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Sofia

$225+ Cheap flights from Pennsylvania to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SOF
Dec 20 — Dec 271
Sat 12/20
Sat 12/27
1 adult, Economy
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Find flight deals from Pennsylvania to Sofia

Cheapest flights from Pennsylvania to Sofia
Explore the most affordable flight options available from Pennsylvania to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2025.

This FlightHub deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:55 pmEWR - SOF
1 stop10h 55mAustrian Airlines
Tue 12/26:45 pmSOF - EWR
1 stop26h 30mAustrian Airlines
Deal found 11/19$394
This United Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:55 pmEWR - SOF
1 stop10h 55mUnited Airlines
Tue 12/22:00 pmSOF - EWR
2 stops35h 59mUnited Airlines
Deal found 11/19$418
This Cheapflightsfares deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:55 pmEWR - SOF
1 stop10h 55mMultiple Airlines
Fri 12/126:05 amSOF - EWR
2 stops14h 55mMultiple Airlines
Deal found 11/19$422
This United Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:25 pmJFK - SOF
2 stops16h 55mUnited Airlines
Tue 12/166:00 amSOF - JFK
2 stops21h 58mUnited Airlines
Deal found 11/19$428
This Austrian Airlines deal was found by Cheapflights users on 11/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:35 pmEWR - SOF
2 stops23h 20mAustrian Airlines
Tue 12/96:45 pmSOF - EWR
1 stop26h 30mAustrian Airlines
Deal found 11/17$429
This Travelocity deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/13:30 pmEWR - SOF
2 stops14h 45mMultiple Airlines
Mon 12/157:05 pmSOF - EWR
2 stops23h 15mMultiple Airlines
Deal found 11/19$434
This Kiwi.com deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:30 pmJFK - SOF
1 stop12h 45mMultiple Airlines
Mon 12/156:45 pmSOF - JFK
1 stop26h 30mMultiple Airlines
Deal found 11/19$438
This United Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:25 pmJFK - SOF
2 stops16h 55mUnited Airlines
Mon 12/151:45 pmSOF - JFK
2 stops30h 20mUnited Airlines
Deal found 11/19$439
This Justfly.com deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:55 pmJFK - SOF
2 stops14h 20mMultiple Airlines
Tue 12/22:00 pmSOF - JFK
2 stops30h 05mMultiple Airlines
Deal found 11/19$441
This oojo deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:55 pmEWR - SOF
1 stop17h 05mAustrian Airlines
Thu 12/257:55 amSOF - EWR
1 stop13h 20mAustrian Airlines
Deal found 11/19$444
This oojo deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:10 pmJFK - SOF
1 stop10h 40mAustrian Airlines
Thu 12/257:55 amSOF - JFK
1 stop13h 20mAustrian Airlines
Deal found 11/19$444
This Cheapflightsfares deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:35 pmEWR - SOF
2 stops12h 40mLufthansa
Fri 12/126:05 amSOF - EWR
2 stops14h 55mLufthansa
Deal found 11/19$445

Cheap flight deals from Pennsylvania to Sofia

Keep the following information in mind while searching for Pennsylvania to Sofia flight deals. Data was last updated November 20, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$351
(Kiwi.com)

One-way from

$225
(Kiwi.com)

Popular in

May

Cheapest in

October

Average price

$540
Provider with most accurate pricing for Philadelphia-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Sofia flights.
Search Deals
From Pennsylvania to Sofia
Search Deals
One-way flight from Pennsylvania to Sofia
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($277 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pennsylvania to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 20, 2025.
Use the filters below to find and compare flights from Pennsylvania to Sofia that are best for you.

