Chicago (ORD) to Mexico City (MEX): 1,689 miles (2,719 km) great-circle, about 3h 55m nonstop by our estimate. Cheapest fare observed: $161 round-trip on Viva Aerobus, nonstop, departing May 29, 2026.
$161 round-trip, Viva Aerobus VB187, departing 2026-05-29 at 01:20, returning 2026-06-07. The recorded itinerary left on a Friday, returning on a Sunday 9 nights later; the fare was observed 34 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $161, it ranked 5th of the 30 round-trip fares we recorded from ORD (median $221). That is 9.5 cents per great-circle mile (round-trip price over one-way distance), below the ORD median of 16.6 cents across 30 round-trip routes.
Routes from ORD of similar length: Seattle (1,716 mi) at $241 and Guadalajara (1,733 mi) at $199.
ORD to MEX is the only one of 30 ORD routes where Viva Aerobus priced cheapest. It is the 18th longest of the 30 routes we track from ORD.
Of 24 departure airports with a fare to Mexico City, Chicago (ORD) ranked 5th at $161. Lowest: $73 from Guadalajara (GDL); highest: $1375 from Addis Ababa (ADD); 13 nonstop. Cheapest-fare airlines (routes): Volaris (6), Viva Aerobus (5), Aeromexico (4), Arajet (2), Copa (1) and Ethiopian (1), plus 5 more.
The reverse, Mexico City (MEX) to Chicago (CHI), was $274 round-trip on United Airlines, 1 stop, departing May 21, 2026. Mexico City to Chicago flights.
That depends on your passport and trip, so check the official source for Mexico: Instituto Nacional de Migracion (Mexico). Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Chicago, America/Mexico_City; flight time is our estimate.