- Oak Park to Quest Williamstown
- Oaklands Junction to Quest Williamstown
- Oakleigh East to Quest Williamstown
- Oakleigh South to Quest Williamstown
- Oakleigh to Quest Williamstown
- Ocean Grove to Quest Williamstown
- Officer to Quest Williamstown
- Olinda to Quest Williamstown
- Ormond to Quest Williamstown
- Melbourne Airport to Quest Williamstown
- Quest Williamstown to Oak Park
- Quest Williamstown to Oaklands Junction
- Quest Williamstown to Oakleigh East
- Quest Williamstown to Oakleigh South
- Quest Williamstown to Oakleigh
- Quest Williamstown to Ocean Grove
- Quest Williamstown to Officer
- Quest Williamstown to Olinda
- Quest Williamstown to Ormond
- Quest Williamstown to Melbourne Airport