Stouffville line alone opens up a lot of trip possiblities if the last/first mile fares are waived.
Trips that cost $3.70: Kennedy to Milliken, Agincourt to Unionville, Milliken to Centennial, Milliken to Markham
On the Kitchener line, Bloor GO to Weston can replace Weston bus trips.
Bloor GO...