Flight number record
OO 5780
SkyWest Airlines · Memphis to Chicago
- Route
- MEM → ORD
- Departs
- 14:22
- Flights
- 279
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5780, 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 5780 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 279 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so OO 5780 runs 9 points behind the country as a whole. Across a thousand flights that is about 92 extra late arrivals.
Key figures
On time
68.1%
Arrivals under 15 minutes late, of 273 completed flights
Avg delay
84 min
Across delayed arrivals only, not all flights
Cancelled
1.43%
National rate is 1.89%
1 hour+ late
13.6%
National rate is 8.3%
These figures cover 279 flights between September 2025 and August 2026. Beyond the headline rate, 13.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5780 flies
OO 5780 flies MEM to ORD without a single fixed slot. Its most common scheduled departure was 14:22, used on 71 of 279 flights, with 14:48 (48 flights) and 14:55 (36 flights) next.
- Departs 14:2271 flights25.4%
- Departs 14:4848 flights17.2%
- Departs 14:5536 flights12.9%
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 14:22 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 5780 runs 4 points worse at 68.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 5780 next to MEM to ORD
Every carrier on MEM to ORD combined arrived on time 74.8% of the time across 2,529 flights, so OO 5780 is 7 points behind it. SkyWest flew 866 flights on the same city pair under all its flight numbers, including this one, and those ran 70.6% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5780thin sample | 279 | 68.1% | 84 min | 1.43% | C |
| All SkyWest Airlines on MEM–ORD | 866 | 70.6% | 90 min | 3.00% | C |
| All carriers on MEM–ORD | 2,529 | 74.8% | 82 min | 3.80% | C− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5780 quarter by quarter
OO 5780 did not run the same all year. Its best quarter was Oct–Dec 2025 at 76.1% on time and its weakest Apr–Jun 2026 at 56.8%, a swing of 19 points on roughly 93 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 202529 flights—
- Oct–Dec 202589 flights76.1%
- Jan–Mar 20268 flights—
- Apr–Jun 202691 flights56.8%
- Jul–Sep 202662 flights61.7%
Scale runs 50% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5780 did best on Saturday at 78.9% on time and worst on Monday at 58.5%. Each day rests on about 40 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5780 runs when it is late
The 87 late arrivals split 24 under half an hour, 26 between 30 and 60 minutes, and 37 an hour or more.
- 15+ min early67 flights24.5%
- Within 15 min119 flights43.6%
- 15–29 min late24 flights8.8%
- 30–59 min late26 flights9.5%
- 1–2 hours late16 flights5.9%
- 2+ hours late21 flights7.7%
Scale runs 0% to 100%.
Share of 273 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 62 departures that left 15 minutes late or more, only 6 made it up before arrival. In the other direction, 31 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 5780
The latest arrival of the period was on 20 April 2026, 6 hours 52 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 April 2026 | 6 hours 52 minutes | Carrier |
| 31 August 2026 | 6 hours 11 minutes | Late-arriving aircraft |
| 3 November 2025 | 4 hours 43 minutes | Carrier |
| 24 November 2025 | 4 hours 10 minutes | Late-arriving aircraft |
| 18 December 2025 | 4 hours | Late-arriving aircraft |
Delay causes
Why OO 5780 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 7,299 reported delay minutes.
- 34%National Airspace System
- 29%Late-arriving aircraft
- 27%Carrier
- 10%Extreme weather
34% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,481 minutes out of 7,299, against a national NAS share of 21%. The split is drawn from 7,299 delay minutes reported on OO 5780.
Cancellations sit at 1.43% against a national 1.89%, which is ordinary. Diversions add another 0.72%.
Connections and routes
What a delay on this flight costs
13.6% 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 one other city pair in the data, including GRB to ORD (23), but none flew often enough under OO 5780 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MEM to ORD only.
One caution: this is a thin sample. 279 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 5780
For a booking, OO 5780 is a flight to put a long connection behind. 13.6% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- MEM to ORD, every carrier and departure
- ORD to MEM, the return direction
- SkyWest Airlines 5672 on the same route81.6%
- Memphis International (MEM) delay statistics
- 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
- How often a connection fails at the major US hubs
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.