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

Lufthansa, British Airways, and United Airlines are the most popular carriers operating from Philadelphia to Sofia

Which airport is the most popular layover for flights between Philadelphia and Sofia?

Frankfurt am Main (FRA) was the most common stop: 97% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Philadelphia to Sofia?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 4h 19m.

Which layover airport has the shortest travel time from Philadelphia to Sofia?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 13h 03m.

Which layover airport offers the lowest fares from Philadelphia to Sofia?

Flights via London (LHR) offer the lowest average round-trip price of $649.

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 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 2025.

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.

$475 Cheap Flights from Philadelphia to Sofia in 2025/26

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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.

3:30 pm - 6:40 pmPHL-SOF

20h 10m2 stops

6:15 am - 4:00 pmSOF-PHL

16h 45m1 stop

$480Multiple Airlines

Find Deal

mar., mar. 31 - mar., abr. 7

3:30 pm - 6:40 pmPHL-SOF

20h 10m2 stops

6:15 am - 4:00 pmSOF-PHL

16h 45m1 stop

$481Multiple Airlines

Find Deal

mar., mar. 31 - mar., abr. 7

3:30 pm - 6:40 pmPHL-SOF

20h 10m2 stops

12:45 pm - 2:46 pmSOF-PHL

33h 01m2 stops

$483Air Canada

Find Deal

mar., mar. 31 - mar., abr. 7

5:35 pm - 1:05 pmPHL-SOF

12h 30m1 stop

6:15 am - 4:00 pmSOF-PHL

16h 45m1 stop

$487Lufthansa

Find Deal

mar., mar. 31 - mar., abr. 7

11:48 am - 10:45 pmPHL-SOF

28h 57m2 stops

6:15 am - 4:00 pmSOF-PHL

16h 45m1 stop

$535United Airlines

Find Deal

mié., mar. 25 - dom., mar. 29

8:05 pm - 10:45 pmPHL-SOF

20h 40m2 stops

6:00 am - 4:00 pmSOF-PHL

17h 00m2 stops

$559United Airlines

Find Deal

mié., mar. 25 - dom., mar. 29

Lufthansa flights from Philadelphia to Sofia

Our best Lufthansa deals on Philadelphia to Sofia flight tickets

Lufthansa

Mar 31

PHL5:35 pmPhiladelphia

12h 30m

1 stop

SOF1:05 pmSofia

Apr 7

SOF6:15 amSofia

16h 45m

1 stop

PHL4:00 pmPhiladelphia

$487

Find similar

Lufthansa

Oct 20

PHL5:35 pmPhiladelphia

17h 15m

1 stop

SOF5:50 pmSofia

Oct 31

SOF6:45 pmSofia

28h 50m

1 stop

PHL5:35 pmPhiladelphia

$703

Find similar

Lufthansa

Oct 21

PHL5:35 pmPhiladelphia

22h 15m

1 stop

SOF10:50 pmSofia

Oct 24

SOF6:15 amSofia

16h 45m

1 stop

PHL4:00 pmPhiladelphia

$1,322

Find similar

Air Canada flights from Philadelphia to Sofia

Our best Air Canada deals on Philadelphia to Sofia flight tickets

Air Canada

Mar 31

PHL3:30 pmPhiladelphia

20h 10m

2 stops

SOF6:40 pmSofia

Apr 7

SOF12:45 pmSofia

33h 01m

2 stops

PHL2:46 pmPhiladelphia

$483

Find similar

Air Canada

Oct 20

PHL3:25 pmPhiladelphia

19h 25m

2 stops

SOF5:50 pmSofia

Oct 31

SOF6:10 amSofia

22h 36m

3 stops

PHL10:46 pmPhiladelphia

$1,902

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mar. 3/31

3:30 pm-6:40 pm

2 stops20h 10m

Sofia

mar. 4/7

6:15 am-4:00 pm

1 stop16h 45m

$480

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mar. 3/31

3:30 pm-6:40 pm

2 stops20h 10m

Sofia

mar. 4/7

6:15 am-4:00 pm

1 stop16h 45m

$481

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mar. 3/31

3:30 pm-6:40 pm

2 stops20h 10m

Sofia

mar. 4/7

12:45 pm-2:46 pm

2 stops33h 01m

$483

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mar. 3/31

5:35 pm-1:05 pm

1 stop12h 30m

Sofia

mar. 4/7

6:15 am-4:00 pm

1 stop16h 45m

$487

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mié. 3/25

11:48 am-10:45 pm

2 stops28h 57m

Sofia

dom. 3/29

6:15 am-4:00 pm

1 stop16h 45m

$535

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

mié. 3/25

8:05 pm-10:45 pm

2 stops20h 40m

Sofia

dom. 3/29

6:00 am-4:00 pm

2 stops17h 00m

$559

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

dom. 11/16

7:00 am-10:45 pm

3 stops32h 45m

$1,584

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

dom. 11/16

5:30 pm-2:15 pm

2 stops13h 45m

$1,990

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

sáb. 11/15

4:52 pm-6:20 pm

3 stops18h 28m

$2,036

PhiladelphiaSofia

PHL - SOF

PHLSOF

Philadelphia

sáb. 11/15

3:30 pm-1:15 pm

2 stops14h 45m

$3,291

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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

