[alexlrobertson]

I'm not sure where they got the price of $5 for the current CTA train to the airport.

http://www.rtachicago.org/index.php/plan-your-trip/travel-ti...

> CTA "L" train fare $2.50

More realistically there's a single-ride ticket for $3.

> Single-Ride Ventra Tickets cost $3, which provides up to 2 transfers within 2 hours

[Parker16]

The cost from any station to O'hare is $2.50. However, the cost from O'Hare to downtown is $5.00

https://www.transitchicago.com/fares/