A travel expert named Janelle gave advice on booking airliner seats to make traveling as comfortable as possible. Her words are quoted by The Sun.
The expert explained that even if you are traveling together, you should not book adjacent places. It is better, in her opinion, to choose chairs by the window and by the aisle.
Janelle noted that, as a rule, no one wants to sit in the middle. Accordingly, if there is an incomplete load on the plane, then there is a high chance that you will get a whole free row of seats.
If all the seats in the cabin of the airliner still turn out to be occupied, there is always the opportunity to exchange with a fellow traveler and sit next to your other half or friend.