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

Return flights

21 Jul - 31 Jul	Frontier Airlines
31 Jul - 07 Aug	Frontier Airlines
14 Jul - 22 Jul	Frontier Airlines
08 Jul - 18 Jul	Frontier Airlines
10 Jul - 21 Jul	Frontier Airlines
11 Jul - 13 Jul	Frontier Airlines

Also check the deals for one-way flights from Trenton 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 Trenton to London in July from $1024

Return flights