In a Facebook post, the airline said flights on these two days may be delayed or cancelled. It will waive administrative fees and penalties for refunds, re-booking or re-routing, for customers holding confirmed tickets issued on or before September 22 2013, for travel to and from Hong Kong until September 23 2013.
Get the full story from The Straits Times.
Here are updates from SIA's Facebook page:
Update as of 22 September 1115hrs - In view of Typhoon Usagi, the following Singapore Airlines flights will also be retimed: SQ 872/SQ871 on 22 September 2013.
Due to poor weather conditions expected in Hong Kong and Guangzhou from Typhoon Usagi, flights departing and arriving at Hong Kong International Airport and Guangzhou Baiyun International Airport from Sunday evening to Monday morning may be delayed or cancelled.
Customers who are booked on flights departing between 22 September and 23 September 2013 are strongly encouraged to postpone non-urgent travel.
For more information on the list of flights disrupted, please refer to http://bit.ly/18h9Kue.