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$440+ 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 7/29. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SOF
Apr 17 — Apr 241
Fri 4/17
Fri 4/24
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 March 18, 2026.

This United Airlines deal was found by Cheapflights users on 3/14. 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.
Tue 3/317:45 pm
PHL
-
SOF
2 stops15h 55m
United Airlines
Tue 4/72:10 pm
SOF
-
PHL
2 stops31h 00m
United Airlines
Deal found 3/14$616
This United Airlines deal was found by Cheapflights users on 3/14. 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 5/46:00 am
PHL
-
SOF
2 stops23h 10m
United Airlines
Tue 5/122:10 pm
SOF
-
PHL
2 stops26h 38m
United Airlines
Deal found 3/14$618
This FlightHub deal was found by Cheapflights users on 3/13. 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
2 stops16h 55m
Lufthansa
Deal found 3/13$630
This United Airlines deal was found by Cheapflights users on 3/13. 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 9/1612:55 pm
SOF
-
PHL
2 stops27h 48m
United Airlines
Deal found 3/13$649
This Air Canada deal was found by Cheapflights users on 3/14. 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.
Mon 5/410:05 am
PHL
-
SOF
2 stops17h 50m
Multiple Airlines
Tue 5/266:10 am
SOF
-
PHL
2 stops22h 23m
Multiple Airlines
Deal found 3/14$651
This Air Canada deal was found by Cheapflights users on 3/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/183:30 pm
PHL
-
SOF
2 stops19h 50m
Air Canada
Sun 11/226:10 am
SOF
-
PHL
2 stops15h 37m
Air Canada
Deal found 3/15$658
This Air Canada deal was found by Cheapflights users on 3/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/410:05 am
PHL
-
SOF
2 stops17h 55m
Multiple Airlines
Thu 8/206:30 am
SOF
-
PHL
2 stops15h 19m
Multiple Airlines
Deal found 3/17$670
This oojo deal was found by Cheapflights users on 3/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/108:25 am
PHL
-
VAR
2 stops35h 30m
Turkish Airlines
Wed 8/199:35 am
VAR
-
PHL
2 stops29h 44m
Turkish Airlines
Deal found 3/13$934
This oojo deal was found by Cheapflights users on 3/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/138:25 am
PHL
-
VAR
2 stops41h 20m
Turkish Airlines
Wed 8/1910:10 pm
VAR
-
PHL
2 stops41h 09m
Turkish Airlines
Deal found 3/13$1,019
This Expedia deal was found by Cheapflights users on 3/15. 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.
Fri 9/45:40 pm
PHL
-
BOJ
1 stop31h 45m
Multiple Airlines
Wed 9/912:35 pm
BOJ
-
PHL
2 stops33h 12m
Multiple Airlines
Deal found 3/15$1,143
This FlightHub deal was found by Cheapflights users on 3/15. 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.
Fri 9/45:40 pm
PHL
-
BOJ
2 stops32h 25m
Lufthansa
Wed 9/912:35 pm
BOJ
-
PHL
2 stops34h 30m
Lufthansa
Deal found 3/15$1,254
This KAYAK deal was found by Cheapflights users on 3/13. 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.
Sun 5/105:40 pm
PHL
-
VAR
2 stops38h 35m
Lufthansa
Wed 8/197:30 pm
VAR
-
PHL
1 stop27h 35m
Lufthansa
Deal found 3/13$1,311

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 March 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$616
(United Airlines)

One-way from

$440
(Kiwi.com)

Popular in

January

Cheapest in

November

Average price

$546
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 ($1,699 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 69% potential price decrease ($539 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 18, 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

Tue 3/31

7:45 pm-6:40 pm

2 stops15h 55m

Sofia

Tue 4/7

2:10 pm-2:10 pm

2 stops31h 00m

$616

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 5/4

6:00 am-12:10 pm

2 stops23h 10m

Sofia

Tue 5/12

2:10 pm-9:48 am

2 stops26h 38m

$618
Quickest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

11:30 am-1:25 pm

2 stops18h 55m

Sofia

Wed 9/16

6:20 am-2:47 pm

2 stops15h 27m

$652

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

8:15 pm-1:25 pm

2 stops34h 10m

Sofia

Wed 9/16

9:25 pm-7:37 pm

2 stops29h 12m

$736

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Fri 7/24

6:10 am-1:15 pm

2 stops24h 05m

Sofia

Sat 8/29

6:20 am-9:21 pm

2 stops22h 01m

$860

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

6:45 pm-8:30 pm

1 stop18h 45m

Sofia

Thu 8/20

10:10 am-1:25 pm

1 stop34h 15m

$902

PhiladelphiaVarna

PHL - VAR

PHLVAR

Philadelphia

Wed 5/13

8:25 am-8:45 am

2 stops41h 20m

Varna

Wed 8/19

10:10 pm-8:19 am

2 stops41h 09m

$1,019

PhiladelphiaBurgas

PHL - BOJ

PHLBOJ

Philadelphia

Fri 9/4

5:40 pm-9:05 am

2 stops32h 25m

Bourgas

Wed 9/9

12:35 pm-4:05 pm

2 stops34h 30m

$1,254

PhiladelphiaVarna

PHL - VAR

PHLVAR

Philadelphia

Wed 5/13

4:20 pm-9:00 am

2 stops33h 40m

Varna

Wed 8/19

7:30 pm-4:05 pm

1 stop27h 35m

$1,317

PhiladelphiaVarna

PHL - VAR

PHLVAR

Philadelphia

Sun 5/10

3:25 pm-6:00 pm

3 stops19h 35m

Varna

Wed 8/19

7:25 pm-11:22 pm

3 stops34h 57m

$1,445

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/16

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

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 $223). Flying from Philadelphia to Bulgaria in May is currently the most expensive (average of $531). 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 March 18, 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
9,435 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

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
9,435 reviews
United Airlines
7.4
Good
9,435 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

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
7,858 reviews
United Airlines
7.4
Good
9,435 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

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 15h 55m. Fly via United Airlines, Turkish 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 - Varna or Philadelphia - Bourgas 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 $223). Flying from Philadelphia to Bulgaria in May is currently the most expensive (average of $531). 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 March 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$511Average$1,075FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$540Average$719FlexibilityNo cancel feeOn-time69%

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