AirHint found the following cheapest return flights from Houston (IAH) to Rio De Janeiro (GIG) in September 2025 (see full year).

Return flights

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

Also check the deals for one-way flights from Houston to Rio De Janeiro 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 Rio De Janeiro in September from $598

Return flights