The popular app says you may have to invest in order to get a return.
This means that you may not get an upgrade immediately but you could spend a lot of money on one flight and be returned with a free or cheaper upgrade on your next flight.
A frequent Skyscanner user said: “My wife and I got upgraded when we moved here from the US on BA. Not sure why, but we think spending $ 1600 on baggage fees helped.”
Also sticking to flying with one airline may help the rewards rack up. Being loyal to a specific airline can be one of the most important pieces of advice when eating to receive any upgrades.
Product Manager David Low said: My wife and I were flying to the Dominican Republic. We’d got to Glasgow airport far too early but at least there was no queue.
“The check-in lady told us that they had two spare seats in first class, and since we were the first to arrive, we could have them for free.”
However, also being late for your flight could also bag you an upgrade. There is a fine line between being late and missing your flight so being early may be the best option.
If you are running late and haven’t reserved a seat, and the flight is overbooked you might be able to get an upgrade.
However many fliers may wish to spend the extra hours in the airport rather than potentially miss their flight.
Checking your emails is very important when flying. They will update you on the status of the flight but could also offer any upgrades there may be available.
These offers may come at a cost but will be much lower than the standard fare if a passenger is willing to pay some towards their upgrade.
This will still be a fraction of the price that a normal business or first class seat ticket comes at.