The Federal Aviation Administration warned in a tweet that travelers could expect to see some snowy conditions in certain areas including Dallas, Fort Worth and Memphis, which could delay certain flights.

Transport Minister Anthony Loke says this is part of efforts to prevent flight fare hikes during the festive season.

However, the Malaysian Aviation Commission says that more can be done.

Heavy clashes in Baghdad killed at least 20 people, after Moqtada al-Sadr's announcement prompted his loyalists to storm a government palace and fight with rival groups.

The last flight from Iran to Malaysia will be on Aug 23.

The airport says flights were suspended to allow for 'an essential runway repair after high surface temperatures caused a small section to lift'.

The Malaysian Aviation Commission says all parties must abide by the High Court decision on the airline's debt restructuring process.

In the US, airports in Chicago were particularly hard-hit because of difficult weather.

Christmas holidays are peak time for air travel, but the rapid spread of the Omicron variant has led to a sharp increase in Covid-19 infections, forcing airlines to cancel flights as pilots and crew need quarantining.

A recent survey suggests a majority of travellers are likely to opt for the new 'pay when you fly' option in summer 2021

Many pilots are admitting that regaining flying skills after enforced time on the ground is proving harder than they anticipated.