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$303+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SOF
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
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 diciembre 12, 2025.

This Mytrip deal was found by Cheapflights users on 12/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/105:30 amPHL - SOF
3 stops26h 45mMultiple Airlines
mié. 1/142:00 pmSOF - PHL
2 stops31h 47mMultiple Airlines
Deal found 12/9$1,490
This Mytrip deal was found by Cheapflights users on 12/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/105:30 amPHL - SOF
3 stops26h 45mMultiple Airlines
jue. 12/252:35 pmSOF - PHL
2 stops15h 11mMultiple Airlines
Deal found 12/9$1,501
This Mytrip deal was found by Cheapflights users on 12/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/105:30 amPHL - SOF
3 stops26h 45mMultiple Airlines
vie. 12/262:35 pmSOF - PHL
1 stop33h 00mMultiple Airlines
Deal found 12/9$1,513
This United Airlines deal was found by Cheapflights users on 12/9. 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.
mié. 12/101:15 pmPHL - SOF
2 stops26h 30mUnited Airlines
mié. 1/146:10 amSOF - PHL
2 stops15h 37mUnited Airlines
Deal found 12/9$1,517
This KLM deal was found by Cheapflights users on 12/9. 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.
mié. 12/1010:32 amPHL - SOF
2 stops20h 33mKLM
jue. 12/257:00 amSOF - PHL
2 stops22h 11mKLM
Deal found 12/9$1,529

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 diciembre 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$479
(KAYAK)

One-way from

$303
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$719
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. 22% potential increase in price ($223 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 diciembre 12, 2025.
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

mar. 3/31

2:56 pm-12:05 pm

2 stops14h 09m

Sofia

mar. 4/7

6:10 am-4:00 pm

1 stop16h 50m

$486

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

dom. 3/29

2:56 pm-11:10 pm

2 stops25h 14m

Sofia

mar. 4/7

6:10 am-4:00 pm

1 stop16h 50m

$486

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mié. 4/1

10:00 am-11:10 pm

2 stops30h 10m

Sofia

mié. 4/8

6:20 am-2:46 pm

2 stops15h 26m

$489

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

dom. 3/29

2:56 pm-11:10 pm

2 stops25h 14m

Sofia

mié. 4/8

6:20 am-2:46 pm

2 stops15h 26m

$489

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mar. 3/31

5:35 pm-6:00 pm

1 stop17h 25m

Sofia

mar. 4/7

6:10 am-4:00 pm

1 stop16h 50m

$490

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

dom. 3/29

10:35 am-6:40 pm

2 stops25h 05m

Sofia

vie. 4/10

6:20 am-10:28 am

2 stops35h 08m

$496

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mar. 3/31

5:35 pm-6:00 pm

1 stop17h 25m

Sofia

mié. 4/8

6:20 am-2:46 pm

2 stops15h 26m

$497

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mar. 3/31

5:35 pm-6:00 pm

1 stop17h 25m

Sofia

vie. 4/10

6:20 am-10:28 am

2 stops35h 08m

$504

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

jue. 1/15

8:43 pm-11:55 am

2 stops56h 12m

$303

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

jue. 5/28

3:15 pm-1:30 am

3 stops27h 15m

$569

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

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 $233). Flying from Philadelphia to Bulgaria in May is currently the most expensive (average of $572). 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 diciembre 12, 2025.
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
9,095 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Lufthansa
6.8
Okay
7,626 reviews
United Airlines
7.4
Good
9,095 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 or Air Canada 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 $233). Flying from Philadelphia to Bulgaria in May is currently the most expensive (average of $572). 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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$511Average$878FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$540Average$794FlexibilityNo cancel feeOn-time69%

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