Carrier route record
OOORD→JAX
SkyWest Airlines · Chicago to Jacksonville
- Flights
- 218
- 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 ORD to JAX sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 218 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 365 at 80.7% on time.
Republic Airways is the most reliable of the three carriers covered here at 80.7% on time across 365 flights.
Key figures
On time
71.1%
Arrivals under 15 minutes late, of 211 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
1.83%
National rate is 1.89%
Whole route
73.2%
Every carrier on ORD to JAX, 2,172 flights
These figures cover 218 flights between September 2025 and August 2026. Beyond the headline rate, 11.4% 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 ORD to JAX
SkyWest flew 218 of the 2,172 flights on ORD to JAX, about 10% of it. Its 71.1% on time is 2 points worse than the route as a whole, which runs 73.2%. Ranked by on-time rate it is number five of six carriers on the route, where the range runs from PSA at 100.0% to American at 63.8%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Republic Airways arrives on time 80.7% of the time; American Airlines manages 63.8%. Sample sizes sit next to every figure, because a two-point gap across 433 flights means less than a ten-point one.
| 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 Airlines (this page)thin sample | 218 | 71.1% | 63 min | 1.83% | C |
| American Airlines | 433 | 63.8% | 97 min | 2.77% | D |
The spread between Republic and American is 17 points, wide enough that it should decide the booking. On a hundred trips that is 17 more arrivals inside the on-time window.
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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 218 flights.
- 5am–8am102 flights75.2%
- 8am–11am—
- 11am–2pm—
- 2pm–5pm95 flights72.2%
- 5pm–8pm21 flights—
- 8pm–5am—
Scale runs 65% to 80%. Rows with fewer than 30 flights show a dash.
The 5am–8am window is the strongest at 75.2% on time. The full set of windows spans 3 points.
Across the year
SkyWest on ORD to JAX through the year
- Jan–Mar 20266 flights—
- Apr–Jun 202696 flights74.2%
- Jul–Sep 2026116 flights67.9%
Scale runs 60% to 80%. 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 71.1% on time across 218 flights.
Split by quarter, SkyWest on ORD to JAX logged 6 flights in Jan–Mar 2026, 96 flights in Apr–Jun 2026 and 116 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 71.1% annual figure is the one to use.
Across the week, Tuesday is the strongest day at 84.8% on time and Sunday the weakest at 53.1%, a spread of 32 points.
Arrival by arrival
How late SkyWest on ORD to JAX runs when it is late
The 61 late arrivals split 18 under half an hour, 19 between 30 and 60 minutes, and 24 an hour or more.
- 15+ min early47 flights22.3%
- Within 15 min103 flights48.8%
- 15–29 min late18 flights8.5%
- 30–59 min late19 flights9.0%
- 1–2 hours late16 flights7.6%
- 2+ hours late8 flights3.8%
Scale runs 0% to 100%.
Share of 211 completed flights by arrival against schedule.
8 of 40 late departures made up the time and arrived on time, 20% of them. In the other direction, 29 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 JAX.
The worst days
Worst days for SkyWest on ORD to JAX
The latest arrival of the period was on 7 August 2026, 3 hours 53 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 August 2026 | 3 hours 53 minutes | Carrier |
| 18 May 2026 | 3 hours 40 minutes | National Airspace System |
| 15 May 2026 | 3 hours 21 minutes | Carrier |
| 11 August 2026 | 2 hours 46 minutes | Carrier |
| 4 July 2026 | 2 hours 42 minutes | Carrier |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 60% of the 3,847 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Carrier
- 25%National Airspace System
- 11%Late-arriving aircraft
- 4%Extreme weather
The largest share of delay minutes, 60%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,300 of the 3,847 delay minutes reported here. The split is drawn from 3,847 reported delay minutes.
Cancellations sit at 1.83% against a national 1.89%, which is ordinary. Diversions add another 1.38%.
Connections and stage length
What a delay here costs
11.4% 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 70.2% on time across 217 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. 218 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 ORD to JAX
Put together: treat all of this as provisional. 218 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 71.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 211 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to JAX, every carrier
- SkyWest on JAX to ORD, the return leg
- Republic Airways on ORD to JAX80.7%
- United Airlines on ORD to JAX75.0%
- Envoy Air on ORD to JAX73.0%
- American Airlines on ORD to JAX63.8%
- SkyWest Airlines network-wide record
- Chicago O'Hare International (ORD) delay statistics
- Jacksonville International (JAX) delay statistics
- Same route, different airline: where the carrier you pick matters most
- How often a connection fails at the major US hubs
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.