AirHint found the following cheapest return flights from Lyon (LYS) to Dublin (DUB) in September 2025 (see full year).

Return flights

24 Sep - 01 Oct	easyJet
20 Sep - 22 Sep	Aer Lingus
19 Sep - 22 Sep	Aer Lingus
29 Sep - 01 Oct	easyJet
24 Sep - 29 Sep	easyJet
13 Sep - 17 Sep	Aer Lingus
26 Sep - 29 Sep	Aer Lingus
19 Sep - 23 Sep	Aer Lingus
20 Sep - 23 Sep	Aer Lingus
13 Sep - 16 Sep	Aer Lingus
17 Sep - 21 Sep	Aer Lingus	direct
12 Sep - 14 Sep	Aer Lingus	direct
30 Sep - 03 Oct	easyJet
29 Sep - 03 Oct	easyJet
30 Sep - 03 Oct	Aer Lingus	direct
29 Sep - 05 Oct	easyJet
30 Sep - 02 Oct	easyJet
30 Sep - 02 Oct	Aer Lingus	direct

Also check the deals for one-way flights from Lyon to Dublin 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 Lyon to Dublin in September from $125

Return flights