Cheapest return flights from Philadelphia to London in August from $745

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

27 Aug - 06 Sep jetBlue
28 Aug - 04 Sep jetBlue
28 Aug - 06 Sep jetBlue
21 Aug - 27 Aug jetBlue
22 Aug - 28 Aug Aer Lingus
29 Aug - 05 Sep jetBlue
21 Aug - 04 Sep Aer Lingus
24 Aug - 31 Aug United
27 Aug - 06 Sep British Airways direct
21 Aug - 04 Sep British Airways direct
14 Aug - 21 Aug United
22 Aug - 28 Aug Iberia direct
07 Aug - 13 Aug jetBlue
29 Aug - 05 Sep British Airways direct
28 Aug - 06 Sep British Airways direct
04 Aug - 11 Aug United
08 Aug - 18 Aug British Airways direct
07 Aug - 13 Aug British Airways direct
28 Aug - 04 Sep British Airways direct

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.

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