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 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.

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

Lufthansa is the most popular carrier operating from Philadelphia to Sofia

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.

$327 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.

3:05 pm - 11:15 pmPHL Philadelphia-SOF Sofia

25h 10m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

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

16h 45m1 stop Frankfurt am Main

$737United Airlines

Tue, Sep 8 - Fri, Oct 23

7:40 pm - 11:15 pmPHL Philadelphia-SOF Sofia

20h 35m2 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

$737United Airlines

Mon, Sep 14 - Tue, Oct 20

7:40 pm - 11:15 pmPHL Philadelphia-SOF Sofia

20h 35m2 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

$737Multiple Airlines

Wed, Sep 9 - Tue, Sep 15

7:40 pm - 11:15 pmPHL Philadelphia-SOF Sofia

20h 35m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

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

16h 45m1 stop Frankfurt am Main

$737United Airlines

Sun, Sep 6 - Wed, Sep 16

7:40 pm - 11:15 pmPHL Philadelphia-SOF Sofia

20h 35m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

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

16h 45m1 stop Frankfurt am Main

$737United Airlines

Sun, Sep 13 - Wed, Oct 14

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

22h 00m1 stop Frankfurt am Main

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

16h 55m1 stop Frankfurt am Main

$744Lufthansa

Mon, Sep 7 - Tue, Sep 15

7:00 am - 12:10 pmPHL Philadelphia-SOF Sofia

22h 10m2 stops Toronto Pearson Intl Munich Franz Josef Strauss

6:20 am - 2:47 pmSOF Sofia-PHL Philadelphia

39h 27m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$744Air Canada

Mon, Sep 7 - Wed, Sep 16

5:40 pm - 6:10 pmPHL Philadelphia-SOF Sofia

17h 30m1 stop Frankfurt am Main

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

16h 45m1 stop Frankfurt am Main

$745Multiple Airlines

Sun, Sep 13 - Fri, Oct 23

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

22h 00m1 stop Frankfurt am Main

2:20 pm - 4:05 pmSOF Sofia-PHL Philadelphia

32h 45m1 stop Frankfurt am Main

$762Lufthansa

Mon, Sep 7 - Mon, Sep 14

5:40 pm - 6:10 pmPHL Philadelphia-SOF Sofia

17h 30m1 stop Frankfurt am Main

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

16h 45m1 stop Frankfurt am Main

$765Lufthansa

Sun, Sep 13 - Fri, Oct 23

Cheap last minute flights

Enter your travel dates to find the best prices.

7:40 pm - 11:15 pmPHL Philadelphia-SOF Sofia

20h 35m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

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

16h 45m1 stop Frankfurt am Main

$737United Airlines

Mon, Aug 24 - Wed, Oct 7

10:30 am - 6:40 pmPHL Philadelphia-SOF Sofia

25h 10m2 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

$737United Airlines

Wed, Aug 26 - Tue, Oct 6

7:40 pm - 11:15 pmPHL Philadelphia-SOF Sofia

20h 35m2 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

$737United Airlines

Mon, Aug 24 - Tue, Oct 6

7:40 pm - 11:15 pmPHL Philadelphia-SOF Sofia

20h 35m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:30 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 35m1 stop Frankfurt am Main

$737United Airlines

Mon, Aug 24 - Thu, Oct 8

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

17h 20m1 stop Frankfurt am Main

6:30 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 35m1 stop Frankfurt am Main

$743Lufthansa

Tue, Aug 25 - Thu, Oct 8

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

17h 20m1 stop Frankfurt am Main

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

16h 45m1 stop Frankfurt am Main

$743Lufthansa

Tue, Aug 25 - Wed, Oct 7

5:40 pm - 1:05 pmPHL Philadelphia-SOF Sofia

12h 25m1 stop Frankfurt am Main

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

16h 55m1 stop Frankfurt am Main

$743Lufthansa

Tue, Aug 25 - Tue, Oct 6

10:34 am - 10:20 amPHL Philadelphia-SOF Sofia

40h 46m2 stops Chicago O'Hare Intl Zurich

3:40 pm - 5:54 pmSOF Sofia-PHL Philadelphia

33h 14m2 stops Zurich Chicago O'Hare Intl

$755SWISS

Tue, Aug 25 - Mon, Oct 5

10:34 am - 12:15 pmPHL Philadelphia-SOF Sofia

18h 41m2 stops Chicago O'Hare Intl Zurich

3:40 pm - 5:54 pmSOF Sofia-PHL Philadelphia

33h 14m2 stops Zurich Chicago O'Hare Intl

$755SWISS

Mon, Aug 24 - Mon, Oct 5

3:25 pm - 1:20 pmPHL Philadelphia-SOF Sofia

14h 55m2 stops Montreal Pierre Elliott Trudeau Intl Frankfurt am Main

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

16h 55m1 stop Frankfurt am Main

$797Multiple Airlines

Thu, Aug 27 - Tue, Oct 6

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United Airlines flights from Philadelphia to Sofia

