Dear keeppurathu: First and foremost, when travelling in an airline you have to comply with their rules and regulations as they are in place for our safety. If your request to offer salah using a prayer mat was denied by the airline staff then you could've offered it in your seat like most do and not missed the Fajr salah. Allah s.w.t is all knowing and recognizes your niyat. The concept of Qibla does not apply while travelling in an airplane like acchabachcha has pointed out.

One person's ignorance or conduct does not malign his/her religion.