Yes your arrival flight number is important information for the car rental company if you are collecting a vehicle from an airport.
If you experience a flight delay and the rental company is aware of your flight details, they are more likely to hold the vehicle for you. Without arrival flight details in your reservation and if you haven’t collected the vehicle at the booked time, they may treat your reservation as a ‘no-show’ and release the vehicle to another customer.
If no flight details are entered into your reservation, we cannot guarantee the rental car supplier will hold the vehicle for you, especially during busy holiday periods.