Flight number record

OO 5790

SkyWest Airlines · Chicago to Charleston

Route: ORD → CRW
Departs: 18:20
Flights: 283
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5790, 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 5790 earns an F−, which is as low as this site's scale goes for a reason. Only 50.0% of flights arrive inside the 15-minute window, 28 points worse than the national rate of 77.6%. Late arrivals average an hour and a half. Treat any tight connection here as a coin flip. That rests on 283 flights, with a median arrival 15 minutes late.

The national on-time rate over the same period is 77.6%, so OO 5790 runs 28 points behind the country as a whole. Across a thousand flights that is about 276 extra late arrivals.

On time

50.0%

Arrivals under 15 minutes late, of 268 completed flights

Avg delay

98 min

Across delayed arrivals only, not all flights

Cancelled

4.59%

National rate is 1.81%

1 hour+ late

26.5%

National rate is 8.1%

These figures cover 283 flights between July 2025 and June 2026. Beyond the headline rate, 26.5% 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 5790 flies

OO 5790 flies ORD to CRW without a single fixed slot. Its most common scheduled departure was 18:20, used on 105 of 283 flights, with 18:09 (37 flights) and 17:51 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:20105 flights37.1%
Departs 18:0937 flights13.1%
Departs 17:5135 flights12.4%

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 18:20 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 5790 runs 18 points worse at 50.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 5790 next to ORD to CRW

Every carrier on ORD to CRW combined arrived on time 62.0% of the time across 947 flights, so OO 5790 is 12 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 29 points.

OO 5790 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5790thin sample	283	50.0%	98 min	4.59%	F−
All SkyWest Airlines on ORD–CRW	947	62.0%	83 min	2.96%	D
All carriers on ORD–CRW	947	62.0%	83 min	2.96%	D
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5790 quarter by quarter

OO 5790 did not run the same all year. Its best quarter was Oct–Dec 2025 at 60.4% on time and its weakest Apr–Jun 2026 at 41.7%, a swing of 19 points on roughly 71 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 202591 flights52.3%
Oct–Dec 202556 flights60.4%
Jan–Mar 202686 flights45.6%
Apr–Jun 202650 flights41.7%

Scale runs 35% to 65%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5790 did best on Tuesday at 59.5% on time and worst on Sunday at 35.1%. Each day rests on about 40 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5790 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 13,000 reported delay minutes.

Late-arriving aircraft
35%
Carrier
30%
National Airspace System
21%
Extreme weather
14%

Extreme weather accounts for 14% 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 quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.3 times the usual weather exposure. The split is drawn from 13,115 delay minutes reported on OO 5790.

Cancellations run at 4.59%, against 1.81% nationally. That is roughly one flight in twenty 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. 26.5% 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 two other city pairs in the data, including COS to ORD (6) and ORD to FWA (6), but none flew often enough under OO 5790 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to CRW only.

One caution: this is a thin sample. 283 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 5790

For a booking, the cancellation rate is the figure to plan around on OO 5790: 4.59% of its 283 scheduled flights did not operate. A late arrival costs an hour and a half, 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