As for Windows Phone, you are 2.7% of the phone market. This is a number that would not be a sound business decision to target and the loss would be significant.
As for tablets, even though the Android OS commands 67.4% of the market, iOS is the preferred tablet of choice by the airline industry with 25.6% of the total OS market share. This is a sound decision by the CEOs given the walled-garden of iOS. For kicks (since I know of at least one regional airline who is promising Windows tablets), Windows pulls in only 7% of the market share.
Despite the interest from a few NC Software customers, the recent rumors and scant market share do not look good for the future of a possible Windows Phone app.
Source: Market research firm International Data Corporation (IDC)