Is the prayer valid for someone who prayed Fajr on an airplane, sitting, with the possibility of the time having expired, and uncertainty about the Qibla, and flight attendants and passengers passing in front of her without a proper sutra?

Your prayer is valid if it occurs after sunrise, but it is considered a missed prayer (qada') rather than a timely performance (ada'). It is often difficult to perform prayer in an airplane with all its pillars and conditions. The passenger is not required to pray in the aisle because it is a passageway for people, and doing so would inconvenience them. A weak hadith (definition) has been reported prohibiting prayer in the middle of the road due to the possibility of the heart being preoccupied and the space being constricted.