How does KAYAK find such low prices on flights from Pennsylvania to Sofia?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to Sofia.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to Sofia?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Pennsylvania to Sofia?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sofia with an airline and back to Pennsylvania with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to Sofia?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sofia from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$210 CHEAP FLIGHTS from Pennsylvania to Sofia

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Flight Deals

Cheap Flights from Pennsylvania to Sofia

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Pennsylvania to Sofia

Tue, Jan 5 - Mon, Jan 11

6:35 pm - 8:10 pmPHL Philadelphia-SOF Sofia

18h 35m1 stop London Heathrow

5:15 pm - 4:15 pmSOF Sofia-PHL Philadelphia

30h 00m1 stop London Heathrow

$544British Airways

Tue, Jan 5 - Mon, Jan 11

6:00 pm - 8:10 pmPHL Philadelphia-SOF Sofia

19h 10m2 stops Boston Logan Intl London Heathrow

5:15 pm - 4:15 pmSOF Sofia-PHL Philadelphia

30h 00m1 stop London Heathrow

$548British Airways

Tue, Oct 27 - Tue, Nov 3

6:15 am - 1:15 pmPHL Philadelphia-SOF Sofia

25h 00m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

7:55 am - 11:31 pmSOF Sofia-PHL Philadelphia

22h 36m2 stops Vienna Intl Washington, D.C. Dulles Intl

$598United Airlines

Tue, Oct 27 - Tue, Nov 3

1:20 pm - 1:15 pmPHL Philadelphia-SOF Sofia

17h 55m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:25 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 40m1 stop Frankfurt am Main

$599United Airlines

Tue, Oct 27 - Tue, Nov 3

6:40 pm - 1:25 pmPHL Philadelphia-SOF Sofia

12h 45m1 stop Frankfurt am Main

6:25 am - 4:05 pmSOF Sofia-PHL Philadelphia

16h 40m1 stop Frankfurt am Main

$606Lufthansa

Tue, Dec 1 - Tue, Dec 8

6:10 pm - 11:55 pmIAD Washington, D.C. Dulles Intl-SOF Sofia

22h 45m1 stop Vienna Intl

7:55 am - 2:10 pmSOF Sofia-IAD Washington, D.C. Dulles Intl

13h 15m1 stop Vienna Intl

$607Austrian Airlines

Tue, Oct 27 - Tue, Nov 3

7:00 pm - 11:50 amIAD Washington, D.C. Dulles Intl-SOF Sofia

10h 50m1 stop Vienna Intl

7:55 am - 2:10 pmSOF Sofia-IAD Washington, D.C. Dulles Intl

13h 15m1 stop Vienna Intl

$607Austrian Airlines

Wed, Nov 18 - Wed, Nov 25

10:55 pm - 6:20 pmIAD Washington, D.C. Dulles Intl-SOF Sofia

12h 25m1 stop Munich Franz Josef Strauss

6:00 am - 8:05 pmSOF Sofia-IAD Washington, D.C. Dulles Intl

21h 05m1 stop Munich Franz Josef Strauss

$609Lufthansa

Tue, Oct 20 - Tue, Nov 17

10:50 pm - 1:50 pmEWR Newark-SOF Sofia

32h 00m1 stop Warsaw Frederic Chopin

2:35 pm - 8:25 pmSOF Sofia-EWR Newark

12h 50m1 stop Warsaw Frederic Chopin

$639LOT

Thu, Oct 15 - Wed, Nov 11

10:50 pm - 6:00 pmEWR Newark-SOF Sofia

12h 10m1 stop Warsaw Frederic Chopin

2:35 pm - 9:00 pmSOF Sofia-EWR Newark

13h 25m1 stop Warsaw Frederic Chopin

$639LOT

Recent last minute flight deals from Pennsylvania to Sofia

Sun, Sep 20 - Wed, Oct 7

10:25 pm - 7:20 pmIAD Washington, D.C. Dulles Intl-SOF Sofia

13h 55m1 stop London Heathrow

9:25 pm - 3:55 pmSOF Sofia-IAD Washington, D.C. Dulles Intl

25h 30m1 stop London Heathrow

$650British Airways

Sun, Sep 20 - Mon, Oct 5

6:23 pm - 7:20 pmDCA Washington, D.C. Reagan-National-SOF Sofia

17h 57m2 stops New York John F Kennedy Intl London Heathrow

8:10 pm - 7:05 pmSOF Sofia-DCA Washington, D.C. Reagan-National

29h 55m2 stops London Heathrow New York John F Kennedy Intl

$658British Airways

Sun, Sep 20 - Thu, Nov 5

8:30 pm - 12:15 pmJFK New York John F Kennedy Intl-SOF Sofia

32h 45m1 stop Zurich

4:15 pm - 1:15 pmSOF Sofia-JFK New York John F Kennedy Intl

28h 00m1 stop Zurich

$773SWISS

Sun, Sep 20 - Thu, Nov 5

12:45 pm - 2:55 pmEWR Newark-SOF Sofia

19h 10m2 stops Halifax Intl Zurich

4:15 pm - 8:30 pmSOF Sofia-EWR Newark

35h 15m1 stop Zurich

$778SWISS

Sun, Sep 20 - Thu, Nov 5

5:40 pm - 11:40 amEWR Newark-SOF Sofia

11h 00m1 stop Vienna Intl

7:55 am - 1:55 pmSOF Sofia-EWR Newark

13h 00m1 stop Vienna Intl

$778United Airlines

Sun, Sep 20 - Tue, Nov 3

5:40 pm - 11:40 amEWR Newark-SOF Sofia

11h 00m1 stop Vienna Intl

7:55 am - 1:55 pmSOF Sofia-EWR Newark

13h 00m1 stop Vienna Intl

$778United Airlines

Sun, Sep 20 - Mon, Nov 2

5:40 pm - 6:10 pmEWR Newark-SOF Sofia

17h 30m1 stop Vienna Intl

6:45 pm - 1:55 pmSOF Sofia-EWR Newark

26h 10m1 stop Vienna Intl

$788Austrian Airlines

Wed, Sep 16 - Thu, Oct 8

9:45 pm - 3:20 pmJFK New York John F Kennedy Intl-SOF Sofia

10h 35m1 stop Vienna Intl

12:25 pm - 8:05 pmSOF Sofia-JFK New York John F Kennedy Intl

14h 40m1 stop Vienna Intl

$800Austrian Airlines

Thu, Sep 17 - Wed, Sep 30

12:50 pm - 11:45 amJFK New York John F Kennedy Intl-SOF Sofia

15h 55m1 stop Istanbul

9:35 am - 5:55 pmSOF Sofia-JFK New York John F Kennedy Intl

15h 20m1 stop Istanbul

$814Turkish Airlines

Sun, Sep 20 - Mon, Oct 5

1:15 pm - 3:00 pmIAD Washington, D.C. Dulles Intl-SOF Sofia

18h 45m1 stop Istanbul

9:35 am - 11:30 amSOF Sofia-IAD Washington, D.C. Dulles Intl

32h 55m1 stop Istanbul

$832Turkish Airlines

Useful Info

Low season	January
High season	September
Cheapest flight	$210

Best time to beat the crowds but there is an average 256% increase in price.

Most popular time to fly and prices are also 29% lower on average.

Flight from Newark Liberty Airport to Sofia

How does KAYAK find such low prices on flights from Pennsylvania to Sofia?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to Sofia.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to Sofia?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Pennsylvania to Sofia?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sofia with an airline and back to Pennsylvania with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to Sofia?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sofia from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.