AirHint found the following cheapest return flights from Washington (IAD) to Mexico City (MEX) in January 2026 (see full year).

Return flights

23 Jan - 29 Jan	Frontier Airlines
15 Jan - 20 Jan	Frontier Airlines
30 Jan - 06 Feb	Frontier Airlines
30 Jan - 05 Feb	Frontier Airlines
23 Jan - 28 Jan	Frontier Airlines
17 Jan - 20 Jan	Frontier Airlines
09 Jan - 20 Feb	Breeze Airways
10 Jan - 15 Jan	Aeromexico
23 Jan - 26 Jan	Frontier Airlines
18 Jan - 24 Jan	Aeromexico
22 Jan - 29 Jan	Aeromexico
29 Jan - 02 Feb	Aeromexico
09 Jan - 20 Feb	United	direct
17 Jan - 21 Jan	Aeromexico
23 Jan - 29 Jan	Aeromexico	direct
29 Jan - 02 Feb	United	direct
29 Jan - 01 Feb	United	direct
30 Jan - 06 Feb	Aeromexico	direct

Also check the deals for one-way flights from Washington to Mexico City in January.

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.

Book a cheap hotel in Mexico City

Cheap car rent in Mexico City

Cheapest return flights from Washington to Mexico City in January from $365

Return flights