Passengers are in for tough times as IndiGo and GoAir have decided to cancel more than 600 flights this month.

While IndiGo would be cancelling as many as 488 flights between March 15 and 31, GoAir has decided to cancel a total of 138 flights between March 15and March 22, the airline websites have respectively announced.

The cancellations by the two budget carriers, which operate more than 1,200 flights daily on average, may significantly disrupt the summer schedule, media reports said.

There was no immediate clarity about the way possible compensation and alternative choices would be made available to the passengers already having tickets.

IndiGo would not operate 36 daily flights between March 15 and March 21, as per the curtailed flight schedule submitted to the Directorate General of Civil Aviation (DGCA) and posted on the airlines website.

Another 18 daily flights would remain cancelled between March 22 and March 24. The number of flights cancelled between March 25 and March 31 stands at 26 per day, the airline indicated.

The revised schedule of Wadia group-promoted GoAir showed that the airline has cancelled seven daily flights to 10 destinations between March 16 and March 24 apart from cancelling six services per week between March 15 and March 22. On the whole, 138 flights stand cancelled, reported PTI.

Thus, together, IndiGo and GoAir have cancelled around 626 flights, the report said.