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$338+ Cheap flights from Philadelphia (PHL) to Bulgaria

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SOF
Jun 1 — Jun 81
Mon 6/1
Mon 6/8
1 adult, Economy
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Cheap flight deals from Philadelphia to Bulgaria

Cheapest flights from Philadelphia to Bulgaria
Explore the most affordable flight options available from Philadelphia to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 2, 2026.

This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/133:25 pm
PHL
-
SOF
2 stops24h 50m
Multiple Airlines
Thu 5/286:30 am
SOF
-
PHL
1 stop16h 35m
Multiple Airlines
Deal found 4/28$737
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:28 am
PHL
-
SOF
2 stops18h 42m
United Airlines
Wed 9/166:20 am
SOF
-
PHL
1 stop16h 45m
United Airlines
Deal found 4/28$738
This FlightHub deal was found by Cheapflights users on 4/30. 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 9/95:40 pm
PHL
-
SOF
1 stop17h 25m
Lufthansa
Wed 9/166:20 am
SOF
-
PHL
1 stop16h 45m
Lufthansa
Deal found 4/30$744
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/137:45 pm
PHL
-
SOF
2 stops20h 30m
United Airlines
Tue 6/162:10 pm
SOF
-
PHL
2 stops26h 38m
United Airlines
Deal found 4/30$747
This Priceline deal was found by Cheapflights users on 5/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/83:30 pm
PHL
-
SOF
2 stops19h 50m
Multiple Airlines
Sun 11/152:30 pm
SOF
-
PHL
1 stop30h 20m
Multiple Airlines
Deal found 5/1$753
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.
Tue 5/1210:25 am
PHL
-
SOF
2 stops17h 35m
Air Canada
Thu 5/286:10 am
SOF
-
PHL
2 stops23h 33m
Air Canada
Deal found 4/28$763
This FlightHub deal was found by Cheapflights users on 4/30. 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 5/135:40 pm
PHL
-
SOF
2 stops22h 35m
Lufthansa
Tue 6/166:40 pm
SOF
-
PHL
1 stop28h 25m
Lufthansa
Deal found 4/30$783
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:40 pm
PHL
-
SOF
1 stop17h 20m
Lufthansa
Wed 5/276:20 am
SOF
-
PHL
1 stop16h 45m
Lufthansa
Deal found 4/28$795
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/43:10 pm
PHL
-
SOF
2 stops14h 00m
United Airlines
Thu 8/206:30 am
SOF
-
PHL
1 stop16h 35m
United Airlines
Deal found 4/28$797
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 8/58:25 pm
PHL
-
BOJ
1 stop19h 10m
Multiple Airlines
Wed 9/211:20 pm
BOJ
-
PHL
2 stops26h 35m
Multiple Airlines
Deal found 5/2$1,185

Find flight deals from Philadelphia to Bulgaria

Keep the following information in mind while searching for Philadelphia to Bulgaria flight deals. Data was last updated May 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$737
(Justfly.com)

One-way from

$338
(Mytrip)

Popular in

January

Cheapest in

November

Average price

$1,201
Provider with most accurate pricing for Philadelphia-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Sofia flights.
Search Deals
From Philadelphia to Bulgaria
Search Deals
One-way flight from Philadelphia to Bulgaria
Search Deals
Highest demand for flights based on searches. 56% potential increase in price ($1,726 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 67% potential price decrease ($537 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Bulgaria 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 May 2, 2026.
Use the filters below to find and compare flights from Philadelphia to Bulgaria that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

10:28 am-12:10 pm

2 stops18h 42m

Sofia

Wed 9/16

6:20 am-4:05 pm

1 stop16h 45m

$738

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

5:40 pm-6:05 pm

1 stop17h 25m

Sofia

Wed 9/16

6:20 am-4:05 pm

1 stop16h 45m

$744

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

3:10 pm-12:10 pm

2 stops14h 00m

Sofia

Thu 8/20

6:10 am-12:50 am

2 stops25h 40m

$809

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Fri 8/7

5:40 pm-10:30 pm

1 stop21h 50m

Sofia

Sat 8/22

6:20 am-9:46 am

2 stops34h 26m

$966

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sat 8/1

5:00 pm-11:15 pm

2 stops47h 15m

Sofia

Sun 8/23

8:00 am-12:50 am

2 stops23h 50m

$1,018

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Thu 5/14

7:45 pm-11:15 pm

2 stops20h 30m

Sofia

Tue 6/23

6:10 am-4:05 pm

1 stop16h 55m

$1,041
Quickest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 6/9

3:10 pm-12:10 pm

2 stops14h 00m

Sofia

Tue 6/23

6:10 am-4:05 pm

1 stop16h 55m

$1,047

PhiladelphiaBurgas

PHL - BOJ

PHLBOJ

Philadelphia

Wed 8/5

8:25 pm-10:35 pm

1 stop19h 10m

Bourgas

Wed 9/2

11:20 pm-6:55 pm

2 stops26h 35m

$1,185
Cheapest one-way

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

5:40 pm-6:00 pm

1 stop17h 20m

$362

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 8/5

6:10 am-11:15 pm

2 stops34h 05m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 27 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Philadelphia to Bulgaria

Have a flexible travel schedule? Discover the best time to fly to Bulgaria from Philadelphia with our price prediction graph.
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 Bulgaria

What is the cheapest month to book a flight from Philadelphia to Bulgaria?

Currently, April is the cheapest month in which you can book a flight from Philadelphia to Bulgaria (average of $375). Flying from Philadelphia to Bulgaria 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.

Reviews of airlines servicing Bulgaria

Get insights into the airlines that provide service to Bulgaria. 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 Bulgaria. Reviews last updated May 2, 2026.
Peruse reviews from past customers who have flown with United Airlines and Lufthansa from Philadelphia to Bulgaria 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.
United Airlines
7.4
Good
9,679 reviews

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,679 reviews
United Airlines
7.4
Good
9,679 reviews

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Lufthansa
6.8
Okay
7,964 reviews
United Airlines
7.4
Good
9,679 reviews

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Bulgaria. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Philadelphia to Bulgaria?

    Philadelphia (PHL), located 7.0 mi from the city center, is the airport you fly out of when you book flights from Philadelphia to Bulgaria.

  • How long is the flight from Philadelphia to Bulgaria?

    There are many flights that can get you from Philadelphia to Bulgaria in 17h 25m. Fly via United Airlines or Lufthansa to get the fastest option. Philadelphia and Bulgaria are separated by a distance of 4800 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Philadelphia to Bulgaria?

    Most travelers choose Philadelphia - Sofia, Philadelphia - Bourgas or Philadelphia - Varna when deciding on the best route from Philadelphia to Bulgaria.

  • Can I find deals for flights from Philadelphia to Bulgaria that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Bulgaria flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Bulgaria?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Bulgaria.

  • Can I find deals for business class flights from Philadelphia to Bulgaria?

    Yes. Cheapflights offers flight deals from Philadelphia to Bulgaria by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Bulgaria?

    Currently, April is the cheapest month in which you can book a flight from Philadelphia to Bulgaria (average of $375). Flying from Philadelphia to Bulgaria 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.

See more FAQs

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Alternative routes for Philadelphia to Bulgaria

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Philadelphia to Bulgaria

Discover the top 2 airlines that operate flights from Philadelphia to Bulgaria. 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 May 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$497Average$1,084FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$540Average$656FlexibilityNo cancel feeOn-time69%

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