Flight number record

OO 5134

SkyWest Airlines · Morgantown to Chicago

Route: MGW → ORD
Departs: 10:47
Flights: 322
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about 2.7 hours behind schedule. Build slack into anything you connect to. That rests on 322 flights, with a median arrival 8 minutes early.

The national on-time rate over the same period is 77.6%, so OO 5134 runs 11 points behind the country as a whole. Across a thousand flights that is about 105 extra late arrivals.

On time

67.1%

Arrivals under 15 minutes late, of 301 completed flights

Avg delay

160 min

Across delayed arrivals only, not all flights

Cancelled

6.21%

National rate is 1.81%

1 hour+ late

19.6%

National rate is 8.1%

These figures cover 322 flights between July 2025 and June 2026. Beyond the headline rate, 19.6% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

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 322 flights, with 10:57 (49 flights) and 08:40 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:4752 flights16.1%
Departs 10:5749 flights15.2%
Departs 08:4037 flights11.5%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 84.1%, and OO 5134 runs 17 points worse at 67.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 5134 next to MGW to ORD

Every carrier on MGW to ORD combined arrived on time 67.2% of the time across 338 flights, so OO 5134 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 12 points.

OO 5134 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5134thin sample	322	67.1%	160 min	6.21%	C−
All SkyWest Airlines on MGW–ORDthin sample	338	67.2%	156 min	6.80%	C−
All carriers on MGW–ORDthin sample	338	67.2%	156 min	6.80%	C−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	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 78.3% on time and its weakest Apr–Jun 2026 at 48.9%, a swing of 29 points on roughly 81 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 202592 flights78.3%
Oct–Dec 202590 flights61.9%
Jan–Mar 202690 flights70.0%
Apr–Jun 202650 flights48.9%

Scale runs 40% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5134 did best on Tuesday at 78.9% on time and worst on Friday at 58.7%. Each day rests on about 46 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5134 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 51% of the 16,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
51%
Carrier
33%
National Airspace System
10%
Extreme weather
6%
Security
0%

51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 16,000 reported delay minutes here, that single category outweighs weather by 9 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 15,844 delay minutes reported on OO 5134.

Cancellations run at 6.21%, against 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 19.6% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The same number turns up on three other city pairs in the data, including ORD to CIU (31), 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. 322 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: 6.21% of its 322 scheduled flights did not operate. A late arrival costs about 2.7 hours, but a cancellation costs the day, so leave a later option open.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures