$327+ Cheap flights from Philadelphia (PHL) 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SOF
Sep 21 — Sep 281
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 August 22, 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 August 22, 2026.
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/93:05 pm -
2 stops25h 10m
Wed 9/166:20 am -
1 stop16h 45m
Deal found 8/18![United Airlines logo]()
$737
This United Airlines deal was found by Cheapflights users on 8/17. 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 8/247:40 pm -
2 stops20h 35m
Wed 10/76:20 am -
2 stops22h 12m
Deal found 8/17![United Airlines logo]()
$740
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/97:40 pm -
2 stops20h 35m
Tue 9/156:10 am -
2 stops15h 37m
Deal found 8/18![United Airlines logo]()
$741
This Justfly.com deal was found by Cheapflights users on 8/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:40 pm -
1 stop17h 20m
Wed 10/76:20 am -
1 stop16h 45m
Deal found 8/17![Lufthansa logo]()
$743
This United Airlines deal was found by Cheapflights users on 8/17. 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 8/245:40 pm -
1 stop12h 45m
Thu 10/86:30 am -
1 stop16h 35m
Deal found 8/17![United Airlines logo]()
$744
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/145:40 pm -
1 stop22h 00m
Wed 10/146:20 am -
1 stop16h 45m
Deal found 8/18![United Airlines logo]()
$745
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/67:40 pm -
2 stops20h 35m
Wed 9/166:20 am -
2 stops19h 34m
Deal found 8/18![United Airlines logo]()
$747
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/145:40 pm -
1 stop17h 20m
Fri 10/166:20 am -
2 stops22h 12m
Deal found 8/18![United Airlines logo]()
$748
This FlightHub deal was found by Cheapflights users on 8/19. 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 9/135:40 pm -
1 stop17h 30m
Fri 10/236:20 am -
2 stops40h 21m
Deal found 8/19![Multiple Airlines logo]()
$753
This KAYAK deal was found by Cheapflights users on 8/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:34 am -
2 stops18h 41m
Mon 10/53:40 pm -
2 stops33h 14m
Deal found 8/17![SWISS logo]()
$755
This United Airlines deal was found by Cheapflights users on 8/17. 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 8/247:40 pm -
2 stops20h 35m
Mon 10/52:20 pm -
1 stop32h 45m
Deal found 8/17![United Airlines logo]()
$757
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/83:05 pm -
2 stops14h 05m
Mon 10/122:20 pm -
1 stop32h 45m
Deal found 8/18![United Airlines logo]()
$758
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 August 22, 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 August 22, 2026.
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/67:40 pm -
2 stops20h 35m
Wed 9/166:20 am -
1 stop16h 45m
Deal found 8/18![United Airlines logo]()
$737
This United deal was found by Cheapflights users on 8/19. 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 9/135:40 pm -
1 stop17h 30m
Fri 10/236:20 am -
1 stop16h 45m
Deal found 8/19![Multiple Airlines logo]()
$745
This FlightHub deal was found by Cheapflights users on 8/17. 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.
Mon 9/285:40 pm -
1 stop17h 20m
Tue 10/206:10 am -
1 stop16h 55m
Deal found 8/17![Lufthansa logo]()
$774
This United Airlines deal was found by Cheapflights users on 8/19. 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 9/87:40 pm -
2 stops16h 00m
Wed 10/216:20 am -
1 stop16h 45m
Deal found 8/19![United Airlines logo]()
$737
This United Airlines deal was found by Cheapflights users on 8/19. 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 9/137:40 pm -
2 stops20h 35m
Thu 10/226:30 am -
2 stops15h 17m
Deal found 8/19![United Airlines logo]()
$741
This United Airlines deal was found by Cheapflights users on 8/20. 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 9/135:40 pm -
1 stop17h 30m
Fri 10/236:20 am -
2 stops22h 12m
Deal found 8/20![United Airlines logo]()
$748
This United Airlines deal was found by Cheapflights users on 8/21. 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 9/289:34 am -
2 stops19h 36m
Tue 10/206:10 am -
1 stop16h 55m
Deal found 8/21![United Airlines logo]()
$768
Last-minute flights from Philadelphia to SofiaDiscover last-minute flight deals from Philadelphia to Sofia. Data last updated August 22, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Sofia. Data last updated August 22, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/17. 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 8/247:40 pm -
2 stops20h 35m
Tue 10/66:10 am -
2 stops15h 37m
Deal found 8/17![United Airlines logo]()
$740
This KAYAK deal was found by Cheapflights users on 8/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:34 am -
2 stops18h 41m
Mon 10/53:40 pm -
2 stops33h 14m
Deal found 8/17![SWISS logo]()
$755
This United Airlines deal was found by Cheapflights users on 8/17. 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 8/247:40 pm -
2 stops20h 35m
Mon 10/52:20 pm -
1 stop32h 45m
Deal found 8/17![United Airlines logo]()
$757
This Justfly.com deal was found by Cheapflights users on 8/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:40 pm -
1 stop17h 20m
Wed 10/76:20 am -
1 stop16h 45m
Deal found 8/17![Lufthansa logo]()
$743
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/67:40 pm -
2 stops20h 35m
Wed 9/166:20 am -
2 stops19h 34m
Deal found 8/18![United Airlines logo]()
$747
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/83:05 pm -
2 stops14h 05m
Mon 10/122:20 pm -
1 stop32h 45m
Deal found 8/18![United Airlines logo]()
$758
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/93:05 pm -
2 stops25h 10m
Wed 9/166:20 am -
1 stop16h 45m
Deal found 8/18![United Airlines logo]()
$737
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/97:40 pm -
2 stops20h 35m
Tue 9/156:10 am -
2 stops15h 37m
Deal found 8/18![United Airlines logo]()
$741
This FlightHub deal was found by Cheapflights users on 8/19. 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 9/135:40 pm -
1 stop17h 30m
Fri 10/236:20 am -
2 stops40h 21m
Deal found 8/19![Multiple Airlines logo]()
$753
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/145:40 pm -
1 stop22h 00m
Wed 10/146:20 am -
1 stop16h 45m
Deal found 8/18![United Airlines logo]()
$745
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/145:40 pm -
1 stop17h 20m
Tue 9/226:10 am -
2 stops22h 22m
Deal found 8/18![United Airlines logo]()
$748
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 August 22, 2026.
