Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.

REPUBLIC · FLIGHT YX 4390 SCHEDULED · TYPICAL SCHEDULE

Wednesday, September 30 Today

YX 4390 · BOS → JFK

departs 5:46 PM ET · arrives 7:29 PM ET

Forecast issued Wed 5:00 AM ET · 13h before departure

YX 4390 isn’t flying BOS → JFK today

This listing came from a typical schedule. According to the FAA, YX 4390 flies these legs today:

GSP → LGA · 10:54 AM · scheduled