Which airports can I use when flying from Philadelphia to Sofia?

Flights from Philadelphia to Sofia usually depart from Philadelphia (PHL) and arrive at Sofia (SOF).

What cabin classes can I book on flights from Philadelphia to Sofia?

Two cabin classes are available on flights from Philadelphia to Sofia: • Economy Class • Business Class

Which airports do connecting flights from Philadelphia to Sofia pass through?

Connecting flights from Philadelphia to Sofia most commonly pass through: • Frankfurt am Main (FRA) - 99% of one-stop connections • London Heathrow (LHR) - 1% of one-stop connections

Can I save money by using flexible dates for flights from Philadelphia to Sofia?

Yes. Flexible dates can save you up to 49% on flights from Philadelphia to Sofia. Thursday is the cheapest departure day at $546 round-trip on average, while Wednesday is the most expensive at $1,066, a difference of $520. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Sofia?

Some of the most popular sights in Sofia are Vasil Levski National Stadium, National Palace of Culture and Central Sofia Market Hall. These are among the most viewed places in Sofia on KAYAK.

How long is a flight from Philadelphia to Sofia?

A nonstop flight from Philadelphia to Sofia takes 00m, covering 4,800 miles.

Do I need a passport to fly from Philadelphia to Sofia?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Philadelphia to Sofia changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $690 to $1,962. That means the highest observed fare was about 3x higher than the lowest one.

How are flight prices from Philadelphia to Sofia looking right now?

One-way fares from Philadelphia to Sofia are currently lower than usual. Average one-way flight prices are about $454, which is 20% below the typical average for this route.

How much time can I save by choosing a different layover airport from Philadelphia to Sofia?

Flying via London Heathrow (LHR) gives the shortest average 1-stop total travel time at 13h 42m, compared with 15h 26m via Frankfurt am Main (FRA).

What is the time difference between Philadelphia and Sofia?

Sofia is 6 hours ahead of Philadelphia (Eastern European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Sofia Airport (SOF)?

Sofia Airport (SOF) hosts 5 major car rental companies, with daily rates averaging $21 for economy cars. Top options include: • MEXRENTACAR • NU Car • Top Rent a Car - Bulgaria • Priceless • Easyrent

How much should I expect to pay for a Philadelphia to Sofia flight?

Round-trip flights from Philadelphia to Sofia range from $546 to $1,033, with an average of $808 over the past 12 months. Anything below $546 counts as a good deal.

How much is a round-trip flight from Philadelphia to Sofia?

Round-trip flights from Philadelphia to Sofia typically range from $546 to $1,033. The lowest price found in the past 5 days was $690, on Lufthansa.

What's the cheapest day of the week to fly from Philadelphia to Sofia?

Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from Philadelphia to Sofia. It’s 33% cheaper than the average day, while Wednesday is the most expensive, with prices 31% higher.

What’s the cheapest month to fly from Philadelphia to Sofia?

•November is the cheapest month to fly from Philadelphia to Sofia at $540 round-trip. •May ($1,176) and December ($1,110) are the most expensive months. •The price difference between flying in the cheapest and most expensive months is 117% on average. This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Which airline is the cheapest to fly from Philadelphia to Sofia?

Lufthansa ($690) and United Airlines ($723) are the cheapest airlines to fly round-trip from Philadelphia to Sofia according to KAYAK data over the last 5 days.

What’s the most popular layover airport when flying from Philadelphia to Sofia?

Frankfurt am Main (FRA) is the most popular layover for the Philadelphia to Sofia route. 99% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via FRA.

What is the cheapest layover airport when flying from Philadelphia to Sofia?

Flights via London Heathrow (LHR) offer the most affordable fares, with an average round-trip price of $785. Based on KAYAK data over the past 3 months.

When flying from Philadelphia to Sofia which airport offers the shortest layover?

London Heathrow (LHR) had the shortest average connection time for Philadelphia to Sofia layovers at 8h 27m over the past 3 months.

$361 CHEAP FLIGHTS from Philadelphia to Sofia (PHL - SOF)

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$690

Typical prices: $546-$1,033

Lufthansa

Thu 11/29Sat 12/15

PHL - SOF • 1 stop

Cheapest one-way

$361

Typical prices: $418-$704

Multiple Airlines

Fri 11/16

PHL - SOF • 1 stop

Nonstop flights

Not available

There are currently no direct flights between Philadelphia and Sofia. You'll need to take a connecting flight to reach the destination.

