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

Return flights

22 Aug - 24 Aug	Finnair	direct
15 Aug - 17 Aug	Finnair	direct
04 Aug - 28 Aug	TAP
14 Aug - 22 Aug	Aer Lingus
02 Aug - 27 Aug	Aer Lingus
03 Aug - 25 Aug	Aer Lingus
03 Aug - 27 Aug	Aer Lingus
18 Aug - 26 Aug	Norse Atlantic Airways
18 Aug - 25 Aug	Aer Lingus
22 Aug - 30 Aug	Aer Lingus
26 Aug - 17 Sep	Aer Lingus
26 Aug - 10 Sep	Aer Lingus
27 Aug - 02 Sep	Air Canada
25 Aug - 30 Sep	TAP
04 Aug - 12 Sep	TAP
21 Aug - 29 Sep	Air Canada
21 Aug - 21 Sep	Air Canada
16 Aug - 05 Sep	Aer Lingus
22 Aug - 13 Sep	Air Canada
21 Aug - 03 Sep	Air Canada

Also check the deals for one-way flights from New York 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 New York to London in August from $396

Return flights