Flights are used in gross stroke-play tournaments so that golfers of similar skill levels are able to compete against one another for victory within their flight. A 15-handicapper, after all, will never win a gross tournament in which 2-handicappers are also playing. So the 2-handicappers play against one another in the Championship Flight, while the 15-handicappers are grouped in a different flight.
Often, a gross stroke-play tournament will flight its players and recognize champions within each flight, then also crown one overall net winner.

