How to Use Points on Budget Airline Subsidiaries Like Scoot
Budget sub-brands usually have no program of their own
A lot of big airlines operate a separate low-cost carrier underneath the main brand, Singapore Airlines and Scoot, Qantas and Jetstar, Air France and KLM with Transavia, Japan Airlines with ZIPAIR and Spring Japan, and the British Airways and Iberia group with Vueling. The thing to understand is that these subsidiaries typically do not run their own transferable loyalty program. There is no bank that transfers points to Scoot. So the question is not how to transfer to the subsidiary, but how to book it with the points you already have.
Book the subsidiary through its parent program
The answer is to redeem the parent airline miles for the subsidiary flights. Scoot is bookable with Singapore KrisFlyer miles: you log in on the Scoot site with your KrisFlyer credentials, choose the redeem-flights option, and economy awards start from as little as 1,500 KrisFlyer miles, with Saver and Advantage rates and the taxes payable in cash. The same pattern holds elsewhere: Jetstar flights can be booked with Qantas Points, Transavia with Air France KLM Flying Blue miles, ZIPAIR and Spring Japan through Japan Airlines Mileage Bank, and Vueling with Avios. Because KrisFlyer, Flying Blue, Avios, and the others are major bank transfer partners, your credit card points can reach these budget flights through the parent. See the KrisFlyer, Flying Blue, and Avios programs.
The upside: cheap short-haul and small-balance burns
Used well, this is a genuine sweet spot. Subsidiary awards are often very cheap in miles for short routes, Scoot economy from around 1,500 KrisFlyer miles is a good example, which makes them an excellent way to spend a small leftover balance that could never reach a premium-cabin award. They also reach leisure destinations the mainline airline does not fly, and since the parent currency takes bank transfers, you can top up from your card points when you are a little short. For draining an orphaned balance or covering a short hop, a subsidiary redemption can be the best use of otherwise stranded miles. See finding award space.
Check the value before you redeem
Here is the catch. Budget airlines are cheap in cash, which is the whole point of them, so spending valuable miles on a low fare can be poor value. Always compare the cash price to the miles plus the cash taxes, and work out the cents per mile, before you book. Some subsidiaries price awards badly: redeeming Japan Airlines miles on ZIPAIR is a known trap, because the conversion leaves each mile worth a fraction of a cent. And many independent ultra-low-cost carriers, like Ryanair or Spirit, have no award option at all and are revenue-only. So use the parent miles on a subsidiary when the cash fare is high relative to the miles, and simply pay cash when the fare is already cheap. See the JAL to ZIPAIR trap, when to use cash instead of points, and what your points are worth.