$191 Cheap American Airlines flights Washington (IAD) to Cancun (CUN)

You’ll discover cheap round-trip American Airlines flights from $411 from IAD to CUN by filtering your results from “Price (lowest to highest)” on Expedia. Or search for deals from $191 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

October is one of the most affordable months to jet off to Cancun with American Airlines. You could also find great prices on one-way and round-trip tickets in September.

Check for American Airlines flights from IAD to CUN about one month before you want to go. The most affordable time to reserve an international flight is usually 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. No matter your itinerary or fare class, the best day to book international airfare is usually Sunday. Friday can be the most expensive. Travelers booking on a Sunday can save an average of 17% compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Use our “Nonstop” filter when browsing for direct American Airlines flights from IAD to CUN. It’s also an easy way to compare other carriers offering the same nonstop journey.

To find the earliest departure from IAD to CUN with American Airlines, sort your results by “Early Morning” and “Morning.” Choosing an early flight generally means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

American Airlines flights from Washington Dulles Intl. Airport (IAD) to Cancun land at Cancun Intl. Airport (CUN). This is the main entry point to this destination.

Changes are typically free within 24 hours of making a booking, but your airline may add a charge after that time. For further details about altering your flights, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to adjust your plans without additional charges, apply the “No cancel fee” or “Changes included” filter when planning your next getaway.