Hi @s_mohler – I’m assuming you’re asking about tips from a health perspective right?
The main issue with infants during travel is the air pressure bothering their ears during take-off and landing. To remedy that, I used to breastfeed my baby to help relieve the pressure on take-off and landing. Bottle feeding works too – any sucking motion will help equalize ear pressure and reduce pain. Even if they weren’t actually drinking milk, I would allow them to keep suckling until the pressure in the plane stabilized again.
Breastfeeding also helps support immunity during travel. We have a helpful guide that includes the medicine cabinet must-haves for newborns & infants. They can consider bringing along some of those remedies to help with immunity or colic & gas if their baby is prone to digestive issues.
Hope that helps. Let me know if you meant something else.