WN bumped their stopover allowance from 6 hours to 8 hours on April 13th, 2024 which enables even more such connections than were previously possible. They had bumped it up from 4 hours to 6 hours a few years ago. The legacy big 3 continue to have a 4 hour stopover limit on most domestic routes (Hawaii and Alaska fares are main exceptions). But since they have actual red-eye flights, they don't really need as lengthy limits.

WN stopover allowance on fares on April 12th and earlier from EF archived fare filings --



Stopover section on fares starting on April 13th --