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

Air France, Lufthansa, and United Airlines are the most popular carriers operating from Philadelphia to Sofia

What airlines fly to Sofia?

United Airlines, Lufthansa and Turkish Airlines are the top three most popular airlines that fly to Sofia from Philadelphia according to our data. United Airlines is the first choice among our users, with 35% 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 June 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.

$341 Cheap Flights from Philadelphia to Sofia in 2026

Q: 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 $1,173 to $837. The lowest price recently found on this route was $718.

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.

7:45 pm - 6:40 pm

PHL

SOF

15h 55m

2 stops

6:10 am - 12:59 am

SOF

PHL

25h 49m

2 stops

$718United Airlines

Tue, Aug 4 - Thu, Aug 20

7:45 pm - 6:40 pm

PHL

SOF

15h 55m

2 stops

6:10 am - 12:59 am

SOF

PHL

25h 49m

2 stops

$719United Airlines

Tue, Aug 4 - Thu, Aug 20

10:05 am - 6:40 pm

PHL

SOF

25h 35m

2 stops

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$736Multiple Airlines

Sun, Sep 6 - Fri, Sep 18

3:05 pm - 12:10 pm

PHL

SOF

14h 05m

2 stops

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$738United Airlines

Mon, Sep 7 - Fri, Sep 18

10:05 am - 6:40 pm

PHL

SOF

25h 35m

2 stops

6:20 am - 9:32 pm

SOF

PHL

22h 12m

2 stops

$740Air Canada

Sun, Sep 6 - Fri, Sep 18

5:40 pm - 1:05 pm

PHL

SOF

12h 25m

1 stop

6:10 am - 4:05 pm

SOF

PHL

16h 55m

1 stop

$741Lufthansa

Tue, Sep 1 - Tue, Sep 15

4:20 pm - 6:40 pm

PHL

SOF

43h 20m

2 stops

6:30 am - 2:47 pm

SOF

PHL

39h 17m

2 stops

$744Air Canada

Sat, Sep 5 - Thu, Sep 17

5:40 pm - 6:10 pm

PHL

SOF

17h 30m

1 stop

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$745Lufthansa

Sun, Sep 6 - Fri, Sep 18

4:20 pm - 6:40 pm

PHL

SOF

43h 20m

2 stops

6:20 am - 10:46 pm

SOF

PHL

23h 26m

2 stops

$749Air Canada

Sat, Sep 5 - Fri, Sep 18

3:25 pm - 6:10 pm

PHL

SOF

43h 45m

2 stops

6:20 am - 4:05 pm

SOF

PHL

16h 45m

1 stop

$754Lufthansa

Sat, Sep 5 - Fri, Sep 18

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Air Canada flights from Philadelphia to Sofia

Our best Air Canada deals on Philadelphia to Sofia flight tickets

Air Canada

Sep 6

PHL10:05 amPhiladelphia

25h 35m

2 stops

SOF6:40 pmSofia

Sep 18

SOF6:20 amSofia

22h 12m

2 stops

PHL9:32 pmPhiladelphia

$740

Air Canada

Sep 5

PHL4:20 pmPhiladelphia

43h 20m

2 stops

SOF6:40 pmSofia

Sep 17

SOF6:30 amSofia

39h 17m

2 stops

PHL2:47 pmPhiladelphia

$744

Air Canada

Sep 5

PHL4:20 pmPhiladelphia

43h 20m

2 stops

SOF6:40 pmSofia

Sep 18

SOF6:20 amSofia

23h 26m

2 stops

PHL10:46 pmPhiladelphia

$749

Lufthansa flights from Philadelphia to Sofia

Our best Lufthansa deals on Philadelphia to Sofia flight tickets

Lufthansa

Sep 1

PHL5:40 pmPhiladelphia

12h 25m

1 stop

SOF1:05 pmSofia

Sep 15

SOF6:10 amSofia

16h 55m

1 stop

PHL4:05 pmPhiladelphia

$741

Lufthansa

Sep 6

PHL5:40 pmPhiladelphia

17h 30m

1 stop

SOF6:10 pmSofia

Sep 18

SOF6:20 amSofia

16h 45m

1 stop

PHL4:05 pmPhiladelphia

$745

Lufthansa

Sep 5

PHL3:25 pmPhiladelphia

43h 45m

2 stops

SOF6:10 pmSofia

Sep 18

SOF6:20 amSofia

16h 45m

1 stop

PHL4:05 pmPhiladelphia

$754

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

7:45 pm-6:40 pm

2 stops15h 55m

Sofia

Thu 8/20

6:10 am-12:59 am

2 stops25h 49m

$718

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 8/4

7:45 pm-6:40 pm

2 stops15h 55m

Sofia

Thu 8/20

6:10 am-12:59 am

2 stops25h 49m

$719

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 9/6

10:05 am-6:40 pm

2 stops25h 35m

Sofia

Fri 9/18

6:20 am-4:05 pm

1 stop16h 45m

$736

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Mon 9/7

3:05 pm-12:10 pm

2 stops14h 05m

Sofia

Fri 9/18

6:20 am-4:05 pm

1 stop16h 45m

$738

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 9/6

10:05 am-6:40 pm

2 stops25h 35m

Sofia

Fri 9/18

6:20 am-9:32 pm

2 stops22h 12m

$740

Quickest round-trip

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Tue 9/1

5:40 pm-1:05 pm

1 stop12h 25m

Sofia

Tue 9/15

6:10 am-4:05 pm

1 stop16h 55m

$741

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sat 9/5

4:20 pm-6:40 pm

2 stops43h 20m

Sofia

Thu 9/17

6:30 am-2:47 pm

2 stops39h 17m

$744

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sun 9/6

5:40 pm-6:10 pm

1 stop17h 30m

Sofia

Fri 9/18

6:20 am-4:05 pm

1 stop16h 45m

$745

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sat 9/5

4:20 pm-6:40 pm

2 stops43h 20m

Sofia

Fri 9/18

6:20 am-10:46 pm

2 stops23h 26m

$749

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

Sat 9/5

3:25 pm-6:10 pm

2 stops43h 45m

Sofia

Fri 9/18

6:20 am-4:05 pm

1 stop16h 45m

$754

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?

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Philadelphia is in April. Flight prices, which tend to average around $514, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Sofia from Philadelphia during October instead. Flights to Sofia in October, while not as cheap as those in April, still average around $518.

Can stopping save me money on Philadelphia to Sofia flights?

You could potentially save up to 46% 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	15h 38m
Direct flights	None

The fastest flight from Philadelphia to Sofia takes 15h 38m

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 15h 38m.
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 June 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 $497	Free Cancellation	Rating 6.8 8,052 reviews		Search Lufthansa flights
United Airlines	PriceFrom $540	Free Cancellation	Rating 7.4 9,805 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 $341

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 8/18. 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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Air Canada flights from Philadelphia to Sofia

Our best Air Canada 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

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Sofia

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

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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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