AirHint found the following cheapest return flights from Newark (EWR) to Antigua (ANU) in September 2025 (see full year).

Return flights

27 Sep - 04 Oct	United	direct
20 Sep - 27 Sep	United	direct
26 Sep - 28 Sep	Frontier Airlines
19 Sep - 24 Sep	Frontier Airlines
19 Sep - 26 Sep	Frontier Airlines
10 Sep - 13 Sep	Frontier Airlines
18 Sep - 22 Sep	Spirit Airlines
20 Sep - 24 Sep	Frontier Airlines
23 Sep - 30 Sep	Frontier Airlines
15 Sep - 17 Sep	Frontier Airlines
28 Sep - 04 Oct	Frontier Airlines

Also check the deals for one-way flights from Newark to Antigua 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 Newark to Antigua in September from 326€

Return flights