Insights

When to travel

November

Cheapest • 33% price drop

April

Most popular

Good to know

Top layover airports

London Heathrow (LHR)

Cheapest • Avg $785 (round-trip)

Frankfurt am Main (FRA)

Shortest trip • 15h 26m (one-way)

Insights

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KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Sofia!

Flight Deals

Cheap Flights from Philadelphia to Sofia (PHL-SOF)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Philadelphia to Sofia

Sun, Nov 29 - Tue, Dec 15

5:40 pm - 1:25 pmPHL Philadelphia-SOF Sofia

12h 45m1 stop Frankfurt am Main

6:25 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 40m1 stop Frankfurt am Main

$690Lufthansa

Sat, Feb 20 - Fri, Feb 26

3:20 pm - 2:15 pmPHL Philadelphia-SOF Sofia

39h 55m2 stops Montreal Pierre Elliott Trudeau Intl Zurich

6:25 am - 4:21 pmSOF Sofia-PHL Philadelphia

40h 56m2 stops Frankfurt am Main Toronto Pearson Intl

$707Multiple Airlines

Sun, Nov 29 - Tue, Dec 15

5:40 pm - 10:55 pmPHL Philadelphia-SOF Sofia

22h 15m2 stops Frankfurt am Main Munich Franz Josef Strauss

6:25 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 40m1 stop Frankfurt am Main

$715Lufthansa

Tue, Apr 20 - Thu, Apr 22

1:00 pm - 12:20 pmPHL Philadelphia-SOF Sofia

16h 20m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:20 am - 4:00 pmSOF Sofia-PHL Philadelphia

16h 40m1 stop Frankfurt am Main

$723United Airlines

Tue, Apr 20 - Thu, Apr 22

10:15 am - 12:20 pmPHL Philadelphia-SOF Sofia

19h 05m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:20 am - 2:41 pmSOF Sofia-PHL Philadelphia

15h 21m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$726United Airlines

Sun, Nov 29 - Tue, Dec 15

5:40 pm - 10:55 pmPHL Philadelphia-SOF Sofia

22h 15m2 stops Frankfurt am Main Munich Franz Josef Strauss

6:00 am - 4:05 pmSOF Sofia-PHL Philadelphia

17h 05m2 stops Munich Franz Josef Strauss Frankfurt am Main

$732Lufthansa

Tue, Apr 20 - Thu, Apr 22

1:00 pm - 12:20 pmPHL Philadelphia-SOF Sofia

16h 20m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:20 am - 4:00 pmSOF Sofia-PHL Philadelphia

16h 40m1 stop Frankfurt am Main

$733United Airlines

Tue, Apr 20 - Thu, Apr 22

3:20 pm - 6:45 pmPHL Philadelphia-SOF Sofia

20h 25m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

1:05 pm - 2:41 pmSOF Sofia-PHL Philadelphia

32h 36m2 stops Munich Franz Josef Strauss Montreal Pierre Elliott Trudeau Intl

$736Air Canada

Sun, Dec 13 - Sun, Dec 20

5:40 pm - 1:25 pmPHL Philadelphia-SOF Sofia

12h 45m1 stop Frankfurt am Main

6:25 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 40m1 stop Frankfurt am Main

