Cheapest one-way IAD–CUN flights, May

AirHint found the following cheapest one-way flights from Washington (IAD) to Cancun (CUN) in May 2026 (see full year).

One-Way flights

25 May Aeromexico
30 May Aeromexico
30 May United direct
25 May United direct
23 May Aeromexico
20 May Southern Airways Express
21 May Southwest Airlines
20 May United direct
22 May United direct
23 May United direct

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

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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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