Turboprop operators probably wouldn’t have the same flight planning resources as a major airline operating wide body jets long haul. The fligh planning department have access to huge amounts of data and can plan routes accordingly taking advantage of favourable winds and minimising unfavourable ones.
A London - Los Angeles flight would have several possible routes and significant savings can be made by selecting the most economical track, which may not be the shortest distance.
Turboprop routes are generally short and little variation is possible. A few “rules of thumb” would probably cover most operators.