Hundreds of Qantas engineers have gone on strike, but the airline insists no flights have been delayed or cancelled due to the industrial action.

Flights between 7am and 9am at major capital city airports Sydney, Melbourne, Brisbane, Canberra, Perth and Adelaide could be affected during the stoppages.

Travellers are bracing for flight delays as Qantas engineers again walk out on the job over alleged pay disputes.

Qantas workers are set to escalate industrial action as aircraft-towing engineers prepare to walk off the job during peak-hour flights to secure better pay.

Thousands of travellers could be facing delays as Qantas engineers plan to continue striking as staff negotiate an ongoing wage dispute.

After months of dispute between Qantas management and its maintenance engineers, it has seen tension hit an all-time high. More than 1,000 engineers are set to walk off the job this week. However, the airline has stressed to its customers that it has contingencies in place and does not expect to see any major disruptions to travel.

Qantas engineers critical to aircraft maintenance will stop work at major airports around the country next week, threatening to disrupt peak-hour flights at the start of school holidays.

Hundreds of Qantas engineers have gone on strike but the embattled airline insists no flights have been delayed or disrupted by the industrial action.