Emergency Vietnam Visa for Australians 2026 — AEST Cutoffs, SIN Port Warning, Boarding Letter 24/7

The 1-Hour window is open until 9pm Sydney time on weekdays — later than most Australians expect. The part that catches people out is the transit hub: every SYD and MEL flight goes through Singapore, and Singapore is never the entry port. AEST, AEDT, AWST, and QLD all converted, city by city, airline by airline.