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Sofia

$473+ Cheap flights from Philadelphia (PHL) to Sofia (SOF)

PHL — SOF
Nov 30 — Dec 71
Mon 11/30
Mon 12/7
1 adult, Economy
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1. Tell us where you want to go

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2. Select your favorite providers

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3. Compare prices and book

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Cheap flight deals from Philadelphia to Sofia

Cheapest flights from Philadelphia to Sofia

Sun 11/295:40 pm -
1 stop12h 45m
Tue 12/156:25 am -
1 stop16h 40m
Deal found 10/30$690
Sun 11/299:15 am -
2 stops30h 45m
Tue 12/156:25 am -
1 stop16h 40m
Deal found 10/30$728
Sun 11/295:05 pm -
2 stops22h 55m
Tue 12/152:10 pm -
2 stops15h 36m
Deal found 10/30$736
Sat 10/316:46 pm -
2 stops46h 14m
Mon 11/97:55 am -
2 stops39h 10m
Deal found 10/29$757
Sun 12/135:40 pm -
1 stop12h 45m
Sun 12/206:25 am -
1 stop16h 40m
Deal found 10/29$763
Sun 12/135:40 pm -
1 stop12h 45m
Sun 12/206:45 pm -
2 stops52h 20m
Deal found 10/29$778
Sun 12/135:40 pm -
2 stops23h 15m
Sun 12/207:55 am -
2 stops15h 10m
Deal found 10/29$795

Find flight deals from Philadelphia to Sofia

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$690
(Gotogate)

One-way from

$473
(Kiwi.com)

Popular in

January

Cheapest in

March

Average price

$812
Provider with most accurate pricing for Philadelphia-Sofia flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Sofia flights.
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From Philadelphia to Sofia
Search Deals
One-way flight from Philadelphia to Sofia
Search Deals
Highest demand for flights based on searches. 55% potential increase in price ($1,712 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 64% potential price decrease ($535 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Philadelphia to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 12/15

11:07 am-11:20 am

3 stops41h 13m

Sofia

Wed 12/31

12:00 am-5:00 pm

Nonstop0h 00m

$473
Quickest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 12/15

5:40 pm-1:25 pm

1 stop12h 45m

Sofia

Wed 12/31

12:00 am-5:00 pm

Nonstop0h 00m

$531

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 12/15

6:35 pm-8:10 pm

1 stop18h 35m

Sofia

Wed 12/31

12:00 am-5:00 pm

Nonstop0h 00m

$550

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 11/29

9:15 am-11:00 pm

2 stops30h 45m

Sofia

Tue 12/15

6:25 am-4:05 pm

1 stop16h 40m

$728

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 4/20

1:00 pm-12:20 pm

2 stops16h 20m

Sofia

Thu 4/22

6:20 am-4:00 pm

1 stop16h 40m

$732

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 4/20

3:20 pm-6:45 pm

2 stops20h 25m

Sofia

Thu 4/22

1:05 pm-2:41 pm

2 stops32h 36m

$736

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 12/13

5:40 pm-1:25 pm

1 stop12h 45m

Sofia

Sun 12/20

6:25 am-4:05 pm

1 stop16h 40m

$763

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 12/13

5:40 pm-1:25 pm

1 stop12h 45m

Sofia

Sun 12/20

6:45 pm-4:05 pm

2 stops52h 20m

$778

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 4/5

5:35 pm-6:15 pm

1 stop17h 40m

Sofia

Mon 5/17

7:00 pm-4:00 pm

1 stop28h 00m

$793

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 12/13

5:40 pm-11:55 pm

2 stops23h 15m

Sofia

Sun 12/20

7:55 am-4:05 pm

2 stops15h 10m

$795

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Sorted by cheapest first

Compare providers for flights from Philadelphia to Sofia

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Sofia in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice Accuracy2 starsTrust Score*3 stars
BusinessClassPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Sofia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Sofia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Sofia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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, March is the cheapest month in which you can book a flight from Philadelphia to Sofia (average of $546). Flying from Philadelphia to Sofia 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 Sofia

Read reviews from past customers who have flown United Airlines and Lufthansa 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.
United Airlines
7.3
Good
10,460 reviews

Overall

7.3

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.7

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
United Airlines
7.3
Good
10,460 reviews
United Airlines
7.3
Good
10,460 reviews

Overall

7.3

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.7

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
Lufthansa
6.8
Okay
8,299 reviews
United Airlines
7.3
Good
10,460 reviews

Overall

7.3

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.7

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

Related info for your journey

  • How long is the flight from Philadelphia to Sofia?

    A quick flight from Philadelphia to Sofia can take about 30h 45m. United Airlines provides one of the quickest options available for as low as $728. Philadelphia and Sofia are separated by a distance of 4800 mi.

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

    According to our current data, United Airlines ($540), and Lufthansa ($546) offers the cheapest pricing from Philadelphia to Sofia. These flights start at 60% lower than the current average price 3 months from now.

  • 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, March is the cheapest month in which you can book a flight from Philadelphia to Sofia (average of $546). Flying from Philadelphia to Sofia 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Philadelphia to Sofia

John F Kennedy Intl to Sofia flights
Newark to Sofia flights
Dulles Intl to Sofia flights
Pittsburgh to Sofia flights

Top 2 airlines flying from Philadelphia to Sofia

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$540Average$737FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$546Average$800FlexibilityNo cancel feeOn-time76%

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