$307+ Cheap flights from Boston (BOS) to Sofia (SOF)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
Oct 14 — Oct 211
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Sofia 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.Cheap flight deals from Boston to Sofia
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Best
Last-minute
One-way
Cheapest flights from Boston to SofiaExplore 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 September 14, 2026.
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 September 14, 2026.
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Mon 10/510:40 am -
3 stops29h 35m
Mon 10/195:00 am -
3 stops19h 40m
Deal found 9/14![Multiple Airlines logo]()
$806
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Mon 11/29:50 pm -
2 stops19h 05m
Mon 11/164:00 pm -
3 stops29h 53m
Deal found 9/12![Multiple Airlines logo]()
$820
This Orbitz deal was found by Cheapflights users on 9/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:05 pm -
1 stop15h 35m
Sun 9/276:55 pm -
1 stop25h 55m
Deal found 9/10![Multiple Airlines logo]()
$822
This oojo deal was found by Cheapflights users on 9/10. 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.
Sat 10/108:05 pm -
1 stop20h 10m
Fri 10/167:25 pm -
1 stop29h 15m
Deal found 9/10![Lufthansa logo]()
$823
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 9/305:45 pm -
1 stop12h 40m
Sat 10/101:55 pm -
1 stop13h 15m
Deal found 9/10![United Airlines logo]()
$824
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 9/255:10 pm -
2 stops12h 00m
Tue 10/136:10 am -
2 stops15h 31m
Deal found 9/10![United Airlines logo]()
$825
This Gotogate deal was found by Cheapflights users on 9/10. 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.
Sat 10/1010:50 am -
2 stops18h 20m
Fri 10/167:25 pm -
1 stop29h 15m
Deal found 9/10![Multiple Airlines logo]()
$827
This deal was found by Cheapflights users on 9/10. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/149:50 pm -
1 stop15h 30m
Sat 10/249:35 am -
1 stop17h 20m
Deal found 9/10![Turkish Airlines logo]()
$828
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 12/124:05 pm -
1 stop14h 20m
Sat 12/266:15 pm -
1 stop26h 15m
Deal found 9/12![Multiple Airlines logo]()
$830
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Tue 10/277:00 pm -
3 stops26h 00m
Tue 11/32:35 pm -
3 stops31h 05m
Deal found 9/12![Multiple Airlines logo]()
$832
Best flights from Boston to SofiaDiscover carefully curated flight deals from Boston to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
Discover carefully curated flight deals from Boston to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Fri 10/27:13 pm -
2 stops20h 17m
Fri 10/96:10 am -
2 stops24h 49m
Deal found 9/14![United Airlines logo]()
$823
This British Airways deal was found by Cheapflights users on 9/14. 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.
Sat 10/318:30 am -
1 stop28h 05m
Sun 11/157:45 pm -
1 stop33h 05m
Deal found 9/14![British Airways logo]()
$828
This Lufthansa deal was found by Cheapflights users on 9/14. 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.
Sat 10/319:40 pm -
1 stop19h 15m
Fri 11/132:00 pm -
1 stop11h 35m
Deal found 9/14![Lufthansa logo]()
$858
This Booking.com deal was found by Cheapflights users on 9/13. 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.
Thu 10/154:55 pm -
3 stops23h 20m
Thu 10/2911:00 pm -
2 stops29h 37m
Deal found 9/13![Multiple Airlines logo]()
$874
This British Airways deal was found by Cheapflights users on 9/12. 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.
