Any tips on flying with a 3 month old?

Erin • Military wife❤️ ITP💜 Oaklynd💛 Baby#2 due Jan2021💕

We will be flying sometime in July. I'll just be bringing her diaper bag with our clothes in it. And I'll either be wearing her or have her in the umbrella stroller haven't decided yet. Just wondering if there's anything that'll help make the trip smoother?