AirHint found the following cheapest return flights from Southampton (SOU) to Alicante (ALC) in September 2025 (see full year).

Return flights

18 Sep - 21 Sep	easyJet
22 Sep - 28 Sep	easyJet
01 Sep - 07 Sep	easyJet
08 Sep - 14 Sep	easyJet
18 Sep - 21 Sep	easyJet	direct
11 Sep - 14 Sep	easyJet
17 Sep - 21 Sep	easyJet
21 Sep - 28 Sep	easyJet	direct
18 Sep - 02 Oct	easyJet
03 Sep - 07 Sep	easyJet
28 Sep - 09 Oct	easyJet
19 Sep - 21 Sep	easyJet
28 Sep - 09 Oct	easyJet	direct
18 Sep - 02 Oct	easyJet	direct

Also check the deals for one-way flights from Southampton to Alicante 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 Southampton to Alicante in September from $151

Return flights