It also means passengers will have time to relax at the airport and won’t be in a rush to get to their flight.
Jacob said: “Travel during peak times. If a flight is empty, there is no need to offer an upgrade.
“Airlines are more likely to offer upgrades when the flight is full or close to capacity.
“This means that you’re more likely to get an upgrade if you travel during peak times, such as school holidays or weekends.