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$392+ 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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — BOS
Aug 12 — Aug 191
Tue 8/12
Tue 8/19
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 August 7, 2025.

Round-trip from

$562
(Gotogate)

One-way from

$392
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$825
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. 2% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 7, 2025.

This Gotogate deal was found by Cheapflights users on 8/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/96:20 amSOF - BOS
2 stops34h 10mMultiple Airlines
Fri 10/246:00 amBOS - SOF
2 stops21h 05mMultiple Airlines
Deal found 8/7$562
This Gotogate deal was found by Cheapflights users on 8/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/92:00 pmSOF - BOS
2 stops26h 30mMultiple Airlines
Wed 10/86:00 amBOS - SOF
2 stops21h 05mMultiple Airlines
Deal found 8/7$567
This Gotogate deal was found by Cheapflights users on 8/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/96:20 amSOF - BOS
1 stop20h 50mLufthansa
Fri 10/108:05 pmBOS - SOF
1 stop19h 55mLufthansa
Deal found 8/7$571
This Justfly.com deal was found by Cheapflights users on 8/6. 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.
Mon 9/83:35 pmSOF - BOS
1 stop35h 05mTurkish Airlines
Mon 9/229:35 pmBOS - SOF
1 stop34h 10mTurkish Airlines
Deal found 8/6$572
This Booking.com deal was found by Cheapflights users on 8/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/66:15 amSOF - BOS
1 stop16h 40mLufthansa
Mon 9/228:05 pmBOS - SOF
1 stop15h 35mLufthansa
Deal found 8/7$576
This Gotogate deal was found by Cheapflights users on 8/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/912:00 pmSOF - BOS
1 stop15h 10mLufthansa
Wed 10/85:50 pmBOS - SOF
1 stop17h 00mLufthansa
Deal found 8/7$577
This Lufthansa deal was found by Cheapflights users on 8/7. 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.
Sun 9/76:20 amSOF - BOS
1 stop16h 40mLufthansa
Sat 9/208:05 pmBOS - SOF
1 stop19h 55mLufthansa
Deal found 8/7$579
This United Airlines deal was found by Cheapflights users on 8/7. 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 9/96:20 amSOF - BOS
2 stops39h 10mUnited Airlines
Fri 10/1012:10 pmBOS - SOF
2 stops16h 50mUnited Airlines
Deal found 8/7$582
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Sun 9/76:20 amSOF - BOS
1 stop16h 40mUnited Airlines
Sun 9/147:12 pmBOS - SOF
2 stops20h 38mUnited Airlines
Deal found 8/7$583

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 August 7, 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

Tue 9/9

6:20 am-9:30 am

2 stops34h 10m

Boston Logan Intl

Fri 10/24

6:00 am-10:05 am

2 stops21h 05m

$562

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 9/9

2:00 pm-9:30 am

2 stops26h 30m

Boston Logan Intl

Wed 10/8

6:00 am-10:05 am

2 stops21h 05m

$567

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 9/9

6:20 am-8:10 pm

1 stop20h 50m

Boston Logan Intl

Fri 10/10

8:05 pm-11:00 pm

1 stop19h 55m

$571

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Mon 9/8

3:35 pm-7:40 pm

1 stop35h 05m

Boston Logan Intl

Mon 9/22

9:35 pm-2:45 pm

1 stop34h 10m

$572

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sat 9/6

6:15 am-3:55 pm

1 stop16h 40m

Boston Logan Intl

Mon 9/22

8:05 pm-6:40 pm

1 stop15h 35m

$576

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 9/9

12:00 pm-8:10 pm

1 stop15h 10m

Boston Logan Intl

Wed 10/8

5:50 pm-5:50 pm

1 stop17h 00m

$577

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sun 9/7

6:20 am-4:00 pm

1 stop16h 40m

Boston Logan Intl

Sat 9/20

8:05 pm-11:00 pm

1 stop19h 55m

$579

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 9/9

6:20 am-2:30 pm

2 stops39h 10m

Boston Logan Intl

Fri 10/10

12:10 pm-12:00 pm

2 stops16h 50m

$582

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sun 9/7

6:20 am-4:00 pm

1 stop16h 40m

Boston Logan Intl

Sun 9/14

7:12 pm-10:50 pm

2 stops20h 38m

$583

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sun 9/14

10:00 am-2:20 pm

3 stops35h 20m

$392

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Showing 1-10 of 17 results
1
2

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 August 1, 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 August 7, 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 August 7, 2025.
Read reviews from past customers who have flown SWISS, 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.
SWISS
7.6
Good
1,692 reviews

Overall

7.6

Comfort

7.4

Crew

8.2

Entertainment

6.8

Food

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Madhukar,Nov 2024

ZRH - BOM

Indian Veg food selection and quality definitely needs a better chef.
SWISS
7.6
Good
1,692 reviews
SWISS
7.6
Good
1,692 reviews

Overall

7.6

Comfort

7.4

Crew

8.2

Entertainment

6.8

Food

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Madhukar,Nov 2024

ZRH - BOM

Indian Veg food selection and quality definitely needs a better chef.
United Airlines
7.4
Good
8,916 reviews
SWISS
7.6
Good
1,692 reviews

Overall

7.6

Comfort

7.4

Crew

8.2

Entertainment

6.8

Food

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Madhukar,Nov 2024

ZRH - BOM

Indian Veg food selection and quality definitely needs a better chef.
Turkish Airlines
7.3
Good
3,934 reviews
SWISS
7.6
Good
1,692 reviews

Overall

7.6

Comfort

7.4

Crew

8.2

Entertainment

6.8

Food

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Madhukar,Nov 2024

ZRH - BOM

Indian Veg food selection and quality definitely needs a better chef.
American Airlines
7.2
Good
10,000 reviews
SWISS
7.6
Good
1,692 reviews

Overall

7.6

Comfort

7.4

Crew

8.2

Entertainment

6.8

Food

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Madhukar,Nov 2024

ZRH - BOM

Indian Veg food selection and quality definitely needs a better chef.
Air Canada
7.1
Good
9,899 reviews
SWISS
7.6
Good
1,692 reviews

Overall

7.6

Comfort

7.4

Crew

8.2

Entertainment

6.8

Food

7.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Madhukar,Nov 2024

ZRH - BOM

Indian Veg food selection and quality definitely needs a better chef.

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.

  • 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
Watertown
Waltham
Seabrook
Framingham
Lowell
Hampton Beach
Lincoln
Smithfield
Cranston
Chestnut Hill
Warwick
Peabody
Quincy
York Beach
Chelsea
Saco
Swansea
Burlington

Browse thousands of different options on Cheapflights for your next trip

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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 August 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$518Average$623FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$520Average$668FlexibilityNo cancel feeOn-time77%
SWISSCheapest$525Average$737FlexibilityNo cancel feeOn-time79%
Air FranceCheapest$538Average$637FlexibilityNo cancel feeOn-time77%
KLMCheapest$545Average$686FlexibilityNo cancel feeOn-time75%
Austrian AirlinesCheapest$567Average$678FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$573Average$698FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$576Average$721FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$819Average$878FlexibilityNo cancel feeOn-time81%

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