To save up to 17% on this flight, we recommend booking at least 17 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Idaho to Portland from $104 1-2 weeks out and tickets from $129 for flights departing within the next 72 hours.
The best pricing can be found in the month of April. Prices to Portland from Idaho average $112. You can even find prices in April for less than $112, as users have found deals to Portland from as low as $41. The month of December appears to be one of the more expensive times to travel to Portland from Idaho. Flying in the targeted month can save you up to 39%.