What airlines fly to Sofia?

Lufthansa, United Airlines and Turkish Airlines are the top three most popular airlines that fly to Sofia from Philadelphia according to our data. Lufthansa is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 12 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Philadelphia to Sofia?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 4h 14m.

Which layover airport offers the lowest fares from Philadelphia to Sofia?

Flights via London (LHR) offer the lowest average round-trip price of $649.

Which layover airport has the shortest travel time from Philadelphia to Sofia?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 12h 53m.

Which airport is the most popular layover for flights between Philadelphia and Sofia?

Frankfurt am Main (FRA) was the most common stop: 97% of momondo users choosing 1-stop flights on this route connected there.

When did momondo last update prices for flights from Philadelphia Airport to Sofia Airport?

Prices for flights from Philadelphia Airport to Sofia Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Philadelphia Airport to Sofia Airport?

The number of operators available for flights from Philadelphia Airport to Sofia Airport is 2 as of April 2026.

How old do you have to be to fly from Philadelphia Airport to Sofia Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The travel and health documents required for your trip to Sofia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sofia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$482 Cheap Flights from Philadelphia to Sofia in 2026

Q: What is the typical price of a round-trip flight between Philadelphia and Sofia?

Prices are currently high for flights on this route. Typical prices usually range from $719 to $514. The lowest price recently found on this route was $750.

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Find the cheapest flights from Philadelphia to Sofia

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:05 am - 6:10 pm

PHL

SOF

25h 05m

2 stops

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$750United Airlines

Sun, Aug 2 - Fri, Oct 9

10:05 am - 6:10 pm

PHL

SOF

25h 05m

2 stops

6:10 am - 9:32 pm

SOF

PHL

22h 22m

2 stops

$753United Airlines

Sun, Aug 2 - Tue, Oct 13

10:05 am - 6:10 pm

PHL

SOF

25h 05m

2 stops

6:10 am - 10:46 pm

SOF

PHL

23h 36m

2 stops

$759United Airlines

Sun, Aug 2 - Fri, Oct 9

10:05 am - 6:10 pm

PHL

SOF

25h 05m

2 stops

2:20 pm - 4:05 pm

SOF

PHL

32h 45m

1 stop

$771United Airlines

Sun, Aug 2 - Mon, Oct 12

10:28 am - 6:40 pm

PHL

SOF

25h 12m

2 stops

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$798United Airlines

Wed, Sep 9 - Sun, Sep 27

10:28 am - 6:40 pm

PHL

SOF

25h 12m

2 stops

6:20 am - 9:45 am

SOF

PHL

34h 25m

2 stops

$806United Airlines

Wed, Sep 9 - Sun, Sep 27

1:55 pm - 1:25 pm

PHL

SOF

40h 30m

2 stops

9:25 pm - 4:40 pm

SOF

PHL

26h 15m

1 stop

$813British Airways

Wed, Sep 9 - Wed, Sep 16

5:40 pm - 1:25 pm

PHL

SOF

36h 45m

2 stops

9:25 pm - 4:40 pm

SOF

PHL

26h 15m

1 stop

$814British Airways

Wed, Sep 9 - Wed, Sep 16

12:36 pm - 2:00 pm

PHL

SOF

18h 24m

2 stops

7:00 am - 7:58 pm

SOF

PHL

19h 58m

2 stops

$817Air France

Tue, Aug 4 - Thu, Aug 20

1:10 pm - 2:00 pm

PHL

SOF

17h 50m

2 stops

7:00 am - 7:58 pm

SOF

PHL

19h 58m

2 stops

$818Air France

Tue, Aug 4 - Thu, Aug 20

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Air France flights from Philadelphia to Sofia

