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

Return flights

22 Sep - 29 Sep	LATAM Airlines Group
16 Sep - 23 Sep	Delta
17 Sep - 24 Sep	Delta
15 Sep - 24 Sep	Delta
09 Sep - 29 Sep	Delta
28 Sep - 08 Oct	Delta
17 Sep - 30 Sep	LATAM Airlines Group
28 Sep - 16 Oct	Delta
27 Sep - 16 Oct	Delta
13 Sep - 21 Sep	Delta
17 Sep - 22 Sep	Delta
15 Sep - 22 Sep	Delta
15 Sep - 21 Sep	Delta
29 Sep - 09 Oct	LATAM Airlines Group
21 Sep - 09 Oct	Delta
26 Sep - 16 Oct	Delta

Also check the deals for one-way flights from Newark to Quito 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 Quito in September from 312€

Return flights