AirHint found the following cheapest return flights from Houston (IAH) to Buenos Aires (EZE) in September 2025 (see full year).

Return flights

16 Sep - 23 Sep	Spirit Airlines
09 Sep - 25 Sep	Spirit Airlines
16 Sep - 30 Sep	Spirit Airlines
19 Sep - 30 Sep	Spirit Airlines
15 Sep - 20 Sep	Spirit Airlines
15 Sep - 26 Sep	Spirit Airlines
29 Sep - 06 Oct	Spirit Airlines
19 Sep - 04 Oct	Spirit Airlines
27 Sep - 04 Oct	Spirit Airlines
18 Sep - 20 Sep	Frontier Airlines
29 Sep - 06 Oct	United	direct
27 Sep - 04 Oct	United	direct
19 Sep - 04 Oct	United	direct
16 Sep - 23 Sep	United	direct
16 Sep - 30 Sep	United	direct
15 Sep - 30 Sep	Delta

Also check the deals for one-way flights from Houston to Buenos Aires 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 Houston to Buenos Aires in September from 675€

Return flights