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$315+ Cheap flights from Sofia (SOF) to Pennsylvania

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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — PHL
Jan 24 — Jan 311
Sat 1/24
Sat 1/31
1 adult, Economy
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Cheap flight deals from Sofia to Pennsylvania

Cheapest flights from Sofia to Pennsylvania
Explore the most affordable flight options available from Sofia to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 25, 2025.

This KLM deal was found by Cheapflights users on 12/23. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Wed 1/286:50 pmIAD - SOF
1 stop12h 15mMultiple Airlines
Deal found 12/23$715
This KLM deal was found by Cheapflights users on 12/24. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amSOF - IAD
1 stop16h 05mMultiple Airlines
Wed 1/286:50 pmIAD - SOF
1 stop12h 15mMultiple Airlines
Deal found 12/24$716
This KLM deal was found by Cheapflights users on 12/23. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:00 amSOF - IAD
1 stop16h 05mKLM
Wed 1/282:15 pmIAD - SOF
2 stops16h 50mKLM
Deal found 12/23$725
This KLM deal was found by Cheapflights users on 12/24. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amSOF - IAD
1 stop16h 05mKLM
Wed 1/282:15 pmIAD - SOF
2 stops16h 50mKLM
Deal found 12/24$726
This Air France deal was found by Cheapflights users on 12/23. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:10 amSOF - IAD
1 stop16h 25mMultiple Airlines
Wed 1/282:15 pmIAD - SOF
2 stops16h 50mMultiple Airlines
Deal found 12/23$735
This United Airlines deal was found by Cheapflights users on 12/23. 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 12/246:10 amSOF - IAD
1 stop21h 05mUnited Airlines
Sat 1/245:40 pmIAD - SOF
1 stop17h 40mUnited Airlines
Deal found 12/23$747
This United Airlines deal was found by Cheapflights users on 12/23. 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 12/316:10 amSOF - IAD
2 stops22h 11mUnited Airlines
Thu 1/295:38 pmIAD - SOF
2 stops22h 07mUnited Airlines
Deal found 12/23$760
This Kiwi.com deal was found by Cheapflights users on 12/24. 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 12/296:10 amSOF - IAD
1 stop21h 05mMultiple Airlines
Thu 12/176:15 pmIAD - SOF
1 stop16h 45mMultiple Airlines
Deal found 12/24$773
This Air France deal was found by Cheapflights users on 12/23. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amSOF - IAD
2 stops18h 01mMultiple Airlines
Tue 1/272:15 pmIAD - SOF
2 stops16h 50mMultiple Airlines
Deal found 12/23$788
This United Airlines deal was found by Cheapflights users on 12/23. 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 12/246:10 amSOF - PHL
2 stops42h 18mUnited Airlines
Sun 1/410:39 amPHL - SOF
2 stops24h 41mUnited Airlines
Deal found 12/23$808
This United Airlines deal was found by Cheapflights users on 12/23. 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 12/316:10 amSOF - DCA
2 stops24h 49mUnited Airlines
Sun 1/2512:59 pmDCA - SOF
2 stops17h 01mUnited Airlines
Deal found 12/23$808
This United Airlines deal was found by Cheapflights users on 12/23. 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 12/316:10 amSOF - DCA
2 stops21h 49mUnited Airlines
Tue 1/2712:59 pmDCA - SOF
2 stops17h 46mUnited Airlines
Deal found 12/23$809

Find flight deals from Sofia to Pennsylvania

Keep the following information in mind while searching for Sofia to Pennsylvania flight deals. Data was last updated December 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$545
(KLM)

One-way from

$315
(Kiwi.com)

Popular in

July

Cheapest in

March

Average price

$744
Provider with most accurate pricing for Sofia-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Philadelphia flights.
Search Deals
From Sofia to Pennsylvania
Search Deals
One-way flight from Sofia to Pennsylvania
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia to Pennsylvania 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 December 25, 2025.
Use the filters below to find and compare flights from Sofia to Pennsylvania that are best for you.

