Metra train to Union Station, by the ATSorBlue and Orange Line trains to Midway Airport?

ATS→NCS · MetraMetra train to Union Station, by the ATS

From

ATS station at any terminal, for the free train to O'Hare Transfer station behind the Multi-Modal Facility

To

Chicago Union Station, for Amtrak and Metra trains, across the river from the Loop

Runs

06:13–16:41

Journey

50–52 min

Weekdays only: six trains a day towards the city, the last at 16:41 from O'Hare Transfer.

O'Hare Transfer station is behind the Multi-Modal Facility, on its northeast corner; the ATS takes up to 10 minutes from Terminal 1.

Metra train to Union Station, by the ATS: price for every party size

Blue→Orange · CTA (Chicago Transit Authority)Blue and Orange Line trains to Midway Airport

From

CTA O'Hare station, below the main parking garage, by walkway from Terminals 1, 2 and 3

To

Midway station, joined to the Midway Airport terminal by an enclosed walkway

Runs

03:10–00:45

Journey

67–68 min

Change at Clark/Lake, upstairs to the elevated platform, for an Orange Line train to Midway.

The airport asks you to allow up to two hours between O'Hare and Midway.

Blue and Orange Line trains to Midway Airport: price for every party size