@CharXo the fab thing about nutramigen is it's made with room temperature water so that's one headache sorted! Yes can take a tin, I do recommend a dispenser as well so not having to measure out scoops with all the other travelling palaver.
You can take just the powder and water separately, we took 3 bottles with sterile water in for a 3.5h flight so bit overkill haha but did have a 3+h delay once so was grateful for it! You can take a sippy cup/beaker as well, just say it's sterile water haha.
Do you have a sling? I just kept a soft stretchy one on the whole time so can pop baby in and out as needed.
Typically you can either check the pram at start or you hand it over at the gate/plane. We fly Ryan Air so board plane via outside stairs rather than the direct tunnels. They take the pram off you on the ground in that case (the luggage boarding people tend to come over when they see the pram). If you aren't checking it at the start then make sure to ask for a luggage tag for the pram for when hand it over later. If the airline uses self check in/baggage drop off you need to get the wandering supervisor person to print this off, also for car seat if needed. If taking a car seat to check in then allow extra travel time as need to take to oversized luggage to drop off, same if checking in pram I assume.
As travelling on Sunday, if you have Amazon prime/pay for speedy delivery then I recommend:
https://www.amazon.co.uk/gp/product/B000RRD7UG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
(for car seat, also conveniently hides any blankets, packets of wipes, etc you've stashed due to going over luggage allowance, attach luggage tag to handle)
https://amzn.eu/d/2rAcJ4L
(for pram, make sure get right one, umbrella style or separate depending on your pram, when you see the scuffs on the bag on arrival you'll see why good to use, also can attach luggage tag to the handle)
https://amzn.eu/d/8lsbcdw
(good for teething and any ear pain on board, can take a couple sachets in carry on in liquid allowance bag then just dispense onto spoon)
Most airports/airlines have a Travelling with young children section you can check as well.
It's also really hot on airplanes (well ones that fly to Italy anyway) so we always took a short sleeved body suit for changing baby into on flight as roasting otherwise. And we dress lighter for the inevitable contact nap to avoid overheating.
Hope this helps! 😊 When you've done it once, it's so much easier!