AirHint found the following cheapest return flights from New York (NYC) to Brussels (BRU) in September 2025 (see full year).

Return flights

23 Sep - 01 Oct	Iberia
25 Sep - 02 Oct	Icelandair
28 Sep - 05 Oct	Icelandair
04 Sep - 11 Sep	Icelandair
10 Sep - 17 Sep	Icelandair
21 Sep - 28 Sep	TAP
07 Sep - 17 Sep	Icelandair
11 Sep - 18 Sep	TAP
16 Sep - 23 Sep	TAP
17 Sep - 23 Sep	TAP
17 Sep - 24 Sep	TAP
18 Sep - 24 Sep	TAP
30 Sep - 03 Oct	Aer Lingus
10 Sep - 28 Sep	TAP
30 Sep - 03 Oct	United	direct

Also check the deals for one-way flights from New York to Brussels 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 New York to Brussels in September from 343€

Return flights