$310 Cheap United flights Mexico City (MEX) to Washington (IAD)

View $310 flight on Sat, Dec 20, 2025Opens in a new window

$310 Cheap United flights Mexico City (MEX) to Washington (IAD)

Prices were available within the past 7 days and start at $310 for one-way flights and $517 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Dec 24 - Wed, Jan 7
MEX
Mexico City
IAD
Washington
$517 Roundtrip, found 1 hour ago
$517
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Dec 24 from Mexico City to Washington, returning Wed, Jan 7, priced at $517 found 1 hour ago
Flights from Mexico City (MEX) to Washington (IAD)
Origin airport
Mexico City Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Aeromexico, Air Canada, American Airlines, Delta, Frontier Airlines, United, avianca
Popular airline
Aeromexico
Distance
1866 mi
Average flight time
6 hours 34 mins

Frequently asked questions

How much is a United Airlines flight from Mexico City Intl. Airport (MEX) to Washington Dulles Intl. Airport (IAD)?
You can discover budget-friendly return United Airlines flights from $517 from MEX to IAD by sorting your results from "Price (lowest to highest)" on Expedia. Or search for bargains from $310 for a one-way journey.**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.
What is the cheapest month to fly from MEX to IAD with United Airlines?
United Airlines flights to Washington are generally cheaper in the quieter months of January and February. Whether you're after a return or one-way ticket, you could land a better deal then.
What is the cheapest time to book flights from Mexico City Intl. Airport (MEX) to Washington Dulles Intl. Airport (IAD) with United Airlines?
To find cheap flights from MEX to IAD with United Airlines, begin your search about one month before your planned departure. You can save 17% when you book your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another useful tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**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.
Does United Airlines fly nonstop from Mexico City Intl. Airport (MEX) to Washington Dulles Intl. Airport (IAD)?
United Airlines operates direct flights from Mexico City Intl. Airport (MEX) to Washington Dulles Intl. Airport (IAD), with 7 departures each week. Simply apply the "Nonstop" and "Airline" filters during your search on Expedia to see all direct United Airlines flights to IAD.
How long does it take to fly from MEX to IAD with United Airlines?
Leave Mexico City Intl. Airport (MEX) for Washington Dulles Intl. Airport (IAD) on a nonstop United Airlines flight, and you'll be airborne for around 4h 10m.
What is the earliest United Airlines flight from MEX to IAD?
Taking off from MEX at 9:40AM UTC-6, the earliest United Airlines flight to IAD lands at 2:50PM UTC-5. Traveling early means you'll be less likely to encounter delays.* Don't like early starts? The last United Airlines flight from MEX to IAD departs at 9:40AM UTC-6 and touches down at 2:50PM UTC-5.*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.
What airports does United Airlines fly into in Washington?
Hop on a United Airlines flight from Mexico City Intl. Airport (MEX) to Washington, and you'll probably arrive at Washington Dulles Intl. Airport (IAD). This is the airline's main hub in this destination.
Why fly with United Airlines from MEX to IAD?
With a rewarding loyalty program, United Airlines is a popular choice for many passengers departing from MEX to IAD. Plus, if you're a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Mexico City Intl. Airport (MEX) to Washington Dulles Intl. Airport (IAD)?
Set off on a United Airlines flight from Mexico City Intl. Airport (MEX) to Washington Dulles Intl. Airport (IAD), and you'll probably board an Airbus A320. Bear in mind though, that the aircraft type can vary due to operational requirements.
Can I change or cancel my United Airlines flight from Mexico City Intl. Airport (MEX) to Washington Dulles Intl. Airport (IAD)?
Depending on your fare type, a fee typically applies if you change or cancel your flight more than 24 hours after it's been confirmed. To find tickets with more flexibility, select our "Changes included" and "No cancel fee" boxes when you search for flights. To learn more about changing or canceling your reservation, go to "Trips," select your flight and tick "Manage Booking."

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*Available to One Key members.