Carrier route record

AAJAX→ORD

American Airlines · Jacksonville to Chicago

Flights: 434
Period: September 2025 to August 2026
Share of route: 20%
Carriers: 6

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with American Airlines.

American on JAX to ORD lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 434 flights. The strongest carrier on the route with a full sample, United Airlines, flew 896 at 78.2% on time.

The US average over the same twelve months is 77.3%, so there is little to separate American on JAX to ORD from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

79.6%

Arrivals under 15 minutes late, of 421 completed flights

Avg delay

115 min

Across delayed arrivals only, not all flights

Cancelled

2.53%

National rate is 1.89%

Whole route

76.9%

Every carrier on JAX to ORD, 2,172 flights

These figures cover 434 flights between September 2025 and August 2026. Beyond the headline rate, 9.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Carrier by carrier

American against every carrier on JAX to ORD

American flew 434 of the 2,172 flights on JAX to ORD, about 20% of it. Its 79.6% on time is 3 points better than the route as a whole, which runs 76.9%. Ranked by on-time rate it is number two of six carriers on the route, where the range runs from PSA at 100.0% to SkyWest at 70.2%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The two carriers here are closely matched: half a point separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

On-time performance by carrier on JAX to ORD
Airline	Flights	On time	Avg delay	Cancelled	Grade
PSA Airlinesthin sample	1	100.0%	—	0.00%	A+
American Airlines (this page)	434	79.6%	115 min	2.53%	B
United Airlines	896	78.2%	92 min	0.89%	B+
Republic Airways	365	78.0%	75 min	4.11%	B−
Envoy Airthin sample	259	72.3%	69 min	0.39%	C+
SkyWest Airlinesthin sample	217	70.2%	82 min	2.76%	C

Republic Airways cancels 4.1% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

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Departure window

When American runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 38 points, against half a point between the best and worst carrier.

5am–8am264 flights89.8%
8am–11am24 flights—
11am–2pm21 flights—
2pm–5pm22 flights—
5pm–8pm101 flights51.5%
8pm–5am2 flights—

Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 51.5% on time, against 89.8% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 264 flights scheduled in it.

Across the year

American on JAX to ORD through the year

Jul–Sep 202560 flights88.1%
Oct–Dec 2025132 flights78.0%
Jan–Mar 202652 flights90.0%
Apr–Jun 202689 flights73.5%
Jul–Sep 2026101 flights76.3%

Scale runs 65% to 95%.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 79.6% on time across 434 flights.

American on JAX to ORD did not run the same all year. Its best quarter was Jan–Mar 2026 at 90.0% on time and its weakest Apr–Jun 2026 at 73.5%, a swing of 17 points on roughly 87 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, Wednesday is the strongest day at 92.3% on time and Friday the weakest at 76.3%, a spread of 16 points.

Arrival by arrival

How late American on JAX to ORD runs when it is late

American on JAX to ORD often beats the schedule: 174 of 421 completed flights, 41%, arrived 15 minutes or more early. The 86 late arrivals split 21 under half an hour, 24 between 30 and 60 minutes, and 41 an hour or more.

15+ min early174 flights41.3%
Within 15 min161 flights38.2%
15–29 min late21 flights5.0%
30–59 min late24 flights5.7%
1–2 hours late19 flights4.5%
2+ hours late22 flights5.2%

Scale runs 0% to 100%.

Share of 421 completed flights by arrival against schedule.

16 of 82 late departures made up the time and arrived on time, 20% of them. 20 flights left on time and still arrived late.

The worst days

Worst days for American on JAX to ORD

The latest arrival of the period was on 27 October 2025, 21 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of American on JAX to ORD in the period
Date	Arrived late by	Largest filed cause
27 October 2025	21 hours 22 minutes	Carrier
10 October 2025	11 hours 3 minutes	Carrier
20 March 2026	8 hours 38 minutes	Carrier
14 July 2026	6 hours 44 minutes	Late-arriving aircraft
1 August 2026	5 hours 59 minutes	Late-arriving aircraft

Delay causes

Why American 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 9,876 reported delay minutes.

Carrier
38%
Late-arriving aircraft
36%
National Airspace System
14%
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 9,876 reported delay minutes.

36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 9,876 reported delay minutes here, that single category outweighs weather by 3 to one.

Cancellations run at 2.53%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and stage length

What a delay here costs

9.7% 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 63.8% on time across 433 flights, 16 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 16 points of difference.

One caution: this is a thin sample. 434 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 American on JAX to ORD

Put together: treat all of this as provisional. 434 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 79.6% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 421 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures