Ok so it's time to book our annual Thanksgiving trip. We have the choice of booking a seperate seat for our will-be 8 month old daughter at full price or having her on our lap. Now it's a 7 hour flight and she weighs 23lbs now (according to the chart, as much as an average 18 month old) so having to hold her or let her sleep on one of our chests the whole time could be wearing. On the other hand, it's almost £400
Anyone got experience of these things?