$254 Cheap United flights Washington (IAD) to Mexico City (MEX)

View $254 flight on Tue, Oct 7, 2025Opens in a new window

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$254 Cheap United flights Washington (IAD) to Mexico City (MEX)

Prices were available within the past 7 days and start at $254 for one-way flights and $486 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Oct 7 - Thu, Oct 23
IAD
Washington
MEX
Mexico City
$486 Roundtrip, just found
$486
Roundtrip
just found
Select United flight, departing Tue, Oct 7 from Washington to Mexico City, returning Thu, Oct 23, priced at $486 just found
United
Mon, Nov 10 - Mon, Nov 17
IAD
Washington
MEX
Mexico City
$504 Roundtrip, found 21 hours ago
$504
Roundtrip
found 21 hours ago
Select United flight, departing Mon, Nov 10 from Washington to Mexico City, returning Mon, Nov 17, priced at $504 found 21 hours ago
United
Tue, Oct 21 - Thu, Oct 30
IAD
Washington
MEX
Mexico City
$505 Roundtrip, found 3 days ago
$505
Roundtrip
found 3 days ago
Select United flight, departing Tue, Oct 21 from Washington to Mexico City, returning Thu, Oct 30, priced at $505 found 3 days ago
United
Tue, Oct 7 - Thu, Oct 23
IAD
Washington
MEX
Mexico City
$512 Roundtrip, just found
$512
Roundtrip
just found
Select United flight, departing Tue, Oct 7 from Washington to Mexico City, returning Thu, Oct 23, priced at $512 just found
United
Mon, Nov 10 - Mon, Nov 17
IAD
Washington
MEX
Mexico City
$514 Roundtrip, found 21 hours ago
$514
Roundtrip
found 21 hours ago
Select United flight, departing Mon, Nov 10 from Washington to Mexico City, returning Mon, Nov 17, priced at $514 found 21 hours ago
Flights from Washington (IAD) to Mexico City (MEX)
Origin airport
Washington Dulles Intl.
Destination airport
Mexico City Intl.
Airlines serving
Aeromexico, Air Canada, American Airlines, Delta, Frontier Airlines, United, avianca
Popular airline
Aeromexico
Distance
1866 mi
Average flight time
2 hours 45 mins

Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to Mexico City Intl. Airport (MEX)?
You'll find cheap return United Airlines flights from $486 from IAD to MEX by organizing your results from "Price (lowest to highest)" on Expedia. Or look for options from $254 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.
What is the cheapest month to fly from IAD to MEX with United Airlines?
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.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to Mexico City Intl. Airport (MEX) with United Airlines?
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.
Does United Airlines fly nonstop from Washington Dulles Intl. Airport (IAD) to Mexico City Intl. Airport (MEX)?
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.
How long does it take to fly from IAD to MEX with United Airlines?
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.
What is the earliest United Airlines flight from IAD to MEX?
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.
What airports does United Airlines fly into in Mexico City?
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.
Why fly with United Airlines from IAD to MEX?
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.
What type of plane does United Airlines fly from Washington Dulles Intl. Airport (IAD) to Mexico City Intl. Airport (MEX)?
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.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to Mexico City Intl. Airport (MEX)?
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.

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