Our best Air France deals on Philadelphia to Sofia flight tickets

Air France

Aug 4

PHL12:36 pmPhiladelphia

18h 24m

2 stops

SOF2:00 pmSofia

Aug 20

SOF7:00 amSofia

19h 58m

2 stops

PHL7:58 pmPhiladelphia

$817

Air France

Aug 4

PHL1:10 pmPhiladelphia

17h 50m

2 stops

SOF2:00 pmSofia

Aug 20

SOF7:00 amSofia

19h 58m

2 stops

PHL7:58 pmPhiladelphia

$818

United Airlines flights from Philadelphia to Sofia

Our best United Airlines deals on Philadelphia to Sofia flight tickets

United Airlines

Aug 2

PHL10:05 amPhiladelphia

25h 05m

2 stops

SOF6:10 pmSofia

Oct 9

SOF6:20 amSofia

16h 45m

1 stop

PHL4:05 pmPhiladelphia

$750

United Airlines

Aug 2

PHL10:05 amPhiladelphia

25h 05m

2 stops

SOF6:10 pmSofia

Oct 13

SOF6:10 amSofia

22h 22m

2 stops

PHL9:32 pmPhiladelphia

$753

United Airlines

Aug 2

PHL10:05 amPhiladelphia

25h 05m

2 stops

SOF6:10 pmSofia

Oct 9

SOF6:10 amSofia

23h 36m

2 stops

PHL10:46 pmPhiladelphia

$759

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 8/2

10:05 am-6:10 pm

2 stops25h 05m

Sofia

Fri 10/9

6:20 am-4:05 pm

1 stop16h 45m

$750

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 8/2

10:05 am-6:10 pm

2 stops25h 05m

Sofia

Tue 10/13

6:10 am-9:32 pm

2 stops22h 22m

$753

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 8/2

10:05 am-6:10 pm

2 stops25h 05m

Sofia

Fri 10/9

6:10 am-10:46 pm

2 stops23h 36m

$759

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 8/2

10:05 am-6:10 pm

2 stops25h 05m

Sofia

Mon 10/12

2:20 pm-4:05 pm

1 stop32h 45m

$771

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

10:28 am-6:40 pm

2 stops25h 12m

Sofia

Sun 9/27

6:20 am-4:05 pm

1 stop16h 45m

$798

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

10:28 am-6:40 pm

2 stops25h 12m

Sofia

Sun 9/27

6:20 am-9:45 am

2 stops34h 25m

$806

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

1:55 pm-1:25 pm

2 stops40h 30m

Sofia

Wed 9/16

9:25 pm-4:40 pm

1 stop26h 15m

$813

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 9/9

5:40 pm-1:25 pm

2 stops36h 45m

Sofia

Wed 9/16

9:25 pm-4:40 pm

1 stop26h 15m

$814

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

12:36 pm-2:00 pm

2 stops18h 24m

Sofia

Thu 8/20

7:00 am-7:58 pm

2 stops19h 58m

$817

Quickest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

1:10 pm-2:00 pm

2 stops17h 50m

Sofia

Thu 8/20

7:00 am-7:58 pm

2 stops19h 58m

$818

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from Philadelphia to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Philadelphia and Sofia?

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Philadelphia is in November. Flight prices, which tend to average around $540, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Sofia from Philadelphia during March instead. Flights to Sofia in March, while not as cheap as those in November, still average around $546.

Can stopping save me money on Philadelphia to Sofia flights?

You could potentially save up to 4% on your flight if you consider stops on a Philadelphia to Sofia flight.

When to book flights from Philadelphia to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Sofia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Philadelphia to Sofia (PHL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Sofia

Fastest flight time	15h 13m
Direct flights	None

The fastest flight from Philadelphia to Sofia takes 15h 13m

There are no direct flights from Philadelphia to Sofia. There are no popular flight routes from Philadelphia to Sofia.

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Frequently asked questions about flying from Philadelphia to Sofia

How far is Philadelphia to Sofia by plane?
Sofia is 4789.3 mi away from Philadelphia. In terms of flight time, this usually takes a little over 15h 13m.
When did momondo last update prices for flights from Philadelphia Airport to Sofia Airport?
Prices for flights from Philadelphia Airport to Sofia Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Philadelphia Airport to Sofia Airport?
The number of operators available for flights from Philadelphia Airport to Sofia Airport is 2 as of April 2026.
How old do you have to be to fly from Philadelphia Airport to Sofia Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents required for your trip to Sofia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sofia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Philadelphia to Sofia?
Based on momondo bookings for flights between Philadelphia and Sofia, the leading airline is Lufthansa, making up 72% of the total bookings. Other popular airlines include United Airlines with 28%.

Best airlines flying from Philadelphia to Sofia

Compare and see reviews for airlines that fly from Philadelphia to Sofia with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $511	Free Cancellation	Rating 6.8 7,930 reviews		Search Lufthansa flights
United Airlines	PriceFrom $540	Free Cancellation	Rating 7.4 9,603 reviews		Search United Airlines flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Philadelphia to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from Philadelphia to Sofia with flexible booking policies on momondo?

momondo does allow users to show only those flights to Sofia from Philadelphia which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Philadelphia to Sofia?

Once you have performed a search for Philadelphia to Sofia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Philadelphia to Sofia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Sofia from Philadelphia. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.