There is nothing definite about getting it to work so I would not count on it, it will depend on the satellite provider, how your vpn is configured if you are going thru one, where you are flying, I fly tatl a lot wifi is great but it drops about 15 times on an average flight, if you are just browsing you might not notice it is so quick but a zoom call would tend to disconnect, you might also find yourself on a flight where the wifi simply isn’t working, not that common these days but it can happen, plus keep in mind confidentially and privacy issues, I find myself shocked at how little people consider this when working on a flight, my office has really begun to crack down on this essentially blocking our ability to connect into our systems from a growing number of locations, and sending out frequent reminders about privacy screens,

in the end if the call is important rearrange your flight, if it isn’t you can take your chances