$763Lufthansa

Sun, Dec 13 - Sun, Dec 20

5:40 pm - 1:25 pmPHL Philadelphia-SOF Sofia

12h 45m1 stop Frankfurt am Main

6:45 pm - 4:05 pmSOF Sofia-PHL Philadelphia

52h 20m2 stops Vienna Intl Frankfurt am Main

$778Multiple Airlines

Recent last minute flight deals from Philadelphia to Sofia

Sat, Oct 31 - Mon, Nov 9

6:46 pm - 11:00 pmPHL Philadelphia-SOF Sofia

46h 14m2 stops Chicago O'Hare Intl Frankfurt am Main

7:55 am - 4:05 pmSOF Sofia-PHL Philadelphia

39h 10m2 stops Vienna Intl Frankfurt am Main

$757United Airlines

Sat, Oct 31 - Mon, Nov 9

6:46 pm - 11:00 pmPHL Philadelphia-SOF Sofia

46h 14m2 stops Chicago O'Hare Intl Frankfurt am Main

2:10 pm - 4:05 pmSOF Sofia-PHL Philadelphia

32h 55m1 stop Frankfurt am Main

$762United Airlines

Sun, Nov 1 - Sat, Nov 7

9:45 am - 11:00 pmPHL Philadelphia-SOF Sofia

30h 15m2 stops Chicago O'Hare Intl Frankfurt am Main

2:00 pm - 4:21 pmSOF Sofia-PHL Philadelphia

57h 21m2 stops Munich Franz Josef Strauss Toronto Pearson Intl

$796United Airlines

Sun, Nov 1 - Sat, Nov 7

10:54 am - 11:00 pmPHL Philadelphia-SOF Sofia

29h 06m2 stops Chicago O'Hare Intl Frankfurt am Main

2:10 pm - 4:05 pmSOF Sofia-PHL Philadelphia

32h 55m1 stop Frankfurt am Main

$807United Airlines

Sun, Nov 1 - Sat, Nov 7

5:40 pm - 11:00 pmPHL Philadelphia-SOF Sofia

22h 20m1 stop Frankfurt am Main

2:10 pm - 4:05 pmSOF Sofia-PHL Philadelphia

32h 55m1 stop Frankfurt am Main

$856Lufthansa

Sat, Oct 31 - Mon, Nov 9

7:25 pm - 7:40 pmPHL Philadelphia-SOF Sofia

18h 15m1 stop Zurich

5:15 pm - 4:15 pmSOF Sofia-PHL Philadelphia

30h 00m1 stop London Heathrow

$1,181Multiple Airlines

Sun, Nov 1 - Sat, Nov 7

5:40 pm - 11:55 pmPHL Philadelphia-SOF Sofia

23h 15m2 stops Frankfurt am Main Vienna Intl

11:15 am - 2:50 pmSOF Sofia-PHL Philadelphia

34h 35m3 stops Athens Eleftherios V. Cairo Doha Hamad Intl

$1,291Multiple Airlines

Sun, Nov 1 - Sat, Nov 7

5:40 pm - 1:55 amPHL Philadelphia-SOF Sofia

25h 15m3 stops Frankfurt am Main Brussels Bruxelles-National Nice Côte d'Azur

11:15 am - 2:50 pmSOF Sofia-PHL Philadelphia

34h 35m3 stops Athens Eleftherios V. Cairo Doha Hamad Intl

$1,319Multiple Airlines

Sat, Oct 31 - Mon, Nov 9

9:15 am - 1:25 pmPHL Philadelphia-SOF Sofia

22h 10m2 stops Toronto Pearson Intl Frankfurt am Main

6:00 am - 4:21 pmSOF Sofia-PHL Philadelphia

17h 21m3 stops Munich Franz Josef Strauss Frankfurt am Main Toronto Pearson Intl

$1,376Air Canada

Sat, Oct 31 - Sat, Nov 7

9:45 am - 10:55 pmPHL Philadelphia-SOF Sofia

31h 10m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

7:55 am - 11:25 pmSOF Sofia-PHL Philadelphia

22h 30m2 stops Vienna Intl Washington, D.C. Dulles Intl

$1,940Multiple Airlines

Booking Insights

Price, demand and travel trends for Philadelphia to Sofia flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from Philadelphia to Sofia? This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to Sofia departing in november.
What's the cheapest day of the week to fly from Philadelphia to Sofia?: Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from Philadelphia to Sofia. It’s 33% cheaper than the average day, while Wednesday is the most expensive, with prices 31% higher.
What’s the cheapest month to fly from Philadelphia to Sofia? KAYAK internal proprietary data takes all prices for each month over the last 12 months for round-trip flights from Philadelphia to Sofia, removes the top 0.1% to account for outliers and then takes the median of all values for each month.: •November is the cheapest month to fly from Philadelphia to Sofia at $540 round-trip.
•May ($1,176) and December ($1,110) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 117% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Low season	January
High season	April
Cheapest flight	$361

Beat the crowds with an average 65% drop in travelers.

The most popular month to fly with an average 70% increase in travelers.

