$299+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
Aug 28 — Sep 41
Round-trip
1 adult, Economy
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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 July 29, 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 July 29, 2026.
This Mytrip deal was found by Cheapflights users on 7/27. 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.
Wed 9/1610:40 am
BOS
- SOF
3 stops31h 00m
Multiple Airlines
Wed 9/305:15 pm
SOF
- BOS
2 stops28h 30m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$827
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/2011:35 pm
BOS
- SOF
1 stop19h 00m
Multiple Airlines
Thu 9/1012:15 pm
SOF
- BOS
2 stops15h 50m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$828
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 11/65:50 pm
BOS
- SOF
1 stop16h 10m
Multiple Airlines
Sun 11/1510:30 am
SOF
- BOS
2 stops16h 25m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$829
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/319:50 pm
BOS
- SOF
1 stop15h 30m
Multiple Airlines
Wed 9/309:40 pm
SOF
- BOS
2 stops24h 05m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$830
This Turkish Airlines deal was found by Cheapflights users on 7/27. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:50 pm
BOS
- SOF
1 stop27h 55m
Turkish Airlines
Thu 10/19:35 am
SOF
- BOS
1 stop17h 20m
Turkish Airlines
Deal found 7/27![Turkish Airlines logo]()
$831
This Cheapflightsfares deal was found by Cheapflights users on 7/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/172:40 pm
BOS
- SOF
2 stops20h 20m
Austrian Airlines
Tue 12/17:55 am
SOF
- BOS
1 stop12h 35m
Austrian Airlines
Deal found 7/28![Austrian Airlines logo]()
$834
This Mytrip deal was found by Cheapflights users on 7/28. 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.
Sat 8/295:40 pm
BOS
- SOF
2 stops14h 25m
Multiple Airlines
Fri 9/411:40 am
SOF
- BOS
2 stops34h 55m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$835
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 11/69:00 pm
BOS
- SOF
1 stop31h 05m
Turkish Airlines
Sun 11/159:40 am
SOF
- BOS
1 stop15h 25m
Turkish Airlines
Deal found 7/29![Turkish Airlines logo]()
$836
This Mytrip deal was found by Cheapflights users on 7/27. 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 8/248:50 pm
BOS
- SOF
2 stops18h 40m
Multiple Airlines
Mon 8/316:45 pm
SOF
- BOS
3 stops34h 00m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$837
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 11/108:40 pm
BOS
- SOF
1 stop14h 40m
Multiple Airlines
Sun 11/229:35 pm
SOF
- BOS
2 stops29h 20m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$838
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 10/238:50 pm
BOS
- SOF
2 stops33h 10m
Multiple Airlines
Sun 11/14:55 pm
SOF
- BOS
1 stop29h 35m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$839
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 9/25:10 pm
BOS
- SOF
1 stop10h 10m
Multiple Airlines
Wed 9/309:40 pm
SOF
- BOS
2 stops24h 05m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$840
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 July 29, 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 July 29, 2026.
This Mytrip deal was found by Cheapflights users on 7/29. 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.
Fri 9/183:35 pm
BOS
- SOF
3 stops23h 55m
Multiple Airlines
Sat 10/36:45 pm
SOF
- BOS
3 stops32h 35m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$828
This Turkish Airlines deal was found by Cheapflights users on 7/29. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/149:50 pm
BOS
- SOF
1 stop30h 55m
Turkish Airlines
Sat 10/249:10 pm
SOF
- BOS
1 stop28h 55m
Turkish Airlines
Deal found 7/29![Turkish Airlines logo]()
$841
This United Airlines deal was found by Cheapflights users on 7/25. 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 11/2412:00 pm
BOS
- SOF
2 stops18h 15m
United Airlines
Fri 12/47:55 am
SOF
- BOS
2 stops24h 11m
United Airlines
Deal found 7/25![United Airlines logo]()
$841
This SWISS deal was found by Cheapflights users on 7/29. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:10 pm
BOS
- SOF
2 stops12h 00m
SWISS
Wed 9/211:05 am
SOF
- BOS
1 stop15h 50m
SWISS
Deal found 7/29![SWISS logo]()
$877
This FlightHub deal was found by Cheapflights users on 7/26. 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.
