| 1 | Mazda GP of St. Petersburg-1 | 3/28/15 | Streets of St. Petersburg | 5 | 3 |
| 2 | Mazda GP of St. Petersburg-2 | 3/29/15 | Streets of St. Petersburg | 5 | 3 |
| 3 | GP Long Beach Pres. By Allied Building Prod | 4/19/15 | Streets of Long Beach | 2 | 2 |
| 4 | Legacy Indy Lights 100-1 | 4/25/15 | Barber Motorsports Park | 1 | 1 |
| 5 | Legacy Indy Lights 100-2 | 4/26/15 | Barber Motorsports Park | 1 | 1 |
| 6 | Mazda GP of Indianapolis-1 | 5/8/15 | Indianapolis Motor Speedway (RC) | 6 | 7 |
| 7 | Mazda GP of Indianapolis-2 | 5/9/15 | Indianapolis Motor Speedway (RC) | 12 | 12R |
| 8 | Freedom 100 Pres. by Allied Building Products | 5/22/15 | Indianapolis Motor Speedway | 10 | 9 |
| 9 | Cooper Tires GP of Toronto-1 | 6/13/15 | Exhibition Place, Toronto | 3 | 1 |
| 10 | Cooper Tires GP of Toronto-2 | 6/14/15 | Exhibition Place, Toronto | 1 | 1 |
| 11 | Grand Prix of Milwaukee | 7/12/15 | The Milwaukee Mile | 1 | 7 |
| 12 | Indy Lights Iowa 100 | 7/18/15 | Iowa Speedway | 9 | 8 |
| 13 | Cooper Tires GP of Mid-Ohio-1 | 8/1/15 | Mid-Ohio Sports Car Course | 3 | 8 |
| 14 | Cooper Tires GP of Mid-Ohio-2 | 8/2/15 | Mid-Ohio Sports Car Course | 7 | 3 |
| 15 | Indy Lights GP Presented By Cooper Tires - 1 | 9/12/15 | Laguna Seca Raceway | 3 | 1 |
| 16 | Indy Lights GP Presented By Cooper Tires - 2 | 9/13/15 | Laguna Seca Raceway | 2 | 1 |