Search for one-way flight options from Philadelphia to Sofia. Find affordable one-way fares based on user searches. Data last updated August 22, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 10/115:45 pm -
2 stops46h 55m
Deal found 8/18![Multiple Airlines logo]()
$327
This Cheapflightsfares deal was found by Cheapflights users on 8/18. 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.
Sun 10/116:45 pm -
1 stop17h 35m
Deal found 8/18![British Airways logo]()
$447
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 9/158:41 am -
2 stops23h 19m
Deal found 8/18![Multiple Airlines logo]()
$458
This Booking.com deal was found by Cheapflights users on 8/18. 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.
Tue 9/155:40 pm -
1 stop12h 25m
Deal found 8/18![Lufthansa logo]()
$470
This Trip.com deal was found by Cheapflights users on 8/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1511:04 am -
3 stops18h 06m
Deal found 8/18![SWISS logo]()
$526
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 August 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $737 (United Airlines) |
One-way from | $327 (Kiwi.com) |
Popular in | January |
Cheapest in | November |
Average price | $804 |
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 August 22, 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 9/6
7:40 pm-11:15 pm
2 stops20h 35m
Sofia
Wed 9/16
6:20 am-4:05 pm
1 stop16h 45m
$737
Quickest round-trip
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Tue 9/8
7:40 pm-6:40 pm
2 stops16h 00m
Sofia
Wed 10/21
6:20 am-4:05 pm
1 stop16h 45m
$737
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Sun 9/13
7:40 pm-11:15 pm
2 stops20h 35m
Sofia
Thu 10/22
6:30 am-2:47 pm
2 stops15h 17m
$741
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Sun 9/13
5:40 pm-6:10 pm
1 stop17h 30m
Sofia
Fri 10/23
6:20 am-4:05 pm
1 stop16h 45m
$745
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Sun 9/13
5:40 pm-6:10 pm
1 stop17h 30m
Sofia
Fri 10/23
6:20 am-9:32 pm
2 stops22h 12m
$748
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Mon 9/28
9:34 am-12:10 pm
2 stops19h 36m
Sofia
Tue 10/20
6:10 am-4:05 pm
1 stop16h 55m
$768
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Mon 9/28
5:40 pm-6:00 pm
1 stop17h 20m
Sofia
Tue 10/20
6:10 am-4:05 pm
1 stop16h 55m
$774
Cheapest one-way
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Sun 10/11
5:45 pm-11:40 pm
2 stops46h 55m
$327
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Tue 9/15
8:41 am-3:00 pm
2 stops23h 19m
$458
Quickest one-way
PhiladelphiaSofia
PHL Philadelphia - SOF Sofia
PHLSOF
Philadelphia
Tue 9/15
5:40 pm-1:05 pm
1 stop12h 25m
$470
Sorted 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 August.
| 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 typical for this route at the moment.
Philadelphia to Sofia flights typically cost between $602 and $846 in September.The cheapest round-trip price found within the last 5 days was $737 on United Airlines (Sep 9-Sep 15).
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 August 22, 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.
Entertainment
7.1
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Entertainment
7.1
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Entertainment
7.1
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Philadelphia
Popular flights
Sofia flight routes
Alternative routes for Philadelphia to Sofia
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Sofia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Philadelphia to Sofia by cabin class
Find flights from Philadelphia to Sofia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Sofia flights
Browse other Philadelphia and Sofia flight options. Last updated on August 22, 2026.
Other flights from Philadelphia
Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on August 22, 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 August 22, 2026.
Top 2 airlines flying from Philadelphia to Sofia
Discover the top 2 airlines that operate flights from Philadelphia 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 7,457,451 searches. Data last updated August 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$497 | Average$790 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$540 | Average$597 | FlexibilityNo cancel fee | On-time69% |