Cheapest return flights from Phoenix to London in September from $554

AirHint found the following cheapest return flights from Phoenix (PHX) to London (LGW) in September 2025 (see full year).

Return flights

08 Sep - 11 Sep Frontier Airlines
03 Sep - 07 Sep Delta
05 Sep - 19 Sep Frontier Airlines
02 Sep - 16 Sep American Airlines
22 Sep - 30 Sep American Airlines
02 Sep - 09 Sep Air Canada
07 Sep - 14 Sep Frontier Airlines
05 Sep - 15 Sep Spirit Airlines
01 Sep - 04 Sep Frontier Airlines
01 Sep - 09 Sep Spirit Airlines
21 Sep - 05 Oct Icelandair
14 Sep - 01 Oct SWISS
26 Sep - 06 Oct Air Canada

Also check the deals for one-way flights from Phoenix to London in September.

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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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