Cheapest return flights from Philadelphia to London in August from 816€

Best time to book flights for Philadelphia (PHL) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from Philadelphia (PHL) to London (LHR) in August 2025 (see full year).

Return flights

21 Aug - 27 Aug Aer Lingus
19 Aug - 26 Aug United
15 Aug - 22 Aug Aer Lingus
15 Aug - 22 Aug Finnair direct
21 Aug - 27 Aug British Airways direct
06 Aug - 13 Aug Aer Lingus
05 Aug - 14 Aug Aer Lingus
29 Aug - 05 Sep United
06 Aug - 13 Aug British Airways direct
05 Aug - 14 Aug Iberia direct
02 Aug - 07 Aug Aer Lingus

Also check the deals for one-way flights from Philadelphia to London in August.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in London

Cheap car rent in London