Carrier route record

AAORD→JAX

American Airlines · Chicago to Jacksonville

Flights: 433
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 ORD to JAX draws a D. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 433 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 365 at 80.7% on time.

The national on-time rate over the same period is 77.3%, so American on ORD to JAX runs 14 points behind the country as a whole. Across a thousand flights that is about 135 extra late arrivals.

On time

63.8%

Arrivals under 15 minutes late, of 420 completed flights

Avg delay

97 min

Across delayed arrivals only, not all flights

Cancelled

2.77%

National rate is 1.89%

Whole route

73.2%

Every carrier on ORD to JAX, 2,172 flights

These figures cover 433 flights between September 2025 and August 2026. Beyond the headline rate, 20.5% 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 ORD to JAX

American flew 433 of the 2,172 flights on ORD to JAX, about 20% of it. Its 63.8% on time is 9 points worse than the route as a whole, which runs 73.2%. Ranked by on-time rate it is last 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 two carriers here are closely matched: 6 points 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 ORD to JAX
Airline	Flights	On time	Avg delay	Cancelled	Grade
PSA Airlinesthin sample	1	100.0%	—	0.00%	A+
Republic Airways	365	80.7%	59 min	1.92%	B
United Airlines	895	75.0%	83 min	0.45%	B+
Envoy Airthin sample	260	73.0%	55 min	0.38%	C+
SkyWest Airlinesthin sample	218	71.1%	63 min	1.83%	C
American Airlines (this page)	433	63.8%	97 min	2.77%	D

No carrier stands out. Republic tops the table at 80.7%, 6 points clear of the bottom, which is inside the range this kind of sample moves year to year.

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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 14 points, against 6 points between the best and worst carrier.

5am–8am44 flights75.0%
8am–11am19 flights—
11am–2pm78 flights65.8%
2pm–5pm27 flights—
5pm–8pm263 flights61.2%
8pm–5am2 flights—

Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 61.2% on time, against 75.0% 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 5pm–8pm window is the busiest, with 263 flights scheduled in it.

Across the year

American on ORD to JAX through the year

Jul–Sep 202560 flights65.0%
Oct–Dec 2025131 flights68.7%
Jan–Mar 202652 flights64.0%
Apr–Jun 202689 flights61.0%
Jul–Sep 2026101 flights58.8%

Scale runs 50% to 75%.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 63.8% on time across 433 flights.

Quarter by quarter American on ORD to JAX held fairly steady: 65.0% in Jul–Sep 2025, 68.7% in Oct–Dec 2025, 64.0% in Jan–Mar 2026, 61.0% in Apr–Jun 2026 and 58.8% in Jul–Sep 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Across the week, Wednesday is the strongest day at 77.4% on time and Sunday the weakest at 50.0%, a spread of 27 points.

Arrival by arrival

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

When American on ORD to JAX is late it tends to be very late: 86 of its 152 late arrivals were an hour or more behind, and 42 were two hours or more.

15+ min early97 flights23.1%
Within 15 min171 flights40.7%
15–29 min late32 flights7.6%
30–59 min late34 flights8.1%
1–2 hours late44 flights10.5%
2+ hours late42 flights10.0%

Scale runs 0% to 100%.

Share of 420 completed flights by arrival against schedule.

34 of 173 late departures made up the time and arrived on time, 20% of them. 13 flights left on time and still arrived late.

The worst days

Worst days for American on ORD to JAX

The latest arrival of the period was on 15 August 2026, 15 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.

The latest arrivals of American on ORD to JAX in the period
Date	Arrived late by	Largest filed cause
15 August 2026	15 hours 53 minutes	Late-arriving aircraft
14 July 2026	7 hours 36 minutes	Late-arriving aircraft
1 December 2025	6 hours 42 minutes	Extreme weather
1 August 2026	6 hours 29 minutes	Late-arriving aircraft
23 June 2026	5 hours 54 minutes	Late-arriving aircraft

Delay causes

Why American runs late on this route

Late-arriving aircraft accounts for 66% of the 15,000 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
66%
Carrier
21%
National Airspace System
10%
Extreme weather
3%
Security
0%

66% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 15,000 reported delay minutes here, that single category outweighs weather by 19 to one. The split is drawn from 14,745 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 75.0% on time here.

Cancellations run at 2.77%, against 1.89% nationally. That is roughly 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

20.5% 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 79.6% on time across 434 flights, 16 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 16 points of difference.

One caution: this is a thin sample. 433 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 ORD to JAX

Put together: treat all of this as provisional. 433 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 63.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 420 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