When flying with another person book your seats with an empty one in the middle (ie select aisle and window). People don’t like to be wedged between others, so often the dreaded middle seat will remain empty.
If this hack does not work, then ask to swap and they’ll probably be more than happy to be relieved from middle seat duty.
For those travelling solo, pick a seat that will create a space between you and another traveller. So if you can see someone’s already got the window seat pick the aisle one.
There are a few factors that can increase the chances for an upgrade. For one, choose a plane with a higher percentage of first class seats such as Boeing 777-300 and avoid peak hour business flights – midday flights on Tuesdays, Wednesday and Saturdays are the best ones.
This article originally appeared on 7travel.com.au.