$293+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOF
May 30 — Jun 61
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 30, 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 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Thu 9/2411:00 pm
BOS
- SOF
2 stops19h 15m
Multiple Airlines
Thu 10/810:10 am
SOF
- BOS
1 stop18h 05m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$586
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
Wed 9/2311:00 pm
BOS
- SOF
1 stop30h 15m
Multiple Airlines
Wed 10/79:40 pm
SOF
- BOS
1 stop30h 35m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$588
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Tue 10/2710:50 pm
BOS
- SOF
2 stops13h 30m
Multiple Airlines
Tue 11/107:55 am
SOF
- BOS
1 stop12h 35m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$598
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Wed 5/65:20 pm
BOS
- SOF
1 stop10h 00m
SWISS
Wed 5/1311:05 am
SOF
- BOS
1 stop15h 50m
SWISS
Deal found 4/29![SWISS logo]()
$599
This CrystalTravel deal was found by Cheapflights users on 4/27. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:50 pm
BOS
- SOF
1 stop10h 25m
Multiple Airlines
Wed 11/116:00 am
SOF
- BOS
1 stop19h 35m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$602
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 9/911:00 pm
BOS
- SOF
1 stop30h 15m
Multiple Airlines
Wed 9/239:40 pm
SOF
- BOS
1 stop30h 35m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$607
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 9/2011:50 pm
BOS
- SOF
1 stop18h 45m
Multiple Airlines
Wed 10/76:00 am
SOF
- BOS
2 stops22h 15m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$608
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Tue 8/255:10 pm
BOS
- SOF
1 stop11h 30m
Austrian Airlines
Tue 9/86:55 pm
SOF
- BOS
1 stop25h 55m
Austrian Airlines
Deal found 4/26![Austrian Airlines logo]()
$609
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/49:40 pm
BOS
- SOF
1 stop29h 40m
SWISS
Wed 5/2011:05 am
SOF
- BOS
1 stop15h 50m
SWISS
Deal found 4/27![SWISS logo]()
$611
This FlightHub deal was found by Cheapflights users on 4/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/269:40 pm
BOS
- SOF
1 stop14h 40m
Multiple Airlines
Mon 11/912:35 pm
SOF
- BOS
1 stop31h 55m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$612
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
Mon 8/245:20 pm
BOS
- SOF
1 stop11h 55m
Multiple Airlines
Mon 9/712:25 pm
SOF
- BOS
1 stop32h 25m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$613
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 30, 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 30, 2026.
This KLM deal was found by Cheapflights users on 4/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:00 pm
BOS
- SOF
1 stop12h 00m
KLM
Wed 8/267:00 am
SOF
- BOS
1 stop18h 30m
KLM
Deal found 4/28![KLM logo]()
$660
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:00 am
BOS
- SOF
2 stops22h 10m
United Airlines
Tue 5/266:10 am
SOF
- BOS
2 stops20h 18m
United Airlines
Deal found 4/29![United Airlines logo]()
$660
This United Airlines deal was found by Cheapflights users on 4/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/198:05 pm
BOS
- SOF
1 stop20h 10m
United Airlines
Thu 9/38:00 am
SOF
- BOS
2 stops33h 17m
United Airlines
Deal found 4/26![United Airlines logo]()
$684
This KLM deal was found by Cheapflights users on 4/25. 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 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 4/25![KLM logo]()
$743
This United Airlines deal was found by Cheapflights users on 4/27. 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.
