How long is the flight from Philadelphia to London?

Non-stop flights on PHL → LHR are typically around 7 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.

Which airlines fly from Philadelphia to London?

The main carriers on this route are British Airways, American. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.

When is the cheapest time to fly from Philadelphia to London?

Historically the lowest fares land in January, February, November. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.

How far ahead should I book Philadelphia to London?

Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.

Can I book directly on destination.com?

The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

PHL → LHR

Philadelphia to London flights.

Live cached fares on Philadelphia (PHL) → London (LHR), refreshed every 30 minutes. Non-stop and connecting itineraries side by side — compare airlines, times and stops, then book in one click.

Flying time
~7h non-stop
Airlines
British Airways, American
Cheapest months
January, February, November

Flex dates · cheapest nearby

Loading prices…

No cached fares for exactly 2026-06-08 → 2026-06-15. Showing recent fares on PHL → LHR — pick a different date in the calendar above or run a live search.

Philadelphia → London · 3 fares

Cached from Travelpayouts · filter & sort below

Showing 3 of 3 results

Cheapest
Frontier · F9 91
OutboundPHL → LHRTue, Jun 16 · 10:25 AM· 16h· 2 stops
$590
one-way
Book →
2Z · 2Z 3721
OutboundPHL → LHRFri, Sep 18 · 9:38 PM· 8h 19m· 1 stop
ReturnLHR ← PHLSat, Oct 17 · 3:05 PM· 9h 24m· 1 stop
$1,034
total round-trip
Book →
Air Canada · AC 8858
OutboundPHL → LHRFri, Jun 26 · 2:05 PM· 8h 34m· 1 stop
ReturnLHR ← PHLSun, Jun 28 · 8:30 AM· 10h 25m· 1 stop
$1,196
total round-trip
Book →

Try a nearby airport

Thin routes often have more options from a neighbouring airport.

Philadelphia (PHL) → London (LGW)

nearby destination

Philadelphia (PHL) → London (STN)

nearby destination

About Philadelphia → London

AA + BA JV 2x daily. PHL is AA's cheapest transatlantic departure — consistently 10-20% under JFK on the same dates.

Typical non-stop flying time is around 7 hours. Major carriers on this route include British Airways, American. Fares are usually cheapest in January, February, November — book 6–10 weeks ahead and avoid school-holiday peaks (late June–August, Christmas–New Year) for the best pricing.

Month-by-month price guide: Philadelphia to London

Live cheapest round-trip fare cached on PHL → LHR for each of the next 12 months. Tap any month and run a live search to confirm.

Apr
No data
May
No data
Jun
Peak
from $1196
Jul
No data
Aug
No data
Sep
Low
from $1034
Oct
No data
Nov
No data
Dec
No data
Jan
No data
Feb
No data
Mar
No data

Cheapest next 12 months: September from $1034 round-trip. Run a live search →

Booking window tip

Medium-haul is the classic 6-10 week booking window. Fares drift down as the departure gets closer until about 21 days out, then start climbing fast. Tuesday and Wednesday departures are typically 10-18% cheaper than Friday or Sunday.

Questions, answered

How long is the flight from Philadelphia to London?
Non-stop flights on PHL → LHR are typically around 7 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.
Which airlines fly from Philadelphia to London?
The main carriers on this route are British Airways, American. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.
When is the cheapest time to fly from Philadelphia to London?
Historically the lowest fares land in January, February, November. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.
How far ahead should I book Philadelphia to London?
Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.
Can I book directly on destination.com?
The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

Other ways to reach London

If your plans are flexible on the origin, these alternate departure airports also serve London on the routes we track.

Other popular routes

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