$328+ Cheap flights from Philadelphia (PHL) to Sofia (SOF)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SOF
Oct 18 — Oct 251
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Sofia with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Philadelphia to Sofia
Cheapest
Best
Last-minute
One-way
Cheapest flights from Philadelphia to SofiaExplore the most affordable flight options available from Philadelphia to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.
Explore the most affordable flight options available from Philadelphia to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.
This British Airways deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:45 pm -
1 stop18h 45m
Wed 12/29:05 pm -
1 stop26h 10m
Deal found 9/17![British Airways logo]()
$555
This British Airways deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:45 pm -
1 stop17h 35m
Wed 12/29:05 pm -
1 stop26h 10m
Deal found 9/14![British Airways logo]()
$556
This FlightHub deal was found by Cheapflights users on 9/17. 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 10/212:45 pm -
2 stops39h 40m
Wed 12/29:05 pm -
1 stop26h 10m
Deal found 9/17![British Airways logo]()
$559
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:55 pm -
2 stops39h 35m
Mon 11/25:15 pm -
1 stop30h 00m
Deal found 9/15![British Airways logo]()
$560
This Expedia deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:11 pm -
2 stops19h 19m
Wed 12/29:05 pm -
2 stops30h 28m
Deal found 9/14![British Airways logo]()
$570
This British Airways deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:45 pm -
1 stop18h 45m
Mon 11/305:15 pm -
1 stop30h 00m
Deal found 9/17![British Airways logo]()
$585
This British Airways deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:45 pm -
1 stop17h 35m
Mon 11/305:15 pm -
1 stop30h 00m
Deal found 9/14![British Airways logo]()
$586
This FlightHub deal was found by Cheapflights users on 9/15. 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 10/279:15 am -
2 stops26h 45m
Tue 11/1712:35 pm -
2 stops41h 21m
Deal found 9/15![Austrian Airlines logo]()
$589
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/276:15 am -
2 stops34h 40m
Tue 11/176:25 am -
1 stop16h 40m
Deal found 9/15![United Airlines logo]()
$598
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/197:00 am -
2 stops22h 10m
Fri 12/46:00 am -
2 stops23h 56m
Deal found 9/17![United Airlines logo]()
$602
This Air Canada deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:00 am -
2 stops22h 10m
Thu 12/36:00 am -
2 stops23h 56m
Deal found 9/14![Air Canada logo]()
$603
This British Airways deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:45 pm -
1 stop18h 45m
Fri 12/48:30 pm -
1 stop26h 45m
Deal found 9/17![British Airways logo]()
$605
Best flights from Philadelphia to SofiaDiscover carefully curated flight deals from Philadelphia to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.
Discover carefully curated flight deals from Philadelphia to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.
This Expedia deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/56:00 pm -
2 stops19h 10m
Mon 1/115:15 pm -
1 stop30h 00m
Deal found 9/14![British Airways logo]()
$548
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1210:40 am -
2 stops18h 30m
Tue 12/16:00 am -
2 stops20h 02m
Deal found 9/14![United Airlines logo]()
$631
This United deal was found by Cheapflights users on 9/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1110:38 am -
2 stops18h 02m
Sun 11/16:25 am -
1 stop16h 40m
Deal found 9/15![Multiple Airlines logo]()
$647
This British Airways deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:45 pm -
1 stop18h 45m
Fri 12/48:30 pm -
1 stop26h 45m
Deal found 9/17![British Airways logo]()
$605
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/2810:40 am -
2 stops18h 30m
Tue 10/208:00 am -
2 stops18h 24m
Deal found 9/16![United Airlines logo]()
$658
This British Airways deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:45 pm -
1 stop11h 40m
Fri 12/48:30 pm -
1 stop26h 45m
Deal found 9/17![British Airways logo]()
$655
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/116:10 am -
2 stops34h 05m
Sun 11/16:25 am -
2 stops38h 52m
Deal found 9/15![United Airlines logo]()
$658
Last-minute flights from Philadelphia to SofiaDiscover last-minute flight deals from Philadelphia to Sofia. Data last updated September 18, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Sofia. Data last updated September 18, 2026 and is based on user searches.
