Leaving Wed afternoon, returning Fri early evening. It’s only an 85 minute flight.
About US$160 round trip on Jetstar Asia (with basic seat selections, but no checked baggage – both of these cost extra). Also includes the S$18/US$14 booking fee that didn’t appear until the final confirmation screen. It could have been cheaper if I had booked a few weeks ago (e.g. I saw a one-way flight to KL for $2 + tax on one day).
And as a bonus, it looks like I can do a day boat trip to an Indonesian island from Singapore, which would make it 5 countries this trip 