$440 Find Cheap Flights from Philadelphia to Bulgaria

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Bulgaria departing on 7/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Philadelphia to Bulgaria

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Sofia
Sofia2 stops$616
Burgas
Burgas1 stop$1,143
Sofia
Sofia2 stops$616
Burgas
Burgas1 stop$1,143

Book Cheap Philadelphia to Bulgaria Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Bulgaria that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Bulgaria

Tue, Mar 31 - Tue, Apr 7
United Airlines Logo
7:45 pm - 11:00 pm
PHL
-
SOF
20h 15m
2 stops
United Airlines Logo
2:10 pm - 9:58 am
SOF
-
PHL
26h 48m
2 stops
$616United Airlines
Tue, Mar 31 - Tue, Apr 7
Lufthansa Logo
5:40 pm - 1:05 pm
PHL
-
SOF
12h 25m
1 stop
Lufthansa Logo
6:10 am - 4:05 pm
SOF
-
PHL
16h 55m
2 stops
$630Lufthansa
Wed, Sep 9 - Wed, Sep 16
United Airlines Logo
11:30 am - 1:25 pm
PHL
-
SOF
18h 55m
2 stops
United Airlines Logo
6:20 am - 2:47 pm
SOF
-
PHL
15h 27m
2 stops
$652United Airlines
Tue, Mar 31 - Tue, Apr 7
United Airlines Logo
7:45 pm - 6:40 pm
PHL
-
SOF
15h 55m
2 stops
United Airlines Logo
2:10 pm - 2:10 pm
SOF
-
PHL
31h 00m
2 stops
$666United Airlines
Tue, Aug 4 - Thu, Aug 20
Multiple Airlines Logo
10:05 am - 11:00 am
PHL
-
SOF
17h 55m
2 stops
Multiple Airlines Logo
6:30 am - 2:49 pm
SOF
-
PHL
15h 19m
2 stops
$670Multiple Airlines
Tue, Mar 31 - Tue, Apr 7
United Airlines Logo
5:40 pm - 1:05 pm
PHL
-
SOF
12h 25m
1 stop
United Airlines Logo
2:10 pm - 9:58 am
SOF
-
PHL
26h 48m
2 stops
$673United Airlines
Tue, Mar 31 - Tue, Apr 7
Lufthansa Logo
5:40 pm - 1:05 pm
PHL
-
SOF
12h 25m
1 stop
Lufthansa Logo
6:10 am - 4:05 pm
SOF
-
PHL
16h 55m
2 stops
$679Lufthansa
Tue, Mar 31 - Tue, Apr 7
Lufthansa Logo
5:40 pm - 1:05 pm
PHL
-
SOF
12h 25m
1 stop
Lufthansa Logo
6:10 am - 4:05 pm
SOF
-
PHL
16h 55m
2 stops
$680Lufthansa
Mon, May 4 - Tue, May 26
United Airlines Logo
1:26 pm - 6:40 pm
PHL
-
SOF
22h 14m
2 stops
United Airlines Logo
6:10 am - 9:33 pm
SOF
-
PHL
22h 23m
2 stops
$690United Airlines
Tue, Aug 4 - Thu, Aug 20
Multiple Airlines Logo
3:25 pm - 1:05 pm
PHL
-
SOF
14h 40m
2 stops
Multiple Airlines Logo
6:30 am - 2:49 pm
SOF
-
PHL
15h 19m
2 stops
$704Multiple Airlines
Booking Insights

KAYAK's insights & trends for Philadelphia to Bulgaria flights

Get data-powered insights and trends into flights from Philadelphia to Bulgaria to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Philadelphia to Bulgaria?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Bulgaria, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Bulgaria is November, when tickets cost $540 (return) on average. On the other hand, the most expensive months are January and May, when the average cost of round-trip tickets is $7,242 and $1,066 respectively.

Good to know

Low seasonJanuary
Cheapest flight$440
Best time to beat the crowds but there is an average 449% increase in price.
Most popular time to fly and prices are also 41% lower on average.
Flight from Philadelphia to Burgas

FAQs - booking Bulgaria flights

  • How does KAYAK find such low prices on flights from Philadelphia to Bulgaria?

    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 Philadelphia to Bulgaria.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Philadelphia to Bulgaria 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 Philadelphia to Bulgaria?

    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 from Philadelphia to Bulgaria with an airline and back with another airline.

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

    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 from Philadelphia to Bulgaria up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Philadelphia to Bulgaria

 
Need help choosing which airline to fly with from Philadelphia to Bulgaria? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9451 reviews
7.7Boarding
6.6Food
7.3Comfort
7.1Entertainment
8.1Crew
Airline reviews

Experience was great - no complaints. Took off on time, landed early. Got to the gate relatively quickly - took a little bit of extra time to deplane but nothing excessive.

10.0 ExcellentLaura, Mar 2026
MCO - EWR
Read more United Airlines reviews

Experience was great - no complaints. Took off on time, landed early. Got to the gate relatively quickly - took a little bit of extra time to deplane but nothing excessive.

Business class seats felt very cramped compared to other airlines.

Economy plus was so cramped I could not use my laptop. It was beyond bad.

OK, we were delayed and had to de plane and reboard.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

Very good, i got two seats for myself, and was comfortable with the blanket i got

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Economy Priority seats are extremely uncomfortable. There is no way to escape the boxed in feeling, particularely because the distance between to rows are too short, the hard edge of the front row is keeping legs confined. There is no elevated place to put your feet. I am of average, European size.

Terrible. Both flights were significantly delayed, no luggage, made me check my small bag when many, many others had much larger carry-ons, not even a bottle of water . . . I will not fly Discover Airlines again.

I was deceived on the Kayak site expecting a ticket, but instead finding a "standby" reservation. When I tried to change the ticket, I paid almost twice the price of the original ticket. Then, the airline refused to give me the reserved seat I had chosen and paid for. I think I deserve a refund for this leg of my trip because I was doubly charged and did not receive what I had paid for. I put in a complaint with Lufthansa because the ticket was sold originally sold as a flight they listed. Someone here needs to take responsibility.

Excellent service; they helped me reschedule so I can fly in an earlier flight

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Everything you need to know for your flight from Philadelphia to Bulgaria

Information on your arrival and departure airports