AirHint found the following cheapest return flights from Brasilia (BSB) to Cancun (CUN) in September 2025 (see full year).

Return flights

20 Sep - 27 Sep	Copa
02 Sep - 06 Sep	Copa
27 Sep - 04 Oct	Copa
27 Sep - 30 Sep	Copa
16 Sep - 23 Sep	Copa
19 Sep - 26 Sep	Copa
30 Sep - 04 Oct	Copa
27 Sep - 02 Oct	Copa
08 Sep - 15 Sep	GOL Linhas Aéreas
06 Sep - 12 Sep	Copa
05 Sep - 07 Sep	Copa
01 Sep - 07 Sep	Copa
02 Sep - 07 Sep	Copa

Also check the deals for one-way flights from Brasilia to Cancun 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 Brasilia to Cancun in September from 398€

Return flights