10/06/2011 01:46 EDT | Updated 12/05/2011 05:12 EST

Qantas Airways cancels, delays dozens of flights amid another round of strikes by its workers

SYDNEY - Qantas Airways ground workers have cancelled a planned strike that threw the travel plans of thousands into chaos — but Qantas says dozens of flights will still be cancelled or delayed.

The flagship Australian carrier says it's too late to reinstate the 17 flights that were cancelled or reschedule the 29 flights that will be delayed on Friday because of the Transport Workers Union's planned strike.

The Australian Licenced Aircraft Engineers Association still plans to continue with its strike on Friday.

The unions have held a series of strikes in recent weeks as they fight the airline over pay and work conditions.

Qantas says more than 35,000 passengers have been affected by the unions' industrial action over the past month.