AirHint found the following cheapest return flights from Newark (EWR) to London (LGW) in July 2025 (see full year).

Return flights

27 Jul - 24 Aug	Spirit Airlines
29 Jul - 05 Aug	Icelandair
29 Jul - 06 Aug	Icelandair
22 Jul - 30 Jul	Icelandair
29 Jul - 10 Aug	Air Canada
31 Jul - 30 Aug	Spirit Airlines
14 Jul - 30 Jul	Icelandair
16 Jul - 30 Jul	Icelandair
16 Jul - 29 Jul	Icelandair
29 Jul - 22 Aug	Spirit Airlines
16 Jul - 28 Jul	Icelandair
22 Jul - 29 Jul	Icelandair
11 Jul - 16 Jul	Air Canada
17 Jul - 30 Jul	Icelandair
17 Jul - 29 Jul	Icelandair
22 Jul - 05 Aug	Icelandair
22 Jul - 28 Jul	Icelandair
14 Jul - 15 Aug	Icelandair
23 Jul - 20 Aug	Spirit Airlines
14 Jul - 06 Aug	Icelandair

Also check the deals for one-way flights from Newark to London in July.

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 Newark to London in July from 427€

Return flights