$262+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
May 14 — May 211
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 April 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 April 14, 2026.
This FlightHub deal was found by Cheapflights users on 4/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/79:50 pm
BOS
- SOF
1 stop27h 55m
Turkish Airlines
Wed 10/213:50 pm
SOF
- BOS
1 stop35h 05m
Turkish Airlines
Deal found 4/9![Turkish Airlines logo]()
$515
This FlightHub deal was found by Cheapflights users on 4/10. 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.
Tue 4/289:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Tue 5/53:50 pm
SOF
- BOS
1 stop35h 05m
Turkish Airlines
Deal found 4/10![Turkish Airlines logo]()
$517
This FlightHub deal was found by Cheapflights users on 4/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:50 pm
BOS
- SOF
1 stop27h 55m
Turkish Airlines
Thu 10/19:35 am
SOF
- BOS
1 stop17h 20m
Turkish Airlines
Deal found 4/12![Turkish Airlines logo]()
$536
This FlightHub deal was found by Cheapflights users on 4/14. 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.
Wed 10/149:50 pm
BOS
- SOF
1 stop15h 25m
Turkish Airlines
Wed 10/2810:05 am
SOF
- BOS
1 stop15h 00m
Turkish Airlines
Deal found 4/14![Turkish Airlines logo]()
$537
This oojo deal was found by Cheapflights users on 4/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Wed 10/149:05 pm
SOF
- BOS
1 stop29h 50m
Turkish Airlines
Deal found 4/11![Turkish Airlines logo]()
$545
This Justfly.com deal was found by Cheapflights users on 4/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/259:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Fri 5/82:05 pm
SOF
- BOS
1 stop12h 50m
Turkish Airlines
Deal found 4/12![Turkish Airlines logo]()
$548
This FlightHub deal was found by Cheapflights users on 4/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Mon 10/269:40 pm
SOF
- BOS
1 stop27h 25m
Turkish Airlines
Deal found 4/11![Turkish Airlines logo]()
$574
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
Tue 10/139:50 pm
BOS
- SOF
1 stop15h 25m
Turkish Airlines
Tue 10/2710:05 am
SOF
- BOS
1 stop15h 00m
Turkish Airlines
Deal found 4/14![Turkish Airlines logo]()
$577
This FlightHub deal was found by Cheapflights users on 4/14. 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.
Thu 10/159:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Tue 10/274:00 pm
SOF
- BOS
1 stop33h 05m
Turkish Airlines
Deal found 4/14![Turkish Airlines logo]()
$590
This Justfly.com deal was found by Cheapflights users on 4/10. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:50 pm
BOS
- SOF
1 stop15h 25m
Turkish Airlines
Wed 10/289:40 pm
SOF
- BOS
1 stop27h 25m
Turkish Airlines
Deal found 4/10![Turkish Airlines logo]()
$591
This FlightHub deal was found by Cheapflights users on 4/10. 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.
Sun 10/119:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Sun 10/254:00 pm
SOF
- BOS
1 stop33h 05m
Turkish Airlines
Deal found 4/10![Turkish Airlines logo]()
$592
This KAYAK deal was found by Cheapflights users on 4/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/119:50 pm
BOS
- SOF
1 stop15h 25m
Turkish Airlines
Thu 10/2910:05 am
SOF
- BOS
1 stop15h 00m
Turkish Airlines
Deal found 4/10![Turkish Airlines logo]()
$597
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 April 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 April 14, 2026.
This United Airlines deal was found by Cheapflights users on 4/10. 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 10/118:05 pm
BOS
- SOF
1 stop20h 10m
United Airlines
Thu 10/296:00 am
SOF
- BOS
2 stops22h 37m
United Airlines
Deal found 4/10![United Airlines logo]()
$655
This KLM deal was found by Cheapflights users on 4/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/74:40 pm
BOS
- SOF
1 stop14h 20m
KLM
Tue 8/257:00 am
SOF
- BOS
1 stop16h 37m
KLM
Deal found 4/11![KLM logo]()
$743
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Mon 9/78:05 pm
BOS
- SOF
1 stop20h 10m
United Airlines
Mon 9/212:20 pm
SOF
- BOS
2 stops38h 07m
United Airlines
Deal found 4/9![United Airlines logo]()
$677
This KLM deal was found by Cheapflights users on 4/13. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:35 pm
BOS
- SOF
2 stops17h 25m
KLM
Tue 8/257:00 am
SOF
- BOS
1 stop16h 37m
KLM
Deal found 4/13![KLM logo]()
$747
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Wed 8/58:05 pm
BOS
- SOF
1 stop20h 10m
United Airlines
Wed 8/266:10 am
SOF
- BOS
2 stops24h 44m
United Airlines
Deal found 4/14![United Airlines logo]()
$710
This United Airlines deal was found by Cheapflights users on 4/10. 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.
