UP Express service modified Started Until Fri Mar 6 Pearson Airport customers: GO shuttle buses are operating between Union Station and Pearson Airport due to unplanned track work.UP Express service will run between Union Station and Weston Station making all station stops.Customers are also encouraged to take the TTC route 900 from Kipling TTC Station. For customers travelling to Pearson Airport: At Union Station, the express buses will pick up and drop off customers from a temporary stop on Station Street (outside Goodlife Fitness). The temporary stop is located on the corner of Station Street and York Street. UP Express Station Ambassadors are on site if you require further assistance.