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 34% 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 October 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.

$361 Cheap Flights from Philadelphia to Sofia in 2026/27

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.

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

Sun, Nov 29 - Tue, Dec 15

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

Sat, Feb 20 - Fri, Feb 26

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

Sun, Nov 29 - Tue, Dec 15

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

Tue, Apr 20 - Thu, Apr 22

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

Sun, Nov 29 - Tue, Dec 15

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

Tue, Apr 20 - Thu, Apr 22

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

Sun, Dec 13 - Sun, Dec 20

Cheap last minute flights

Enter your travel dates to find the best prices.

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

Sat, Oct 31 - Mon, Nov 9

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

Sun, Nov 1 - Sat, Nov 7

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

Sat, Oct 31 - Mon, Nov 9

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

Sun, Nov 1 - Sat, Nov 7

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 - Mon, Nov 9

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

Sat, Oct 31 - Sat, Nov 7

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Austrian Airlines flights from Philadelphia to Sofia

Our best Austrian Airlines deals on Philadelphia to Sofia flight tickets

Austrian Airlines

Apr 5

PHL9:15 amPhiladelphia

23h 05m

2 stops

SOF3:20 pmSofia

May 17

SOF6:55 pmSofia

28h 05m

2 stops

PHL4:00 pmPhiladelphia

$779

Austrian Airlines

Dec 13

PHL5:40 pmPhiladelphia

23h 15m

2 stops

SOF11:55 pmSofia

Dec 20

SOF7:55 amSofia

15h 10m

2 stops

PHL4:05 pmPhiladelphia

$795

Austrian Airlines

Dec 25

PHL9:15 amPhiladelphia

31h 40m

2 stops

SOF11:55 pmSofia

Jan 9

SOF12:35 pmSofia

34h 30m

2 stops

PHL4:05 pmPhiladelphia

$1,100

Air Canada flights from Philadelphia to Sofia

Our best Air Canada deals on Philadelphia to Sofia flight tickets

Air Canada

Oct 31

PHL9:15 amPhiladelphia

22h 10m

2 stops

SOF1:25 pmSofia

Nov 9

SOF6:00 amSofia

17h 21m

3 stops

PHL4:21 pmPhiladelphia

$1,376

Air Canada

Nov 12

PHL9:15 amPhiladelphia

21h 10m

3 stops

SOF1:25 pmSofia

Nov 30

SOF6:25 amSofia

23h 21m

3 stops

PHL10:46 pmPhiladelphia

$1,414

Air Canada

Dec 25

PHL9:15 amPhiladelphia

21h 10m

3 stops

SOF1:25 pmSofia

Jan 10

SOF6:25 amSofia

23h 21m

2 stops

PHL10:46 pmPhiladelphia

$1,736

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 11/29

5:40 pm-1:25 pm

1 stop12h 45m

Sofia

Tue 12/15

6:25 am-4:05 pm

1 stop16h 40m

$690

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sat 2/20

3:20 pm-2:15 pm

2 stops39h 55m

Sofia

Fri 2/26

6:25 am-4:21 pm

2 stops40h 56m

$707

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 11/29

5:40 pm-10:55 pm

2 stops22h 15m

Sofia

Tue 12/15

6:25 am-4:05 pm

1 stop16h 40m

$715

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 4/20

1:00 pm-12:20 pm

2 stops16h 20m

Sofia

Thu 4/22

6:20 am-4:00 pm

1 stop16h 40m

$723

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 4/20

10:15 am-12:20 pm

2 stops19h 05m

Sofia

Thu 4/22

6:20 am-2:41 pm

2 stops15h 21m

$726

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 11/29

5:40 pm-10:55 pm

2 stops22h 15m

Sofia

Tue 12/15

6:00 am-4:05 pm

2 stops17h 05m

$732

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 4/20

1:00 pm-12:20 pm

2 stops16h 20m

Sofia

Thu 4/22

6:20 am-4:00 pm

1 stop16h 40m

$733

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 4/20

3:20 pm-6:45 pm

2 stops20h 25m

Sofia

Thu 4/22

1:05 pm-2:41 pm

2 stops32h 36m

$736

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 12/13

5:40 pm-1:25 pm

1 stop12h 45m

Sofia

Sun 12/20

6:25 am-4:05 pm

1 stop16h 40m

$763

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 12/13

5:40 pm-1:25 pm

1 stop12h 45m

Sofia

Sun 12/20

6:45 pm-4:05 pm

2 stops52h 20m

$778

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 cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Philadelphia is in March. Flight prices, which tend to average around $546, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of March, then book flights to Sofia from Philadelphia during April instead. Flights to Sofia in April, while not as cheap as those in March, still average around $653.

Can stopping save me money on Philadelphia to Sofia flights?

You could potentially save up to 44% 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	$361
Fastest flight time	12h 45m
Direct flights	None

The best one-way flight to Sofia from Philadelphia in the past 72 hours is $361. The best round-trip flight deal from Philadelphia to Sofia found on momondo in the last 72 hours is $690.

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 October 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 68% of the total bookings. Other popular airlines include United Airlines with 32%.

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
United Airlines	PriceFrom $540	Free Cancellation	Rating 7.3 10,454 reviews		Search United Airlines flights
Lufthansa	PriceFrom $546	Free Cancellation	Rating 6.8 8,297 reviews		Search Lufthansa 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.