Tue 7/148:05 pm
BOS
- SOF
1 stop20h 10m
United Airlines
Tue 8/256:10 am
SOF
- BOS
1 stop18h 30m
United Airlines
Deal found 4/10![United Airlines logo]()
$729
This United Airlines deal was found by Cheapflights users on 4/12. 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.
Thu 8/138:05 pm
BOS
- SOF
1 stop15h 35m
United Airlines
Sun 8/306:10 am
SOF
- BOS
2 stops24h 44m
United Airlines
Deal found 4/12![United Airlines logo]()
$767
This United Airlines deal was found by Cheapflights users on 4/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:27 pm
BOS
- SOF
2 stops20h 48m
United Airlines
Sun 5/108:00 am
SOF
- BOS
2 stops18h 04m
United Airlines
Deal found 4/11![United Airlines logo]()
$798
This United Airlines deal was found by Cheapflights users on 4/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/102:22 pm
BOS
- SOF
2 stops14h 48m
United Airlines
Sun 5/178:00 am
SOF
- BOS
2 stops33h 18m
United Airlines
Deal found 4/11![United Airlines logo]()
$808
This United Airlines deal was found by Cheapflights users on 4/12. 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.
Sat 8/297:25 pm
BOS
- SOF
2 stops33h 45m
United Airlines
Sun 9/136:20 am
SOF
- BOS
2 stops34h 35m
United Airlines
Deal found 4/12![United Airlines logo]()
$808
Last-minute flights from Boston to SofiaDiscover last-minute flight deals from Boston to Sofia. Data last updated April 14, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Sofia. Data last updated April 14, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 4/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/259:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Fri 5/82:05 pm
SOF
- BOS
1 stop12h 50m
Turkish Airlines
Deal found 4/12![Turkish Airlines logo]()
$548
This Kiwi.com deal was found by Cheapflights users on 4/11. 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.
Sat 4/258:59 pm
BOS
- SOF
2 stops34h 01m
Air France
Fri 5/87:00 am
SOF
- BOS
1 stop13h 25m
Air France
Deal found 4/11![Air France logo]()
$606
This FlightHub deal was found by Cheapflights users on 4/10. 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.
Tue 4/289:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Tue 5/53:50 pm
SOF
- BOS
1 stop35h 05m
Turkish Airlines
Deal found 4/10![Turkish Airlines logo]()
$517
This Air France deal was found by Cheapflights users on 4/10. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/281:30 pm
BOS
- SOF
2 stops17h 30m
Air France
Tue 5/57:00 am
SOF
- BOS
1 stop13h 25m
Air France
Deal found 4/10![Air France logo]()
$622
This Air Canada deal was found by Cheapflights users on 4/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2810:40 am
BOS
- SOF
2 stops18h 00m
Multiple Airlines
Tue 5/512:55 pm
SOF
- BOS
2 stops15h 32m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$627
This oojo deal was found by Cheapflights users on 4/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/39:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Sun 5/172:05 pm
SOF
- BOS
1 stop12h 50m
Turkish Airlines
Deal found 4/11![Turkish Airlines logo]()
$612
This oojo deal was found by Cheapflights users on 4/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/49:50 pm
BOS
- SOF
1 stop34h 10m
Turkish Airlines
Mon 5/189:05 pm
SOF
- BOS
1 stop29h 50m
Turkish Airlines
Deal found 4/12![Turkish Airlines logo]()
$603
This Air France deal was found by Cheapflights users on 4/14. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:10 pm
BOS
- SOF
1 stop13h 50m
Multiple Airlines
Wed 5/207:00 am
SOF
- BOS
2 stops16h 00m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$658
This Air France deal was found by Cheapflights users on 4/10. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/121:29 pm
BOS
- SOF
2 stops17h 31m
Multiple Airlines
Tue 5/267:00 am
SOF
- BOS
1 stop16h 25m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$652
This Air France deal was found by Cheapflights users on 4/13. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:15 pm
BOS
- SOF
1 stop13h 45m
Multiple Airlines
Wed 5/207:00 am
SOF
- BOS
1 stop13h 10m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$647
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 April 14, 2026.
Search for one-way flight options from Boston to Sofia. Find affordable one-way fares based on user searches. Data last updated April 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/11. 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.
Sat 4/258:50 pm
BOS
- SOF
3 stops35h 55m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 4/11. 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 4/2611:00 pm
BOS
- SOF
3 stops40h 30m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 4/10. 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.
Sun 9/208:50 pm
BOS
- SOF
3 stops21h 25m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 4/11. 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.
