Depending on the fare class of your ticket, business earn between 135% and 150%, once you hit Classic plus, it goes up to 160% and 175%

https://www.turkishairlines.com/en-q...nes/index.html

Use the mileage calculator below to map it out

Mileage Calculator - WebFlyer :: The Frequent Flyer Authority


Based on your flight listed above WDH-IST-BRU, you would need 3-4 round trip business class flights a year. Your *G status would then be good for 2 years. To maintain status you would need 2-3 round trip flights over those two years in business class to maintain status. Turkish has great re-qualification levels for existing members. Economy class tickets are much trickier, with many fare classes earning little to no points.