Few pointers
- What time of plane ride do you intend to take? After two experience, for 14month, you can consider night flights.
- Prepare lots of snack and toys to entertain them.
Don't take all out at once. Take the toys out one at a time to slowly distract them.
But personal experience. usually they will sleep on flight.Not immediately, but they WILL sleep.
For me, i will prep ipad too.