The quake hit on Wednesday morning leaving several homes damaged and a power outage, forcing the closure of New Chitose Airport.
For passenger safety, all commercial airlines have cancelled their Sapporo flights.
Pedestrians cross a street in darkness due to blackout in Sapporo, northern Japan, 06 September 2018. // EPA-EFE PHOTO
Those cancelled include the TG670 from Suvarnabhumi airport on September 6 and TG671 from Sapporo on September 7.
Thai said it would resume flights as soon as the airport reopens.
Passengers can check www.thaiairways.com or call Thai on 0-356-1111, 24-hours a day.