Carrier route record
OOORD→PIT
SkyWest Airlines · Chicago to Pittsburgh
- Flights
- 235
- Period
- September 2025 to August 2026
- Share of route
- 6%
- Carriers
- 5
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on ORD to PIT sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 235 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 1,722 at 80.3% on time.
Republic Airways is the most reliable of the three carriers covered here at 80.3% on time across 1,722 flights.
Key figures
On time
68.3%
Arrivals under 15 minutes late, of 227 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
3.40%
National rate is 1.89%
Whole route
73.6%
Every carrier on ORD to PIT, 4,029 flights
These figures cover 235 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
SkyWest against every carrier on ORD to PIT
SkyWest flew 235 of the 4,029 flights on ORD to PIT, about 6% of it. Its 68.3% on time is 5 points worse than the route as a whole, which runs 73.6%. Ranked by on-time rate it is number four of five carriers on the route, where the range runs from Republic at 80.3% to American at 54.2%. One 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 80.3% of the time; American Airlines manages 54.2%. Sample sizes sit next to every figure, because a two-point gap across 616 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways | 1,722 | 80.3% | 85 min | 2.56% | B |
| Envoy Airthin sample | 138 | 80.0% | 68 min | 2.17% | B |
| United Airlines | 1,318 | 74.2% | 68 min | 1.37% | C |
| SkyWest Airlines (this page)thin sample | 235 | 68.3% | 63 min | 3.40% | C− |
| American Airlines | 616 | 54.2% | 100 min | 3.08% | F− |
American Airlines cancels 3.1% 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 matters more here than the choice of carrier. The gap between the best and worst window is 27 points, against 26 points between the best and worst carrier.
- 5am–8am20 flights—
- 8am–11am8 flights—
- 11am–2pm31 flights90.0%
- 2pm–5pm161 flights63.2%
- 5pm–8pm15 flights—
- 8pm–5am—
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 90.0% on time, ahead of 2pm–5pm at 63.2%. 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 2pm–5pm window is the busiest, with 161 flights scheduled in it.
Across the year
SkyWest on ORD to PIT through the year
- Jul–Sep 202525 flights—
- Oct–Dec 202524 flights—
- Jan–Mar 202619 flights—
- Apr–Jun 2026124 flights76.0%
- Jul–Sep 202643 flights62.5%
Scale runs 55% 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 68.3% on time across 235 flights.
Split by quarter, SkyWest on ORD to PIT logged 25 flights in Jul–Sep 2025, 24 flights in Oct–Dec 2025, 19 flights in Jan–Mar 2026, 124 flights in Apr–Jun 2026 and 43 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 68.3% annual figure is the one to use.
Across the week, Wednesday is the strongest day at 75.7% on time and Sunday the weakest at 66.7%, a spread of 9 points.
Arrival by arrival
How late SkyWest on ORD to PIT runs when it is late
The 72 late arrivals split 21 under half an hour, 29 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early36 flights15.9%
- Within 15 min119 flights52.4%
- 15–29 min late21 flights9.3%
- 30–59 min late29 flights12.8%
- 1–2 hours late12 flights5.3%
- 2+ hours late10 flights4.4%
Scale runs 0% to 100%.
Share of 227 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 60 departures that left 15 minutes late or more, only 7 made it up before arrival. In the other direction, 19 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 PIT.
The worst days
Worst days for SkyWest on ORD to PIT
The latest arrival of the period was on 17 July 2026, 5 hours 51 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 July 2026 | 5 hours 51 minutes | Carrier |
| 18 May 2026 | 5 hours 18 minutes | Late-arriving aircraft |
| 22 September 2025 | 4 hours 38 minutes | Carrier |
| 28 March 2026 | 3 hours 12 minutes | Late-arriving aircraft |
| 5 August 2026 | 2 hours 56 minutes | Late-arriving aircraft |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 43% of the 4,547 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Carrier
- 38%Late-arriving aircraft
- 17%National Airspace System
- 2%Extreme weather
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,547 reported delay minutes here, that single category outweighs weather by 18 to one. The split is drawn from 4,547 reported delay minutes.
The largest share of delay minutes, 43%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,947 of the 4,547 delay minutes reported here.
Cancellations run at 3.40%, against 1.89% 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
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.
At 413 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 11am–2pm window matters as much as it does.
The return leg runs 68.4% on time across 235 flights, within half 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. 235 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 PIT
Put together: the delay figures matter less here than the 3.40% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 11am–2pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 227 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to PIT, every carrier
- SkyWest on PIT to ORD, the return leg
- Republic Airways on ORD to PIT80.3%
- Envoy Air on ORD to PIT80.0%
- United Airlines on ORD to PIT74.2%
- American Airlines on ORD to PIT54.2%
- SkyWest Airlines network-wide record
- Chicago O'Hare International (ORD) delay statistics
- Pittsburgh International (PIT) 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.