Our best United Airlines deals on Philadelphia to Sofia flight tickets

United Airlines

Sep 9

PHL3:05 pmPhiladelphia

25h 10m

2 stops

SOF11:15 pmSofia

Sep 16

SOF6:20 amSofia

16h 45m

1 stop

PHL4:05 pmPhiladelphia

$737

United Airlines

Aug 24

PHL7:40 pmPhiladelphia

20h 35m

2 stops

SOF11:15 pmSofia

Oct 6

SOF6:10 amSofia

15h 37m

2 stops

PHL2:47 pmPhiladelphia

$740

United Airlines

Sep 9

PHL7:40 pmPhiladelphia

20h 35m

2 stops

SOF11:15 pmSofia

Sep 15

SOF6:10 amSofia

15h 37m

2 stops

PHL2:47 pmPhiladelphia

$741

Lufthansa flights from Philadelphia to Sofia

Our best Lufthansa deals on Philadelphia to Sofia flight tickets

Lufthansa

Aug 25

PHL5:40 pmPhiladelphia

17h 20m

1 stop

SOF6:00 pmSofia

Oct 7

SOF6:20 amSofia

16h 45m

1 stop

PHL4:05 pmPhiladelphia

$743

Lufthansa

Sep 7

PHL5:40 pmPhiladelphia

22h 00m

1 stop

SOF10:40 pmSofia

Sep 15

SOF6:10 amSofia

16h 55m

1 stop

PHL4:05 pmPhiladelphia

$744

Lufthansa

Sep 7

PHL5:40 pmPhiladelphia

22h 00m

1 stop

SOF10:40 pmSofia

Sep 14

SOF2:20 pmSofia

32h 45m

1 stop

PHL4:05 pmPhiladelphia

$762

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 9/8

3:05 pm-11:15 pm

2 stops25h 10m

Sofia

Fri 10/23

6:20 am-4:05 pm

1 stop16h 45m

$737

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/14

7:40 pm-11:15 pm

2 stops20h 35m

Sofia

Tue 10/20

6:10 am-4:05 pm

1 stop16h 55m

$737

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Wed 9/9

7:40 pm-11:15 pm

2 stops20h 35m

Sofia

Tue 9/15

6:10 am-4:05 pm

1 stop16h 55m

$737

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 9/6

7:40 pm-11:15 pm

2 stops20h 35m

Sofia

Wed 9/16

6:20 am-4:05 pm

1 stop16h 45m

$737

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 9/13

7:40 pm-11:15 pm

2 stops20h 35m

Sofia

Wed 10/14

6:20 am-4:05 pm

1 stop16h 45m

$737

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/7

5:40 pm-10:40 pm

1 stop22h 00m

Sofia

Tue 9/15

6:10 am-4:05 pm

1 stop16h 55m

$744

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/7

7:00 am-12:10 pm

2 stops22h 10m

Sofia

Wed 9/16

6:20 am-2:47 pm

2 stops39h 27m

$744

Quickest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 9/13

5:40 pm-6:10 pm

1 stop17h 30m

Sofia

Fri 10/23

6:20 am-4:05 pm

1 stop16h 45m

$745

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 9/7

5:40 pm-10:40 pm

1 stop22h 00m

Sofia

Mon 9/14

2:20 pm-4:05 pm

1 stop32h 45m

$762

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 9/13

5:40 pm-6:10 pm

1 stop17h 30m

Sofia

Fri 10/23

6:20 am-4:05 pm

1 stop16h 45m

$765

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 $602 to $846.
The lowest price recently found on this route was $737.

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	$327
Fastest flight time	17h 50m
Direct flights	None

The best one-way flight to Sofia from Philadelphia in the past 72 hours is $327. The best round-trip flight deal from Philadelphia to Sofia found on momondo in the last 72 hours is $737.

The fastest flight from Philadelphia to Sofia takes 17h 50m

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 17h 50m.
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 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 $497	Free Cancellation	Rating 6.8 8,203 reviews		Search Lufthansa flights
United Airlines	PriceFrom $540	Free Cancellation	Rating 7.4 10,107 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.

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Cheap flights from Philadelphia to Sofia from $327

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 10/11. 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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