Air France may or may not be good - they do not allow carseats to be used during take off and landing - must be stowed during those times and they require a 'belly belt' which the FAA banned, so go figure.
I'm not sure if they will even sell you a ticket for the baby. Some EU carriers will not allow a child under two to have a seat. If you do buy a seat, you risk that they will force you to buy an infant fare when you get there which will be 10% of the walk-up rate ($$$).
Pumping as you go may help things. BM can be kept at room temp for 8 hours. Some sort of cover may be helpful if you have one and a handsfree pumping bra.
Mama to three boys ('03, '05, '07)