My wife and I will be traveling with our 9-months baby with United Airlines (Montreal-Washington-Beijing). However, when we purchased the tickets online, there are only back seats available (last 3 back rows in B777) to choose. I called United Customer Care Centre, they said that they can do nothing for the seating except that we pay extra 149$ per person to get Economy Plus class seats.

I wonder if the airport check-in agent or flight attendant could find 2 front seats for us on the day of departure. I have heard that basically, airlines agents will put passengers with baby in front seats. We really worried that we will fly with our baby in the back of aircraft for 14 hours.