Originally Posted by
tentseller
At SIN: T1 is the middle and T2 and T3 are the two wings in the shape of the letter U.
Walking from middle of T3 to the D gates (DL) at T1 is about 20 minutes. There are optional moving walkway along the way.
Yes, but that's the airside route. What's the landside one? For some reason I'm thinking you cannot walk from T3 to T1 without going all the way over to T2 first.