United Airlines flies MLB → IAH — 14 flight numbers on record (UA3874, UA3879, UA3873). No departures are in the next-48h assignment window yet; aircraft assignments publish about two days out.
Counted from live tail assignments over the next 48 hours. A route with no equipped departures today can still get one — assignments publish about two days before departure.
Every United Airlines flight number observed on MLB → IAH. A dot marks numbers currently in the schedule window; the rest are from the observed route history. Follow any number for its per-flight Starlink record.
Want the reverse leg? IAH to MLB, or compare a full itinerary.