HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Boston

$354+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — BOS
dic. 6 — dic. 131
sáb. 12/6
sáb. 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Sofia to Boston with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Sofia to Boston Logan Intl are usually found in January or February, booked 28 days in advance, depart on a Thursday or Monday and return on a Tuesday

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 noviembre 6, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
sáb. 11/222:25 pmSOF - BOS
2 stops16h 17mLufthansa
vie. 11/288:40 pmBOS - SOF
1 stop19h 05mLufthansa
Deal found 11/5$625
This KLM deal was found by Cheapflights users on 11/5. 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.
sáb. 11/227:00 amSOF - BOS
1 stop13h 20mMultiple Airlines
dom. 12/76:30 pmBOS - SOF
1 stop12h 25mMultiple Airlines
Deal found 11/5$633
This KLM deal was found by Cheapflights users on 11/5. 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.
sáb. 11/227:00 amSOF - BOS
1 stop13h 20mMultiple Airlines
jue. 11/276:30 pmBOS - SOF
1 stop12h 25mMultiple Airlines
Deal found 11/5$634
This KLM deal was found by Cheapflights users on 11/5. 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.
vie. 11/217:00 amSOF - BOS
2 stops16h 14mMultiple Airlines
vie. 11/286:30 pmBOS - SOF
1 stop12h 25mMultiple Airlines
Deal found 11/5$639
This KLM deal was found by Cheapflights users on 11/5. 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.
vie. 11/217:00 amSOF - BOS
2 stops16h 14mKLM
jue. 11/273:05 pmBOS - SOF
2 stops16h 00mKLM
Deal found 11/5$645
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
sáb. 11/227:55 amSOF - BOS
2 stops16h 41mAustrian Airlines
dom. 12/76:25 pmBOS - SOF
1 stop10h 25mAustrian Airlines
Deal found 11/5$648
This KLM deal was found by Cheapflights users on 11/5. 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.
jue. 11/207:00 amSOF - BOS
1 stop13h 20mKLM
mié. 12/107:05 pmBOS - SOF
1 stop12h 00mKLM
Deal found 11/5$658
This United Airlines deal was found by Cheapflights users on 11/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/206:00 amSOF - BOS
1 stop14h 25mUnited Airlines
mié. 12/109:30 amBOS - SOF
2 stops30h 15mUnited Airlines
Deal found 11/6$659

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 noviembre 6, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$493
(Kiwi.com)

One-way from

$354
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$688
Provider with most accurate pricing for Sofia-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Boston Logan Intl flights.
Search Deals
From Sofia to Boston Logan Intl
Search Deals
One-way flight from Sofia to Boston Logan Intl
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 noviembre 6, 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

