You should be allowed up to 23:59 at EVERY change-of-planes point enroute on an int'l ticket. . . .

YEARS ago, on a cheapo fare - something like, $583 from CLE to NRT, I believe I did something like . . . .

CLE/CVG/ORD - 23 hours

ORD/DTW/LAX - 23 hours

LAX/NRT - destination for a few days

NRT/PDX - 20ish hours

PDX/SLC - 20ish hours

SLC/ATL/PIT

The whole thing priced out as one round trip!