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$259+ 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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — PHL
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
1 adult, Economy
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Cheap flight deals from Sofia to Pennsylvania

Keep the following information in mind while searching for Sofia to Pennsylvania flight deals. Data was last updated septiembre 15, 2025.

Round-trip from

$439
(KLM)

One-way from

$259
(Kiwi.com)

Popular in

November

Cheapest in

March

Average price

$602
From Sofia to Pennsylvania
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One-way flight from Sofia to Pennsylvania
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Highest demand for flights based on searches. 8% potential increase in price ($69 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 septiembre 15, 2025.

This KLM deal was found by Cheapflights users on 9/13. 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.
mié. 10/157:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
mar. 11/116:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 9/13$439
This KLM deal was found by Cheapflights users on 9/14. 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.
jue. 9/257:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
jue. 10/96:30 pmIAD - SOF
1 stop12h 30mMultiple Airlines
Deal found 9/14$440
This Air France deal was found by Cheapflights users on 9/14. 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.
mar. 9/307:00 amSOF - IAD
1 stop16h 20mAir France
mié. 10/156:30 pmIAD - SOF
1 stop12h 30mAir France
Deal found 9/14$445
This KLM deal was found by Cheapflights users on 9/12. 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.
mar. 10/217:00 amSOF - DCA
2 stops17h 10mMultiple Airlines
mar. 11/43:00 pmDCA - SOF
2 stops15h 55mMultiple Airlines
Deal found 9/12$445
This KLM deal was found by Cheapflights users on 9/15. 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.
mar. 10/217:00 amSOF - IAD
2 stops16h 57mMultiple Airlines
jue. 11/206:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 9/15$449
This KLM deal was found by Cheapflights users on 9/15. 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.
mar. 10/217:00 amSOF - DCA
2 stops17h 10mMultiple Airlines
mié. 11/192:59 pmDCA - SOF
2 stops16h 06mMultiple Airlines
Deal found 9/15$454
This KLM deal was found by Cheapflights users on 9/14. 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.
mié. 10/17:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
jue. 12/46:50 pmIAD - SOF
1 stop12h 05mMultiple Airlines
Deal found 9/14$456
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
jue. 11/67:30 pmSOF - JFK
1 stop27h 25mMultiple Airlines
mié. 11/196:05 pmJFK - SOF
1 stop25h 50mMultiple Airlines
Deal found 9/15$488
This KLM deal was found by Cheapflights users on 9/14. 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.
mié. 10/17:00 amSOF - IAD
1 stop15h 35mMultiple Airlines
vie. 12/512:19 pmIAD - SOF
2 stops18h 36mMultiple Airlines
Deal found 9/14$491
This KLM deal was found by Cheapflights users on 9/14. 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.
mié. 10/17:00 amSOF - IAD
1 stop15h 35mKLM
sáb. 12/66:05 pmIAD - SOF
1 stop13h 00mKLM
Deal found 9/14$492
This Mytrip deal was found by Cheapflights users on 9/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/91:30 pmSOF - JFK
3 stops33h 10mMultiple Airlines
mar. 10/145:10 pmJFK - SOF
3 stops22h 55mMultiple Airlines
Deal found 9/13$507
This oojo deal was found by Cheapflights users on 9/13. 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.
jue. 11/62:35 pmSOF - EWR
1 stop12h 50mLOT
mié. 11/1911:10 pmEWR - SOF
1 stop11h 40mLOT
Deal found 9/13$515

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 septiembre 15, 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

mié. 10/22

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

jue. 11/20

6:50 pm-1:55 pm

1 stop12h 05m

$439

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

jue. 10/16

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

mar. 11/11

6:50 pm-1:55 pm

1 stop12h 05m

$439

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

jue. 10/16

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

mié. 11/12

6:50 pm-2:05 pm

1 stop12h 15m

$439

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

mié. 10/15

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

mar. 11/11

6:50 pm-1:55 pm

1 stop12h 05m

$439

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

mié. 10/15

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

jue. 11/13

6:50 pm-1:55 pm

1 stop12h 05m

$439

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

mar. 10/14

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

jue. 11/13

6:50 pm-1:55 pm

1 stop12h 05m

$439

SofiaWashington, D.C.

SOF - IAD

SOFIAD

Sofia

jue. 10/23

7:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

jue. 11/20

6:50 pm-1:55 pm

1 stop12h 05m

$439

SofiaWashington, D.C.

SOF - DCA

SOFDCA

Sofia

mié. 10/22

7:00 am-6:59 pm

2 stops18h 59m

Washington, D.C. Reagan-National

mié. 11/5

3:00 pm-2:05 pm

2 stops16h 05m

$445

SofiaNewark

SOF - EWR

SOFEWR

Sofia

jue. 11/6

2:35 pm-8:25 pm

1 stop12h 50m

Newark

mié. 11/19

11:10 pm-5:50 pm

1 stop11h 40m

$515

SofiaNewark

SOF - EWR

SOFEWR

Sofia

mar. 11/18

4:00 pm-10:30 pm

1 stop13h 30m

Newark

lun. 3/16

1:25 am-3:10 pm

1 stop31h 45m

$558

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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 month to book a flight from Sofia to Pennsylvania?

Currently, August is the cheapest month in which you can book a flight from Sofia to Pennsylvania (average of $236). Flying from Sofia to Pennsylvania in March is currently the most expensive (average of $295). 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 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 septiembre 15, 2025.

When flying from Sofia to Pennsylvania, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 septiembre 15, 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
8,929 reviews

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Lufthansa
6.8
Okay
7,407 reviews
United Airlines
7.4
Good
8,929 reviews

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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?

    LOT, Turkish Airlines, and British Airways can get you from Sofia to Pennsylvania in just under 12h 50m. Your travel time can differ by up to 17h 05m. There are 4721 mi between Sofia and Pennsylvania. Both multi-stop and nonstop flights can be found to your destination and back.

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

    One-way options have recently been found by users for as low as $389 on American Airlines. Other airlines that offer cheap prices include British Airways from $391 and Qatar Airways from $629 one-way.

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Sofia to Pennsylvania (average of $236). Flying from Sofia to Pennsylvania in March is currently the most expensive (average of $295). 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 Sofia to Pennsylvania

See prices for flight routes from nearby airports that may be better suited for you.
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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 septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$588Average$730FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$602Average$774FlexibilityNo cancel feeOn-time76%

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