What is the cheapest airline that flies from Philadelphia to Sofia?

British Airways and United Airlines are the most popular carriers operating from Philadelphia to Sofia

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 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 September 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.

$329 Cheap Flights from Philadelphia to Sofia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Philadelphia to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:35 pm - 8:10 pmPHL Philadelphia-SOF Sofia

18h 35m1 stop London Heathrow

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

30h 00m1 stop London Heathrow

$544British Airways

Tue, Jan 5 - Mon, Jan 11

6:00 pm - 8:10 pmPHL Philadelphia-SOF Sofia

19h 10m2 stops Boston Logan Intl London Heathrow

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

30h 00m1 stop London Heathrow

$548British Airways

Tue, Jan 5 - Mon, Jan 11

6:00 pm - 8:10 pmPHL Philadelphia-SOF Sofia

19h 10m2 stops Boston Logan Intl London Heathrow

5:15 pm - 7:10 pmSOF Sofia-PHL Philadelphia

32h 55m2 stops London Heathrow Boston Logan Intl

$558British Airways

Tue, Jan 5 - Mon, Jan 11

6:35 pm - 8:10 pmPHL Philadelphia-SOF Sofia

18h 35m1 stop London Heathrow

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

30h 00m1 stop London Heathrow

$561British Airways

Tue, Jan 5 - Mon, Jan 11

6:15 am - 1:15 pmPHL Philadelphia-SOF Sofia

25h 00m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

7:55 am - 11:31 pmSOF Sofia-PHL Philadelphia

22h 36m2 stops Vienna Intl Washington, D.C. Dulles Intl

$598United Airlines

Tue, Oct 27 - Tue, Nov 3

1:20 pm - 1:15 pmPHL Philadelphia-SOF Sofia

17h 55m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

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

16h 40m1 stop Frankfurt am Main

$599United Airlines

Tue, Oct 27 - Tue, Nov 3

6:40 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

$606Lufthansa

Tue, Oct 27 - Tue, Nov 3

10:15 am - 11:50 amPHL Philadelphia-SOF Sofia

18h 35m2 stops Washington, D.C. Dulles Intl Vienna Intl

7:55 am - 1:51 pmSOF Sofia-PHL Philadelphia

36h 56m2 stops Vienna Intl Washington, D.C. Dulles Intl

$612United Airlines

Wed, Jan 6 - Tue, Jan 12

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

$620Lufthansa

Tue, Jan 5 - Tue, Jan 12

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

$620Lufthansa

Tue, Jan 5 - Thu, Jan 14

Cheap last minute flights

Enter your travel dates to find the best prices.

7:40 pm - 12:10 pmPHL Philadelphia-SOF Sofia

33h 30m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:10 am - 9:33 amSOF Sofia-PHL Philadelphia

34h 23m2 stops Munich Franz Josef Strauss Washington, D.C. Dulles Intl

$825United Airlines

Sat, Sep 19 - Sat, Oct 3

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

22h 00m1 stop Frankfurt am Main

4:05 pm - 11:30 pmSOF Sofia-PHL Philadelphia

38h 25m2 stops Vienna Intl Washington, D.C. Dulles Intl

$934Multiple Airlines

Thu, Sep 17 - Sat, Sep 26

7:40 pm - 10:40 pmPHL Philadelphia-SOF Sofia

20h 00m2 stops Washington, D.C. Dulles Intl Frankfurt am Main

4:05 pm - 11:30 pmSOF Sofia-PHL Philadelphia

38h 25m2 stops Vienna Intl Washington, D.C. Dulles Intl

$938Multiple Airlines

Thu, Sep 17 - Sat, Sep 26

5:40 pm - 6:25 pmPHL Philadelphia-SOF Sofia

17h 45m1 stop Frankfurt am Main

7:25 pm - 4:05 pmSOF Sofia-PHL Philadelphia

51h 40m2 stops Munich Franz Josef Strauss Frankfurt am Main

$972Lufthansa

Thu, Sep 17 - Sun, Sep 27

10:05 am - 6:25 pmPHL Philadelphia-SOF Sofia

25h 20m2 stops Montreal Pierre Elliott Trudeau Intl Frankfurt am Main

7:25 pm - 4:05 pmSOF Sofia-PHL Philadelphia

51h 40m2 stops Munich Franz Josef Strauss Frankfurt am Main

$975Multiple Airlines

Thu, Sep 17 - Sun, Sep 27

7:40 pm - 11:40 amPHL Philadelphia-SOF Sofia

33h 00m2 stops Washington, D.C. Dulles Intl Vienna Intl

6:20 am - 6:42 pmSOF Sofia-PHL Philadelphia

19h 22m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

$1,038United Airlines

Sat, Sep 19 - Sat, Oct 3

7:40 pm - 12:10 pmPHL Philadelphia-SOF Sofia

33h 30m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:20 am - 6:42 pmSOF Sofia-PHL Philadelphia

