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

British Airways, Air Canada, and SWISS are the most popular carriers operating from Philadelphia to Sofia

What airlines fly to Sofia?

Lufthansa, Turkish Airlines and United 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 38% 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 August 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.

$337 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

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:35 pm - 4:20 pmPHL Philadelphia-SOF Sofia

14h 45m1 stop London Heathrow

9:05 pm - 4:15 pmSOF Sofia-PHL Philadelphia

26h 10m1 stop London Heathrow

$740British Airways

Sun, Dec 6 - Wed, Dec 9

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

20h 00m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

2:00 pm - 2:44 pmSOF Sofia-PHL Philadelphia

31h 44m2 stops Munich Franz Josef Strauss Montreal Pierre Elliott Trudeau Intl

$745Air Canada

Sun, Dec 6 - Wed, Dec 9

3:08 pm - 12:10 pmPHL Philadelphia-SOF Sofia

14h 02m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:10 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 55m1 stop Frankfurt am Main

$767United Airlines

Mon, Sep 28 - Tue, Oct 20

6:15 am - 12:10 pmPHL Philadelphia-SOF Sofia

22h 55m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:10 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 55m1 stop Frankfurt am Main

$767United Airlines

Mon, Sep 28 - Tue, Oct 20

3:08 pm - 12:10 pmPHL Philadelphia-SOF Sofia

14h 02m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:10 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 55m1 stop Frankfurt am Main

$767Multiple Airlines

Mon, Sep 28 - Tue, Oct 20

10:40 am - 12:10 pmPHL Philadelphia-SOF Sofia

18h 30m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:10 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 55m1 stop Frankfurt am Main

$767United Airlines

Mon, Sep 28 - Tue, Oct 20

4:20 pm - 10:50 pmPHL Philadelphia-SOF Sofia

23h 30m2 stops Toronto Pearson Intl Frankfurt am Main

6:20 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 45m1 stop Frankfurt am Main

$770Multiple Airlines

Wed, Sep 23 - Wed, Sep 30

5:40 pm - 6:00 pmPHL Philadelphia-SOF Sofia

17h 20m1 stop Frankfurt am Main

6:10 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 55m1 stop Frankfurt am Main

$772Lufthansa

Mon, Sep 28 - Tue, Oct 20

5:40 pm - 6:00 pmPHL Philadelphia-SOF Sofia

17h 20m1 stop Frankfurt am Main

6:10 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 55m1 stop Frankfurt am Main

$773Lufthansa

Mon, Sep 28 - Tue, Oct 20

5:40 pm - 1:20 pmPHL Philadelphia-SOF Sofia

12h 40m1 stop Frankfurt am Main

7:00 pm - 5:05 pmSOF Sofia-PHL Philadelphia

28h 05m1 stop Frankfurt am Main

$826Lufthansa

Thu, Oct 15 - Sat, Oct 31

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British Airways flights from Philadelphia to Sofia

Our best British Airways deals on Philadelphia to Sofia flight tickets

British Airways

Dec 6

PHL6:35 pmPhiladelphia

14h 45m

1 stop

SOF4:20 pmSofia

Dec 9

SOF9:05 pmSofia

26h 10m

1 stop

PHL4:15 pmPhiladelphia

$740

British Airways

Oct 15

PHL6:45 pmPhiladelphia

11h 40m

1 stop

SOF1:25 pmSofia

Oct 30

SOF8:30 pmSofia

26h 45m

1 stop

PHL5:15 pmPhiladelphia

$963

British Airways

Dec 22

PHL6:35 pmPhiladelphia

18h 35m

1 stop

SOF8:10 pmSofia

Dec 28

SOF5:15 pmSofia

49h 11m

2 stops

PHL11:26 amPhiladelphia

$987

United Airlines flights from Philadelphia to Sofia

Our best United Airlines deals on Philadelphia to Sofia flight tickets

United Airlines

Sep 28

PHL6:15 amPhiladelphia

22h 55m

2 stops

SOF12:10 pmSofia

Oct 20

SOF6:10 amSofia

16h 55m

1 stop

PHL4:05 pmPhiladelphia

$767

United Airlines

Sep 28

PHL5:40 pmPhiladelphia

12h 45m

1 stop

SOF1:25 pmSofia

Oct 20

SOF6:10 amSofia

16h 55m

1 stop

PHL4:05 pmPhiladelphia

$775

United Airlines

Sep 28

PHL9:34 amPhiladelphia

19h 36m

2 stops

SOF12:10 pmSofia

Oct 20

SOF6:10 amSofia

22h 19m

2 stops

PHL9:29 pmPhiladelphia

$777

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 12/6

6:35 pm-4:20 pm

1 stop14h 45m

Sofia

Wed 12/9

9:05 pm-4:15 pm

1 stop26h 10m

$740

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 12/6

3:20 pm-6:20 pm

2 stops20h 00m

Sofia

Wed 12/9

2:00 pm-2:44 pm

2 stops31h 44m

$745

Quickest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/28

3:08 pm-12:10 pm

2 stops14h 02m

Sofia

Tue 10/20

6:10 am-4:05 pm

1 stop16h 55m

$767

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/28

6:15 am-12:10 pm

2 stops22h 55m

Sofia

Tue 10/20

6:10 am-4:05 pm

1 stop16h 55m

$767

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/28

3:08 pm-12:10 pm

2 stops14h 02m

Sofia

Tue 10/20

6:10 am-4:05 pm

1 stop16h 55m

$767

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/28

10:40 am-12:10 pm

2 stops18h 30m

Sofia

Tue 10/20

6:10 am-4:05 pm

1 stop16h 55m

$767

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Wed 9/23

4:20 pm-10:50 pm

2 stops23h 30m

Sofia

Wed 9/30

6:20 am-4:05 pm

1 stop16h 45m

$770

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/28

5:40 pm-6:00 pm

1 stop17h 20m

Sofia

Tue 10/20

6:10 am-4:05 pm

1 stop16h 55m

$772

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/28

5:40 pm-6:00 pm

1 stop17h 20m

Sofia

Tue 10/20

6:10 am-4:05 pm

1 stop16h 55m

$773

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Thu 10/15

5:40 pm-1:20 pm

1 stop12h 40m

Sofia

Sat 10/31

7:00 pm-5:05 pm

1 stop28h 05m

$826

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 typical for flights on this route.

Typical prices usually range from $574 to $994.
The lowest price recently found on this route was $740.

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

Fastest flight time	12h 55m
Direct flights	None

The fastest flight from Philadelphia to Sofia takes 12h 55m

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 55m.
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 August 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 71% of the total bookings. Other popular airlines include United Airlines with 29%.

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 $497	Free Cancellation	Rating 6.8 8,174 reviews		Search Lufthansa flights
United Airlines	PriceFrom $540	Free Cancellation	Rating 7.4 10,096 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.