Thursday will be a "challenging" day, he told reporters.
The DGCA announced its decision to ground the aircraft on Tuesday night.
Kharola said SpiceJet will adjust most passengers in its own flights. If the need arises, other operators will pitch in.
Operators have also agreed not to indulge in "predatory pricing", he said.
The decision to ground the aircraft came days after a 737 MAX 8 aircraft operated by Ethiopian Airlines crashed near Addis Ababa, killing 157 people, including four Indians.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)