I'm due to give birth at the end march. A close friend is getting married mid may so baby would be approx 6 weeks (if born on due date). The wedding is in Essex and I live in Bordeaux so would be flying.
At first it seemed like a good idea to go but now I'm starting to have doubts.
Yes and you will be fine. Most important tip is make sure you have something for them to suck on (either breast or soother) particularly during take-off and landing as the pressure changes are tough on their
If you're not BFing, bring more milk than you need in case of delays and make sure to have one additional babygrow and probably five more nappies than you think you'll need (pressure can do interesting things to small bowels too...) in hand luggage.
Finally, remember it will also be possible to buy things over there so don't worry too much about packing for the whole stay, more just for the journey section.