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$286+ 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SOF
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This FlightHub deal was found by Cheapflights users on 1/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/315:40 pm
PHL
-
SOF
1 stop12h 25m
Lufthansa
Tue 4/76:10 am
SOF
-
PHL
1 stop16h 55m
Lufthansa
Deal found 1/27$485
This FlightHub deal was found by Cheapflights users on 1/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/313:30 pm
PHL
-
SOF
2 stops20h 10m
Multiple Airlines
Tue 4/76:10 am
SOF
-
PHL
1 stop16h 55m
Multiple Airlines
Deal found 1/27$487
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Tue 3/179:55 am
PHL
-
SOF
2 stops26h 25m
United Airlines
Tue 3/246:00 am
SOF
-
PHL
1 stop17h 05m
United Airlines
Deal found 1/27$488
This Air Canada deal was found by Cheapflights users on 1/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/313:30 pm
PHL
-
SOF
2 stops20h 10m
Air Canada
Wed 4/86:20 am
SOF
-
PHL
2 stops15h 26m
Air Canada
Deal found 1/27$490
This Booking.com deal was found by Cheapflights users on 1/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/176:40 pm
PHL
-
SOF
1 stop13h 05m
Lufthansa
Tue 3/316:10 am
SOF
-
PHL
1 stop16h 55m
Lufthansa
Deal found 1/27$491
This Air Canada deal was found by Cheapflights users on 1/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/313:30 pm
PHL
-
SOF
2 stops20h 10m
Air Canada
Tue 4/712:55 pm
SOF
-
PHL
2 stops32h 51m
Air Canada
Deal found 1/27$492
This FlightHub deal was found by Cheapflights users on 1/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/176:40 pm
PHL
-
SOF
1 stop13h 05m
Lufthansa
Tue 3/246:00 am
SOF
-
PHL
1 stop17h 05m
Lufthansa
Deal found 1/27$494
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/295:35 pm
PHL
-
SOF
1 stop13h 00m
United Airlines
Tue 4/76:10 am
SOF
-
PHL
1 stop16h 50m
United Airlines
Deal found 1/27$496
This KLM deal was found by Cheapflights users on 1/27. 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 3/1712:26 pm
PHL
-
SOF
2 stops19h 29m
Multiple Airlines
Tue 3/317:00 am
SOF
-
PHL
2 stops21h 23m
Multiple Airlines
Deal found 1/27$497
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/295:35 pm
PHL
-
SOF
1 stop13h 00m
United Airlines
Wed 4/86:20 am
SOF
-
PHL
2 stops15h 26m
United Airlines
Deal found 1/27$499
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/295:35 pm
PHL
-
SOF
1 stop17h 35m
United Airlines
Fri 4/106:20 am
SOF
-
PHL
2 stops38h 56m
United Airlines
Deal found 1/27$506
This FlightHub deal was found by Cheapflights users on 1/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:40 pm
PHL
-
VAR
1 stop18h 05m
Lufthansa
Wed 10/144:00 pm
VAR
-
PHL
2 stops31h 05m
Lufthansa
Deal found 1/27$577

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$485
(FlightHub)

One-way from

$286
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$702
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. 2% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 29, 2026.
Use the filters below to find and compare flights from Philadelphia to Bulgaria that are best for you.

Fly from

Philadelphia

Fly to

Bulgaria

Route

Depart

Return

Price

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 3/31

5:40 pm-1:05 pm

1 stop12h 25m

Sofia

Tue 4/7

6:10 am-4:05 pm

1 stop16h 55m

$485

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 3/31

3:30 pm-6:40 pm

2 stops20h 10m

Sofia

Tue 4/7

6:10 am-4:05 pm

1 stop16h 55m

$487

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 3/29

1:27 pm-11:10 pm

2 stops26h 43m

Sofia

Tue 4/7

6:10 am-4:00 pm

1 stop16h 50m

$488

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 3/30

6:47 pm-11:10 pm

2 stops21h 23m

Sofia

Thu 4/9

6:30 am-12:19 pm

2 stops36h 49m

$498

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 3/30

7:45 pm-11:10 pm

2 stops20h 25m

Sofia

Fri 4/10

6:20 am-2:16 pm

2 stops38h 56m

$498

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 3/29

5:35 pm-1:35 pm

1 stop13h 00m

Sofia

Wed 4/8

6:20 am-2:46 pm

2 stops15h 26m

$499

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 4/1

10:33 am-12:10 pm

2 stops18h 37m

Sofia

Mon 4/6

2:20 pm-4:00 pm

1 stop32h 40m

$509

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Fri 3/20

7:45 pm-10:45 pm

2 stops21h 00m

Sofia

Tue 3/24

6:00 am-5:05 pm

1 stop17h 05m

$538

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 5/12

5:00 pm-11:10 pm

2 stops23h 10m

Sofia

Mon 5/25

2:20 pm-4:00 pm

1 stop32h 40m

$539

PhiladelphiaVarna

PHL - VAR

PHLVAR

Philadelphia

Sat 3/14

7:50 am-3:15 pm

2 stops25h 25m

Varna

Sat 3/21

4:00 pm-5:05 pm

2 stops31h 05m

$880

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 23 results
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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, October is the cheapest month in which you can book a flight from Philadelphia to Bulgaria (average of $243). Flying from Philadelphia to Bulgaria in May is currently the most expensive (average of $574). 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 January 29, 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
9,215 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,215 reviews
United Airlines
7.4
Good
9,215 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Lufthansa
6.8
Okay
7,754 reviews
United Airlines
7.4
Good
9,215 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 12h 25m. Fly via Lufthansa or United Airlines 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, October is the cheapest month in which you can book a flight from Philadelphia to Bulgaria (average of $243). Flying from Philadelphia to Bulgaria in May is currently the most expensive (average of $574). 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

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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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$511Average$845FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$540Average$791FlexibilityNo cancel feeOn-time69%

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