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$273+ Cheap flights from Sofia (SOF) to Boston (BOS)

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — BOS
Oct 22 — Oct 291
Wed 10/22
Wed 10/29
1 adult, Economy
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Cheapflights Tip: The best prices from Sofia to Boston Logan Intl are usually found in January or September, booked 28 days in advance, depart on a Thursday or Monday and return on a Tuesday

Cheap flight deals from Sofia to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Boston (BOS). 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 September 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$501
(Kiwi.com)

One-way from

$273
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$624
Provider with most accurate pricing for Sofia-Boston Logan Intl flight deals.
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Provider most trusted by Cheapflights users for Sofia-Boston Logan Intl flights.
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From Sofia to Boston Logan Intl
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One-way flight from Sofia to Boston Logan Intl
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Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Sofia to Boston

Cheapest flights from Sofia to Boston
Explore the most affordable flight options available from Sofia to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/24:45 pmSOF - BOS
1 stop35h 10mMultiple Airlines
Mon 11/1710:40 pmBOS - SOF
1 stop17h 50mMultiple Airlines
Deal found 9/20$501
This Trip.com deal was found by Cheapflights users on 9/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/86:00 amSOF - BOS
2 stops38h 25mMultiple Airlines
Sun 11/232:21 pmBOS - SOF
2 stops29h 34mMultiple Airlines
Deal found 9/20$543
This Kiwi.com deal was found by Cheapflights users on 9/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:00 amSOF - BOS
2 stops22h 55mMultiple Airlines
Sun 11/3010:40 pmBOS - SOF
1 stop13h 05mMultiple Airlines
Deal found 9/22$568
This Kiwi.com deal was found by Cheapflights users on 9/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:45 pmSOF - BOS
2 stops32h 30mMultiple Airlines
Fri 11/79:20 pmBOS - SOF
1 stop17h 00mMultiple Airlines
Deal found 9/21$581
This KLM deal was found by Cheapflights users on 9/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:00 amSOF - BOS
1 stop16h 30mMultiple Airlines
Wed 10/155:20 pmBOS - SOF
1 stop13h 40mMultiple Airlines
Deal found 9/21$589
This KLM deal was found by Cheapflights users on 9/22. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/147:00 amSOF - BOS
1 stop13h 20mMultiple Airlines
Wed 12/36:30 pmBOS - SOF
1 stop12h 35mMultiple Airlines
Deal found 9/22$592
This British Airways deal was found by Cheapflights users on 9/21. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/299:00 pmSOF - BOS
1 stop24h 20mBritish Airways
Fri 11/76:00 amBOS - SOF
2 stops22h 15mBritish Airways
Deal found 9/21$596

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia to Boston 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 September 22, 2025.
Use the filters below to find and compare flights from Sofia to Boston that are best for you.

