$240+ 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
Apr 12 — Apr 191
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Sofia with Cheapflights
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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
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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 March 13, 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 March 13, 2026.
This FlightHub deal was found by Cheapflights users on 3/9. 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.
Mon 3/99:40 pm
BOS
- SOF
1 stop19h 05m
Multiple Airlines
Sun 4/56:55 pm
SOF
- BOS
1 stop25h 55m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$420
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/285:10 pm
BOS
- SOF
1 stop11h 30m
Multiple Airlines
Tue 5/1212:55 pm
SOF
- BOS
1 stop11h 45m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$450
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 5/59:40 pm
BOS
- SOF
1 stop29h 40m
Multiple Airlines
Tue 5/128:00 am
SOF
- BOS
2 stops17h 20m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$452
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/288:05 pm
BOS
- SOF
2 stops14h 55m
Lufthansa
Tue 5/1212:55 pm
SOF
- BOS
1 stop11h 45m
Lufthansa
Deal found 3/8![Lufthansa logo]()
$460
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 5/59:40 pm
BOS
- SOF
1 stop29h 40m
SWISS
Tue 5/121:05 pm
SOF
- BOS
1 stop13h 50m
SWISS
Deal found 3/8![SWISS logo]()
$461
This Mytrip deal was found by Cheapflights users on 3/8. 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 3/225:30 am
BOS
- SOF
2 stops24h 20m
Multiple Airlines
Fri 4/38:00 am
SOF
- BOS
1 stop12h 50m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$464
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 9/85:10 pm
BOS
- SOF
1 stop11h 30m
Austrian Airlines
Tue 9/226:55 pm
SOF
- BOS
2 stops30h 00m
Austrian Airlines
Deal found 3/8![Austrian Airlines logo]()
$468
This Mytrip deal was found by Cheapflights users on 3/8. 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 4/225:20 pm
BOS
- SOF
1 stop10h 00m
SWISS
Wed 4/2911:05 am
SOF
- BOS
1 stop15h 50m
SWISS
Deal found 3/8![SWISS logo]()
$472
This Mytrip deal was found by Cheapflights users on 3/8. 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 4/228:05 pm
BOS
- SOF
1 stop19h 55m
Multiple Airlines
Wed 4/296:20 am
SOF
- BOS
2 stops15h 32m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$474
This SWISS deal was found by Cheapflights users on 3/8. 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.
Mon 4/65:20 pm
BOS
- SOF
1 stop11h 55m
SWISS
Mon 4/203:40 pm
SOF
- BOS
1 stop30h 30m
SWISS
Deal found 3/8![SWISS logo]()
$479
This FlightHub deal was found by Cheapflights users on 3/8. 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 4/268:05 pm
BOS
- SOF
1 stop15h 35m
Multiple Airlines
Mon 5/43:40 pm
SOF
- BOS
1 stop30h 30m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$480
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 March 13, 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 March 13, 2026.
This United Airlines deal was found by Cheapflights users on 3/9. 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 stop15h 35m
United Airlines
Fri 10/98:00 am
SOF
- BOS
1 stop12h 50m
United Airlines
Deal found 3/9![United Airlines logo]()
$563
This KLM deal was found by Cheapflights users on 3/8. 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.
