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

Frankfurt am Main (FRA) was the most common stop: 96% of momondo users choosing 1-stop flights on this route connected there.

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 21m.

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: 13h 05m.

What airlines fly to Sofia?

United Airlines, Lufthansa and Turkish Airlines are the top three most popular airlines that fly to Sofia from Philadelphia according to our data. United Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 11 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

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 November 2025.

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.

$327 Cheap Flights from Philadelphia to Sofia in 2025/26

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3:30 pm - 6:40 pmPHL-SOF

20h 10m2 stops

6:10 am - 2:46 pmSOF-PHL

39h 36m2 stops

$473Air Canada

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Tue, Mar 31 - Tue, Apr 7

3:30 pm - 1:15 pmPHL-SOF

14h 45m2 stops

6:10 am - 4:00 pmSOF-PHL

16h 50m1 stop

$478Multiple Airlines

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Tue, Mar 31 - Tue, Apr 7

5:35 pm - 1:15 pmPHL-SOF

12h 40m1 stop

6:10 am - 4:00 pmSOF-PHL

16h 50m1 stop

$481Lufthansa

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Tue, Mar 31 - Tue, Apr 7

10:34 am - 6:20 pmPHL-SOF

24h 46m2 stops

6:00 am - 4:05 pmSOF-PHL

17h 05m1 stop

$484United Airlines

Find Deal

Mon, Dec 1 - Thu, Jan 15

10:34 am - 6:20 pmPHL-SOF

24h 46m2 stops

2:35 pm - 3:49 pmSOF-PHL

32h 14m2 stops

$489United Airlines

Find Deal

Mon, Dec 1 - Thu, Jan 15

10:34 am - 10:45 pmPHL-SOF

29h 11m2 stops

6:05 am - 3:49 pmSOF-PHL

40h 44m2 stops

$493United Airlines

Find Deal

Mon, Dec 1 - Wed, Jan 14

10:34 am - 6:20 pmPHL-SOF

24h 46m2 stops

2:20 pm - 2:47 pmSOF-PHL

31h 27m2 stops

$502United Airlines

Find Deal

Mon, Dec 1 - Mon, Jan 19

10:34 am - 10:45 pmPHL-SOF

29h 11m2 stops

1:45 pm - 3:49 pmSOF-PHL

57h 04m2 stops

$503United Airlines

Find Deal

Mon, Dec 1 - Mon, Jan 12

10:34 am - 6:20 pmPHL-SOF

24h 46m2 stops

6:00 am - 2:10 pmSOF-PHL

39h 10m2 stops

$529United Airlines

Find Deal

Mon, Dec 1 - Thu, Jan 8

1:10 pm - 6:20 pmPHL-SOF

22h 10m2 stops

6:10 am - 4:05 pmSOF-PHL

16h 55m1 stop

$535United Airlines

Find Deal

Wed, Jan 21 - Sun, Jan 25

Air Canada flights from Philadelphia to Sofia

Our best Air Canada deals on Philadelphia to Sofia flight tickets

Air Canada

Mar 31

PHL3:30 pmPhiladelphia

20h 10m

2 stops

SOF6:40 pmSofia

Apr 7

SOF6:10 amSofia

39h 36m

2 stops

PHL2:46 pmPhiladelphia

$473

Find similar

Air Canada

Jan 21

PHL4:35 pmPhiladelphia

18h 45m

2 stops

SOF6:20 pmSofia

Jan 25

SOF2:00 pmSofia

31h 47m

2 stops

PHL2:47 pmPhiladelphia

$539

Find similar

Air Canada

Nov 30

PHL4:35 pmPhiladelphia

37h 50m

2 stops

SOF1:25 pmSofia

Jan 20

SOF2:15 pmSofia

15h 31m

2 stops

PHL10:46 pmPhiladelphia

$894

Find similar

Lufthansa flights from Philadelphia to Sofia

Our best Lufthansa deals on Philadelphia to Sofia flight tickets

Lufthansa

Mar 31

PHL5:35 pmPhiladelphia

12h 40m

1 stop

SOF1:15 pmSofia

Apr 7

SOF6:10 amSofia

16h 50m

1 stop

PHL4:00 pmPhiladelphia

$481

Find similar

Lufthansa

Nov 27

PHL5:40 pmPhiladelphia

22h 05m

1 stop

SOF10:45 pmSofia

Jan 15

SOF6:00 amSofia

17h 05m

1 stop

PHL4:05 pmPhiladelphia

$547

Find similar

Lufthansa

Nov 27

PHL5:40 pmPhiladelphia

22h 05m

1 stop

SOF10:45 pmSofia

Jan 14

SOF2:25 pmSofia

32h 40m

1 stop

PHL4:05 pmPhiladelphia

$567

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 3/31

3:30 pm-6:40 pm

2 stops20h 10m

Sofia

Tue 4/7

6:10 am-2:46 pm

2 stops39h 36m

$473

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 3/31

3:30 pm-1:15 pm

2 stops14h 45m

Sofia

Tue 4/7

6:10 am-4:00 pm

1 stop16h 50m

$478

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 3/31

5:35 pm-1:15 pm

1 stop12h 40m

Sofia

Tue 4/7

6:10 am-4:00 pm

1 stop16h 50m

$481

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 12/1

10:34 am-6:20 pm

2 stops24h 46m

Sofia

Thu 1/15

6:00 am-4:05 pm

1 stop17h 05m

$484

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 12/1

10:34 am-6:20 pm

2 stops24h 46m

Sofia

Thu 1/15

2:35 pm-3:49 pm

2 stops32h 14m

$489

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 12/1

10:34 am-10:45 pm

2 stops29h 11m

Sofia

Wed 1/14

6:05 am-3:49 pm

2 stops40h 44m

$493

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 12/1

10:34 am-6:20 pm

2 stops24h 46m