One-way flight from Philadelphia to Sofia

When to book flights from Philadelphia to Sofia

Are your dates flexible? Find out the best times to travel from Philadelphia to Sofia based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What cabin classes can I book on flights from Philadelphia to Sofia?
Two cabin classes are available on flights from Philadelphia to Sofia:

• Economy Class
• Business Class
How long is a flight from Philadelphia to Sofia?
A nonstop flight from Philadelphia to Sofia takes 00m, covering 4,800 miles.
Do I need a passport to fly from Philadelphia to Sofia?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How much should I expect to pay for a Philadelphia to Sofia flight?
Round-trip flights from Philadelphia to Sofia range from $546 to $1,033, with an average of $808 over the past 12 months. Anything below $546 counts as a good deal.
Have flight prices from Philadelphia to Sofia changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $690 to $1,962. That means the highest observed fare was about 3x higher than the lowest one.
How are flight prices from Philadelphia to Sofia looking right now?
One-way fares from Philadelphia to Sofia are currently lower than usual. Average one-way flight prices are about $454, which is 20% below the typical average for this route.
What car rental options are available at Sofia Airport (SOF)?
Sofia Airport (SOF) hosts 5 major car rental companies, with daily rates averaging $21 for economy cars. Top options include:

• MEXRENTACAR
• NU Car
• Top Rent a Car - Bulgaria
• Priceless
• Easyrent
Which airports can I use when flying from Philadelphia to Sofia?
Flights from Philadelphia to Sofia usually depart from Philadelphia (PHL) and arrive at Sofia (SOF).
Which airports do connecting flights from Philadelphia to Sofia pass through?
Connecting flights from Philadelphia to Sofia most commonly pass through:

• Frankfurt am Main (FRA) - 99% of one-stop connections
• London Heathrow (LHR) - 1% of one-stop connections
Can I save money by using flexible dates for flights from Philadelphia to Sofia?
Yes. Flexible dates can save you up to 49% on flights from Philadelphia to Sofia. Thursday is the cheapest departure day at $546 round-trip on average, while Wednesday is the most expensive at $1,066, a difference of $520.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
How much time can I save by choosing a different layover airport from Philadelphia to Sofia?
Flying via London Heathrow (LHR) gives the shortest average 1-stop total travel time at 13h 42m, compared with 15h 26m via Frankfurt am Main (FRA).
What is the time difference between Philadelphia and Sofia?
Sofia is 6 hours ahead of Philadelphia (Eastern European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in Sofia?
Some of the most popular sights in Sofia are Vasil Levski National Stadium, National Palace of Culture and Central Sofia Market Hall. These are among the most viewed places in Sofia on KAYAK.

If your dates are flexible, aim for a Thursday departure and avoid flying on Wednesday. On this route, Thursday flights average $546, about $520 less than Wednesday fares (49% savings) based on the last 12 months.
If you can choose when to travel, plan your Philadelphia to Sofia trip for November. Fares historically average $540 round-trip in that month - typically $636 less than the most expensive month, which is May (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to Sofia Airport.

• Hotel Premier Airport Sofia
• ibis Sofia Airport
• Hotel Consul

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PHL - SOF

$361 Find Cheap Flights from Philadelphia to Sofia - Compare and Save

Everything you should know

Cheap Flights from Philadelphia to Sofia (PHL-SOF)

Recent round-trip flight deals from Philadelphia to Sofia

Recent one-way flight deals from Philadelphia to Sofia

Recent last minute flight deals from Philadelphia to Sofia

Price, demand and travel trends for Philadelphia to Sofia flights

How much is a round-trip flight from Philadelphia to Sofia?

What's the cheapest day of the week to fly from Philadelphia to Sofia?

What’s the cheapest month to fly from Philadelphia to Sofia?

Which airline is the cheapest to fly from Philadelphia to Sofia?

What’s the most popular layover airport when flying from Philadelphia to Sofia?

What is the cheapest layover airport when flying from Philadelphia to Sofia?

When flying from Philadelphia to Sofia which airport offers the shortest layover?

Key details for Philadelphia to Sofia flights

Low season

High season

Cheapest flight

When to book flights from Philadelphia to Sofia

Your Philadelphia to Sofia flight questions, answered

Your guide to booking Philadelphia to Sofia flights

More options for your flight from Philadelphia to Sofia

Complete your trip to Sofia with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Philadelphia to Sofia

Find direct flights to and from Philadelphia and Sofia

Flights from domestic origins to Sofia

Flights to other popular destinations

Find deals for your return flight