Wed 4/228:50 pm
BOS
- SOF
3 stops30h 30m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$357
This FlightHub deal was found by Cheapflights users on 4/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:20 pm
BOS
- SOF
1 stop11h 55m
SWISS
Deal found 4/12![SWISS logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1811:00 pm
BOS
- SOF
2 stops53h 50m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$380
This Mytrip deal was found by Cheapflights users on 4/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:05 pm
BOS
- SOF
1 stop20h 10m
Lufthansa
Deal found 4/10![Lufthansa logo]()
$383
This Mytrip deal was found by Cheapflights users on 4/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/269:40 pm
BOS
- SOF
1 stop10h 15m
SWISS
Deal found 4/11![SWISS logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 4/11. 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.
Sat 9/198:50 pm
BOS
- SOF
2 stops36h 00m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$392
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 April 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $515 (FlightHub) |
One-way from | $262 (Kiwi.com) |
Popular in | May |
Cheapest in | February |
Average price | $608 |
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 April 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 - SOF
BOSSOF
Boston Logan Intl
Sun 10/11
8:05 pm-11:15 pm
1 stop20h 10m
Sofia
Thu 10/29
6:00 am-10:37 pm
2 stops22h 37m
$655
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Mon 9/7
8:05 pm-11:15 pm
1 stop20h 10m
Sofia
Mon 9/21
2:20 pm-9:27 pm
2 stops38h 07m
$677
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Wed 8/5
8:05 pm-11:15 pm
1 stop20h 10m
Sofia
Wed 8/26
6:10 am-11:54 pm
2 stops24h 44m
$710
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Tue 7/14
8:05 pm-11:15 pm
1 stop20h 10m
Sofia
Tue 8/25
6:10 am-5:40 pm
1 stop18h 30m
$729
Quickest round-trip
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Tue 7/7
4:40 pm-2:00 pm
1 stop14h 20m
Sofia
Tue 8/25
7:00 am-4:37 pm
1 stop16h 37m
$743
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Tue 7/14
1:35 pm-2:00 pm
2 stops17h 25m
Sofia
Tue 8/25
7:00 am-4:37 pm
1 stop16h 37m
$747
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Thu 8/13
8:05 pm-6:40 pm
1 stop15h 35m
Sofia
Sun 8/30
6:10 am-11:54 pm
2 stops24h 44m
$767
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Thu 4/30
7:27 pm-11:15 pm
2 stops20h 48m
Sofia
Sun 5/10
8:00 am-7:04 pm
2 stops18h 04m
$798
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sun 5/10
2:22 pm-12:10 pm
2 stops14h 48m
Sofia
Sun 5/17
8:00 am-10:18 am
2 stops33h 18m
$808
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sat 8/29
7:25 pm-12:10 pm
2 stops33h 45m
Sofia
Sun 9/13
6:20 am-9:55 am
2 stops34h 35m
$808
Showing 1-10 of 18 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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- 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
How far ahead should I book a flight from Boston to Sofia?
Use this chart to determine the optimal time to book a round-trip flight from Boston to Sofia. Price data was last updated on April 10, 2026.
The best time to book flights from Boston to Sofia is 70 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, April is the cheapest month in which you can book a flight from Boston to Sofia (average of $386). Flying from Boston to Sofia in May is currently the most expensive (average of $532). 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?
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 April 14, 2026.
Peruse reviews from past customers who have flown with KLM,Air France, 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.
Comfort
7.7
Crew
8.4
Boarding
7.8
Overall
7.8
Food
7.3
Entertainment
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Comfort
7.7
Crew
8.4
Boarding
7.8
Overall
7.8
Food
7.3
Entertainment
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Comfort
7.7
Crew
8.4
Boarding
7.8
Overall
7.8
Food
7.3
Entertainment
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Comfort
7.7
Crew
8.4
Boarding
7.8
Overall
7.8
Food
7.3
Entertainment
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Comfort
7.7
Crew
8.4
Boarding
7.8
Overall
7.8
Food
7.3
Entertainment
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Comfort
7.7
Crew
8.4
Boarding
7.8
Overall
7.8
Food
7.3
Entertainment
7.2
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
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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Complete your trip
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Search flights from Boston to Sofia by cabin class
Find flights from Boston to Sofia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and Sofia flights
Browse other Boston and Sofia flight options. Last updated on April 14, 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 April 14, 2026.
Popular flight searches
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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 April 14, 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 April 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$380 | Average$489 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$388 | Average$554 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$394 | Average$622 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$396 | Average$495 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$415 | Average$698 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$418 | Average$699 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$478 | Average$540 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$505 | Average$903 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$524 | Average$685 | FlexibilityNo cancel fee | On-time77% |