Sun 7/196:00 am
BOS
- SOF
2 stops34h 15m
United Airlines
Wed 9/98:00 am
SOF
- BOS
1 stop12h 50m
United Airlines
Deal found 4/27![United Airlines logo]()
$684
This KLM deal was found by Cheapflights users on 4/27. 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 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 stop13h 18m
KLM
Deal found 4/27![KLM logo]()
$748
This United Airlines deal was found by Cheapflights users on 4/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/99:45 am
BOS
- SOF
2 stops19h 25m
United Airlines
Mon 11/21:55 pm
SOF
- BOS
2 stops35h 47m
United Airlines
Deal found 4/26![United Airlines logo]()
$690
This KLM deal was found by Cheapflights users on 4/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/186:50 pm
BOS
- SOF
1 stop12h 10m
KLM
Mon 5/257:00 am
SOF
- BOS
1 stop16h 25m
KLM
Deal found 4/27![KLM logo]()
$749
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1010:45 am
BOS
- SOF
2 stops17h 15m
United Airlines
Tue 5/266:10 am
SOF
- BOS
2 stops17h 28m
United Airlines
Deal found 4/29![United Airlines logo]()
$696
This United Airlines deal was found by Cheapflights users on 4/25. 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 9/152:19 pm
BOS
- SOF
2 stops14h 51m
United Airlines
Wed 9/301:50 pm
SOF
- BOS
2 stops17h 04m
United Airlines
Deal found 4/25![United Airlines logo]()
$699
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Sat 9/268:15 pm
BOS
- SOF
2 stops32h 25m
United Airlines
Sat 10/108:00 am
SOF
- BOS
2 stops22h 13m
United Airlines
Deal found 4/25![United Airlines logo]()
$753
Last-minute flights from Boston to SofiaDiscover last-minute flight deals from Boston to Sofia. Data last updated April 30, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Sofia. Data last updated April 30, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/49:40 pm
BOS
- SOF
1 stop29h 40m
SWISS
Wed 5/2011:05 am
SOF
- BOS
1 stop15h 50m
SWISS
Deal found 4/27![SWISS logo]()
$611
This Kiwi.com deal was found by Cheapflights users on 4/27. 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 5/48:05 pm
BOS
- SOF
2 stops14h 55m
Multiple Airlines
Wed 5/208:00 am
SOF
- BOS
1 stop12h 50m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$623
This Cheapflightsfares deal was found by Cheapflights users on 4/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/411:27 am
BOS
- SOF
2 stops17h 13m
Austrian Airlines
Wed 5/208:00 am
SOF
- BOS
2 stops17h 11m
Austrian Airlines
Deal found 4/27![Austrian Airlines logo]()
$645
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Wed 5/65:20 pm
BOS
- SOF
1 stop10h 00m
SWISS
Wed 5/1311:05 am
SOF
- BOS
1 stop15h 50m
SWISS
Deal found 4/29![SWISS logo]()
$599
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/62:22 pm
BOS
- SOF
2 stops20h 48m
Austrian Airlines
Wed 5/138:00 am
SOF
- BOS
2 stops17h 11m
Austrian Airlines
Deal found 4/29![Austrian Airlines logo]()
$617
This KLM deal was found by Cheapflights users on 4/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/104:35 pm
BOS
- SOF
1 stop14h 25m
KLM
Tue 5/267:00 am
SOF
- BOS
1 stop13h 10m
KLM
Deal found 4/29![KLM logo]()
$659
This lol.travel deal was found by Cheapflights users on 4/29. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/119:40 pm
BOS
- SOF
1 stop29h 40m
Multiple Airlines
Tue 5/2612:25 pm
SOF
- BOS
1 stop32h 25m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$614
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Mon 5/118:05 pm
BOS
- SOF
2 stops14h 55m
Lufthansa
Tue 5/266:10 am
SOF
- BOS
1 stop16h 30m
Lufthansa
Deal found 4/29![Lufthansa logo]()
$632
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:00 am
BOS
- SOF
2 stops22h 10m
United Airlines
Tue 5/266:10 am
SOF
- BOS
1 stop18h 30m
United Airlines
Deal found 4/29![United Airlines logo]()
$646
This Gotogate deal was found by Cheapflights users on 4/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:10 am
BOS
- SOF
2 stops24h 00m
Multiple Airlines
Tue 6/21:05 pm
SOF
- BOS
1 stop13h 50m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$658
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 30, 2026.
