The Brompton 6-speed is offered in 3 settings. At the lowest, the range is 29 to 87 gear inches. The standard setup is 33 to 99 gear inches. At the highest, it is 35 to 107 gear inches. None of these quite hit your range.

Another downside is that this range is spread over 6 gears - it means each gear change is pretty significant and can be compared to skipping every other gear on a normal bike. I eventually got used to this but at first, it wasnt great.

The upside is that the Brompton gearing "fits" a folding bike well - bikes that are folded tend to get bounced around a bit more and an external derailleur is a prime target for damage, not to mention than with small wheels, the external derailleur is quite close to the ground when riding. Since you want to use this bike for travel, this should be a consideration. You may want to lean toward a bike with a IGH - the Shimano Nexus and Rohloff hub gears offer very wide ranges.

To get more gear range on the Brompton, there are several other options - but all are quite costly.

Another folder to consider is the Birdy - I am pretty sure it is still available with the Rohloff. Plus, Bike Friday seems to be able to customize their bikes to your specific needs which is pretty compelling.