Flight number record
OO 5134
SkyWest Airlines · Morgantown to Chicago
- Route
- MGW → ORD
- Departs
- 10:47
- Flights
- 305
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5134, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 5134 draws a D−. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is about 2.4 hours behind schedule. Build slack into anything you connect to. That rests on 305 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.3%, so OO 5134 runs 17 points behind the country as a whole. Across a thousand flights that is about 174 extra late arrivals.
Key figures
On time
59.9%
Arrivals under 15 minutes late, of 282 completed flights
Avg delay
142 min
Across delayed arrivals only, not all flights
Cancelled
7.21%
National rate is 1.89%
1 hour+ late
22.3%
National rate is 8.3%
These figures cover 305 flights between September 2025 and August 2026. Beyond the headline rate, 22.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5134 flies
OO 5134 flies MGW to ORD without a single fixed slot. Its most common scheduled departure was 10:47, used on 52 of 305 flights, with 15:04 (51 flights) and 08:40 (37 flights) next.
- Departs 10:4752 flights17.0%
- Departs 15:0451 flights16.7%
- Departs 08:4037 flights12.1%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 10:47 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 5134 runs 24 points worse at 59.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 5134 next to MGW to ORD
Every carrier on MGW to ORD combined arrived on time 60.3% of the time across 321 flights, so OO 5134 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 19 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5134thin sample | 305 | 59.9% | 142 min | 7.21% | D− |
| All SkyWest Airlines on MGW–ORDthin sample | 321 | 60.3% | 138 min | 7.79% | D− |
| All carriers on MGW–ORDthin sample | 321 | 60.3% | 138 min | 7.79% | D− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5134 quarter by quarter
OO 5134 did not run the same all year. Its best quarter was Jul–Sep 2025 at 73.3% on time and its weakest Jul–Sep 2026 at 39.5%, a swing of 34 points on roughly 61 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights73.3%
- Oct–Dec 202590 flights61.9%
- Jan–Mar 202690 flights70.0%
- Apr–Jun 202650 flights48.9%
- Jul–Sep 202645 flights39.5%
Scale runs 30% to 80%.
By weekday, OO 5134 ranged from 52.2% on Friday to 63.0% on Wednesday. With about 44 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 5134 runs when it is late
OO 5134 often beats the schedule: 79 of 282 completed flights, 28%, arrived 15 minutes or more early. When OO 5134 is late it tends to be very late: 63 of its 113 late arrivals were an hour or more behind, and 40 were two hours or more.
- 15+ min early79 flights28.0%
- Within 15 min90 flights31.9%
- 15–29 min late24 flights8.5%
- 30–59 min late26 flights9.2%
- 1–2 hours late23 flights8.2%
- 2+ hours late40 flights14.2%
Scale runs 0% to 100%.
Share of 282 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 85 departures that left 15 minutes late or more, only 1 made it up before arrival. 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 OO 5134
The latest arrival of the period was on 24 May 2026, 18 hours 43 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 May 2026 | 18 hours 43 minutes | Late-arriving aircraft |
| 7 December 2025 | 14 hours 21 minutes | Carrier |
| 16 December 2025 | 12 hours 45 minutes | Late-arriving aircraft |
| 25 September 2025 | 11 hours 49 minutes | Late-arriving aircraft |
| 19 December 2025 | 11 hours 3 minutes | Late-arriving aircraft |
Delay causes
Why OO 5134 runs late
Late-arriving aircraft accounts for 51% of the 16,000 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 29%Carrier
- 14%National Airspace System
- 5%Extreme weather
- 0%Security
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 16,000 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 16,010 delay minutes reported on OO 5134.
Cancellations run at 7.21%, against 1.89% nationally. That is about one flight in fifteen 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 routes
What a delay on this flight costs
22.3% 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 same number turns up on two other city pairs in the data, including IAD to MGW (21) and IAD to CKB (1), but none flew often enough under OO 5134 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MGW to ORD only.
One caution: this is a thin sample. 305 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 OO 5134
For a booking, the cancellation rate is the figure to plan around on OO 5134: 7.21% of its 305 scheduled flights did not operate. A late arrival costs about 2.4 hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- Chicago O'Hare International (ORD) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.