found this on VA website:
*A flight is a trip with a single flight number. If you have to change aircraft but your flight number doesn't change, it is considered the same flight. If your flight number changes during your journey, even if you continue on the same aircraft, it will be considered two flights.
source: How It Works | Velocity Rewards
*A flight is a trip with a single flight number. If you have to change aircraft but your flight number doesn't change, it is considered the same flight. If your flight number changes during your journey, even if you continue on the same aircraft, it will be considered two flights.
source: How It Works | Velocity Rewards