Carrier route record

OOJAX→ORD

SkyWest Airlines · Jacksonville to Chicago

Flights: 150
Period: July 2025 to June 2026
Share of route: 7%
Carriers: 6

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

SkyWest on JAX to ORD sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 150 flights. The strongest carrier on the route with a full sample, United Airlines, flew 893 at 77.8% on time.

The national on-time rate over the same period is 77.6%, so SkyWest on JAX to ORD runs 5 points behind the country as a whole. Across a thousand flights that is about 54 extra late arrivals.

On time

72.2%

Arrivals under 15 minutes late, of 144 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

3.33%

National rate is 1.81%

Whole route

77.3%

Every carrier on JAX to ORD, 2,062 flights

These figures cover 150 flights between July 2025 and June 2026. Beyond the headline rate, 9.7% 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

SkyWest against every carrier on JAX to ORD

SkyWest flew 150 of the 2,062 flights on JAX to ORD, about 7% of it. Its 72.2% on time is 5 points worse than the route as a whole, which runs 77.3%. Ranked by on-time rate it is last of six carriers on the route, where the range runs from PSA at 100.0% to SkyWest at 72.2%. 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+
Republic Airwaysthin sample	317	79.3%	71 min	4.73%	B−
United Airlines	893	77.8%	92 min	0.67%	B+
American Airlines	465	77.6%	126 min	2.80%	B
Envoy Airthin sample	236	75.2%	67 min	0.42%	B+
SkyWest Airlines (this page)thin sample	150	72.2%	64 min	3.33%	C−

No carrier stands out. United tops the table at 77.8%, half a point clear of the bottom, which is inside the range this kind of sample moves year to year.

Departure window

When SkyWest 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 150 flights.

5am–8am—
8am–11am—
11am–2pm89 flights72.1%
2pm–5pm3 flights—
5pm–8pm58 flights72.7%
8pm–5am—

Scale runs 65% to 80%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is the strongest at 72.7% on time. The full set of windows spans half a point.

Across the year

SkyWest on JAX to ORD through the year

Jul–Sep 202548 flights71.7%
Jan–Mar 20266 flights—
Apr–Jun 202696 flights70.7%

Scale runs 60% to 75%. 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 72.2% on time across 150 flights.

Split by quarter, SkyWest on JAX to ORD logged 48 flights in Jul–Sep 2025, 6 flights in Jan–Mar 2026 and 96 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 72.2% annual figure is the one to use.

Delay causes

Why SkyWest 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 2,543 reported delay minutes.

Late-arriving aircraft
40%
National Airspace System
31%
Extreme weather
17%
Carrier
13%

Extreme weather accounts for 17% 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 2.7 times the usual weather exposure. The split is drawn from 2,543 reported delay minutes.

40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,543 reported delay minutes here, that single category outweighs weather by 2 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit.

Cancellations run at 3.33%, against 1.81% nationally. That is about one flight in 30 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.7% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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. 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 77.9% on time across 150 flights, 6 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 6 points of difference.

One caution: this is a thin sample. 150 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 SkyWest on JAX to ORD

Put together: the delay figures matter less here than the 3.33% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 5pm–8pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 144 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