UAORD→JAX

United flew 895 of the 2,172 flights on ORD to JAX, about 41% of it. Its 75.0% on time is 2 points better than the route as a whole, which runs 73.2%. Ranked by on-time rate it is number three of six carriers on the route, where the range runs from PSA at 100.0% to American at 63.8%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. Republic Airways arrives on time 80.7% of the time; American Airlines manages 63.8%. Sample sizes sit next to every figure, because a two-point gap across 433 flights means less than a ten-point one.

United on ORD to JAX often beats the schedule: 281 of 889 completed flights, 32%, arrived 15 minutes or more early. The 222 late arrivals split 78 under half an hour, 51 between 30 and 60 minutes, and 93 an hour or more.

The latest arrival of the period was on 17 June 2026, 6 hours 53 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.

10.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.

The 864 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.

The return leg is a different operation and performs like one: it runs 78.2% on time across 896 flights, 3 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 3 points of difference.

One caution: this is a thin sample. 895 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.