AirHint found the following cheapest return flights from Chicago (ORD) to Cancun (CUN) in August 2025 (see full year).

Return flights

24 Aug - 26 Aug	Frontier Airlines	direct
19 Aug - 26 Aug	Frontier Airlines	direct
31 Aug - 06 Sep	Frontier Airlines	direct
15 Aug - 21 Aug	Frontier Airlines	direct
17 Aug - 21 Aug	Frontier Airlines	direct
16 Aug - 19 Aug	Frontier Airlines	direct
27 Aug - 30 Aug	Viva
12 Aug - 30 Aug	Viva
16 Aug - 30 Aug	Viva
13 Aug - 30 Aug	Viva
27 Aug - 06 Sep	Viva
16 Aug - 06 Sep	Viva
23 Aug - 30 Aug	Viva
27 Aug - 13 Sep	Viva
23 Aug - 06 Sep	Viva
19 Aug - 06 Sep	Spirit Airlines
23 Aug - 13 Sep	Viva
26 Aug - 06 Sep	Viva
26 Aug - 13 Sep	Viva
25 Aug - 06 Sep	Spirit Airlines	direct

Also check the deals for one-way flights from Chicago to Cancun in August.

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 Chicago to Cancun in August from 168€

Return flights