This British Airways deal was found by Cheapflights users on 2/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/117:25 pmBOS - SOF
1 stop12h 45mBritish Airways
Tue 3/256:05 pmSOF - BOS
1 stop26h 55mBritish Airways
Deal found 2/20$533
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/189:40 pmBOS - SOF
1 stop19h 05mUnited Airlines
Wed 4/26:15 amSOF - BOS
2 stops15h 42mUnited Airlines
Deal found 2/20$534
This Air Canada deal was found by Cheapflights users on 2/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1110:50 amBOS - SOF
2 stops20h 35mAir Canada
Tue 3/252:15 pmSOF - BOS
2 stops25h 24mAir Canada
Deal found 2/20$542
This Lufthansa deal was found by Cheapflights users on 2/19. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/105:15 pmBOS - SOF
1 stop14h 20mLufthansa
Mon 3/246:55 pmSOF - BOS
1 stop30h 40mLufthansa
Deal found 2/19$556
This KLM deal was found by Cheapflights users on 2/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/208:05 pmBOS - SOF
1 stop12h 00mKLM
Thu 3/277:00 amSOF - BOS
1 stop13h 25mKLM
Deal found 2/20$584
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/2010:50 amBOS - SOF
2 stops20h 35mMultiple Airlines
Thu 3/276:45 pmSOF - BOS
1 stop26h 25mMultiple Airlines
Deal found 2/20$586
This StudentUniverse deal was found by Cheapflights users on 2/20. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/195:05 pmBOS - SOF
2 stops18h 35mSWISS
Tue 9/21:15 pmSOF - BOS
1 stop13h 40mSWISS
Deal found 2/20$870
This Air Serbia deal was found by Cheapflights users on 2/20. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/291:45 pmBOS - SOF
2 stops18h 50mAir Serbia
Mon 9/294:05 pmSOF - BOS
2 stops30h 16mAir Serbia
Deal found 2/20$921

Find flights from Boston to Sofia within your budget

Customize your flight search to find flights from Boston to Sofia 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 February 20, 2025.

Fly from

Boston

Fly to

Sofia

Route

Depart

Return

Price

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 3/18

9:00 pm-8:50 pm

1 stop17h 50m

Sofia

Tue 4/1

3:35 pm-7:40 pm

1 stop35h 05m

$501

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Mon 3/10

7:25 pm-5:10 pm

1 stop15h 45m

Sofia

Mon 3/24

5:25 pm-2:05 pm

1 stop26h 40m

$531

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 3/11

7:25 pm-2:10 pm

1 stop12h 45m

Sofia

Tue 3/25

6:05 pm-3:00 pm

1 stop26h 55m

$533

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 3/18

9:40 pm-10:45 pm

1 stop19h 05m

Sofia

Wed 4/2

6:15 am-2:57 pm

2 stops15h 42m

$534

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 3/11

10:50 am-1:25 pm

2 stops20h 35m

Sofia

Tue 3/25

2:15 pm-9:39 am

2 stops25h 24m

$542

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Mon 3/10

5:15 pm-1:35 pm

1 stop14h 20m

Sofia

Mon 3/24

6:55 pm-7:35 pm

1 stop30h 40m

$556

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Thu 3/20

8:05 pm-2:05 pm

1 stop12h 00m

Sofia

Thu 3/27

7:00 am-2:25 pm

1 stop13h 25m

$584

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Thu 3/20

10:50 am-1:25 pm

2 stops20h 35m

Sofia

Thu 3/27

6:45 pm-3:10 pm

1 stop26h 25m

$586

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Tue 8/19

5:05 pm-6:40 pm

2 stops18h 35m

Sofia

Tue 9/2

1:15 pm-7:55 pm

1 stop13h 40m

$870

BostonSofia

BOS - SOF

BOSSOF

Boston Logan Intl

Sun 8/17

1:45 pm-3:35 pm

2 stops42h 50m

Sofia

Mon 9/8

4:05 pm-3:21 pm

2 stops30h 16m

$958

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 22 results
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Compare providers for flights from Boston to Sofia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Sofia in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 stars
SmartFaresPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Sofia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Sofia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Sofia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia 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.

Travel insights for flights from Boston to Sofia

Get recent, data-driven insights about flights from Boston to Sofia including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from Boston to Sofia. Price data was last updated on February 14, 2025.

The best time to book flights from Boston to Sofia is 12 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, November is the cheapest month in which you can book a flight from Boston to Sofia (average of $632). Flying from Boston to Sofia in June is currently the most expensive (average of $1,243). 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 SOF?

Find hourly flight availability from Boston to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

When flying from Boston to Sofia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 21% versus a flight in the morning.

Rainfall in Sofia by month

Plan your trip to Sofia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sofia ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sofia when rainfall is around 1.2 in.

Temperature in Sofia by month

Plan your trip to Sofia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sofia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. 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 Sofia. Reviews last updated February 20, 2025.
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,333 reviews
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Austrian Airlines
7.6
Good
773 reviews
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

United Airlines
7.4
Good
8,766 reviews
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Turkish Airlines
7.3
Good
3,832 reviews
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,333 reviews

Crew

8.4

Food

7.3

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Related info for your journey

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

  • What are the cheapest airlines flying from Boston to Sofia round-trip?

    Turkish Airlines, at $501, was found to be the cheapest airline from Boston to Sofia.Alternate airlines to your destination round-trip include American Airlines and British Airways. Turkish Airlines is 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • Where are the most common layover locations when flying from Boston to Sofia?

    Flights departing from Boston and landing in Sofia layover in Frankfurt am Main most frequently.

  • What are some popular things to do or see while on a layover in Frankfurt am Main?

    Most Frankfurt am Main visitors opt to spend their time experiencing Römerberg, Hauptwache, and Römer. Travelers on a layover in Frankfurt am Main can visit Römerberg, Hauptwache, and Römer, by traveling 7.4 mi, 7.4 mi, and 7.4 mi, respectively after landing at Frankfurt am Main. Those looking to explore during their layover in Frankfurt am Main can rent a car from Frankfurt am Main for about $44 per day.

  • Where are the least popular layover locations for Boston to Sofia flights?

    The least popular layover on flights from Boston to Sofia is Munich.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston to Sofia 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 Sofia?

    Currently, November is the cheapest month in which you can book a flight from Boston to Sofia (average of $632). Flying from Boston to Sofia in June is currently the most expensive (average of $1,243). 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 Sofia

See prices for flight routes from nearby airports that may be better suited for you.
Hartford to Sofia flights

Top 8 airlines flying from Boston to Sofia

Discover the top 8 airlines that operate flights from Boston to Sofia. 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$515Average$602FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$548Average$887FlexibilityNo cancel feeOn-time70%
SWISSCheapest$558Average$906FlexibilityNo cancel feeOn-time79%
KLMCheapest$624Average$871FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$667Average$993FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$668Average$1,023FlexibilityNo cancel feeOn-time69%
ITA AirwaysCheapest$725Average$865FlexibilityNo cancel feeOn-time81%
Austrian AirlinesCheapest$775Average$983FlexibilityNo cancel feeOn-time78%
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