SQ639 Singapore Airlines - Flight Status

Which is the frequency of flight SQ639?
The flight SQ639 is scheduled to flight on daily basis.

Which is the distance of flight SQ639?
The distance between the two airports is 5301 kilometers.

Which is the flight time of flight SQ639?
The scheduled flight time gate to gate is: 07:25 hours.
The real flight time gate to gate on average is: 06:41 hours.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Tokyo: 2025-12-10 23:17:42
Current Time in Singapore: 2025-12-10 22:17:42

The following airlines serves the same route between Tokyo and Singapore:

JAL
- Flight Number: JL35. (On Time performance: 80 - Average Delay: 8 minutes)
- Flight Number: JL37. (On Time performance: 76 - Average Delay: 9 minutes)

ANA All Nippon Airways
- Flight Number: NH841. (On Time performance: 85 - Average Delay: 6 minutes)
- Flight Number: NH843. (On Time performance: 84 - Average Delay: 8 minutes)

Singapore Airlines
- Flight Number: SQ631. (On Time performance: 96 - Average Delay: 4 minutes)
- Flight Number: SQ633. (On Time performance: 91 - Average Delay: 5 minutes)
- Flight Number: SQ635. (On Time performance: 86 - Average Delay: 6 minutes)

We have gathered data from recent months and present below an analysis of how timely the flights have been.

Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions