Cheapest return flights from Phoenix to London in September from $650

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

Return flights

26 Sep - 06 Oct Frontier Airlines
30 Sep - 02 Oct Frontier Airlines
29 Sep - 06 Oct Frontier Airlines
22 Sep - 27 Sep Frontier Airlines
29 Sep - 04 Oct Frontier Airlines
30 Sep - 11 Oct Frontier Airlines
24 Sep - 28 Sep Frontier Airlines
29 Sep - 10 Oct Frontier Airlines
26 Sep - 12 Oct Frontier Airlines
19 Sep - 02 Oct Frontier Airlines
22 Sep - 02 Oct Frontier Airlines
22 Sep - 08 Oct Frontier Airlines
19 Sep - 25 Sep Frontier Airlines
21 Sep - 28 Sep Frontier Airlines
22 Sep - 29 Sep Frontier Airlines
20 Sep - 29 Sep Frontier Airlines
20 Sep - 30 Sep Frontier Airlines
23 Sep - 30 Sep Frontier Airlines
21 Sep - 23 Sep Frontier Airlines
25 Sep - 30 Sep Icelandair

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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