 This charge is in place to ensure the driver still makes money if the cab is stuck in bad traffic.There is a flat fee of $1.00 for the first additional passenger and another $.50 for each additional passenger after that unless the passenger is under 12 or over 65 years of age.An additional charge of $4.00 is added to the total fare on each trip from O'Hare or Midway airports under the State of Illinois Metropolitan Pier and Exposition Authority (MPEA) Airport Departure Ordinance.