This British Airways deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:45 pm -
1 stop17h 35m
Wed 12/29:05 pm -
1 stop26h 10m
Deal found 9/14![British Airways logo]()
$556
This British Airways deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:45 pm -
1 stop17h 35m
Mon 11/305:15 pm -
1 stop30h 00m
Deal found 9/14![British Airways logo]()
$586
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:55 pm -
2 stops39h 35m
Mon 11/25:15 pm -
1 stop30h 00m
Deal found 9/15![British Airways logo]()
$560
This Expedia deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:11 pm -
2 stops19h 19m
Wed 12/29:05 pm -
2 stops30h 28m
Deal found 9/14![British Airways logo]()
$570
This Air Canada deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:00 am -
2 stops22h 10m
Thu 12/36:00 am -
2 stops23h 56m
Deal found 9/14![Air Canada logo]()
$603
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/197:00 am -
2 stops22h 10m
Fri 12/46:00 am -
2 stops23h 56m
Deal found 9/17![United Airlines logo]()
$602
This British Airways deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:45 pm -
1 stop18h 45m
Wed 12/29:05 pm -
1 stop26h 10m
Deal found 9/17![British Airways logo]()
$555
This British Airways deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:45 pm -
1 stop18h 45m
Mon 11/305:15 pm -
1 stop30h 00m
Deal found 9/17![British Airways logo]()
$585
This British Airways deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:45 pm -
1 stop18h 45m
Fri 12/48:30 pm -
1 stop26h 45m
Deal found 9/17![British Airways logo]()
$605
This FlightHub deal was found by Cheapflights users on 9/17. 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 10/212:45 pm -
2 stops39h 40m
Wed 12/29:05 pm -
1 stop26h 10m
Deal found 9/17![British Airways logo]()
$559
This FlightHub deal was found by Cheapflights users on 9/15. 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 10/279:15 am -
2 stops26h 45m
Tue 11/1712:35 pm -
2 stops41h 21m
Deal found 9/15![Austrian Airlines logo]()
$589
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/276:15 am -
2 stops34h 40m
Tue 11/176:25 am -
1 stop16h 40m
Deal found 9/15![United Airlines logo]()
$598
One-way flights from Philadelphia to SofiaSearch for one-way flight options from Philadelphia to Sofia. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
Search for one-way flight options from Philadelphia to Sofia. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/2012:35 pm -
3 stops45h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$328
This Expedia deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/136:35 pm -
1 stop14h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![British Airways logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/179:09 pm -
3 stops41h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/265:50 am -
3 stops34h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:50 am -
3 stops48h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$343
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/142:45 pm -
3 stops26h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/252:54 pm -
3 stops49h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/138:30 am -
3 stops41h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:20 pm -
3 stops45h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:50 am -
3 stops43h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$358
Find flight deals from Philadelphia to Sofia
Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $544 (Expedia) |
One-way from | $328 (Kiwi.com) |
Popular in | January |
Cheapest in | November |
Average price | $786 |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 18, 2026.
Use the filters below to find and compare flights from Philadelphia to Sofia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Sun 12/13
6:35 pm-4:20 pm
1 stop14h 45m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$329
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Sun 12/13
5:40 pm-10:55 pm
3 stops22h 15m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$402
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Sun 10/25
7:35 pm-4:20 pm
1 stop14h 45m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$457
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Wed 10/21
1:24 pm-11:15 pm
2 stops26h 51m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$471
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Wed 10/21
5:40 pm-1:25 pm
1 stop12h 45m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$478
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Tue 10/13
5:40 pm-6:00 pm
1 stop17h 20m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$478
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Wed 10/14
5:40 pm-1:25 pm
1 stop12h 45m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$478
Quickest round-trip
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Thu 10/15
6:45 pm-1:25 pm
1 stop11h 40m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$507
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Fri 10/16
6:10 am-11:15 pm
2 stops34h 05m
Sofia
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$521
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Tue 1/5
6:00 pm-8:10 pm
2 stops19h 10m
Sofia
Mon 1/11
5:15 pm-4:15 pm
1 stop30h 00m
$548
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from Philadelphia 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 Philadelphia to Sofia in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 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 Philadelphia-Sofia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Sofia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Sofia flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Philadelphia-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 Philadelphia-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 Philadelphia to Sofia
Have a flexible travel schedule? Discover the best time to fly to Sofia from Philadelphia with our price prediction graph.
PHL-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 Philadelphia to Sofia
What is the cheapest month to book a flight from Philadelphia to Sofia?
Currently, November is the cheapest month in which you can book a flight from Philadelphia to Sofia (average of $540). Flying from Philadelphia to Sofia in January is currently the most expensive (average of $7,242). 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 Philadelphia to Sofia?
Airfare is below average for this route at the moment.
Philadelphia to Sofia flights typically cost between $752 and $801 in January.The cheapest round-trip price found within the last 5 days was $544 on British Airways (Jan 5-Jan 11).
Reviews of airlines servicing Sofia
Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated September 18, 2026.
Read reviews from past customers who have flown United Airlines and Lufthansa from Philadelphia to Sofia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Overall
7.4
Entertainment
7.1
Comfort
7.3
Boarding
7.7
Food
6.7
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Crew
8.1
Overall
7.4
Entertainment
7.1
Comfort
7.3
Boarding
7.7
Food
6.7
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Crew
8.1
Overall
7.4
Entertainment
7.1
Comfort
7.3
Boarding
7.7
Food
6.7
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
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Top 2 airlines flying from Philadelphia to Sofia
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$511 | Average$787 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$540 | Average$737 | FlexibilityNo cancel fee | On-time69% |