15

The normal price for Manado - Gorontalo is around $50. You could also reach Gorontalo by car from Manado for about 12 hours drive.

16

Air Asia don't go to Manado any more from Singapore.

Only Silk Air which is normally fairly expensive.

With a week in North Sulawesi I would go to Bunaken and forget the Togians.

Ferry from Gorontalo to Wakai runs on Tuesday night (arr Wed) and Friday night (arr Sat) returning Thursday afternoon (arr Fri morning) and Sunday afternoon (arrive Mon afternoon).

Unless you flew from Manado to Gorontalo, think it's Sriwijaya but possibly wrong,

Anyway, I know the company that flys between Manado to Gorontalo sometimes cancel if not enough passengers so you would have to allow an extra day to get back to Manado.

Too much hassle and uncertainty only to have a few days in the islands.

Bunaken is close to Manado, much easier to plan the logistics