Carrier route record

OOPIT→ORD

SkyWest Airlines · Pittsburgh to Chicago

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 PIT 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, 9 points worse than the national rate of 77.3%. The late ones land close to two hours behind schedule. That rests on 235 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 1,722 at 83.0% on time.

Republic Airways is the most reliable of the three carriers covered here at 83.0% on time across 1,722 flights.

On time

68.4%

Arrivals under 15 minutes late, of 225 completed flights

Avg delay

109 min

Across delayed arrivals only, not all flights

Cancelled

4.26%

National rate is 1.89%

Whole route

77.1%

Every carrier on PIT to ORD, 4,031 flights

These figures cover 235 flights between September 2025 and August 2026. Beyond the headline rate, 11.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Carrier by carrier

SkyWest against every carrier on PIT to ORD

SkyWest flew 235 of the 4,031 flights on PIT to ORD, about 6% of it. Its 68.4% on time is 9 points worse than the route as a whole, which runs 77.1%. Ranked by on-time rate it is number four of five carriers on the route, where the range runs from Republic at 83.0% to American at 66.4%. 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 83.0% of the time; American Airlines manages 66.4%. Sample sizes sit next to every figure, because a two-point gap across 619 flights means less than a ten-point one.

On-time performance by carrier on PIT to ORD
Airline	Flights	On time	Avg delay	Cancelled	Grade
Republic Airways	1,722	83.0%	72 min	1.68%	B
United Airlines	1,317	76.1%	103 min	2.20%	B
Envoy Airthin sample	138	74.8%	97 min	2.17%	C
SkyWest Airlines (this page)thin sample	235	68.4%	109 min	4.26%	C−
American Airlines	619	66.4%	120 min	3.07%	C−

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.

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

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 235 flights.

5am–8am15 flights—
8am–11am18 flights—
11am–2pm17 flights—
2pm–5pm38 flights55.6%
5pm–8pm144 flights63.2%
8pm–5am3 flights—

Scale runs 45% to 70%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is the strongest at 63.2% on time. The full set of windows spans 8 points.

Across the year

SkyWest on PIT to ORD through the year

Jul–Sep 202525 flights—
Oct–Dec 202524 flights—
Jan–Mar 202619 flights—
Apr–Jun 2026124 flights75.0%
Jul–Sep 202643 flights71.1%

Scale runs 65% 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 68.4% on time across 235 flights.

Split by quarter, SkyWest on PIT to ORD 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 68.4% annual figure is the one to use.

Across the week, Saturday is the strongest day at 77.8% on time and Tuesday the weakest at 65.8%, a spread of 12 points.

Arrival by arrival

How late SkyWest on PIT to ORD runs when it is late

SkyWest on PIT to ORD often beats the schedule: 65 of 225 completed flights, 29%, arrived 15 minutes or more early. The 71 late arrivals split 31 under half an hour, 15 between 30 and 60 minutes, and 25 an hour or more.

15+ min early65 flights28.9%
Within 15 min89 flights39.6%
15–29 min late31 flights13.8%
30–59 min late15 flights6.7%
1–2 hours late13 flights5.8%
2+ hours late12 flights5.3%

Scale runs 0% to 100%.

Share of 225 completed flights by arrival against schedule.

8 of 50 late departures made up the time and arrived on time, 16% 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 ORD.

The worst days

Worst days for SkyWest on PIT to ORD

The latest arrival of the period was on 29 November 2025, 18 hours 8 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The same cause led on three of the five worst days.

The latest arrivals of SkyWest on PIT to ORD in the period
Date	Arrived late by	Largest filed cause
29 November 2025	18 hours 8 minutes	National Airspace System
17 July 2026	16 hours 54 minutes	National Airspace System
4 May 2026	14 hours 32 minutes	Late-arriving aircraft
27 April 2026	11 hours 14 minutes	National Airspace System
22 September 2025	4 hours 30 minutes	Extreme weather

Delay causes

Why SkyWest runs late on this route

National Airspace System accounts for 52% of the 7,748 delay minutes carriers reported here, and the remaining four split what is left.

National Airspace System
52%
Carrier
21%
Late-arriving aircraft
21%
Extreme weather
5%

52% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 4,057 minutes out of 7,748, against a national NAS share of 21%. The split is drawn from 7,748 reported delay minutes.

Cancellations run at 4.26%, against 1.89% nationally. That is about one flight in 25 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

11.1% 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 5pm–8pm window matters as much as it does.

The return leg runs 68.3% 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 PIT to ORD

Put together: the delay figures matter less here than the 4.26% cancellation rate. A late arrival costs you close to two hours; 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. 225 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