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

Return flights

18 Sep - 24 Sep	Spirit Airlines
01 Sep - 15 Sep	Spirit Airlines
15 Sep - 29 Sep	United	direct
01 Sep - 15 Sep	United	direct
02 Sep - 16 Sep	United	direct
04 Sep - 18 Sep	United	direct
08 Sep - 22 Sep	United	direct
09 Sep - 23 Sep	United	direct
17 Sep - 01 Oct	United	direct
22 Sep - 06 Oct	United	direct
23 Sep - 07 Oct	United	direct
25 Sep - 09 Oct	United	direct
30 Sep - 14 Oct	United
29 Sep - 13 Oct	United	direct
13 Sep - 21 Sep	United	direct
13 Sep - 27 Sep	United	direct
20 Sep - 04 Oct	United	direct
26 Sep - 10 Oct	United	direct
21 Sep - 05 Oct	United	direct
28 Sep - 12 Oct	United	direct

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 $818

Return flights