Both terminals have free Wi-Fi, part of Mexico City's public internet program. Guides in 2026 give the network name as Gratis_CDMX_Aeropuerto; pick it and accept the terms on the page that opens. No password or account is needed, and no session limit is published, though it may ask you to sign in again after a while. It covers the boarding areas, corridors and food courts of Terminal 1 and Terminal 2.
Speeds drop when several long-haul flights land together. It is fine for a message or a map; for a video call or a long download, use your own data.
