Go First extended the suspension of flight operations until June 4, citing operational reasons and expressing hope that it will be able to resume bookings shortly.
Go First, which is undergoing insolvency resolution proceedings, stopped flying on May 3.
The airline operates services to Kannur and Mumbai in India from Muscat and all these flights have been canceled.
Further, the aviation regulator, the Directorate General of Civil Aviation, had directed the cash-strapped airline to stop bookings until further notice.
"We regret to inform you that due to operational reasons, Go First flights scheduled till June 4, 2023, have been canceled. We apologize for the inconvenience caused by flight cancellations," Go First in a statement said.
The airline also added that a full refund would be issued to the original mode of payment shortly. "We acknowledge the flight cancellations might have disrupted your travel plans and we are committed to providing all the assistance we can," it added.
Senior executives of crisis-hit Go First, which is undergoing an insolvency resolution process, on Monday discussed its revival plans with officials of aviation regulator DGCA. The meeting, held in the national capital, came against the backdrop of the Directorate General of Civil Aviation (DGCA), last week, asking the grounded airline to submit its revival plan within 30 days.
The budget carrier, filed a petition for voluntary insolvency resolution proceedings on May 2, citing its inability to carry out operations due to the non-delivery of engines by the US engine maker Pratt & Whitney.
The plea of the airline was admitted by the National Company Law Tribunal (NCLT) on May 10.