OK, it’s been a while but I did 14 hours with 6 month old twins and then a connector flight. I have done at least 10 trans pacific flights with either one or three of my girls.
First, make sure you are squared away so you don’t have to worry about yourself on the flight. Comfortable clothes, snacks and all that. Make sure you’re well rested in case you spend the entire transit time dealing with it.
Second, if your child uses a soother, have several back ups that you can “quick draw”.
Third, have too many diapers and changes of clothes ready. And I mean quick draw ready if you’re taking off or there is turbulence and you have a “code brown” or worse to deal with. Me, I wore cargo pants, hand a bunch of diapers and soothers and at least one onesie stashed in various pockets, .
Fourth, same thing with formula if you’re using formula. Have a bunch of bottles with the powder pre measured. Bring bottled water. The plane will have boiling water, so have a general idea for how much boiling water + room temperature bottled water ends up with something your kids will drink. Ditto if he/she is eating anything like soda crackers. Order the infant meal in advance but prepare all you will need within arms reach as well.
Fifth, if you want to use an anti histamine such a Benadryl, test it out a week or so before. Some kids like mine took Benadryl and went straight to sleep and then about 3 months later acted like they had snorted about 6 lines of coke and 6 months later were back to sleeping after a dose. YMMV. Test it first.
Sixth, do NOT try the sleep deprivation trick as it could backfire horribly. Stay on schedule as much as possible. kids like schedule.
SEventh, airlines might take pity on you and give you access to the business lounge or keep an empty seat next to you. Just ask politely.
Eighth, the bassinets only work in the bulkhead seats in my experience. If you have a bassinet, then you should be in the bulkhead. The bassinet attaches to the bulkhead. Definitely order this in advance. 9 months is probably kinda old for a bassinet. The bassinets are not real big and have a weight limit, but if your child fits in and can sleep, its awesome. There are straps with Velcro so junior can’t go flying around the cabin with turbulence.
Ninth, I highly recommend baby bjorn or similar kangaroo carrier. I did one flight with one twin in the carrier almost the entire 14 hours. Strap em in and then walk the aisles of the plane.
Tenth, do your best to minimize annoying other passengers by taking care of your child. If your are are proactive, most other passengers really don’t care if your kiddo cries for an hour. If they do, seriously take a deep breath, “We’re doing the best we can and I ask your understanding” while under your breath say “fuck off and die loser”. There is NO need to feel like you have to buy drinks or give everyone ear plugs. Kids are part of flying, other passengers need to deal with it. That said, it is waaaaaay annoying when parents do not appear to be doing everything they can to help their kiddos. And don’t bitch in a loud voice how you’ll “never fly economy again” or other self centered bullshit. Just do your best to help your child, and that helps everyone.
I apologized many times to folks that sympathized and said “they are so much better than mine were…”. Don’t sweat that piece.
Tenth, if your son likes a tablet with cartoons, bring it. Along with some favorite toys and ANTHING that helps keep him a happy bunny. Again, I wore clothes with tons of pockets and stored stuff everywhere within reach. As well as the kid bag in arms reach with 3x more than what was needed.
Eleventh, bring standard meds like Tylenol that you might use on the flight. Nothing like 1 hour into a 9 hour flight and discovering Junior feels “really hot” to the touch.
I’m sure there is more but this pretty much covers it. Hopefully it will go smoothly, and just make sure you’re ready in case satan’s spawn decides to show up and throw up for 9 hours. You’ll do fine.