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

Return flights

29 Sep - 01 Oct	easyJet
29 Sep - 02 Oct	easyJet
24 Sep - 01 Oct	easyJet
22 Sep - 02 Oct	easyJet
27 Sep - 01 Oct	easyJet
29 Sep - 03 Oct	easyJet
23 Sep - 02 Oct	Aer Lingus
29 Sep - 04 Oct	easyJet
30 Sep - 02 Oct	Aer Lingus
28 Sep - 02 Oct	Aer Lingus
27 Sep - 29 Sep	easyJet
25 Sep - 29 Sep	easyJet
15 Sep - 29 Sep	easyJet
20 Sep - 24 Sep	easyJet
08 Sep - 10 Sep	easyJet
24 Sep - 28 Sep	easyJet
23 Sep - 26 Sep	Aer Lingus
23 Sep - 29 Sep	Aer Lingus
17 Sep - 25 Sep	easyJet
22 Sep - 25 Sep	easyJet

Also check the deals for one-way flights from Belfast 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 Belfast to Alicante in September from $141

Return flights