If you are all on the same booking, it will allocate you adjacent seats
.
Not necessarily so I'm afraid.
On our recent flight from Murcia, our party of five were allocated seats 40A - E. No problem, all seated together.
However, the husband of the lady seated in 40F was allocated 36C and there were numerous similar situations including a ridiculous situation with a family of three.
The wife was allocated seat 39C, the husband 39F and their 3 year old daughter 37B.
The family requested at check-in that their daughter be seated with either parent as it was their understanding that it was against CAA regulations to seat a minor away from a parent.
This request would only be granted on payment of £14. The family refused to pay on the grounds that they felt they were being held to ransom and intend to make a formal complaint directly with Jet2.
This particular problem was put to a member of the cabin crew on boarding but the situation was resolved by fellow passengers only too willing to help.
From the number of couples in particular who were seperated by many rows, it appears that the system needs some attention, unless of course as many commented, it deliberately splits couples by many rows in the hope of generating income by re-seating.