Flying while pregnant!

Alecia • Mom of two, 5 year old Eliana and 3 year old Julian
We are going on a baby moon to Mexico on Match 1st and I've never flown while pregnant before. I will be 29 weeks so a little nervous about a four hour flight!
Has anyone flown late into their pregnancy and been ok?
Tips are appreciated 👍
**Yes I know about CDC warning for Zika, I know about not eating peeled fruits and leafy greens, I know about drinking bottled water. I'm aware of the hazards to pregnant women while in Mexico, so spare me the lectures thanks!**