Has anyone booked a package holiday and been able to buy a separate seat on the plane for an under 2? I cannot think of anything worse than trying to contain my 18 month old on our laps during a flight - it was fine when he was smaller but not now. I'd really like to buy an extra seat so that we have the whole row to ourselves and don't annoy whoever the unlucky third person in our row would be otherwise. Does anyone have any experience of any package holiday providers like Jet2 or Tui allowing this?