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?

British Airways, Lufthansa, and United Airlines are the most popular carriers 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 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.

$328 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.

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

$555British Airways

Tue, Nov 3 - Mon, Nov 9

6:45 pm - 8:30 pmPHL Philadelphia-SOF Sofia

18h 45m1 stop London Heathrow

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

26h 10m1 stop London Heathrow

$555British Airways

Tue, Oct 20 - Wed, Dec 2

7:35 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

$555British Airways

Sun, Oct 25 - Wed, Dec 2

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

18h 35m1 stop London Heathrow

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

26h 10m1 stop London Heathrow

$555British Airways

Tue, Nov 3 - Wed, Nov 11

6:15 am - 10:55 pmPHL Philadelphia-SOF Sofia

34h 40m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

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

16h 40m1 stop Frankfurt am Main

$598United Airlines

Tue, Oct 27 - Tue, Nov 17

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

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

6:00 am - 10:56 pmSOF Sofia-PHL Philadelphia

23h 56m2 stops Munich Franz Josef Strauss Toronto Pearson Intl

$602United Airlines

Mon, Oct 19 - Fri, Dec 4

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

17h 30m1 stop Frankfurt am Main

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

16h 40m1 stop Frankfurt am Main

$607Lufthansa

Tue, Oct 27 - Tue, Nov 17

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

$612Lufthansa

Wed, Oct 21 - Thu, Dec 3

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

22h 00m1 stop Frankfurt am Main

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

16h 40m1 stop Frankfurt am Main

$615United Airlines

Mon, Oct 19 - Thu, Dec 3

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

17h 30m1 stop Frankfurt am Main

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

16h 40m1 stop Frankfurt am Main

$620Lufthansa

Sun, Oct 25 - Thu, Dec 3

Cheap last minute flights

Enter your travel dates to find the best prices.

6:10 am - 11:15 pmPHL Philadelphia-SOF Sofia

34h 05m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

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

16h 35m1 stop Frankfurt am Main

$931United Airlines

Fri, Sep 25 - Thu, Oct 1

6:10 am - 11:15 pmPHL Philadelphia-SOF Sofia

34h 05m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:30 am - 9:43 amSOF Sofia-PHL Philadelphia

34h 13m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

$941United Airlines

Fri, Sep 25 - Thu, Oct 1

5:40 pm - 10:30 pmPHL Philadelphia-SOF Sofia

21h 50m1 stop Frankfurt am Main

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

16h 35m1 stop Frankfurt am Main

$994Lufthansa

Fri, Sep 25 - Thu, Oct 1

5:40 pm - 11:15 pmPHL Philadelphia-SOF Sofia

22h 35m2 stops Frankfurt am Main Munich Franz Josef Strauss

5:00 am - 4:05 pmSOF Sofia-PHL Philadelphia

18h 05m3 stops Belgrade Nikola Tesla Munich Franz Josef Strauss Frankfurt am Main

$1,310Multiple Airlines

Fri, Sep 25 - Thu, Oct 1

4:20 pm - 2:30 pmPHL Philadelphia-SOF Sofia

15h 10m1 stop Madrid Barajas

7:00 am - 4:10 pmSOF Sofia-PHL Philadelphia

16h 10m1 stop Paris Charles de Gaulle

$1,361Multiple Airlines

Tue, Sep 22 - Thu, Sep 24

5:40 pm - 11:40 amPHL Philadelphia-SOF Sofia

35h 00m3 stops Frankfurt am Main Munich Franz Josef Strauss Vienna Intl

5:00 am - 4:05 pmSOF Sofia-PHL Philadelphia

18h 05m3 stops Belgrade Nikola Tesla Munich Franz Josef Strauss Frankfurt am Main

$1,364Multiple Airlines

Fri, Sep 25 - Thu, Oct 1

3:25 pm - 6:40 pmPHL Philadelphia-SOF Sofia

20h 15m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

6:30 am - 2:47 pmSOF Sofia-PHL Philadelphia

15h 17m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$1,384Air Canada

Tue, Sep 22 - Thu, Sep 24

3:25 pm - 6:40 pmPHL Philadelphia-SOF Sofia

20h 15m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

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

16h 35m1 stop Frankfurt am Main

$1,403Multiple Airlines

Tue, Sep 22 - Thu, Sep 24

8:25 pm - 1:25 amPHL Philadelphia-SOF Sofia

22h 00m2 stops Dublin Madrid Barajas

10:45 am - 2:30 pmSOF Sofia-PHL Philadelphia

34h 45m3 stops Athens Eleftherios V. Larnaca Doha Hamad Intl

$1,637Multiple Airlines

Tue, Sep 22 - Thu, Sep 24

10:50 am - 2:30 pmPHL Philadelphia-SOF Sofia

20h 40m3 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl Madrid Barajas

3:50 pm - 2:30 pmSOF Sofia-PHL Philadelphia

29h 40m3 stops Istanbul Cairo Doha Hamad Intl

$1,707Multiple Airlines

Tue, Sep 22 - Thu, Sep 24

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Lufthansa flights from Philadelphia to Sofia

