What is the ruling on praying in clothes whose purity is doubted after performing ablution in the unclean lavatories of an airplane, then re-praying later after changing clothes?

The bathroom walls are impure, but they do not make clothes impure simply by touching them, unless one of them is wet, in which case the impurity transfers. If that is confirmed, one prays in the impure garment after removing the عين النجاسة (the substance of the impurity). If one does not find a pure garment, one prays and does not have to repeat the prayer, according to the Almighty's saying: (So fear Allah as much as you are able).