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

Return flights

21 Sep - 12 Oct	easyJet	direct
21 Sep - 05 Oct	easyJet	direct
21 Sep - 28 Sep	easyJet	direct
21 Sep - 02 Oct	easyJet	direct
29 Sep - 03 Oct	easyJet
22 Sep - 25 Sep	easyJet
22 Sep - 29 Sep	easyJet
25 Sep - 12 Oct	easyJet	direct
22 Sep - 26 Sep	easyJet
21 Sep - 25 Sep	easyJet	direct
21 Sep - 16 Oct	easyJet	direct
29 Sep - 04 Oct	easyJet
22 Sep - 24 Sep	easyJet
24 Sep - 28 Sep	Aer Lingus
19 Sep - 21 Sep	easyJet
25 Sep - 05 Oct	easyJet	direct
27 Sep - 02 Oct	easyJet
21 Sep - 09 Oct	easyJet	direct
25 Sep - 28 Sep	easyJet
23 Sep - 28 Sep	TUI

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 $170

Return flights