Got notification from Webjet that there is an early bird sale for return flights to Singapore on Singapore Airlines. For those happy with Scoot best to check out this deal. Otherwise I think its worth the extra coin to fly on Singapore Airlines. Premium economy also available from $1686.
Note other destinations are on sale as well - Phuket, Koh Samui, London, Paris with various 2018 travel dates so check it out.
If not expired yet, don't forget to sign up to the AMEX offer Spend $1000 and get $100 back for more savings.
I also checked directly on the Singapore Airlines website and they have similar pricing as well for below travel dates if you want to book directly with them.
Travel dates for Singapore are:
27 Feb - 10 Mar
04 May - 10 Jun
22 Jul - 14 Aug
Note on their website it says this sale finishes on 15th October but in lower section it says 31st October.
Found $638 from Brisbane same dates, same airline in February on skyscanner. No idea why would be cheaper through those sellers (i.e. BYOJet).