PSA about Scoot Air.
SIN-SYD Boeing 787
I've flown a couple budget airlines in the past; Spirit, Ryanair, Easyjet, Wizz Air, Norwegian, Jetstar... however my Experience on Scoot was drastically different in the fact that all those airlines above, I've had no issue switching my seat either online after check in, or on the plane without charge.
The way Scoot Air works is, you can pre-purchase any seat ahead of time for about $35-$60 depends if you want an exit row etc. Also depends on the flight duration. If you haven't pre-purchased a seat, they stuff everyone from the back to the front of the plane randomly without the ability to change it online or at the gate. Only after you board and liftoff do they announce you can upgrade to an empty row if you have a Visa or MasterCard Credit card. No Debit cards or Amex.
That must have been the worst 8 hour flight for myself as I was stuck next to a larger person in the middle seat, and myself in the aisle which I hate. They weren't accepting my methods of payment that I had on board to upgrade.
Lesson learned, the flight price was more than half the next available ticket even with luggage allowance, I'll be booking a window seat and further up in the plane next time I fly Scoot, and I strongly suggest everyone do the same.