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.

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.

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 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 offers the lowest fares from Philadelphia to Sofia?

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

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.

$480 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 - 4:00 pmSOF-PHL

16h 50m1 stop

$480Multiple Airlines

Find Deal

Tue, Mar 31 - Tue, Apr 7

3:30 pm - 6:40 pmPHL-SOF

20h 10m2 stops

12:50 pm - 2:46 pmSOF-PHL

32h 56m2 stops

$483Air Canada

Find Deal

Tue, Mar 31 - Tue, Apr 7

2:37 pm - 12:05 pmPHL-SOF

14h 28m2 stops

6:20 am - 4:00 pmSOF-PHL

16h 40m1 stop

$485United Airlines

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Tue, Apr 21 - Fri, May 1

5:35 pm - 6:00 pmPHL-SOF

17h 25m1 stop

6:10 am - 4:00 pmSOF-PHL

16h 50m1 stop

$487Lufthansa

Find Deal

Tue, Mar 31 - Tue, Apr 7

5:35 pm - 6:00 pmPHL-SOF

17h 25m1 stop

6:20 am - 4:00 pmSOF-PHL

16h 40m1 stop

$493United Airlines

Find Deal

Tue, Apr 21 - Fri, May 1

2:37 pm - 12:05 pmPHL-SOF

14h 28m2 stops

2:00 pm - 9:24 amSOF-PHL

26h 24m2 stops

$494United Airlines

Find Deal

Tue, Apr 21 - Fri, May 1

11:30 am - 2:00 pmPHL-SOF

19h 30m2 stops

7:00 am - 5:16 pmSOF-PHL

17h 16m2 stops

$500KLM

Find Deal

Tue, Mar 31 - Tue, Apr 7

6:45 pm - 8:40 pmPHL-SOF

18h 55m1 stop

9:10 pm - 4:40 pmSOF-PHL

26h 30m1 stop

$519British Airways

Find Deal

Tue, Apr 21 - Sun, May 3

3:30 pm - 6:00 pmPHL-SOF

19h 30m2 stops

12:50 pm - 10:29 pmSOF-PHL

16h 39m2 stops

$527Multiple Airlines

Find Deal

Tue, Apr 21 - Sat, May 2

5:35 pm - 1:15 pmPHL-SOF

12h 40m1 stop

6:10 am - 4:00 pmSOF-PHL

16h 50m1 stop

$543Lufthansa

Find Deal

Tue, Mar 31 - Tue, Apr 7

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

$483

Find similar

Air Canada

Apr 21

PHL4:25 pmPhiladelphia

18h 35m

2 stops

SOF6:00 pmSofia

May 3

SOF6:10 amSofia

22h 27m

2 stops

PHL9:37 pmPhiladelphia

$552

Find similar

Air Canada

Nov 6

PHL3:30 pmPhiladelphia

15h 20m

2 stops

SOF1:50 pmSofia

Nov 10

SOF1:45 pmSofia

40h 01m

2 stops

PHL10:46 pmPhiladelphia

$1,393

Find similar

United Airlines flights from Philadelphia to Sofia

Our best United Airlines deals on Philadelphia to Sofia flight tickets

United Airlines

Apr 21

PHL2:37 pmPhiladelphia

14h 28m

2 stops

SOF12:05 pmSofia

May 1

SOF6:20 amSofia

16h 40m

1 stop

PHL4:00 pmPhiladelphia

$485

Find similar

United Airlines

Apr 21

PHL5:35 pmPhiladelphia

17h 25m

1 stop

SOF6:00 pmSofia

May 1

SOF6:20 amSofia

16h 40m

1 stop

PHL4:00 pmPhiladelphia

$493

Find similar

United Airlines

Apr 21

PHL2:37 pmPhiladelphia

14h 28m

2 stops

SOF12:05 pmSofia

May 1

SOF2:00 pmSofia

26h 24m

2 stops

PHL9:24 amPhiladelphia

$494

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-4:00 pm

1 stop16h 50m

$480

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 3/31

3:30 pm-6:40 pm

2 stops20h 10m

Sofia

Tue 4/7

12:50 pm-2:46 pm

2 stops32h 56m

$483

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 4/21

2:37 pm-12:05 pm

2 stops14h 28m

Sofia

Fri 5/1

6:20 am-4:00 pm

1 stop16h 40m

$485

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 3/31

5:35 pm-6:00 pm

1 stop17h 25m

Sofia

Tue 4/7

6:10 am-4:00 pm

1 stop16h 50m

$487

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 4/21

5:35 pm-6:00 pm

1 stop17h 25m

Sofia

Fri 5/1

6:20 am-4:00 pm

1 stop16h 40m

$493

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 4/21

2:37 pm-12:05 pm

2 stops14h 28m

Sofia

Fri 5/1

2:00 pm-9:24 am

2 stops26h 24m

$494

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 3/31

11:30 am-2:00 pm

2 stops19h 30m

Sofia

Tue 4/7

7:00 am-5:16 pm

2 stops17h 16m

$500

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 4/21

6:45 pm-8:40 pm

1 stop18h 55m

Sofia

Sun 5/3

9:10 pm-4:40 pm

1 stop26h 30m

$519

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 4/21

3:30 pm-6:00 pm

2 stops19h 30m

Sofia

Sat 5/2

12:50 pm-10:29 pm

2 stops16h 39m

$527

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

$543

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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 February instead. Flights to Sofia in February, while not as cheap as those in October, still average around $560.

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 20m.
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 7,552 reviews		Search Lufthansa flights
United Airlines	PriceFrom $544	Free Cancellation	Rating 7.4 9,002 reviews		Search United Airlines flights

Bansko

Borovets

Velingrad

Sandanski

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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.

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Cheap flights from Philadelphia to Sofia from $480

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Sofia departing on 3/31. 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

Our best Air Canada deals on Philadelphia to Sofia flight tickets

United Airlines flights from Philadelphia to Sofia

Our best United Airlines 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