lun. 3/16

5:55 am-9:55 pm

2 stops22h 00m

Boston Logan Intl

lun. 3/23

11:40 pm-10:10 pm

1 stop16h 30m

$617

SofiaBoston

SOF - BOS

SOFBOS

Sofia

sáb. 11/22

7:00 am-1:20 pm

1 stop13h 20m

Boston Logan Intl

jue. 11/27

6:30 pm-1:55 pm

1 stop12h 25m

$634

SofiaBoston

SOF - BOS

SOFBOS

Sofia

vie. 11/21

7:00 am-1:40 pm

1 stop13h 40m

Boston Logan Intl

jue. 11/27

6:30 pm-1:55 pm

1 stop12h 25m

$639

SofiaBoston

SOF - BOS

SOFBOS

Sofia

jue. 3/12

7:00 am-2:20 pm

1 stop13h 20m

Boston Logan Intl

jue. 3/19

8:10 pm-2:05 pm

1 stop11h 55m

$640

SofiaBoston

SOF - BOS

SOFBOS

Sofia

sáb. 3/14

7:00 am-6:23 pm

2 stops17h 23m

Boston Logan Intl

jue. 3/19

8:10 pm-2:05 pm

1 stop11h 55m

$646

SofiaBoston

SOF - BOS

SOFBOS

Sofia

vie. 3/13

2:00 pm-7:35 pm

1 stop11h 35m

Boston Logan Intl

vie. 3/20

9:40 pm-6:20 pm

1 stop14h 40m

$647

SofiaBoston

SOF - BOS

SOFBOS

Sofia

vie. 3/13

7:00 am-7:55 pm

1 stop18h 55m

Boston Logan Intl

sáb. 3/21

7:30 pm-1:55 pm

1 stop12h 25m

$652

SofiaBoston

SOF - BOS

SOFBOS

Sofia

sáb. 11/22

7:55 am-9:27 pm

2 stops20h 32m

Boston Logan Intl

dom. 12/7

5:30 am-6:20 pm

2 stops29h 50m

$652

SofiaBoston

SOF - BOS

SOFBOS

Sofia

jue. 3/12

6:00 am-2:10 pm

1 stop14h 10m

Boston Logan Intl

vie. 3/20

9:40 pm-6:20 pm

1 stop14h 40m

$654

SofiaBoston

SOF - BOS

SOFBOS

Sofia

mar. 4/14

6:10 am-3:55 pm

1 stop16h 45m

Boston Logan Intl

mié. 10/21

8:05 pm-6:40 pm

1 stop15h 35m

$654

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 15 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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Sofia-Boston flight deals on Cheapflights vs. Mytrip >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 Mytrip the most. Mytrip 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 October 31, 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, March is the cheapest month in which you can book a flight from Sofia to Boston (average of $517). Flying from Sofia to Boston in August is currently the most expensive (average of $592). 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 noviembre 6, 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 Friday 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.

How much does it cost to fly round-trip from Sofia to Boston?

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 noviembre 6, 2025.
Read reviews from past customers who have flown KLM, Air France, and United 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
7.7
Good
1,405 reviews

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,405 reviews
KLM
7.7
Good
1,405 reviews

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Air France
7.4
Good
1,484 reviews
KLM
7.7
Good
1,405 reviews

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,004 reviews
KLM
7.7
Good
1,405 reviews

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Turkish Airlines
7.3
Good
4,032 reviews
KLM
7.7
Good
1,405 reviews

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,558 reviews
KLM
7.7
Good
1,405 reviews

Overall

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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.

  • How long is the flight from Sofia to Boston?

    Air France and KLM can get you from Sofia to Boston in just under 13h 20m. Your travel time can differ by up to 20m. There are 4521 mi between Sofia and Boston. This flight may include one or multiple stops.

  • 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 Air France. British Airways is priced at 28% 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, March is the cheapest month in which you can book a flight from Sofia to Boston (average of $517). Flying from Sofia to Boston in August is currently the most expensive (average of $592). 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
Peabody
Quincy
York Beach
Warwick
Swansea
Old Orchard Beach
Brockton
Waltham
Chelsea

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Other flights to Boston

Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on noviembre 6, 2025.
Raleigh to Boston flights
Atlanta to Boston flights
Cleveland to Boston flights
Sarasota to Boston flights
Orlando to Boston flights
Fort Lauderdale to Boston flights
Boston to Grand Rapids flights
Boston to Knoxville flights
Boston to Grand Rapids flights
Boston to Cleveland flights
Boston to Cleveland flights
Boston to Massena flights
Boston to Asheville flights
Boston to Chicago Midway Airport flights
Boston to Chicago O'Hare Intl Airport flights
Boston to Sarasota flights
Boston to Syracuse flights
Boston to Fort Lauderdale flights
Boston to Raleigh flights
Boston to Des Moines flights
Boston to New York John F Kennedy Intl Airport flights
Boston to Saranac Lake flights
Boston to Newark Airport flights
Boston to Orlando Airport flights

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 noviembre 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$494Average$688FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$533Average$690FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$538Average$709FlexibilityNo cancel feeOn-time77%
KLMCheapest$556Average$661FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$580Average$734FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$583Average$716FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$588Average$671FlexibilityNo cancel feeOn-time78%
SWISSCheapest$594Average$746FlexibilityNo cancel feeOn-time79%
ITA AirwaysCheapest$819Average$878FlexibilityNo cancel feeOn-time81%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.