Carrier route record

UAJAC→ORD

United Airlines · Jackson to Chicago

Flights: 421
Period: July 2025 to June 2026
Share of route: 51%
Carriers: 2

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.

United on JAC to ORD lands a B, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 421 flights, with a median arrival 7 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate United on JAC to ORD from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

76.2%

Arrivals under 15 minutes late, of 407 completed flights

Avg delay

117 min

Across delayed arrivals only, not all flights

Cancelled

2.14%

National rate is 1.81%

Whole route

69.8%

Every carrier on JAC to ORD, 818 flights

These figures cover 421 flights between July 2025 and June 2026. Beyond the headline rate, 8.8% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

United against every carrier on JAC to ORD

United flew 421 of the 818 flights on JAC to ORD, most of the route. Its 76.2% on time is 6 points better than the route as a whole, which runs 69.8%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 76.2% to American at 63.1%.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on JAC to ORD
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines (this page)	421	76.2%	117 min	2.14%	B
American Airlines	397	63.1%	107 min	1.01%	D

Departure window

When United runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 421 flights.

5am–8am91 flights76.1%
8am–11am57 flights77.8%
11am–2pm273 flights75.8%
2pm–5pm—
5pm–8pm—
8pm–5am—

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

The 8am–11am window is the strongest at 77.8% on time. The full set of windows spans 2 points.

Across the year

United on JAC to ORD through the year

Jul–Sep 2025179 flights75.6%
Oct–Dec 202548 flights66.0%
Jan–Mar 2026105 flights81.6%
Apr–Jun 202689 flights76.5%

Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 76.2% on time across 421 flights.

United on JAC to ORD did not run the same all year. Its best quarter was Jan–Mar 2026 at 81.6% on time and its weakest Oct–Dec 2025 at 66.0%, a swing of 16 points on roughly 105 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Tuesday is the strongest day at 87.7% on time and Sunday the weakest at 69.7%. 18 points is a smaller lever than departure hour, but it is free.

Delay causes

Why United runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 11,000 reported delay minutes.

Late-arriving aircraft
32%
Carrier
28%
National Airspace System
28%
Extreme weather
12%

Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 11,346 reported delay minutes.

The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 77.8% on time here.

Cancellations sit at 2.14% against a national 1.81%, which is ordinary. Diversions add another 1.19%.

Connections and stage length

What a delay here costs

8.8% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.

The 1,162 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg is a different operation and performs like one: it runs 68.3% on time across 420 flights, 8 points below 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 8 points of difference.

One caution: this is a thin sample. 421 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.

What to do with this

Booking United on JAC to ORD

Put together: treat all of this as provisional. 421 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 76.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 407 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures