SQ631 TokyoHND · 08:55 SingaporeSIN · 15:00
SQ631 by Singapore Airlines flies from Tokyo (HND) to Singapore (SIN) for the Mon, Sep 14 departure.
departs HND · on schedule
board checked 5m ago · checking again in 45s
Where the minutes go
last 5 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival −28 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at HND and SIN are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Tokyo to Singapore flights today
same route · Singapore AirlinesIf SQ631 is cancelled, these are the other Singapore Airlines nonstop flights from Tokyo to Singapore on the same day, with scheduled departure times in HND local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How SQ631 actually runs
Pro Flight Search has tracked every published board update for SQ631 across the HND and SIN boards: schedule changes, gate pushes and actual clocks. Usually lands ~28 min early. Based on 5 confirmed landings · 5/5 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how SQ631 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: 9V-SNB.
Board clocks recorded as HND and SIN published them.
Planning around SQ631? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — SQ631 Tokyo to Singapore on-time performance, measured from the HND and SIN airport boards.
https://proflightsearch.com/flight/SQ631
.