Sat 3/286:55 pm
BOS
- SOF
1 stop12h 05m
KLM
Mon 4/67:00 am
SOF
- BOS
1 stop13h 13m
KLM
Deal found 3/8![KLM logo]()
$599
This United Airlines deal was found by Cheapflights users on 3/9. 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 9/98:05 pm
BOS
- SOF
1 stop19h 55m
United Airlines
Fri 10/98:00 am
SOF
- BOS
1 stop12h 50m
United Airlines
Deal found 3/9![United Airlines logo]()
$563
This United Airlines deal was found by Cheapflights users on 3/9. 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 stop19h 55m
United Airlines
Tue 10/612:55 pm
SOF
- BOS
1 stop11h 45m
United Airlines
Deal found 3/9![United Airlines logo]()
$566
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Sun 9/68:05 pm
BOS
- SOF
1 stop19h 55m
United Airlines
Tue 10/66:10 am
SOF
- BOS
1 stop18h 30m
United Airlines
Deal found 3/9![United Airlines logo]()
$566
This United Airlines deal was found by Cheapflights users on 3/9. 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 9/98:05 pm
BOS
- SOF
1 stop15h 35m
United Airlines
Sun 10/412:55 pm
SOF
- BOS
1 stop11h 45m
United Airlines
Deal found 3/9![United Airlines logo]()
$626
This United Airlines deal was found by Cheapflights users on 3/10. 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 4/257:30 pm
BOS
- SOF
2 stops33h 40m
United Airlines
Sat 5/21:55 pm
SOF
- BOS
2 stops41h 04m
United Airlines
Deal found 3/10![United Airlines logo]()
$629
This United Airlines deal was found by Cheapflights users on 3/11. 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 33m
United Airlines
Sun 5/106:10 am
SOF
- BOS
1 stop18h 30m
United Airlines
Deal found 3/11![United Airlines logo]()
$640
This United Airlines deal was found by Cheapflights users on 3/12. 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 5/23:40 pm
BOS
- SOF
2 stops36h 20m
United Airlines
Sat 5/1612:55 pm
SOF
- BOS
1 stop11h 45m
United Airlines
Deal found 3/12![United Airlines logo]()
$652
Last-minute flights from Boston to SofiaDiscover last-minute flight deals from Boston to Sofia. Data last updated March 13, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Sofia. Data last updated March 13, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 3/8. 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 3/225:30 am
BOS
- SOF
2 stops24h 20m
Multiple Airlines
Fri 4/38:00 am
SOF
- BOS
1 stop12h 50m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$464
This Air France deal was found by Cheapflights users on 3/8. 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.
Mon 3/237:30 pm
BOS
- SOF
1 stop12h 35m
Air France
Tue 4/147:00 am
SOF
- BOS
1 stop13h 33m
Air France
Deal found 3/8![Air France logo]()
$487
This CheapOair deal was found by Cheapflights users on 3/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2310:15 am
BOS
- SOF
2 stops21h 00m
Multiple Airlines
Tue 4/146:55 pm
SOF
- BOS
1 stop25h 55m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$488
This SWISS deal was found by Cheapflights users on 3/8. 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.
Mon 4/65:20 pm
BOS
- SOF
1 stop11h 55m
SWISS
Mon 4/203:40 pm
SOF
- BOS
1 stop30h 30m
SWISS
Deal found 3/8![SWISS logo]()
$479
This Travelocity deal was found by Cheapflights users on 3/8. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/65:20 pm
BOS
- SOF
1 stop11h 55m
Multiple Airlines
Mon 4/136:55 pm
SOF
- BOS
2 stops30h 02m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$484
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/98:05 pm
BOS
- SOF
1 stop15h 35m
Lufthansa
Thu 4/2312:55 pm
SOF
- BOS
1 stop11h 45m
Lufthansa
Deal found 3/8![Lufthansa logo]()
$492
This Mytrip deal was found by Cheapflights users on 3/8. 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 4/225:20 pm
BOS
- SOF
1 stop10h 00m
SWISS
Wed 4/2911:05 am
SOF
- BOS
1 stop15h 50m
SWISS
Deal found 3/8![SWISS logo]()
$472
This Mytrip deal was found by Cheapflights users on 3/8. 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 4/228:05 pm
BOS
- SOF
1 stop19h 55m
Multiple Airlines
Wed 4/296:20 am
SOF
- BOS
2 stops15h 32m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$474
This FlightHub deal was found by Cheapflights users on 3/8. 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 4/268:05 pm
BOS
- SOF
1 stop15h 35m
Multiple Airlines
Mon 5/43:40 pm
SOF
- BOS
1 stop30h 30m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$480
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/285:10 pm
BOS
- SOF
1 stop11h 30m
Multiple Airlines
Tue 5/1212:55 pm
SOF
- BOS
1 stop11h 45m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$450
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/288:05 pm
BOS
- SOF
2 stops14h 55m
Lufthansa
Tue 5/1212:55 pm
SOF
- BOS
1 stop11h 45m
Lufthansa
Deal found 3/8![Lufthansa logo]()
$460
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 March 13, 2026.
