And FxCal/FxBidLite has a helper for 100 in 30, but as with others, not a for sure thing.
Even if it was, my past research with company is they can pull you from a trip at less than 100.
Example: your trip ends up last two legs are CDG HKG and HKG MEM.
If you are projected to be in HKG with the HKG MEM leg that would put you at say 98 or 99, they might preemptive pull you, cuz they want to protect the freight and not have you overfly by an hour on the way to HKG and not be legal to operate HKG MEM. This is a soft number that is not published and likely changes by manning, seasonal weather, etc.