Fly from

Sofia

Fly to

Boston

Route

Depart

Return

Price

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sat 11/8

6:00 am-1:25 pm

2 stops38h 25m

Boston Logan Intl

Sun 11/23

2:21 pm-2:55 am

2 stops29h 34m

$543

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sat 11/15

7:00 am-1:20 pm

1 stop13h 20m

Boston Logan Intl

Sun 11/30

6:30 pm-1:55 pm

1 stop12h 25m

$584

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Wed 10/29

7:00 am-2:20 pm

1 stop13h 20m

Boston Logan Intl

Fri 11/7

6:30 pm-1:55 pm

1 stop12h 25m

$589

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 10/7

7:00 am-4:30 pm

1 stop16h 30m

Boston Logan Intl

Tue 12/9

6:30 pm-1:55 pm

1 stop12h 25m

$589

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Wed 10/22

7:00 am-4:30 pm

1 stop16h 30m

Boston Logan Intl

Fri 11/7

6:30 pm-1:55 pm

1 stop12h 25m

$589

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 10/14

7:00 am-1:40 pm

1 stop13h 40m

Boston Logan Intl

Tue 11/4

6:30 pm-1:55 pm

1 stop12h 25m

$589

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sun 10/12

7:00 am-4:30 pm

1 stop16h 30m

Boston Logan Intl

Sat 10/25

6:20 pm-2:55 pm

1 stop13h 35m

$589

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Thu 10/2

7:00 am-4:30 pm

1 stop16h 30m

Boston Logan Intl

Wed 10/15

5:20 pm-2:00 pm

1 stop13h 40m

$589

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Wed 10/29

9:00 pm-3:20 pm

1 stop24h 20m

Boston Logan Intl

Fri 11/7

6:00 am-11:15 am

2 stops22h 15m

$596

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sat 11/15

12:05 pm-10:49 pm

2 stops17h 44m

Boston Logan Intl

Sun 11/30

3:53 pm-4:20 pm

2 stops17h 27m

$597

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/20

Showing 1-10 of 16 results
1
2

Compare providers for flights from Sofia to Boston

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 Sofia to Boston in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
MytripPrice Accuracy3 starsTrust 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 Sofia-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Boston 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 Sofia-Boston 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 Sofia to Boston

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

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

Use this chart to determine the optimal time to book a round-trip flight from Sofia to Boston. Price data was last updated on September 19, 2025.

The price you pay for your flight from Sofia to Boston may vary depending on when you book. For the best chance of a lower fare, look to book 28 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Sofia to Boston (average of $218). Flying from Sofia to Boston in July is currently the most expensive (average of $311). 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 SOF to BOS?

Find hourly flight availability from Sofia to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 22, 2025.

A simple way to save on the total cost of your ticket is to fly from Sofia to Boston in the afternoon. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Sofia to Boston?

Use this chart to determine the cheapest time to fly round-trip from Sofia to Boston. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Sofia to Boston flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. 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 Boston. Reviews last updated September 22, 2025.
Read reviews from past customers who have flown KLM, United Airlines, and Turkish Airlines from Sofia to Boston. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,387 reviews

Food

7.3

Boarding

7.8

Entertainment

7.2

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
KLM
7.8
Good
1,387 reviews
KLM
7.8
Good
1,387 reviews

Food

7.3

Boarding

7.8

Entertainment

7.2

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
United Airlines
7.4
Good
8,926 reviews
KLM
7.8
Good
1,387 reviews

Food

7.3

Boarding

7.8

Entertainment

7.2

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Turkish Airlines
7.3
Good
3,975 reviews
KLM
7.8
Good
1,387 reviews

Food

7.3

Boarding

7.8

Entertainment

7.2

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Lufthansa
6.8
Okay
7,421 reviews
KLM
7.8
Good
1,387 reviews

Food

7.3

Boarding

7.8

Entertainment

7.2

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
British Airways
6.7
Okay
7,386 reviews
KLM
7.8
Good
1,387 reviews

Food

7.3

Boarding

7.8

Entertainment

7.2

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Related info for your journey

Find useful and relevant information for your journey from Sofia to Boston. 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 Sofia to Boston round-trip?

    British Airways, at $494, was found to be the cheapest airline from Sofia to Boston.Alternate airlines to your destination round-trip include Turkish Airlines and SWISS. British Airways is priced at 27% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Sofia to Boston (average of $218). Flying from Sofia to Boston in July is currently the most expensive (average of $311). 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

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Cambridge
Medford
Hampton Beach
Watertown
Seabrook
Seekonk
Lincoln
Lowell
Smithfield
Cranston
Chestnut Hill
Warwick
Peabody
Quincy
York Beach
Swansea
Old Orchard Beach
Brockton
Waltham
Chelsea

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Top 9 airlines flying from Sofia to Boston

Discover the top 9 airlines that operate flights from Sofia to Boston. 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 September 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$494Average$629FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$520Average$668FlexibilityNo cancel feeOn-time77%
SWISSCheapest$525Average$737FlexibilityNo cancel feeOn-time79%
Air FranceCheapest$538Average$644FlexibilityNo cancel feeOn-time77%
KLMCheapest$545Average$685FlexibilityNo cancel feeOn-time75%
Austrian AirlinesCheapest$567Average$671FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$573Average$698FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$576Average$726FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$819Average$878FlexibilityNo cancel feeOn-time81%

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