public boolean equals(Flight flight) {
		return this.identifier.equals(flight.identifier) &&
			   this.departureAirport.equals(flight.departureAirport) &&
			   this.departureTime.equals(flight.departureTime) &&
			   this.arrivalAirport.equals(flight.arrivalAirport) &&
			   this.arrivalTime.equals(flight.arrivalTime) &&
			   this.distance.equals(flight.distance);
	}