Our best Lufthansa deals on Philadelphia to Sofia flight tickets

Lufthansa

Oct 27

PHL6:40 pmPhiladelphia

17h 30m

1 stop

SOF6:10 pmSofia

Nov 17

SOF6:25 amSofia

16h 40m

1 stop

PHL4:05 pmPhiladelphia

$607

Lufthansa

Oct 25

PHL6:40 pmPhiladelphia

17h 30m

1 stop

SOF6:10 pmSofia

Dec 3

SOF6:25 amSofia

16h 40m

1 stop

PHL4:05 pmPhiladelphia

$620

Lufthansa

Nov 1

PHL5:40 pmPhiladelphia

17h 30m

1 stop

SOF6:10 pmSofia

Nov 10

SOF6:00 amSofia

17h 05m

2 stops

PHL4:05 pmPhiladelphia

$629

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

34h 40m

2 stops

SOF10:55 pmSofia

Nov 17

SOF6:25 amSofia

16h 40m

1 stop

PHL4:05 pmPhiladelphia

$598

United Airlines

Oct 19

PHL7:00 amPhiladelphia

22h 10m

2 stops

SOF12:10 pmSofia

Dec 4

SOF6:00 amSofia

23h 56m

2 stops

PHL10:56 pmPhiladelphia

$602

United Airlines

Oct 19

PHL5:40 pmPhiladelphia

22h 00m

1 stop

SOF10:40 pmSofia

Dec 3

SOF6:25 amSofia

16h 40m

1 stop

PHL4:05 pmPhiladelphia

$615

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 11/3

6:35 pm-8:10 pm

1 stop18h 35m

Sofia

Mon 11/9

5:15 pm-4:15 pm

1 stop30h 00m

$555

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 10/20

6:45 pm-8:30 pm

1 stop18h 45m

Sofia

Wed 12/2

9:05 pm-4:15 pm

1 stop26h 10m

$555

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 10/25

7:35 pm-4:20 pm

1 stop14h 45m

Sofia

Wed 12/2

9:05 pm-4:15 pm

1 stop26h 10m

$555

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 11/3

6:35 pm-8:10 pm

1 stop18h 35m

Sofia

Wed 11/11

9:05 pm-4:15 pm

1 stop26h 10m

$555

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 10/27

6:15 am-10:55 pm

2 stops34h 40m

Sofia

Tue 11/17

6:25 am-4:05 pm

1 stop16h 40m

$598

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 10/19

7:00 am-12:10 pm

2 stops22h 10m

Sofia

Fri 12/4

6:00 am-10:56 pm

2 stops23h 56m

$602

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Tue 10/27

6:40 pm-6:10 pm

1 stop17h 30m

Sofia

Tue 11/17

6:25 am-4:05 pm

1 stop16h 40m

$607

Quickest round-trip

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Wed 10/21

5:40 pm-1:25 pm

1 stop12h 45m

Sofia

Thu 12/3

6:25 am-4:05 pm

1 stop16h 40m

$612

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Mon 10/19

5:40 pm-10:40 pm

1 stop22h 00m

Sofia

Thu 12/3

6:25 am-4:05 pm

1 stop16h 40m

$615

PhiladelphiaSofia

PHL Philadelphia - SOF Sofia

PHLSOF

Philadelphia

Sun 10/25

6:40 pm-6:10 pm

1 stop17h 30m

Sofia

Thu 12/3

6:25 am-4:05 pm

1 stop16h 40m

$620

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 low for flights on this route.

Typical prices usually range from $634 to $806.
The lowest price recently found on this route was $555.

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 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	$328
Fastest flight time	20h 45m
Direct flights	None

The best one-way flight to Sofia from Philadelphia in the past 72 hours is $328. The best round-trip flight deal from Philadelphia to Sofia found on momondo in the last 72 hours is $555.

The fastest flight from Philadelphia to Sofia takes 20h 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 20h 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 69% of the total bookings. Other popular airlines include United Airlines with 31%.

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 8,236 reviews		Search Lufthansa flights
United Airlines	PriceFrom $540	Free Cancellation	Rating 7.4 10,231 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 $328

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 10/20. 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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Lufthansa flights from Philadelphia to Sofia

Our best Lufthansa deals on Philadelphia to Sofia flight tickets

United Airlines flights from Philadelphia to Sofia

Our best United Airlines 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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