Flight profile · SkyWest Airlines
OO5516
Grand Rapids (GRR) to Chicago (ORD) · scheduled 6:30 PM – 6:40 PM
How OO5516 performs
402 operations, 2023-07-01 to 2026-06-30.
OO5516 arrived on time 66.0% of the time, against 74.6% for all GRR → ORD flights — this specific departure is 8.6 percentage points worse than the route as a whole. Against SkyWest Airlines’s own flights on this route it is 2.8 points worse.
Source: US DOT Bureau of Transportation Statistics · 402 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| OO5516 | 66.0% | 2.74% | 3 min | 13.0% | 402 |
| SkyWest Airlines on GRR → ORD | 68.8% | 2.66% | -1 min | 13.8% | 2,141 |
| All GRR → ORD flights | 74.6% | 1.94% | -4 min | 9.5% | 9,533 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
Other routes OO5516 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| CPR→DEN Casper to Denver | 2026-06-01 – 2026-06-24 | 24 | — |
| SFO→SLC San Francisco to Salt Lake City | 2026-05-24 – 2026-05-24 | 1 | — |
| ORD→SCE Chicago to State College | 2024-10-01 – 2026-04-25 | 30 | — |
| IAH→MFE Houston to McAllen | 2026-03-05 – 2026-03-27 | 23 | — |
| ORD→MCI Chicago to Kansas City | 2023-09-30 – 2026-03-03 | 27 | — |
| ORD→ABE Chicago to Allentown | 2026-01-06 – 2026-02-10 | 36 | — |
| GSP→ORD Greenville/Greer/Spartanburg to Chicago | 2025-10-26 – 2025-12-01 | 28 | — |
| SBP→SFO San Luis Obispo to San Francisco | 2025-09-02 – 2025-10-25 | 52 | — |
| IAH→PIT Houston to Pittsburgh | 2025-08-19 – 2025-08-19 | 1 | — |
| SLC→DEN Salt Lake City to Denver | 2025-06-28 – 2025-08-16 | 8 | — |
| MSN→ORD Madison to Chicago | 2025-05-08 – 2025-05-12 | 3 | — |
| DEN→FSD Denver to Sioux Falls | 2025-04-07 – 2025-04-30 | 21 | — |
| SAV→ORD Savannah to Chicago | 2023-09-29 – 2025-02-12 | 54 | — |
| OMA→ORD Omaha to Chicago | 2025-01-11 – 2025-02-08 | 5 | — |
| SBP→LAX San Luis Obispo to Los Angeles | 2024-08-19 – 2024-09-30 | 43 | — |
| BHM→IAH Birmingham to Houston | 2024-06-28 – 2024-08-18 | 51 | — |
| BHM→ORD Birmingham to Chicago | 2024-05-23 – 2024-06-26 | 35 | — |
| LIT→IAH Little Rock to Houston | 2024-05-02 – 2024-05-02 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route OO5516 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
74 min late
against a median of 3 min late
OO5516 is a flight whose average understates its risk: a typical day arrives 3 min late, but the worst tenth of days are 71 minutes worse than that. If the day has something unmissable in it, the median is the wrong number to plan against.
Percentiles over 402 operations. Cancelled and diverted flights have no arrival time and are counted separately rather than as very late arrivals.
Why OO5516 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for OO5516 on GRR → ORD. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on GRR → ORD
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA2099 | United Airlines | 78.9% | 0 min early | 680 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 402 records of OO5516 operating GRR → ORD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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