Fly from

Pennsylvania

Fly to

Sofia

Route

Depart

Return

Price

NewarkSofia

EWR - SOF

EWRSOF

Newark

Wed 2/4

8:50 pm-10:45 pm

1 stop18h 55m

Sofia

Wed 2/18

6:45 pm-1:55 pm

1 stop26h 10m

$390

NewarkSofia

EWR - SOF

EWRSOF

Newark

Wed 1/14

6:00 pm-11:55 pm

2 stops22h 55m

Sofia

Mon 1/19

6:45 pm-1:55 pm

1 stop26h 10m

$417

NewarkSofia

EWR - SOF

EWRSOF

Newark

Wed 11/26

5:55 pm-11:50 am

1 stop10h 55m

Sofia

Tue 12/2

2:00 pm-6:59 pm

2 stops35h 59m

$418

New YorkSofia

LGA - SOF

LGASOF

New York LaGuardia

Wed 3/11

6:05 am-6:20 pm

2 stops30h 15m

Sofia

Sat 3/28

7:55 am-7:02 pm

2 stops17h 07m

$423

NewarkSofia

EWR - SOF

EWRSOF

Newark

Sun 1/11

6:00 am-11:50 am

2 stops22h 50m

Sofia

Mon 1/26

2:20 pm-2:00 pm

1 stop30h 40m

$425

New YorkSofia

LGA - SOF

LGASOF

New York LaGuardia

Sun 1/11

7:29 pm-1:15 pm

2 stops34h 46m

Sofia

Mon 1/26

2:20 pm-4:57 pm

2 stops33h 37m

$426

New YorkSofia

LGA - SOF

LGASOF

New York LaGuardia

Mon 1/12

5:35 pm-1:15 pm

2 stops12h 40m

Sofia

Mon 1/26

1:45 pm-9:32 pm

2 stops14h 47m

$435

NewarkSofia

EWR - SOF

EWRSOF

Newark

Wed 1/28

5:55 pm-11:50 am

1 stop10h 55m

Sofia

Sun 2/1

6:45 pm-11:55 am

2 stops48h 10m

$435

New YorkSofia

JFK - SOF

JFKSOF

New York John F Kennedy Intl

Mon 12/1

6:25 pm-6:20 pm

2 stops16h 55m

Sofia

Mon 12/15

1:45 pm-1:05 pm

2 stops30h 20m

$439

NewarkSofia

EWR - SOF

EWRSOF

Newark

Wed 2/18

6:00 pm-6:00 pm

2 stops17h 00m

Sofia

Wed 3/4

6:45 pm-1:55 pm

2 stops26h 10m

$443

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 60 results
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Best time to book a flight from Pennsylvania to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Pennsylvania with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Pennsylvania to Sofia

What is the cheapest month to book a flight from Pennsylvania to Sofia?

Currently, October is the cheapest month in which you can book a flight from Pennsylvania to Sofia (average of $476). Flying from Pennsylvania to Sofia in May is currently the most expensive (average of $739). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PA to SOF?

Find hourly flight availability from Pennsylvania to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2025.

It’s typically best to fly out from Pennsylvania to Sofia in the evening. Doing so could potentially save you 48% on the flight price compared to flying in the morning, which is usually more expensive.

Related info for your journey

Find useful and relevant information for your journey from Pennsylvania to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Pennsylvania?

    Most people fly into Sofia (SOF) if they book a flight to Sofia from Pennsylvania. Sofia is conveniently located just 4.2 mi from Sofia’s city center.

  • How long is the flight from Pennsylvania to Sofia?

    Airlines like Austrian Airlines, United Airlines, and Air Canada fly from Pennsylvania to Sofia in about 10h 55m. The time it takes to get you to your destination can typically vary by up to 12h. The distance between Pennsylvania and Sofia is about 4721 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Pennsylvania to Sofia one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as $378. Users have also found prices from $405 and $469 on United Airlines and Turkish Airlines, respectively.

  • What are the most popular routes from Pennsylvania to Sofia?

    While some choose either Newark - Sofia or New York LaGuardia - Sofia, New York John F Kennedy Intl - Sofia is the most popular route from Pennsylvania to Sofia.

  • Can I find deals for flights from Pennsylvania to Sofia that include hotel bookings?

    Yes. In addition to deals on Pennsylvania to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pennsylvania to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pennsylvania to Sofia.

  • Can I find deals for business class flights from Pennsylvania to Sofia?

    Yes. Cheapflights offers flight deals from Pennsylvania to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Pennsylvania to Sofia?

    Currently, October is the cheapest month in which you can book a flight from Pennsylvania to Sofia (average of $476). Flying from Pennsylvania to Sofia in May is currently the most expensive (average of $739). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Pennsylvania to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Pennsylvania to Sofia

Discover the top 4 airlines that operate flights from Pennsylvania to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$511Average$832FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$544Average$1,027FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$626Average$713FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$802Average$1,239FlexibilityNo cancel feeOn-time77%

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