Leaving on a Sunday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 5% on the overall cost on flights from Portland to Chiang Mai.
Due to multiple factors, expect to potentially pay more when booking in September. For low rates, November can be a great choice for travel to Chiang Mai. Flights to Chiang Mai from Portland in November are about $968 on average during November, but can be found for as low as $580.
When flying from Portland to Chiang Mai, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 26% versus a flight at noon.