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

Return flights

22 Aug - 31 Aug	Icelandair
23 Aug - 31 Aug	United
21 Aug - 31 Aug	Icelandair
21 Aug - 24 Aug	SWISS
29 Aug - 01 Sep	Delta
17 Aug - 06 Sep	British Airways	direct
21 Aug - 24 Aug	British Airways	direct
23 Aug - 31 Aug	British Airways	direct
22 Aug - 31 Aug	British Airways	direct
16 Aug - 06 Sep	British Airways
16 Aug - 06 Sep	British Airways	direct
29 Aug - 01 Sep	British Airways	direct
28 Aug - 11 Sep	Delta

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

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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Cheapest return flights from Pittsburgh to London in August from 611€

Return flights