Philadelphia to London flights
The cheapest round trip we found from Philadelphia to London is $802 (Nov 26 – 30, 1 stop), 7% below the usual $860.
PHL to LON · Round trip · Economy · Prices per person in USD · Price found (2 days ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $802 (cheapest month) |
| December 2026 | $841 |
| January 2027 | $936 |
| February 2027 | No fares found yet |
| March 2027 | $860 |
| April 2027 | $932 |
Cheapest dates in the next 4 months
Round trip, per person-
Nov 26 – 30 4 nights · leave Thu$802 −7% vs usual$802 −7% vs usual Book
United Airlines 1 stop · 8h 48m -
Dec 1 – 5 4 nights · leave Tue$841$841 Book
jetBlue 1 stop · 8h 07m -
Jan 6 – 9, 2027 3 nights · leave Wed$936 +9% vs usual$936 +9% vs usual Book
British Airways 2 stops · 8h 09m
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
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Plan the rest of your trip
London · Nov 26 – 30- eSIM for United Kingdom Yesim · prepaid mobile data (opens Yesim in a new tab)
- Car rental in United Kingdom Economybookings · compare rental companies (opens Economybookings in a new tab)
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Good to know
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Philadelphia to London: questions
How much does a flight from Philadelphia to London cost?
The cheapest round trip we have found right now is $802, leaving November 26 and returning November 30. The usual price on this route is about $860, so this fare is 7% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Philadelphia to London?
November 2026, with round trips from $802. The most expensive month in our data is January (from $936). Based on the 5 months ahead we have prices for.
Which airports do Philadelphia to London flights use?
Philadelphia airports include Philadelphia International (PHL) and Trenton-Mercer (TTN). London airports include London Heathrow (LHR), London City (LCY) and London Gatwick (LGW). The prices on this page cover every airport in both cities (PHL and LON are the city codes).
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 $802, departing November 26 and returning November 30, about 7% below the usual $860. The cheapest month to fly in our data is November, from $802. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.