Search for one-way flight options from Boston to Sofia. Find affordable one-way fares based on user searches. Data last updated March 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/138:50 pm
BOS
- SOF
3 stops35h 55m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Sun 4/2611:00 pm
BOS
- SOF
3 stops57h 45m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 5/2511:00 pm
BOS
- SOF
3 stops33h 45m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/128:50 pm
BOS
- SOF
3 stops43h 50m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 5/2411:00 pm
BOS
- SOF
3 stops57h 45m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 5/178:50 pm
BOS
- SOF
3 stops31h 20m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/148:50 pm
BOS
- SOF
2 stops44h 30m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$302
This SWISS deal was found by Cheapflights users on 3/8. 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.
Tue 5/129:40 pm
BOS
- SOF
1 stop29h 40m
SWISS
Deal found 3/8![SWISS logo]()
$305
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 March 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $450 (Kiwi.com) |
One-way from | $240 (Kiwi.com) |
Popular in | May |
Cheapest in | February |
Average price | $538 |
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 March 13, 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
Mon 9/7
8:05 pm-6:40 pm
1 stop15h 35m
Sofia
Fri 10/9
8:00 am-1:50 pm
1 stop12h 50m
$563
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Wed 9/9
8:05 pm-11:00 pm
1 stop19h 55m
Sofia
Fri 10/9
8:00 am-1:50 pm
1 stop12h 50m
$563
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Mon 9/7
8:05 pm-11:00 pm
1 stop19h 55m
Sofia
Tue 10/6
12:55 pm-5:40 pm
1 stop11h 45m
$566
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sun 9/6
8:05 pm-11:00 pm
1 stop19h 55m
Sofia
Tue 10/6
6:10 am-5:40 pm
1 stop18h 30m
$566
Quickest round-trip
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sat 3/28
6:55 pm-1:00 pm
1 stop12h 05m
Sofia
Mon 4/6
7:00 am-1:13 pm
1 stop13h 13m
$599
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Wed 9/9
8:05 pm-6:40 pm
1 stop15h 35m
Sofia
Sun 10/4
12:55 pm-5:40 pm
1 stop11h 45m
$626
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sat 4/25
7:30 pm-12:10 pm
2 stops33h 40m
Sofia
Sat 5/2
1:55 pm-11:59 pm
2 stops41h 04m
$629
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Thu 4/30
7:27 pm-11:00 pm
2 stops20h 33m
Sofia
Sun 5/10
6:10 am-5:40 pm
1 stop18h 30m
$640
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sat 5/2
3:40 pm-11:00 am
2 stops36h 20m
Sofia
Sat 5/16
12:55 pm-5:40 pm
1 stop11h 45m
$652
Cheapest one-way
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Tue 5/12
9:40 pm-10:20 am
1 stop29h 40m
$305
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 March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 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 March 6, 2026.
The best time to book flights from Boston to Sofia is 60 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 $376). Flying from Boston to Sofia in May is currently the most expensive (average of $552). 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.
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 March 13, 2026.
Peruse reviews from past customers who have flown with KLM,SWISS, andAir France 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.
Crew
8.4
Food
7.3
Comfort
7.6
Entertainment
7.1
Boarding
7.8
Overall
7.8
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Crew
8.4
Food
7.3
Comfort
7.6
Entertainment
7.1
Boarding
7.8
Overall
7.8
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Crew
8.4
Food
7.3
Comfort
7.6
Entertainment
7.1
Boarding
7.8
Overall
7.8
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Crew
8.4
Food
7.3
Comfort
7.6
Entertainment
7.1
Boarding
7.8
Overall
7.8
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Crew
8.4
Food
7.3
Comfort
7.6
Entertainment
7.1
Boarding
7.8
Overall
7.8
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Crew
8.4
Food
7.3
Comfort
7.6
Entertainment
7.1
Boarding
7.8
Overall
7.8
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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Boston and Sofia flights
Browse other Boston and Sofia flight options. Last updated on March 13, 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 March 13, 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 March 13, 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 March 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$380 | Average$480 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$394 | Average$622 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$396 | Average$494 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$410 | Average$672 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$415 | Average$697 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$421 | Average$718 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$478 | Average$540 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$505 | Average$768 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$524 | Average$652 | FlexibilityNo cancel fee | On-time77% |