Fly from

Sofia

Fly to

Pennsylvania

Route

Depart

Return

Price

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Sat 1/17

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Tue 2/24

6:50 pm-1:55 pm

1 stop12h 05m

$545

SofiaNew York

SOF - JFK

SOFJFK

Sofia

Thu 3/12

8:25 pm-4:55 pm

1 stop26h 30m

New York John F Kennedy Intl

Sun 3/22

7:05 pm-7:35 pm

1 stop18h 30m

$545

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 4/9

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 4/15

6:10 pm-2:00 pm

1 stop12h 50m

$549

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 1/29

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sun 5/17

5:40 pm-2:00 pm

1 stop13h 20m

$550

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 1/16

7:00 am-7:09 pm

2 stops19h 09m

Washington, D.C. Dulles Intl

Mon 2/23

6:50 pm-2:05 pm

1 stop12h 15m

$555

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Thu 1/15

7:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Wed 1/28

2:15 pm-2:05 pm

2 stops16h 50m

$556

SofiaWashington, D.C.

SOF - DCA

SOFDCA

Sofia

Sat 1/17

7:00 am-6:29 pm

2 stops18h 29m

Washington, D.C. Reagan-National

Wed 2/25

1:40 pm-2:05 pm

2 stops17h 25m

$559

SofiaWashington, D.C.

SOF - DCA

SOFDCA

Sofia

Fri 1/16

7:00 am-5:53 pm

2 stops17h 53m

Washington, D.C. Reagan-National

Tue 2/24

1:40 pm-1:55 pm

2 stops17h 15m

$559

SofiaWashington, D.C.

SOF - DCA

SOFDCA

Sofia

Thu 1/15

7:00 am-4:29 pm

2 stops16h 29m

Washington, D.C. Reagan-National

Wed 1/28

1:40 pm-2:05 pm

2 stops17h 25m

$560

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

Fri 1/16

7:00 am-7:09 pm

2 stops19h 09m

Washington, D.C. Dulles Intl

Wed 2/25

2:15 pm-2:05 pm

2 stops16h 50m

$565

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

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

Have a flexible travel schedule? Discover the best time to fly to Pennsylvania from Sofia 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 Sofia to Pennsylvania

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

Find hourly flight availability from Sofia to Pennsylvania. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 25, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 20% on flights from Sofia to Pennsylvania by exploring options for tickets in the afternoon.

How much does it cost to fly round-trip from Sofia to Pennsylvania?

Reviews of airlines servicing Pennsylvania

Get insights into the airlines that provide service to Pennsylvania. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pennsylvania. Reviews last updated December 25, 2025.
Get a feel of what it's like to fly with United Airlines and Lufthansa from Sofia to Pennsylvania by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,114 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,114 reviews
United Airlines
7.4
Good
9,114 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Lufthansa
6.8
Okay
7,653 reviews
United Airlines
7.4
Good
9,114 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

Find useful and relevant information for your journey from Sofia to Pennsylvania. 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 from for flights from Sofia to Pennsylvania?

    Located just 4.2 mi from the city center, Sofia (SOF) is the airport most travelers will use when flying to Pennsylvania from Sofia.

  • How long is the flight from Sofia to Pennsylvania?

    KLM, British Airways, and Lufthansa can get you from Sofia to Pennsylvania in just under 14h 30m. Your travel time can differ by up to 2h 35m. There are 4707 mi between Sofia and Pennsylvania. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The most popular flight routes from Sofia to Pennsylvania are Sofia - Newark, Sofia - New York John F Kennedy Intl and Sofia - New York LaGuardia.

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

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

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

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

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

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

See more FAQs

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Alternative routes for Sofia to Pennsylvania

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Top 2 airlines flying from Sofia to Pennsylvania

Discover the top 2 airlines that operate flights from Sofia to Pennsylvania. 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 December 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$593Average$723FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$671Average$785FlexibilityNo cancel feeOn-time76%

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