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

Return flights

10 Sep - 13 Sep	easyJet
04 Sep - 11 Sep	easyJet
08 Sep - 18 Sep	easyJet
03 Sep - 06 Sep	easyJet
01 Sep - 04 Sep	easyJet
25 Sep - 26 Sep	easyJet
10 Sep - 12 Sep	easyJet
08 Sep - 09 Sep	easyJet
30 Sep - 04 Oct	easyJet
15 Sep - 22 Sep	easyJet
11 Sep - 14 Sep	easyJet
30 Sep - 04 Oct	KLM	direct
29 Sep - 01 Oct	easyJet
25 Sep - 08 Oct	KLM	direct
22 Sep - 05 Oct	easyJet
29 Sep - 01 Oct	KLM	direct
28 Sep - 01 Oct	KLM	direct
22 Sep - 05 Oct	KLM	direct

Also check the deals for one-way flights from Belfast to Amsterdam 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 Amsterdam in September from 151€

Return flights