19h 22m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

$1,097United Airlines

Sat, Sep 19 - Sat, Oct 3

7:40 pm - 11:40 amPHL Philadelphia-SOF Sofia

33h 00m2 stops Washington, D.C. Dulles Intl Vienna Intl

1:55 pm - 4:05 pmSOF Sofia-PHL Philadelphia

33h 10m1 stop Frankfurt am Main

$1,254United Airlines

Sat, Sep 19 - Sat, Oct 3

4:20 pm - 12:10 pmPHL Philadelphia-SOF Sofia

36h 50m2 stops Toronto Pearson Intl Munich Franz Josef Strauss

1:55 pm - 4:05 pmSOF Sofia-PHL Philadelphia

33h 10m1 stop Frankfurt am Main

$1,565Lufthansa

Sat, Sep 19 - Sat, Oct 3

4:20 pm - 6:40 pmPHL Philadelphia-SOF Sofia

19h 20m2 stops Toronto Pearson Intl Munich Franz Josef Strauss

1:55 pm - 4:05 pmSOF Sofia-PHL Philadelphia

33h 10m1 stop Frankfurt am Main

$1,625Lufthansa

Sat, Sep 19 - Sat, Oct 3

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United Airlines flights from Philadelphia to Sofia

Our best United Airlines deals on Philadelphia to Sofia flight tickets

United Airlines

Oct 27

PHL6:15 amPhiladelphia

25h 00m

2 stops

SOF1:15 pmSofia

Nov 3

SOF7:55 amSofia

22h 36m

2 stops

PHL11:31 pmPhiladelphia

$598

United Airlines

Oct 27

PHL1:20 pmPhiladelphia

17h 55m

2 stops

SOF1:15 pmSofia

Nov 3

SOF6:25 amSofia

16h 40m

1 stop

PHL4:05 pmPhiladelphia

$599

United Airlines

Jan 6

PHL10:15 amPhiladelphia

18h 35m

2 stops

SOF11:50 amSofia

Jan 12

SOF7:55 amSofia

36h 56m

2 stops

PHL1:51 pmPhiladelphia

$612

Lufthansa flights from Philadelphia to Sofia

Our best Lufthansa deals on Philadelphia to Sofia flight tickets

Lufthansa

Jan 5

PHL5:40 pmPhiladelphia

12h 45m

1 stop

SOF1:25 pmSofia

Jan 13

SOF2:10 pmSofia

32h 55m

1 stop

PHL4:05 pmPhiladelphia

$641

Lufthansa

Jan 6

PHL10:15 amPhiladelphia

20h 10m

2 stops

SOF1:25 pmSofia

Jan 12

SOF6:25 amSofia

16h 40m

1 stop

PHL4:05 pmPhiladelphia

$656

Lufthansa

Jan 5

PHL5:40 pmPhiladelphia

12h 45m

1 stop

SOF1:25 pmSofia

Jan 13

SOF6:25 amSofia

18h 13m

2 stops

PHL5:38 pmPhiladelphia

$661

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 1/5

6:35 pm-8:10 pm

1 stop18h 35m

Sofia

Mon 1/11

5:15 pm-4:15 pm

1 stop30h 00m

$544

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 1/5

6:00 pm-8:10 pm

2 stops19h 10m

Sofia

Mon 1/11

5:15 pm-4:15 pm

1 stop30h 00m

$548

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 1/5

6:00 pm-8:10 pm

2 stops19h 10m

Sofia

Mon 1/11

5:15 pm-7:10 pm

2 stops32h 55m

$558

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 1/5

6:35 pm-8:10 pm

1 stop18h 35m

Sofia

Mon 1/11

5:15 pm-4:15 pm

1 stop30h 00m

$561

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 10/27

6:15 am-1:15 pm

2 stops25h 00m

Sofia

Tue 11/3

7:55 am-11:31 pm

2 stops22h 36m

$598

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 10/27

1:20 pm-1:15 pm

2 stops17h 55m

Sofia

Tue 11/3

6:25 am-4:05 pm

1 stop16h 40m

$599

Quickest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 10/27

6:40 pm-1:25 pm

1 stop12h 45m

Sofia

Tue 11/3

6:25 am-4:05 pm

1 stop16h 40m

$606

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Wed 1/6

10:15 am-11:50 am

2 stops18h 35m

Sofia

Tue 1/12

7:55 am-1:51 pm

2 stops36h 56m

$612

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 1/5

5:40 pm-1:25 pm

1 stop12h 45m

Sofia

Tue 1/12

6:25 am-4:05 pm

1 stop16h 40m

$620

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 1/5

5:40 pm-1:25 pm

1 stop12h 45m

Sofia

Thu 1/14

6:25 am-4:05 pm

1 stop16h 40m

$620

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

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

Prices are currently low for flights on this route.

Typical prices usually range from $752 to $801.
The lowest price recently found on this route was $544.

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 47% 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

Best Price Found	$329
Fastest flight time	12h 45m
Direct flights	None

The best one-way flight to Sofia from Philadelphia in the past 72 hours is $329. The best round-trip flight deal from Philadelphia to Sofia found on momondo in the last 72 hours is $544.

The fastest flight from Philadelphia to Sofia takes 12h 45m

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

Search flight deals

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 12h 45m.
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 September 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 70% of the total bookings. Other popular airlines include United Airlines with 30%.

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 8,219 reviews		Search Lufthansa flights
United Airlines	PriceFrom $540	Free Cancellation	Rating 7.4 10,209 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 $329

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 12/13. 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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United Airlines flights from Philadelphia to Sofia

Our best United Airlines deals on Philadelphia to Sofia flight tickets

Lufthansa flights from Philadelphia to Sofia

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

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

What is the cheapest month to fly to Sofia?

Can stopping save me money on Philadelphia to Sofia flights?

What is the cheapest airline that flies from Philadelphia to Sofia?

What airlines fly to Sofia?

When to book flights from Philadelphia to Sofia

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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?

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

Cabin classes currently available on flights to Sofia

List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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