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$399+ 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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SOF
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap 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 July 30, 2025.

Round-trip from

$667
(Gotogate)

One-way from

$399
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$854
From Philadelphia to Sofia
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One-way flight from Philadelphia to Sofia
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Highest demand for flights based on searches. 23% potential increase in price ($252 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Philadelphia to Sofia

Cheapest flights from Philadelphia to Sofia
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 July 30, 2025.

This Gotogate deal was found by Cheapflights users on 7/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/223:25 pmPHL - SOF
2 stops24h 25mMultiple Airlines
Fri 1/166:15 amSOF - PHL
2 stops40h 34mMultiple Airlines
Deal found 7/29$667
This Gurufare deal was found by Cheapflights users on 7/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:50 pmPHL - SOF
1 stop17h 50mBritish Airways
Wed 4/19:30 pmSOF - PHL
1 stop22h 35mBritish Airways
Deal found 7/29$673
This United Airlines deal was found by Cheapflights users on 7/29. 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 10/15:35 pmPHL - SOF
1 stop12h 40mUnited Airlines
Wed 4/16:15 amSOF - PHL
2 stops15h 22mUnited Airlines
Deal found 7/29$685
This Lufthansa deal was found by Cheapflights users on 7/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/305:35 pmPHL - SOF
1 stop12h 45mLufthansa
Tue 3/316:15 amSOF - PHL
1 stop16h 45mLufthansa
Deal found 7/29$686
This Air Canada deal was found by Cheapflights users on 7/29. 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.
Sat 9/274:50 pmPHL - SOF
2 stops36h 10mAir Canada
Wed 3/251:55 pmSOF - PHL
2 stops30h 52mAir Canada
Deal found 7/29$700
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:45 pmPHL - SOF
2 stops18h 35mAmerican Airlines
Sat 3/2812:05 pmSOF - PHL
2 stops26h 55mAmerican Airlines
Deal found 7/29$790

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 2,558,603 searches. Data last updated July 30, 2025.
Use the filters below to find and compare flights from Philadelphia to Sofia that are best for you.

Fly from

Philadelphia

Fly to

Sofia

Route

Depart

Return

Price

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 9/22

3:25 pm-10:50 pm

2 stops24h 25m

Sofia

Fri 1/16

6:15 am-3:49 pm

2 stops40h 34m

$667

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 9/30

7:50 pm-8:40 pm

1 stop17h 50m

Sofia

Wed 4/1

9:30 pm-1:05 pm

1 stop22h 35m

$673

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 10/1

3:25 pm-1:15 pm

2 stops14h 50m

Sofia

Wed 4/1

6:15 am-2:37 pm

2 stops15h 22m

$685

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sat 10/4

4:50 pm-12:00 pm

2 stops36h 10m

Sofia

Thu 4/2

6:15 am-4:00 pm

1 stop16h 45m

$688

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sat 9/27

4:50 pm-12:00 pm

2 stops36h 10m

Sofia

Wed 3/25

1:55 pm-2:47 pm

2 stops30h 52m

$700

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sat 9/27

6:45 pm-8:20 pm

2 stops18h 35m

Sofia

Sat 3/28

12:05 pm-9:00 am

2 stops26h 55m

$790

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 10/19

4:03 pm-6:20 pm

2 stops19h 17m

$399

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 10/19

6:30 pm-7:10 pm

1 stop17h 40m

$457

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Fri 10/17

5:35 pm-1:25 pm

1 stop12h 50m

$525

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Fri 10/17

1:42 pm-2:00 pm

2 stops17h 18m

$532

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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.
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 $632). Flying from Philadelphia to Sofia in June is currently the most expensive (average of $1,187). 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 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 July 30, 2025.
Read reviews from past customers who have flown Air France, United Airlines, and American Airlines 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.
Air France
7.5
Good
1,465 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.4

Food

7.0

Comfort

7.4

Overall

7.5

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
Air France
7.5
Good
1,465 reviews
Air France
7.5
Good
1,465 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.4

Food

7.0

Comfort

7.4

Overall

7.5

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
United Airlines
7.4
Good
8,896 reviews
Air France
7.5
Good
1,465 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.4

Food

7.0

Comfort

7.4

Overall

7.5

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
American Airlines
7.2
Good
10,000 reviews
Air France
7.5
Good
1,465 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.4

Food

7.0

Comfort

7.4

Overall

7.5

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
Air Canada
7.1
Good
9,837 reviews
Air France
7.5
Good
1,465 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.4

Food

7.0

Comfort

7.4

Overall

7.5

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
Lufthansa
6.8
Okay
7,269 reviews
Air France
7.5
Good
1,465 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.4

Food

7.0

Comfort

7.4

Overall

7.5

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.

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.

  • What are the cheapest airlines flying from Philadelphia to Sofia round-trip?

    According to our current data, British Airways ($673), United Airlines ($685), and Lufthansa ($688) offers the cheapest pricing from Philadelphia to Sofia. These flights start at 16% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Philadelphia to Sofia one-way?

    $457 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Lufthansa and Air France, with prices starting from $525 and $532, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Philadelphia to Sofia 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 Sofia?

    Currently, November is the cheapest month in which you can book a flight from Philadelphia to Sofia (average of $632). Flying from Philadelphia to Sofia in June is currently the most expensive (average of $1,187). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Philadelphia to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Sofia flights
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Pittsburgh to Sofia flights

Top 3 airlines flying from Philadelphia to Sofia

Discover the top 3 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 2,558,603 searches. Data last updated July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$560Average$776FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$617Average$847FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$646Average$795FlexibilityNo cancel feeOn-time69%

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