Sun 10/189:55 pm -
1 stop14h 25m
Wed 10/219:25 pm -
1 stop32h 10m
Deal found 9/12![British Airways logo]()
$865
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Fri 10/98:05 pm -
2 stops19h 25m
Sun 10/188:00 am -
2 stops32h 33m
Deal found 9/13![United Airlines logo]()
$868
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/106:00 am -
2 stops23h 10m
Fri 10/162:10 pm -
2 stops34h 30m
Deal found 9/10![United Airlines logo]()
$873
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 12/235:45 am -
2 stops23h 05m
Wed 12/306:00 am -
1 stop19h 35m
Deal found 9/9![United Airlines logo]()
$898
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 12/235:45 am -
2 stops23h 05m
Thu 12/312:00 pm -
1 stop11h 35m
Deal found 9/10![United Airlines logo]()
$899
This United Airlines deal was found by Cheapflights users on 9/12. 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 10/1812:45 pm -
2 stops16h 25m
Wed 10/218:00 am -
1 stop12h 50m
Deal found 9/12![United Airlines logo]()
$901
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/188:05 pm -
1 stop15h 35m
Tue 10/208:00 am -
2 stops16h 52m
Deal found 9/10![United Airlines logo]()
$903
Last-minute flights from Boston to SofiaDiscover last-minute flight deals from Boston to Sofia. Data last updated September 14, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Sofia. Data last updated September 14, 2026 and is based on user searches.
This Orbitz deal was found by Cheapflights users on 9/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:05 pm -
1 stop15h 35m
Sun 9/276:55 pm -
1 stop25h 55m
Deal found 9/10![Multiple Airlines logo]()
$822
This FlightHub deal was found by Cheapflights users on 9/10. 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 9/195:10 pm -
2 stops12h 00m
Thu 10/112:55 pm -
1 stop11h 45m
Deal found 9/10![Multiple Airlines logo]()
$836
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 9/255:10 pm -
2 stops12h 00m
Tue 10/136:10 am -
2 stops15h 31m
Deal found 9/10![United Airlines logo]()
$825
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 9/305:45 pm -
1 stop12h 40m
Sat 10/101:55 pm -
1 stop13h 15m
Deal found 9/10![United Airlines logo]()
$824
This Mytrip deal was found by Cheapflights users on 9/14. 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.
Mon 10/510:40 am -
3 stops29h 35m
Mon 10/195:00 am -
3 stops19h 40m
Deal found 9/14![Multiple Airlines logo]()
$806
This oojo deal was found by Cheapflights users on 9/10. 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.
Sat 10/108:05 pm -
1 stop20h 10m
Fri 10/167:25 pm -
1 stop29h 15m
Deal found 9/10![Lufthansa logo]()
$823
This Gotogate deal was found by Cheapflights users on 9/10. 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.
Sat 10/1010:50 am -
2 stops18h 20m
Fri 10/167:25 pm -
1 stop29h 15m
Deal found 9/10![Multiple Airlines logo]()
$827
This deal was found by Cheapflights users on 9/10. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/149:50 pm -
1 stop15h 30m
Sat 10/249:35 am -
1 stop17h 20m
Deal found 9/10![Turkish Airlines logo]()
$828
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Tue 10/277:00 pm -
3 stops26h 00m
Tue 11/32:35 pm -
3 stops31h 05m
Deal found 9/12![Multiple Airlines logo]()
$832
This FlightHub deal was found by Cheapflights users on 9/14. 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 10/317:23 pm -
2 stops17h 12m
Sun 11/157:45 pm -
2 stops28h 12m
Deal found 9/14![British Airways logo]()
$834
One-way flights from Boston to SofiaSearch for one-way flight options from Boston to Sofia. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
Search for one-way flight options from Boston to Sofia. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Tue 10/67:30 pm -
3 stops37h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Thu 10/17:30 pm -
3 stops42h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/310:05 am -
3 stops52h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Fri 10/308:50 pm -
3 stops43h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/410:05 am -
3 stops28h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Tue 11/37:50 pm -
3 stops32h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Mon 11/27:50 pm -
3 stops40h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 11/45:15 pm -
1 stop22h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/25:25 pm -
2 stops22h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$331
Find 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 September 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $806 (Mytrip) |
One-way from | $307 (Kiwi.com) |
Popular in | May |
Cheapest in | February |
Average price | $872 |
Cheapflights Fare Finder
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 7,457,451 searches. Data last updated September 14, 2026.
