AirHint found the following cheapest return flights from Washington (IAD) to Cancun (CUN) in October 2025 (see full year).

Return flights

31 Oct - 06 Nov	Frontier Airlines
31 Oct - 14 Nov	Frontier Airlines
25 Oct - 29 Oct	Aeromexico
25 Oct - 28 Oct	United
28 Oct - 04 Nov	Frontier Airlines
23 Oct - 01 Nov	Frontier Airlines
30 Oct - 06 Nov	Frontier Airlines
28 Oct - 11 Nov	Aeromexico
28 Oct - 31 Oct	Delta
24 Oct - 27 Oct	Aeromexico
30 Oct - 03 Nov	Frontier Airlines
27 Oct - 30 Oct	United	direct
31 Oct - 06 Nov	United	direct
31 Oct - 14 Nov	United	direct
31 Oct - 05 Nov	United	direct
23 Oct - 27 Oct	United
23 Oct - 25 Oct	United
22 Oct - 25 Oct	Frontier Airlines
23 Oct - 30 Oct	Frontier Airlines
24 Oct - 27 Oct	United	direct

Also check the deals for one-way flights from Washington to Cancun in October.

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 Washington to Cancun in October from 269€

Return flights