Carrier route record
OOJAX→ORD
SkyWest Airlines · Jacksonville to Chicago
- Flights
- 217
- Period
- September 2025 to August 2026
- Share of route
- 10%
- Carriers
- 6
Historical statistics for September 2025 to August 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, 7 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 217 flights. The strongest carrier on the route with a full sample, American Airlines, flew 434 at 79.6% on time.
American Airlines is the most reliable of the three carriers covered here at 79.6% on time across 434 flights.
Key figures
On time
70.2%
Arrivals under 15 minutes late, of 208 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
2.76%
National rate is 1.89%
Whole route
76.9%
Every carrier on JAX to ORD, 2,172 flights
These figures cover 217 flights between September 2025 and August 2026. Beyond the headline rate, 15.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
SkyWest against every carrier on JAX to ORD
SkyWest flew 217 of the 2,172 flights on JAX to ORD, about 10% of it. Its 70.2% on time is 7 points worse than the route as a whole, which runs 76.9%. 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 70.2%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The three carriers here are closely matched: 2 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| PSA Airlinesthin sample | 1 | 100.0% | — | 0.00% | A+ |
| American Airlines | 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 Airlines (this page)thin 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 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 217 flights.
- 5am–8am—
- 8am–11am20 flights—
- 11am–2pm102 flights75.8%
- 2pm–5pm—
- 5pm–8pm95 flights66.3%
- 8pm–5am—
Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 75.8% on time, ahead of 5pm–8pm at 66.3%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 11am–2pm window is the busiest, with 102 flights scheduled in it.
Across the year
SkyWest on JAX to ORD through the year
- Jan–Mar 20266 flights—
- Apr–Jun 202696 flights70.7%
- Jul–Sep 2026115 flights68.2%
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 70.2% on time across 217 flights.
Split by quarter, SkyWest on JAX to ORD logged 6 flights in Jan–Mar 2026, 96 flights in Apr–Jun 2026 and 115 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 70.2% annual figure is the one to use.
Across the week, Wednesday is the strongest day at 77.4% on time and Friday the weakest at 64.5%, a spread of 13 points.
Arrival by arrival
How late SkyWest on JAX to ORD runs when it is late
When SkyWest on JAX to ORD is late it tends to be very late: 33 of its 62 late arrivals were an hour or more behind, and 13 were two hours or more.
- 15+ min early46 flights22.1%
- Within 15 min100 flights48.1%
- 15–29 min late14 flights6.7%
- 30–59 min late15 flights7.2%
- 1–2 hours late20 flights9.6%
- 2+ hours late13 flights6.3%
Scale runs 0% to 100%.
Share of 208 completed flights by arrival against schedule.
10 of 60 late departures made up the time and arrived on time, 17% of them. In the other direction, 12 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ORD.
The worst days
Worst days for SkyWest on JAX to ORD
The latest arrival of the period was on 17 July 2026, 5 hours 15 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 July 2026 | 5 hours 15 minutes | Carrier |
| 7 August 2026 | 5 hours 14 minutes | Late-arriving aircraft |
| 13 June 2026 | 3 hours 22 minutes | Extreme weather |
| 11 August 2026 | 2 hours 59 minutes | National Airspace System |
| 7 August 2026 | 2 hours 57 minutes | Late-arriving aircraft |
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 5,051 reported delay minutes.
- 34%Late-arriving aircraft
- 28%National Airspace System
- 22%Carrier
- 16%Extreme weather
Extreme weather accounts for 16% 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 2.6 times the usual weather exposure. The split is drawn from 5,051 reported delay minutes.
34% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,051 reported delay minutes here, that single category outweighs weather by 2 to one.
Cancellations run at 2.76%, 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
15.9% 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 runs 71.1% on time across 218 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 217 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: treat all of this as provisional. 217 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 70.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 208 completed flights over 12 months sit behind that.
Related
Where to go next
- JAX to ORD, every carrier
- SkyWest on ORD to JAX, the return leg
- American Airlines on JAX to ORD79.6%
- United Airlines on JAX to ORD78.2%
- Republic Airways on JAX to ORD78.0%
- Envoy Air on JAX to ORD72.3%
- SkyWest Airlines network-wide record
- Jacksonville International (JAX) delay statistics
- Chicago O'Hare International (ORD) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.