Use the filters below to find and compare flights from Boston to Sofia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Tue 10/6
7:30 pm-4:20 pm
3 stops37h 50m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$307
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Tue 11/3
7:50 pm-11:05 am
3 stops32h 15m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$322
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Fri 10/30
8:50 pm-10:00 am
2 stops31h 10m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$328
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Mon 10/5
5:25 pm-11:40 pm
2 stops23h 15m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$336
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Fri 10/2
5:25 pm-10:30 pm
2 stops22h 05m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$355
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Sun 11/22
9:20 pm-1:40 pm
1 stop33h 20m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$356
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Sat 11/21
9:20 pm-11:20 am
2 stops55h 00m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$364
Quickest round-trip
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Sun 10/4
11:35 pm-1:35 am
1 stop19h 00m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$372
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Fri 10/2
7:13 pm-10:30 pm
2 stops20h 17m
Sofia
Fri 10/9
6:10 am-11:59 pm
2 stops24h 49m
$823
BostonSofia
BOS Boston Logan Intl - SOF Sofia
BOSSOF
Boston Logan Intl
Sat 10/31
8:30 am-6:35 pm
1 stop28h 05m
Sofia
Sun 11/15
7:45 pm-9:50 pm
1 stop33h 05m
$828
Showing 1-10 of 19 resultsSorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- 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.
BOS-SOF
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 Sofia
Prices
More
How far ahead should I book a flight from Boston to Sofia?
The best time to book flights from Boston to Sofia is 59 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, February is the cheapest month in which you can book a flight from Boston to Sofia (average of $460). Flying from Boston to Sofia in May is currently the most expensive (average of $1,006). 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.
How much does it cost to fly round-trip from Boston to Sofia?
Airfare is typical for this route at the moment.
Boston to Sofia flights typically cost between $500 and $1,007 in October.The cheapest round-trip price found within the last 5 days was $806 on Multiple Airlines (Oct 5-Oct 19).
What’s the top layover airport for flights from Boston to Sofia?
Share of 1-stop round-trip flights from Boston to Sofia chosen by Cheapflights users in the past 12 months, using the same layover each way.
Munich (MUC) – chosen by Cheapflights users on 89% of 1-stop itineraries from Boston to Sofia on Cheapflights.
What’s the cheapest layover airport for flights from Boston to Sofia?
Average round-trip fare for 1-stop flights from Boston to Sofia, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Zurich (ZRH) is the most affordable 1-stop option, with an average round-trip price of $878.
What’s the fastest layover option from Boston to Sofia?
Shortest average travel time for 1-stop one-way flights from Boston to Sofia, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Zurich (ZRH) have the shortest average one-way travel time for 1-stop routes: 12h 05m.
Which airport typically offers the quickest layover for flights from Boston to Sofia?
Average layover duration for 1-stop one-way flights from Boston to Sofia, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Zurich (ZRH) offer the fastest connection on this route, with an average layover time of 2h 35m.
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 September 14, 2026.
Peruse reviews from past customers who have flown with KLM,Austrian Airlines, andTurkish Airlines from Boston to Sofia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.7
Crew
8.4
Entertainment
7.2
Food
7.3
Overall
7.8
Boarding
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Crew
8.4
Entertainment
7.2
Food
7.3
Overall
7.8
Boarding
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Crew
8.4
Entertainment
7.2
Food
7.3
Overall
7.8
Boarding
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Crew
8.4
Entertainment
7.2
Food
7.3
Overall
7.8
Boarding
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Crew
8.4
Entertainment
7.2
Food
7.3
Overall
7.8
Boarding
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Crew
8.4
Entertainment
7.2
Food
7.3
Overall
7.8
Boarding
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
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.
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Boston and Sofia flights
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Top 9 airlines flying from Boston to Sofia
Discover the top 9 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 7,457,451 searches. Data last updated September 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$394 | Average$705 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$394 | Average$787 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$394 | Average$495 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$403 | Average$559 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$410 | Average$762 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$415 | Average$725 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$421 | Average$629 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$524 | Average$779 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$694 | Average$1,034 | FlexibilityNo cancel fee | On-time81% |