New Delhi, Nov. 6 -- Twelve foreign airlines, almost all from the Gulf and West Asia, have asked the civil aviation ministry to undo Mumbai airport's decision to refuse them take-off and landing slots next summer. If the decision stands, their flights would have to move to Navi Mumbai or stop altogether.

Mumbai International Airport Ltd (MIAL), which runs Chhatrapati Shivaji Maharaj International Airport (CSMIA), settled its slot list on Thursday. It found room for 38 of the 50 international airlines that wanted to fly from April, and none for the other 12. Those 12 run about 16 flights a day from Mumbai to 14 destinations, or around 112 a week. That is nearly 15% of the airport's 770 weekly international departures, according to data Mi...