Paris - 4 days with a 4 month old

HI there,
We've travelled with our daughter since she was about the same age. I think you're wise to keep to one paid/reserved activity per day since -- as you say -- your schedule will revolve around your baby's needs. Be very kind to yourselves. If you're visiting from overseas, you'll be jetlagged. It's hard to know how the travel might affect baby's schedule and tempermant.

Lots of gentle strolling and cafe breaks and finding beautiful places to sit. For example, I'd build in a little downtime at Jardin du Luxembourg to sit and people-watch on day one (weather permitting). And when you think about visiting Eiffel Tower, maybe plan to picnic at Champ de Mars rather than going up the tower itself. It's beautiful and a lot less stress than standing in line.

Is baby in a stroller or in a carrier that you/mom will wear? That may dictate how far you can travel in one go, especially when you're carrying diapers/wipes etc. I would personally find the crowds of Versailles daunting in June even without a baby.

Have a wonderful trip.

Congratulations on taking this adventure with Junior - who won't remember it but you will. If your kid is like my 3 were at 4 months they are actually really portable/washable/feedable on the fly - particularly if you get them accustomed to a front baby carrier ahead of time where they can sleep whenever they choose. Then Parent 1's hands can be free. Parent 2 gets the baby kit in a backpack. Europe in general has been getting hotter earlier, so if you have a hotel with AC that would be great. Junior may not settle easily if the climate is not what they are used to. My only concern would be that you are planning to be away from the hotel for all of Day 2 at Versailles. Maybe do half a day instead in case someone gets really cranky and needs some quiet/cool hotel time; that would be you parent.

Baby will be sleeping while you're visiting, so you'll need a front carrier and to check each site to see which ones allow a stroller. Second, be sure to check with the pediatrician about protecting baby's ears from pain during take off and landing.

Our first flew transatlantic to the US from France at about that age to meet his extended family in the US. I remember his sleeping after take off and waking just before London on the return trip.