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

Return flights

03 Aug - 02 Sep	Frontier Airlines
18 Aug - 31 Aug	Frontier Airlines
21 Aug - 26 Aug	Frontier Airlines
20 Aug - 27 Aug	Frontier Airlines
07 Aug - 17 Aug	Frontier Airlines
09 Aug - 24 Aug	Frontier Airlines
23 Aug - 31 Aug	Frontier Airlines
13 Aug - 18 Aug	Frontier Airlines
03 Aug - 12 Aug	Frontier Airlines
02 Aug - 09 Aug	Frontier Airlines
07 Aug - 09 Aug	Frontier Airlines

Also check the deals for one-way flights from Trenton 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 Trenton to London in August from $675

Return flights