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

Return flights

27 Aug - 30 Sep	SWISS
27 Aug - 19 Sep	SWISS
30 Aug - 15 Sep	Aer Lingus
29 Aug - 14 Sep	Aer Lingus
28 Aug - 11 Sep	Aer Lingus
29 Aug - 15 Sep	Aer Lingus
25 Aug - 06 Sep	Aer Lingus
29 Aug - 31 Aug	Aer Lingus
28 Aug - 31 Aug	Aer Lingus
20 Aug - 02 Sep	Aer Lingus
30 Aug - 02 Sep	Aer Lingus
29 Aug - 06 Sep	Aer Lingus
25 Aug - 30 Aug	Aer Lingus
20 Aug - 29 Aug	Aer Lingus
25 Aug - 31 Aug	Aer Lingus
28 Aug - 30 Aug	Aer Lingus
20 Aug - 31 Aug	Aer Lingus
27 Aug - 29 Aug	Aer Lingus
20 Aug - 26 Aug	Aer Lingus
13 Aug - 31 Aug	Aer Lingus

Also check the deals for one-way flights from London to New York 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 London to New York in August from 369€

Return flights