Sofia

Mon 1/19

2:20 pm-2:47 pm

2 stops31h 27m

$502

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 12/1

10:34 am-10:45 pm

2 stops29h 11m

Sofia

Mon 1/12

1:45 pm-3:49 pm

2 stops57h 04m

$503

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 12/1

10:34 am-6:20 pm

2 stops24h 46m

Sofia

Thu 1/8

6:00 am-2:10 pm

2 stops39h 10m

$529

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Wed 1/21

1:10 pm-6:20 pm

2 stops22h 10m

Sofia

Sun 1/25

6:10 am-4:05 pm

1 stop16h 55m

$535

Flights are sorted by cheapest round-trip flights first.

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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 cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Philadelphia is in October. Flight prices, which tend to average around $518, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from Philadelphia during November instead. Flights to Sofia in November, while not as cheap as those in October, still average around $540.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Tuesday is the cheapest day to fly to Sofia from Philadelphia. The lowest ticket price found for a Tuesday departure recently was $741. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Philadelphia to Sofia on a Saturday will generally be more expensive and average around $1,491. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the evening is the cheapest time of day to fly from Philadelphia to Sofia when you can find flight prices for as low as $838. Flying to Sofia in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,318 per ticket.

Can stopping save me money on Philadelphia to Sofia flights?

You could potentially save up to 8% 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

Direct flights	None

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

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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 12h 40m.
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 November 2025.
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 78% of the total bookings. Other popular airlines include United Airlines with 22%.

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 7,579 reviews		Search Lufthansa flights
United Airlines	PriceFrom $544	Free Cancellation	Rating 7.4 9,028 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.

An easier way to manage your Sofia trip

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Cheap flights from Philadelphia to Sofia from $327

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Sofia departing on 12/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from Philadelphia to Sofia

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Our best Lufthansa deals on Philadelphia to Sofia flight tickets

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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

What is the cheapest month to fly to Sofia?

What is the cheapest day to depart on your flight to Sofia?

What is the cheapest time of day to depart on your flight to Sofia?

Can stopping save me money on Philadelphia to Sofia flights?

You could potentially save up to 8% on your flight if you consider stops on a Philadelphia to Sofia flight.

What airlines fly to Sofia?

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

Frankfurt am Main (FRA) was the most common stop: 96% of momondo users choosing 1-stop flights on this route connected there.

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: 13h 05m.

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 21m.

When to book flights from Philadelphia to Sofia

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

Direct flights

How far is Philadelphia to Sofia by plane?

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

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

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

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

What is the most popular airline from Philadelphia to Sofia?

Best airlines flying from Philadelphia to Sofia

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

Traveling to a place near Sofia?

Why use momondo?

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

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

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

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

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Bulgaria

Fly your favorite airline to Sofia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo