No problem in praying in front of non mahram while abiding by the proper hijab.
Kindly refer to the following link(s):

https://www.youtube.com/watch?v=Dk-0CnyGBD0

sheikh please let me know ruling on salah for women on board in plane, I am frequently traveling from east part of globe to west around 18 to 22 hrs journey.How can i pray in front of Non Meh ram If i pray on my seat , my prayer will b invalid , bcoz i will not b able to do qiaum, Also how to get actual direction of qibla & prayer time