Philadelphia to London flights
Round trip · Economy · Prices per person in USD
Prices updated
Prices are typical right now
$840 is close to the usual $885 for Philadelphia → London.
Buy now or wait? We're still learning this route. We have 1 day of prices so far and need about a week to say whether to book or wait.
Not ready to book? Get an email when Philadelphia → London drops below your price.Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| September 2026 | No fares found yet |
| October 2026 | $944 |
| November 2026 | $885 |
| December 2026 | $840 (cheapest month) |
| January 2027 | $893 |
| February 2027 | No fares found yet |
| March 2027 | No fares found yet |
| April 2027 | No fares found yet |
| May 2027 | No fares found yet |
| June 2027 | $863 |
Cheapest dates in the next 4 months
Round trip, per person-
Dec 11 – 29 18 nights · leave Fri$840 −5% vs usual$840 −5% vs usual Book
jetBlue 1 stop · 8h 07m -
Nov 5 – 9 4 nights · leave Thu$885$885 Book
jetBlue 1 stop · 8h 35m
-
Dec 11 – 19 8 nights · leave Fri$919$919 Book
Frontier Airlines 3 stops · 10h 56m -
Oct 31 – Nov 6 6 nights · leave Sat$944 +7% vs usual$944 +7% vs usual Book
Frontier Airlines 3 stops · 12h 44m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in London
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Airport transfer to London
Fixed prices from LHR on KiwitaxiTo see transfer prices here, turn on partner content in .
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Plan the rest of your trip
London · Dec 11 – 29Travel insurance · EKTA Airport transfer · Kiwitaxi
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Philadelphia to London: questions
How much is a flight from Philadelphia to London?
The cheapest round trip we have found right now is $840, leaving December 11 and returning December 29. The usual price on this route is about $885, so this fare is 5% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Philadelphia to London?
December 2026, with round trips from $840. The most expensive month in our data is October (from $944). Based on the 5 months ahead we have prices for.
About this route
We track round-trip economy fares from Philadelphia (United States) to London (United Kingdom) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $840, departing December 11 and returning December 29, about 5% below the usual $885. The cheapest month to fly in our data is December, from $840. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.