There are most likely no direct flights on the Philadelphia — London route
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The cost of a one-way flight from Philadelphia to London ranges from $230 (March 2027) to $519 (December 2026). On average, the ticket price is about $415–$459.
A non-stop flight is the most convenient and comfortable way to fly from Philadelphia to London, despite the fact that sometimes flights with transfers can cost significantly less.
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Answers to questions about the route that travelers are most interested in.
We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.
Ticket prices for Philadelphia — London are higher at the start and end of the period but lowest in the middle. This creates a convenient window for booking at a reduced price.
Prices fall from December 2026 to March 2027 (56%), then rise from October 2026 to December 2026 (+13%). The best period is December 2026–March 2027 ($375), the most expensive is November 2026–December 2026 ($485).
The best time to buy is December 2026–March 2027, when prices are at their lowest. This can save you up to 23% compared to the expensive months (November 2026–December 2026).
Monthly price variation is 26.5%. On this route, your departure date noticeably affects the cost, and choosing wisely can lead to real savings.
All airports
There are most likely no direct flights on the Philadelphia — London route
Philadelphia — London
12/20/2026
Departure
Direct flight
AA4664
starting at $971
Philadelphia — London
12/19/2026
Departure
Direct flight
AA3804
starting at $982
starting at $971
starting at $789
Flights from Philadelphia to London are operated by several airlines — American Airlines and Frontier Airlines. This allows passengers to flexibly choose flights based on departure time, cost, and additional services. The minimum ticket price starts at $789, making this destination accessible to travelers with different budgets. We help compare all available options in real time, so you can book tickets at the best value for money. The service ensures transparent search and lets you book affordable flights in just a few clicks.
The cheapest flight ticket from Philadelphia to London according to data for the last 48 hours costs $789
Often the best time to buy tickets from Philadelphia to London is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Philadelphia to London can be found flying in these months: March, November, October.
The fastest flights from Philadelphia to London start from 20 hours 14 minutes in the air.
The following airlines operate direct flights on the route Philadelphia — London: American Airlines
The cheapest one-way flight from Philadelphia to London departs on 12/20/2026, is operated by Frontier Airlines and costs $789
The cheapest roundtrip flight from Philadelphia to London departs on 12/25/2026, is operated by Air Canada and costs $1,137
Fastest flight from Philadelphia to London takes 20h 14m
There are direct flights on this route 2 days a week: Su and Sa
The distance between Philadelphia and London is 5699km (3533 miles). There are 65 direct flights from Philadelphia to London. The time difference between Philadelphia and London is 5h. Flights from Philadelphia begin at 6:35 PM. The latest flight from Philadelphia departs at 8:25 PM
We couldn't find any special offers for flights from Philadelphia to London