Cheap flights from Philadelphia to Sofia from $1,114 PHL → SOF
Philadelphia International Airport (PHL) → Sofia Airport (SOF)
The cheapest return found recently is $1,114 with United Airlines, 14 Nov – 17 Nov, found yesterday.
- Cheapest return found recently
- $1,114, 14 Nov to 17 Nov
- Usual return price
- $945 to $1,185
- Cheapest month to fly
- November 2026, return fares from $776 found in the last 7 days
Return
The cheapest return fare on each of 3 departure dates is usually $945 to $1,185.
Cheapest return found recently
$1,114
14 Nov – 17 Nov · United Airlines
Philadelphia International Airport (PHL) → Sofia Airport (SOF)
Leaves 1:16 p.m. · Return leaves 6:25 a.m. · 33 h 39 min of travel, both ways together
out 2 stops, back 1 stop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$1,114 14 Nov – 17 Novfound yesterdaySee prices for these dates
$776 25 Nov – 5 Decfound 7 days agoSee prices for these dates
What have prices looked like?
Over 18 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $689 to $1,207.
18 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 3 departure dates from 14 Nov to 21 Dec, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 3-night return fares leaving within 3 days of 14 Nov to compare.
Every date we hold
4 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 14 Nov – 17 Nov | $1,114 | United Airlines | Philadelphia International Airport (PHL) → Sofia Airport (SOF) | out 2 stops, back 1 stop | found yesterday | See prices for these dates |
| 25 Nov – 5 Dec | $776 | United Airlines | Philadelphia International Airport (PHL) → Sofia Airport (SOF) | out 2 stops, back 2 stops | found 7 days ago | See prices for these dates |
| 21 Dec – 11 Jan 2027 | $1,256 | Aer Lingus | Philadelphia International Airport (PHL) → Sofia Airport (SOF) | out 3 stops, back 3 stops | found 7 days ago | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $776.
Airlines on the cheapest dates: United Airlines, Aer Lingus.
Premium cabin fares from Philadelphia to Sofia
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 14 Nov – 17 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Philadelphia to Sofia?
Return
Not enough history yet: in 18 days of return prices, 24 Sept to 11 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
New York → Sofia
130 km from Philadelphia
$820
$294 less than flying from Philadelphia
11 May 2027 – 30 Jun 2027 · JFK → SOF · out 1 stop, back 1 stop
found 3 days ago
Baltimore → Sofia
145 km from Philadelphia
$867
$247 less than flying from Philadelphia
12 Feb 2027 – 20 Feb 2027 · BWI → SOF · out 2 stops, back 1 stop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 14 Nov – 17 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Philadelphia to Sofia?
The cheapest return found recently is $1,114 with United Airlines, 14 Nov to 17 Nov, found yesterday. The cheapest return we hold, of any age, is $776 with United Airlines, 25 Nov to 5 Dec, found 7 days ago. The cheapest return fare on each of 3 departure dates is usually $945 to $1,185.
What is the cheapest month to fly from Philadelphia to Sofia?
November 2026 is the cheapest month for a return, from $776, 25 Nov to 5 Dec, found 7 days ago.
Which airlines have the cheapest flights from Philadelphia to Sofia?
Between 14 Nov and 21 Dec, United Airlines has the cheapest return on 2 of the 3 departure dates we hold, and Aer Lingus on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work