To save up to 9% on this flight, we recommend booking at least 61 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Helena to Thailand from $800 1-2 weeks out and tickets from $828 for flights departing within the next 72 hours.
Flights from Helena to Thailand lean towards being more expensive in June. Prices are generally better when you fly from Helena to Thailand in April, with the cheapest ticket starting at $570.