Cheap flights from Philadelphia International to London Heathrow from $449
Updated 2026-05-27
3536 miles great-circle distance, typically flown in 7h 31m with 5 airlines operating direct service from Philadelphia International (PHL) to London Heathrow (LHR). Cheapest fares are usually in Jun (around $449 return), with peak prices in Jun (around $1347). Departures on a Tuesday tend to undercut weekend prices on this corridor.
Flying from Philadelphia International
Philadelphia International is American Airlines' largest East Coast hub after Charlotte. Six terminals A through F are connected airside, with SEPTA's Airport Line running from each terminal directly to 30th Street Station downtown in 25 minutes for $7.75. American operates the bulk of the schedule; Frontier and Spirit run heavy ULCC operations on leisure routes. Transatlantic service to Europe is dense — daily flights to London, Frankfurt, Madrid, Doha and Dublin make PHL the cheapest gateway for many small-city US travellers heading to Europe.
Arriving in London
London Heathrow is 24 km west of central London — the deepest transatlantic hub from anywhere on the US East Coast. The Elizabeth Line and Heathrow Express both reach Paddington (15 minutes Express, 30 minutes Elizabeth) for £25 and £13.30 respectively. US carriers (American, Delta, United, JetBlue) and BA dominate the corridor. Cheapest fares from US East Coast: late January and February; peak demand is June–August.
Who flies PHL to LHR?
| Airline | IATA | Flight time | Cabin |
| American Airlines | AA | 7h 31m | Economy |
| British Airways | BA | 7h 31m | Economy |
| Lufthansa | LH | 7h 31m | Economy |
| Qatar Airways | QR | 7h 31m | Economy |
| Aer Lingus | EI | 7h 31m | Economy |
5 carriers fly direct on this corridor. Frequencies vary by season — summer and winter holiday peaks see additional flights.
Best time to fly PHL→LHR
Aggregated from 12 months of Travelpayouts fare data. Cheapest months in green, peak in red.
Source: Travelpayouts route data, refreshed every 30 days. Cheapest day-of-week typically Tuesday.
Philadelphia to London FAQs
Direct flights from Philadelphia International (PHL) to London Heathrow (LHR) take approximately 7h 31m for the 3536-mile journey, plus 30–60 minutes of taxi, climb and descent. Total airport-to-airport time depends on cruise winds and air-traffic queueing on approach.
Jun is typically the cheapest month on this route, with one-way fares from $449. Jun is the peak — expect prices 2–3× higher. Book 4–8 weeks ahead for best fares; last-minute prices on this corridor rise sharply inside two weeks of departure.
5 carriers operate direct service from Philadelphia International (PHL) to London Heathrow (LHR): American Airlines, British Airways, Lufthansa, Qatar Airways and Aer Lingus. Frequencies vary by season and carrier — American Airlines typically operates the highest weekly count on this corridor.
Electronic Travel Authorisation (ETA) required for US passport holders from 2025 — apply online, £10. Always check travel.state.gov for the latest entry requirements before booking.
London Heathrow (LHR) is the primary international airport for London. Allow 30–60 minutes for the ground transfer by train, express bus, taxi or rideshare depending on traffic and time of day. See the airport's official website for current train and shuttle timetables.