Search for one-way flight options from Boston to Sofia. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Tue 9/111:00 pm
BOS
- SOF
2 stops41h 00m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Mon 5/188:50 pm
BOS
- SOF
3 stops31h 20m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$300
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Wed 8/55:20 pm
BOS
- SOF
1 stop10h 00m
SWISS
Deal found 4/29![SWISS logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Tue 7/288:50 pm
BOS
- SOF
3 stops39h 05m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$312
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Tue 9/15:10 pm
BOS
- SOF
1 stop15h 10m
Austrian Airlines
Deal found 4/29![Austrian Airlines logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Mon 7/278:50 pm
BOS
- SOF
3 stops36h 40m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Tue 7/285:10 pm
BOS
- SOF
1 stop11h 30m
Austrian Airlines
Deal found 4/29![Austrian Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Sun 8/29:40 pm
BOS
- SOF
2 stops35h 00m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$329
This Booking.com deal was found by Cheapflights users on 4/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:20 pm
BOS
- SOF
2 stops11h 50m
SWISS
Deal found 4/28![SWISS logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Mon 8/35:20 pm
BOS
- SOF
2 stops37h 30m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$338
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 30, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $586 (Kiwi.com) |
One-way from | $293 (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 30, 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 7/5
7:00 pm-2:00 pm
1 stop12h 00m
Sofia
Wed 8/26
7:00 am-6:30 pm
1 stop18h 30m
$660
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Mon 5/11
7:00 am-12:10 pm
2 stops22h 10m
Sofia
Tue 5/26
6:10 am-7:28 pm
2 stops20h 18m
$660
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sun 7/19
8:05 pm-11:15 pm
1 stop20h 10m
Sofia
Thu 9/3
8:00 am-10:17 am
2 stops33h 17m
$684
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sun 7/19
6:00 am-11:15 pm
2 stops34h 15m
Sofia
Wed 9/9
8:00 am-1:50 pm
1 stop12h 50m
$684
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Fri 10/9
9:45 am-12:10 pm
2 stops19h 25m
Sofia
Mon 11/2
1:55 pm-6:42 pm
2 stops35h 47m
$690
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Sun 5/10
10:45 am-11:00 am
2 stops17h 15m
Sofia
Tue 5/26
6:10 am-4:38 pm
2 stops17h 28m
$696
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Tue 9/15
2:19 pm-12:10 pm
2 stops14h 51m
Sofia
Wed 9/30
1:50 pm-11:54 pm
2 stops17h 04m
$699
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-1:18 pm
1 stop13h 18m
$748
Quickest round-trip
BostonSofia
BOS - SOF
BOSSOF
Boston Logan Intl
Mon 5/18
6:50 pm-2:00 pm
1 stop12h 10m
Sofia
Mon 5/25
7:00 am-4:25 pm
1 stop16h 25m
$749
Showing 1-10 of 22 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 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 Accuracy1 star | Trust Score*3 stars |
- 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 69 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 $924). 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 30, 2026.
Peruse reviews from past customers who have flown with KLM,Air France, 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.
Boarding
7.8
Food
7.3
Crew
8.4
Overall
7.8
Entertainment
7.1
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Crew
8.4
Overall
7.8
Entertainment
7.1
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Crew
8.4
Overall
7.8
Entertainment
7.1
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Crew
8.4
Overall
7.8
Entertainment
7.1
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Crew
8.4
Overall
7.8
Entertainment
7.1
Comfort
7.7
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Boarding
7.8
Food
7.3
Crew
8.4
Overall
7.8
Entertainment
7.1
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 April 30, 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 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 30, 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 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$380 | Average$496 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$394 | Average$622 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$396 | Average$495 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$410 | Average$554 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$415 | Average$697 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$416 | Average$682 | 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$689 | FlexibilityNo cancel fee | On-time77% |