[captaincrowbar]

"The first non-stop flights to Hawaii from mainland US"

(looks at map of Pacific)

Hang on ... where did the earlier ones stop?

[kortilla]

In the water: https://airandspace.si.edu/exhibitions/hawaii-by-air/online/...

[Akronymus]

I assume non-stop means direct, in this case.

[kqr]

On... boats? Not sure.