Cheapest one-way flights from Washington to Cancun in September from $124

AirHint found the following cheapest one-way flights from Washington (IAD) to Cancun (CUN) in September 2025 (see full year).

One-Way flights

06 Sep Aeromexico
13 Sep Aeromexico
27 Sep Aeromexico
27 Sep United direct
01 Sep Aeromexico
22 Sep Frontier Airlines
14 Sep Frontier Airlines
19 Sep American Airlines
12 Sep Frontier Airlines
07 Sep Frontier Airlines

Also check the deals for return flights from Washington to Cancun in September.

Skyscanner

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

Feel free to contact us with any feedback or request another flight research.