Philadelphia (PHL) to Mexico City (MEX): 1,998 miles (3,215 km) great-circle, about 4h 30m nonstop by our estimate. Cheapest fare observed: $337 round-trip on Frontier, with 1 stop, departing May 12, 2026.
$337 round-trip, Frontier F92858, departing 2026-05-12 at 10:11, returning 2026-06-17. The recorded itinerary left on a Tuesday, returning on a Wednesday 36 nights later; the fare was observed 17 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $337, it ranked 20th of the 30 round-trip fares we recorded from PHL (median $234). That is 16.9 cents per great-circle mile (round-trip price over one-way distance), below the PHL median of 21.3 cents across 30 round-trip routes.
Routes from PHL of similar length: Leon (2,022 mi) at $371 and Las Vegas (2,171 mi) at $122.
Frontier had the cheapest fare on 19 of 30 PHL routes. It is the 9th longest of the 30 routes we track from PHL.
Of 24 departure airports with a fare to Mexico City, Philadelphia (PHL) ranked 12th at $337. 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.
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/New_York, America/Mexico_City; flight time is our estimate.