Mexico City (MEX) to Chicago (CHI): 1,689 miles (2,719 km) great-circle, about 3h 55m nonstop by our estimate. Cheapest fare observed: $274 round-trip on United Airlines, with 1 stop, departing May 21, 2026.
$274 round-trip, United Airlines UA784, departing 2026-05-21 at 08:05, returning 2026-05-27. The recorded itinerary left on a Thursday, returning on a Wednesday 6 nights later; the fare was observed 26 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $274, it ranked 13th of the 30 round-trip fares we recorded from MEX (median $329). That is 16.2 cents per great-circle mile (round-trip price over one-way distance), below the MEX median of 18.3 cents across 30 round-trip routes.
Routes from MEX of similar length: Los Angeles (1,554 mi) at $291 and Tijuana (1,430 mi) at $183.
United Airlines had the cheapest fare on 3 of 30 MEX routes. It is the 15th longest of the 30 routes we track from MEX.
Of 33 departure airports with a fare to Chicago, Mexico City (MEX) ranked 25th at $274. Lowest: $89 from Atlanta (ATL); highest: $1241 from Nairobi (NBO); 16 nonstop. Cheapest-fare airlines (routes): Frontier (15), Spirit (5), United Airlines (4), American Airlines (2), airline 0O (1) and Alaska Airlines (1), plus 5 more.
That depends on your passport and trip, so check the official source for United States: U.S. Customs and Border Protection: international visitors. 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/Mexico_City, America/Chicago; flight time is our estimate.