
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $728 (Kiwi.com) |
One-way from | $287 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $821 |
Good round-trip deal | $982 or less |
Good one-way deal | $540 or less |
Fly from
Fly to
Route
Depart
Return
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Tue 9/8
9:40 am-9:20 am
2 stops18h 40m
London Heathrow
Tue 9/15
7:05 am-7:58 pm
3 stops17h 53m
PhiladelphiaLondon
PHL - STN
PHLSTN
Philadelphia
Fri 5/1
11:59 am-12:50 am
3 stops31h 51m
London Stansted
Sat 5/9
5:30 pm-11:45 pm
3 stops35h 15m
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Sun 9/27
2:12 pm-9:40 pm
2 stops26h 28m
London Heathrow
Sat 10/3
6:40 am-12:27 am
2 stops22h 47m
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Wed 9/30
9:40 am-4:00 pm
2 stops25h 20m
London Heathrow
Fri 10/9
6:40 am-10:56 pm
2 stops21h 16m
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Wed 9/30
5:50 pm-8:00 am
1 stop9h 10m
London Heathrow
Fri 10/9
6:15 am-3:45 pm
1 stop14h 30m
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Wed 9/30
9:40 am-4:00 pm
2 stops25h 20m
London Heathrow
Tue 10/6
7:50 pm-8:07 pm
3 stops29h 17m
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Wed 9/30
2:12 pm-7:15 am
1 stop12h 03m
London Heathrow
Fri 10/9
9:55 am-10:38 pm
2 stops17h 43m
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Wed 9/30
7:35 pm-7:50 am
Nonstop7h 15m
London Heathrow
Fri 10/9
1:00 pm-4:00 pm
Nonstop8h 00m
PhiladelphiaLondon
PHL - LHR
PHLLHR
Philadelphia
Tue 8/25
9:40 am-12:55 pm
3 stops22h 15m
London Heathrow
Tue 9/1
7:05 am-10:37 pm
3 stops20h 32m
PhiladelphiaLondon
PHL - STN
PHLSTN
Philadelphia
Mon 5/18
6:00 am-12:50 pm
2 stops25h 50m
London Stansted
Mon 5/25
6:30 am-9:33 pm
2 stops20h 03m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
Booking 54 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, February is the cheapest month in which you can book a flight from Philadelphia to London (average of $45). Flying from Philadelphia to London in August is currently the most expensive (average of $842). 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.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to London as you normally would.
The most flights from PHL to LON are scheduled on a Monday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (15 on average).
Dublin (DUB) – chosen by Cheapflights users on 90% of 1-stop itineraries from Philadelphia to London on Cheapflights.
Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of $687.
Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 9h 35m.
Flights via Atlanta (ATL) offer the fastest connection on this route, with an average layover time of 1h 38m.
Overall
Comfort
Crew
Food
Boarding
Entertainment
Reviews
Firuz,Feb 2026
FRA - HEL
Overall
Comfort
Crew
Food
Boarding
Entertainment
Reviews
Firuz,Feb 2026
FRA - HEL
Overall
Comfort
Crew
Food
Boarding
Entertainment
Reviews
Firuz,Feb 2026
FRA - HEL
Overall
Comfort
Crew
Food
Boarding
Entertainment
Reviews
Firuz,Feb 2026
FRA - HEL
Overall
Comfort
Crew
Food
Boarding
Entertainment
Reviews
Firuz,Feb 2026
FRA - HEL
Overall
Comfort
Crew
Food
Boarding
Entertainment
Reviews
Firuz,Feb 2026
FRA - HEL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$484 | Average$759 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$501 | Average$744 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$513 | Average$823 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$515 | Average$845 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$576 | Average$815 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$614 | Average$668 | FlexibilityNo cancel fee | On-time62% |