You might expect a hefty fee to switch an airline ticket to a different person as airlines have to submit a passenger manifest before departure but you may be surprised to be hit with equally high fees to amend a simple typo.
You could be looking at fees in excess of £100, with fees varying widely between different airlines. This could be especially galling if you managed to bag a great deal, particularly as some firms charge a flat fee plus the price difference between the day you booked your flight and the day you amend it.
Filling in forms online is often a tedious business, especially on a smart phone, but booking a flight may be the time to turn off the auto-fill feature and double check every entry before you hit confirm. If you realise you’ve made mistake quick enough, some firms do offer a 24 hour grace period.