Is it possible that meteor could strike a commercial airliner?
Yes, it is possible, however unlikely!



The final report into the downing of MH17 investigated the possibility that the aeroplane was hit by "meteor or space debris"


  In section 3.5 a number of scenarios are analysed that relate to the possible source or sources of the object that perforated the aeroplane. These include meteor and space debris.


It was concluded that


  The chance of a meteor striking an aeroplane was calculated as being one event in 59,000 to 77,000 years. This value was obtained from the University of Pittsburgh's Department of Geology and Planetary Science and was originally part of the NTSB's investigation into the 1996 accident to TWA flight 800 (see NTSB Report AAR-00/03, dated 23 August 2000)