The metro is a convenient and economical way to get around Mexico City. The metro runs from 5 am to midnight on weekdays, 6 am to midnight on Saturdays, and 7 am to midnight on Sundays and holidays. The cost of a metro ticket is just 3 pesos, but the elderly, people who are physically impaired, and children under the age of 5 accompanied by an adult ride for free.
If you're planning on riding the Mexico City metro, print out this handy Mexico City metro map PDF file and take it with you. It will make easy for you to get around!