Carrier performance at one airport
OO→ORD
SkyWest Airlines at Chicago O'Hare International
- Departures
- 78,955
- Period
- September 2025 to August 2026
- Routes
- 25
- Rank here
- #10 of 12
SkyWest Airlines at Chicago carries a cancellation problem, not just a delay problem: 4.1% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, about two flights in three arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 78,955 flights, of which Envoy Air flew 57,966 at 76.1% on time.
Measured against the airport rather than the country, SkyWest Airlines runs 5 points behind the 70.7% weighted average across all carriers at ORD. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
65.8%
75,427 completed departures
Avg delay
88 min
Across delayed flights only
Cancelled
4.06%
At ORD, this carrier only
Rank here
#10
Of 12 carriers clearing the floor at ORD
These figures cover 79,000 flights between September 2025 and August 2026. Beyond the headline rate, 15.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Against the competition
Every carrier at ORD, ranked
The choice of carrier is not cosmetic here. Envoy Air arrives on time 76.1% of the time; PSA Airlines manages 60.2%. Sample sizes sit next to every figure, because a two-point gap across 2,832 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air | 57,966 | 76.1% | 65 min | 2.93% | B |
| Republic Airways | 33,415 | 76.1% | 74 min | 3.81% | B− |
| JetBlue Airways | 1,293 | 73.1% | 99 min | 6.34% | C− |
| United Airlines | 102,132 | 73.0% | 73 min | 1.30% | C |
| Delta Air Lines | 10,687 | 72.0% | 91 min | 3.13% | C− |
| Southwest Airlines | 3,139 | 71.3% | 70 min | 1.40% | C |
| Frontier Airlines | 4,179 | 67.7% | 109 min | 3.76% | C− |
| Alaska Airlines | 3,346 | 67.4% | 70 min | 1.82% | C |
| American Airlines | 61,506 | 66.4% | 82 min | 2.56% | C |
| SkyWest Airlines (this page) | 78,955 | 65.8% | 88 min | 4.06% | C− |
| Spirit Airlines | 3,558 | 63.4% | 83 min | 5.99% | D− |
| PSA Airlines | 2,832 | 60.2% | 127 min | 7.06% | D− |
PSA Airlines cancels 7.1% 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.
Route by route
Where SkyWest Airlines flies from ORD
SkyWest Airlines operates 25 routes out of ORD with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ORD to MKE · Milwaukee | 5,047 | 63.9% | 92 min | 4.58% | D− |
| ORD to SBN · South Bend | 2,777 | 63.0% | 87 min | 4.39% | D− |
| ORD to FWA · Fort Wayne | 2,587 | 62.4% | 80 min | 4.56% | D− |
| ORD to DTW · Detroit | 2,563 | 64.6% | 92 min | 3.47% | D− |
| ORD to OKC · Oklahoma City | 2,343 | 68.3% | 89 min | 3.46% | C− |
| ORD to FNT · Flint | 1,866 | 64.5% | 100 min | 4.18% | D− |
| ORD to MLI · Moline | 1,687 | 65.8% | 86 min | 5.81% | C− |
| ORD to LNK · Lincoln | 1,622 | 61.3% | 92 min | 3.45% | D− |
| ORD to CAK · Akron | 1,479 | 64.9% | 88 min | 4.87% | D− |
| ORD to BNA · Nashville | 1,433 | 60.6% | 93 min | 3.56% | D− |
| ORD to LEX · Lexington | 1,384 | 68.5% | 89 min | 3.54% | C− |
| ORD to MSN · Madison | 1,290 | 66.6% | 96 min | 5.19% | C− |
| ORD to ATW · Appleton | 1,251 | 66.2% | 94 min | 5.92% | C− |
| ORD to ICT · Wichita | 1,247 | 67.7% | 78 min | 2.17% | C |
| ORD to CHO · Charlottesville | 1,236 | 65.9% | 90 min | 3.96% | C− |
| ORD to MCI · Kansas City | 1,222 | 67.0% | 85 min | 4.09% | C− |
| ORD to PIA · Peoria | 1,212 | 67.2% | 74 min | 4.37% | C− |
| ORD to TVC · Traverse City | 1,209 | 64.4% | 99 min | 4.96% | D− |
| ORD to ASE · Aspen | 1,180 | 59.4% | 91 min | 3.22% | D− |
| ORD to GRB · Green Bay | 1,175 | 62.4% | 90 min | 4.94% | D− |
| ORD to DLH · Duluth | 1,114 | 64.0% | 79 min | 4.49% | D− |
| ORD to DSM · Des Moines | 1,082 | 65.5% | 77 min | 5.36% | C− |
| ORD to HSV · Huntsville | 1,002 | 65.4% | 101 min | 3.69% | C− |
| ORD to TUL · Tulsa | 991 | 75.4% | 68 min | 1.31% | B |
| ORD to CVG · Cincinnati | 984 | 64.8% | 89 min | 5.49% | D− |
Flight by flight
SkyWest Airlines flight numbers from ORD
40 SkyWest Airlines flight numbers leaving ORD flew their main route often enough to have a record of their own. Grouped by destination.
