Worked for me with KL flight numbers, but only a few and they were all enroute to or from the US at the time of searching. So that may have something to do with

Worked for me with KL flight numbers, but only a few and they were all enroute to or from the US at the time of searching. So that may have something to do with it? Edit: KL605 to SFO worked while typing (it's in the air now), KL1125 to Copenhagen did not work while typing but did show up after pressing search (it's in the air now). Similar for KL713 to Paramaribo worked after pressing search, while it's still on the ground.