AirHint found the following cheapest return flights from Oakland (OAK) to London (LHR) in September 2025 (see full year).

Return flights

28 Sep - 29 Oct	Delta
21 Sep - 29 Sep	Spirit Airlines
11 Sep - 22 Sep	Delta
24 Sep - 29 Sep	Hawaiian Airlines
09 Sep - 14 Oct	Icelandair
10 Sep - 13 Oct	Icelandair
24 Sep - 06 Oct	Alaska Airlines
24 Sep - 07 Oct	Icelandair
24 Sep - 03 Oct	Icelandair
08 Sep - 29 Sep	Icelandair
30 Sep - 05 Oct	Icelandair
30 Sep - 10 Oct	Icelandair
15 Sep - 24 Sep	Icelandair
01 Sep - 17 Sep	Icelandair
01 Sep - 18 Sep	Icelandair
01 Sep - 08 Sep	Icelandair
11 Sep - 03 Oct	Icelandair
13 Sep - 28 Sep	Icelandair
26 Sep - 13 Oct	Icelandair
12 Sep - 22 Sep	Icelandair

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

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 Oakland to London in September from $547

Return flights