$273 Cheap United flights Washington (IAD) to Mexico City (MEX)

You’ll find cheap return United Airlines flights from $465 from IAD to MEX by organizing your results from “Price (lowest to highest)” on Expedia. Or look for options from $273 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.

January is one of the cheapest months to fly to Mexico City with United Airlines. You could also find excellent prices on return and one-way tickets in September.

Landing the best United Airlines deals from IAD to MEX often comes down to timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. Better still, you can pocket 17% on average by buying your fare on a Sunday compared to a Friday, which is often the most expensive day to book.* It’s smart to kick off your flight search about one month before you plan to travel.*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.

United Airlines offers direct flights from Washington Dulles Intl. Airport (IAD) to Mexico City Intl. Airport (MEX), with 7 departures each week. Simply select the “Nonstop” and “Airline” filters during your search on Expedia to show all direct United Airlines flights to MEX.

The journey time for a direct United Airlines flight from Washington Dulles Intl. Airport (IAD) to Mexico City Intl. Airport (MEX) takes approximately 5h 10m.

The first flight from IAD to MEX with United Airlines leaves at 5:40PM UTC-5. You’ll touch down at 9:50PM UTC-6. The final United Airlines flight of the day takes off at 5:40PM UTC-5 and arrives at 9:50PM UTC-6. With around 20% fewer cancellations for morning and mid-morning departures, setting off early is often the wisest option.**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.

Board a United Airlines flight from Washington Dulles Intl. Airport (IAD) to Mexico City, and you’ll most likely arrive at Mexico City Intl. Airport (MEX). This is the airline’s main hub in this city.

Depart from IAD to MEX with United Airlines and you’ll enjoy a range of perks starting with a rewarding loyalty program. When booking through Expedia as a United Mileage Plus and One Key™ member, you could also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Chances are you’ll be flying on an Airbus A320 for your United Airlines flight from Washington Dulles Intl. Airport (IAD) to Mexico City Intl. Airport (MEX). However, you could be switched to another aircraft for operational reasons.

Typically, you can cancel or reschedule your flight, although there may be additional fees if your booking was made over 24 hours ago. Prefer to keep your options open? Make use of our “Changes included” or “No cancel fee” filter to find flights that won’t charge extra if you need to alter your plans. To modify your itinerary, go to “Trips,” select your flight and click on “Manage Booking” for more information.