Layovers

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Philadelphia is in February. Flight prices, which tend to average around $560, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Sofia from Philadelphia during November instead. Flights to Sofia in November, while not as cheap as those in February, still average around $582.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Tuesday is the cheapest day to fly to Sofia from Philadelphia. The lowest ticket price found for a Tuesday departure recently was $741. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Philadelphia to Sofia on a Saturday will generally be more expensive and average around $1,491. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the evening is the cheapest time of day to fly from Philadelphia to Sofia when you can find flight prices for as low as $838. Flying to Sofia in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,318 per ticket.

Can stopping save me money on Philadelphia to Sofia flights?

You could potentially save up to 8% 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

Direct flights	None

There are no direct flights from Philadelphia to Sofia. There are no popular flight routes from Philadelphia to Sofia.

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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 30m.
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 2025.
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 78% of the total bookings. Other popular airlines include United Airlines with 22%.

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 $544	Free Cancellation	Rating 7.4 8,982 reviews		Search United Airlines flights
Lufthansa	PriceFrom $560	Free Cancellation	Rating 6.8 7,497 reviews		Search Lufthansa flights

Bansko

Borovets

Velingrad

Sandanski

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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 $480

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Sofia departing on 3/31. 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

Air Canada flights from Philadelphia to Sofia

Our best Air Canada deals on Philadelphia to Sofia flight tickets

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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

What is the cheapest month to fly to Sofia?

What is the cheapest day to depart on your flight to Sofia?

What is the cheapest time of day to depart on your flight to Sofia?

Can stopping save me money on Philadelphia to Sofia flights?

You could potentially save up to 8% on your flight if you consider stops on a Philadelphia to Sofia flight.

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

Lufthansa, British Airways, and United Airlines are the most popular carriers operating from Philadelphia to Sofia

What airlines fly to Sofia?

Which airport is the most popular layover for flights between Philadelphia and Sofia?

Frankfurt am Main (FRA) was the most common stop: 97% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Philadelphia to Sofia?

Flights via London (LHR) offer the lowest average round-trip price of $649.

Which layover airport has the shortest travel time from Philadelphia to Sofia?

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 13h 03m.

Which layover airport has the shortest connection time from Philadelphia to Sofia?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 4h 19m.

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

Direct flights

How far is Philadelphia to Sofia by plane?

When did momondo last update prices for flights from Philadelphia Airport to Sofia Airport?

How many operators does momondo search for flights from Philadelphia Airport to Sofia Airport?

How old do you have to be to fly from Philadelphia Airport to Sofia Airport?

What documentation or ID do you need to fly to Sofia Airport?

What is the most popular airline 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?

Why should I use momondo to find a flight deal from Philadelphia to Sofia?

Can I find flights from Philadelphia to Sofia with flexible booking policies on momondo?

How can momondo help me find flights from Philadelphia to Sofia?

I’m not ready to book a flight from Philadelphia to Sofia right now. Can momondo alert me if prices change?

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