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

Return flights

15 Oct - 29 Oct	United	direct
12 Oct - 17 Oct	United	direct
23 Oct - 27 Oct	Aeromexico
20 Oct - 26 Oct	Aeromexico
17 Oct - 21 Oct	American Airlines
11 Oct - 15 Oct	Aeromexico
25 Oct - 30 Oct	Aeromexico
18 Oct - 21 Oct	Aeromexico
12 Oct - 18 Oct	Aeromexico
12 Oct - 13 Oct	Aeromexico
29 Oct - 04 Nov	Aeromexico
29 Oct - 03 Nov	Aeromexico
30 Oct - 04 Nov	Frontier Airlines
30 Oct - 13 Nov	United	direct
31 Oct - 14 Nov	United	direct
24 Oct - 07 Nov	United
27 Oct - 10 Nov	United
25 Oct - 08 Nov	United	direct
26 Oct - 09 Nov	United
22 Oct - 05 Nov	United

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.

Book a cheap hotel in Cancun

Cheap car rent in Cancun

Cheapest return flights from Washington to Cancun in October from $249

Return flights