Mon 1/181:30 pm
BOS
- SOF
2 stops27h 25m
Multiple Airlines
Sun 1/312:00 pm
SOF
- BOS
2 stops16h 54m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$885
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Mon 10/1212:30 pm
BOS
- SOF
2 stops16h 40m
United Airlines
Fri 10/238:00 am
SOF
- BOS
1 stop12h 50m
United Airlines
Deal found 7/27![United Airlines logo]()
$889
This United Airlines deal was found by Cheapflights users on 7/28. 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 10/3010:30 am
BOS
- SOF
2 stops20h 45m
United Airlines
Fri 11/137:55 am
SOF
- BOS
2 stops16h 32m
United Airlines
Deal found 7/28![United Airlines logo]()
$891
This United Airlines deal was found by Cheapflights users on 7/25. 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 12/257:40 pm
BOS
- SOF
2 stops44h 05m
United Airlines
Fri 1/157:55 am
SOF
- BOS
2 stops22h 22m
United Airlines
Deal found 7/25![United Airlines logo]()
$894
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Mon 10/1212:30 pm
BOS
- SOF
2 stops16h 40m
United Airlines
Tue 10/206:10 am
SOF
- BOS
2 stops15h 31m
United Airlines
Deal found 7/27![United Airlines logo]()
$903
This United Airlines deal was found by Cheapflights users on 7/27. 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 10/1412:30 pm
BOS
- SOF
2 stops16h 40m
United Airlines
Thu 10/226:30 am
SOF
- BOS
2 stops18h 37m
United Airlines
Deal found 7/27![United Airlines logo]()
$903
Last-minute flights from Boston to SofiaDiscover last-minute flight deals from Boston to Sofia. Data last updated July 29, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Sofia. Data last updated July 29, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 7/26. 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.
Wed 8/1210:40 am
BOS
- SOF
2 stops16h 40m
Multiple Airlines
Thu 8/206:30 am
SOF
- BOS
1 stop16h 10m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$850
This Gotogate deal was found by Cheapflights users on 7/29. 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.
Sun 8/169:40 pm
BOS
- SOF
1 stop10h 15m
SWISS
Wed 9/211:05 am
SOF
- BOS
1 stop15h 50m
SWISS
Deal found 7/29![SWISS logo]()
$848
This Mytrip deal was found by Cheapflights users on 7/26. 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 8/176:05 pm
BOS
- SOF
2 stops18h 25m
Multiple Airlines
Mon 8/317:30 pm
SOF
- BOS
2 stops31h 50m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$849
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/2011:35 pm
BOS
- SOF
1 stop19h 00m
Multiple Airlines
Thu 9/1012:15 pm
SOF
- BOS
2 stops15h 50m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$828
This Mytrip deal was found by Cheapflights users on 7/27. 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 8/248:50 pm
BOS
- SOF
2 stops18h 40m
Multiple Airlines
Mon 8/316:45 pm
SOF
- BOS
3 stops34h 00m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$837
This Mytrip deal was found by Cheapflights users on 7/27. 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.
Fri 8/2810:50 am
BOS
- SOF
2 stops31h 25m
Multiple Airlines
Fri 9/116:45 pm
SOF
- BOS
2 stops27h 00m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$841
This Mytrip deal was found by Cheapflights users on 7/28. 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.
Sat 8/295:40 pm
BOS
- SOF
2 stops14h 25m
Multiple Airlines
Fri 9/411:40 am
SOF
- BOS
2 stops34h 55m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$835
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/309:50 pm
BOS
- SOF
1 stop15h 30m
Multiple Airlines
Sun 9/276:15 am
SOF
- BOS
1 stop22h 30m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$842
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/319:50 pm
BOS
- SOF
1 stop15h 30m
Multiple Airlines
Wed 9/309:40 pm
SOF
- BOS
2 stops24h 05m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$830
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 July 29, 2026.