- OO 5290to BOI 19:4565.1%
- OO 4780to CAK 10:5076.7%
- OO 5352to CAK 17:5055.1%
- OO 5358to CAK 14:4063.8%
- OO 5982to CAK 21:2062.0%
- OO 5565to CHO 13:5567.1%
- OO 5610to CHO 17:4558.6%
- OO 5140to CMX 21:2563.0%
- OO 5521to COU 13:0071.3%
- OO 5437to DLH 12:4563.9%
- OO 5819to DLH 08:4871.5%
- OO 5124to EAU 21:5569.3%
- OO 4778to FAR 08:4563.7%
- OO 5603to FNT 20:0364.9%
- OO 4645to FWA 10:5565.2%
- OO 5309to FWA 20:1057.9%
- OO 5331to FWA 15:3558.2%
- OO 5448to FWA 13:5561.8%
- OO 5395to GSO 13:4380.2%
- OO 4809to ICT 08:5275.7%
- OO 5026to JST 21:2562.8%
- OO 5048to LAF 21:0963.8%
- OO 5215to LNK 08:4573.5%
- OO 5314to LNK 19:5157.2%
- OO 5593to MEM 08:5076.4%
- OO 5138to MGW 11:4567.3%
- OO 4711to MKE 19:4566.3%
- OO 5362to MKE 21:2069.9%
- OO 5555to MKE 17:4552.2%
- OO 4766to OKC 15:3573.2%
- OO 5392to OKC 19:4569.4%
- OO 5874to PIA 15:3559.4%
- OO 4636to SBN 17:5052.4%
- OO 4791to SBN 10:3565.6%
- OO 5274to SBN 21:2067.0%
- OO 5499to SBN 19:3558.5%
- OO 5505to SBN 15:3562.3%
- OO 5887to SBN 09:0066.1%
- OO 5108to SLN 16:5557.5%
- OO 5795to TUL 08:4578.6%
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 21 points, against 16 points between the best and worst carrier.
- 5am–8am6,596 flights77.4%
- 8am–11am15,769 flights71.4%
- 11am–2pm13,674 flights69.7%
- 2pm–5pm18,639 flights62.7%
- 5pm–8pm12,741 flights56.0%
- 8pm–5am11,536 flights62.3%
Scale runs 50% to 85%.
The 5pm–8pm window is where this operation falls apart: 56.0% on time, against 77.4% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 2pm–5pm window is the busiest, with 18,639 flights scheduled in it.
Across the year
Seasonal pattern
December is the weak month at 50.6% on time, against 77.4% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. July was the busiest month here, with 8,083 flights.
Delay causes
What holds this operation up
- 38%Carrier
- 28%Late-arriving aircraft
- 19%National Airspace System
- 16%Extreme weather
- 0%Security
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 2,258,702 reported delay minutes.
Cancellations run at 4.06%, 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.
15.2% 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.
78,955 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: the delay figures matter less here than the 4.06% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 75,427 completed flights over 12 months sit behind that.
Common questions
SkyWest Airlines at ORD
How often is SkyWest Airlines at ORD delayed?
About one flight in three arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 34.2% of the 78,955 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
Which airline is most reliable on SkyWest Airlines at ORD?
Envoy Air leads at 76.1% on time across 57,966 flights. PSA Airlines is at the other end on 60.2%, a gap of 16 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on SkyWest Airlines at ORD?
The 5am–8am departure window is the strongest at 77.4% on time. The 5pm–8pm window is the weakest at 56.0%, 21 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on SkyWest Airlines at ORD?
December is the weakest month at 50.6% on time, compared with 77.4% in September. Across the year that is 27 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
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.