According to the airline, two morning flights between the two provinces – PG351 to Mae Hong Son that was due to depart on 9.20am, and PG352 to Chiang Mai scheduled for 10.35am – were cancelled on yesterday.
The suspension was deemed necessary as both airports were shrouded by thick haze which reduced visibility to two kilometres.
The aircraft used to service the route, an ATR-72, requires a minimum visibility of 6km to be able to take off and land safely.
The airline said 10 morning flights have been cancelled over the past five days, and the suspensions will continue until tomorrow because of the poor visibility.
In Mae Hong Son Thursday, the level of PM 2.5 pollutants hovered at around 96 microgrammes per cubic metre (µg/m³) – almost double the safe threshold of 50 µg/m³.
Authorities said that 279 forest fires had been detected in Mae Hong Son between Jan 1 and March 12, as opposed to 141 during the same period last year.
Officers and civilians have been working to create buffer zones to prevent fires from spreading, officials said.
Deputy Prime Minister Prawit Wongsuwon visited Chiang Mai to follow up on efforts being undertaken to reduce haze in the North.
“The major cause was forest burning,” said Gen Prawit. “Ways must be sought to make sure there will be no forest burning in the future.”
At the time of writing, Chiang Mai was still rated the world’s most polluted city, with the situation worsening.
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