Search for one-way flight options from Boston to Sofia. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/258:50 pm
BOS
- SOF
2 stops29h 55m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 8/2311:00 pm
BOS
- SOF
2 stops41h 40m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 8/2911:00 pm
BOS
- SOF
3 stops34h 35m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 10/298:50 pm
BOS
- SOF
3 stops32h 30m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 10/288:50 pm
BOS
- SOF
3 stops34h 15m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 10/411:00 pm
BOS
- SOF
3 stops30h 35m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 7/28. 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
BOS
- SOF
3 stops31h 40m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 11/187:50 pm
BOS
- SOF
3 stops29h 40m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$335
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 July 29, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $825 (Kiwi.com) |
One-way from | $299 (Kiwi.com) |
Popular in | May |
Cheapest in | February |
Average price | $839 |
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 2,558,603 searches. Data last updated July 29, 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 - SOF
BOSSOF
Boston Logan Intl
Fri 9/18
3:35 pm-10:30 pm
3 stops23h 55m
Sofia
Sat 10/3
6:45 pm-8:20 pm
3 stops32h 35m
$828
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Wed 10/14
9:50 pm-11:45 am
1 stop30h 55m
Sofia
Sat 10/24
9:10 pm-7:05 pm
1 stop28h 55m
$841
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Tue 11/24
12:00 pm-1:15 pm
2 stops18h 15m
Sofia
Fri 12/4
7:55 am-1:06 am
2 stops24h 11m
$841
Quickest round-trip
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sun 8/23
5:10 pm-12:10 pm
2 stops12h 00m
Sofia
Wed 9/2
11:05 am-7:55 pm
1 stop15h 50m
$877
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Mon 1/18
1:30 pm-11:55 pm
2 stops27h 25m
Sofia
Sun 1/31
2:00 pm-11:54 pm
2 stops16h 54m
$885
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Mon 10/12
12:30 pm-12:10 pm
2 stops16h 40m
Sofia
Fri 10/23
8:00 am-1:50 pm
1 stop12h 50m
$889
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Fri 10/30
10:30 am-1:15 pm
2 stops20h 45m
Sofia
Fri 11/13
7:55 am-5:27 pm
2 stops16h 32m
$891
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Fri 12/25
7:40 pm-10:45 pm
2 stops44h 05m
Sofia
Fri 1/15
7:55 am-11:17 pm
2 stops22h 22m
$894
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Mon 10/12
12:30 pm-12:10 pm
2 stops16h 40m
Sofia
Tue 10/20
6:10 am-2:41 pm
2 stops15h 31m
$903
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Wed 10/14
12:30 pm-12:10 pm
2 stops16h 40m
Sofia
Thu 10/22
6:30 am-6:07 pm
2 stops18h 37m
$903
Showing 1-10 of 20 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 July.
| 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*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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Boston-Sofia flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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
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 above average for this route at the moment.
Boston to Sofia flights typically cost between $491 and $792 in January.The cheapest round-trip price found within the last 5 days was $825 on Multiple Airlines (Jan 15-Jan 24).
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 July 29, 2026.
Peruse reviews from past customers who have flown with KLM,Turkish Airlines, andUnited 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.
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Crew
8.4
Overall
7.8
Boarding
7.8
Entertainment
7.2
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
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
Browse other Boston and Sofia flight options. Last updated on July 29, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on July 29, 2026.
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Other flights to Sofia
Explore flights to Sofia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 29, 2026.
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 2,558,603 searches. Data last updated July 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$394 | Average$548 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$394 | Average$703 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$395 | Average$600 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$396 | Average$495 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$403 | Average$553 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$410 | Average$668 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$421 | Average$534 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$524 | Average$741 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$694 | Average$1,034 | FlexibilityNo cancel fee | On-time81% |