Flight number record
OO 5977
SkyWest Airlines · Charlottesville to Chicago
- Route
- CHO → ORD
- Departs
- 10:45
- Flights
- 253
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5977, 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 5977 sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 253 flights, with a median arrival 8 minutes early.
Key figures
On time
75.3%
Arrivals under 15 minutes late, of 243 completed flights
Avg delay
95 min
Across delayed arrivals only, not all flights
Cancelled
3.95%
National rate is 1.89%
1 hour+ late
11.1%
National rate is 8.3%
These figures cover 253 flights between September 2025 and August 2026. Beyond the headline rate, 11.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5977 flies
OO 5977 flies CHO to ORD without a single fixed slot. Its most common scheduled departure was 10:45, used on 61 of 253 flights, with 12:20 (41 flights) and 10:55 (37 flights) next.
- Departs 10:4561 flights24.1%
- Departs 12:2041 flights16.2%
- Departs 10:5537 flights14.6%
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 10:45 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 5977 runs 9 points worse at 75.3%. 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 5977 next to CHO to ORD
Every carrier on CHO to ORD combined arrived on time 68.9% of the time across 1,236 flights, so OO 5977 is 6 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5977thin sample | 253 | 75.3% | 95 min | 3.95% | B− |
| All SkyWest Airlines on CHO–ORD | 1,236 | 68.9% | 118 min | 4.45% | C− |
| All carriers on CHO–ORD | 1,236 | 68.9% | 118 min | 4.45% | C− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5977 quarter by quarter
Quarter by quarter OO 5977 held fairly steady: 73.0% in Oct–Dec 2025, 82.3% in Apr–Jun 2026 and 75.6% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 20256 flights—
- Oct–Dec 202592 flights73.0%
- Jan–Mar 202632 flights—
- Apr–Jun 202682 flights82.3%
- Jul–Sep 202641 flights75.6%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5977 did best on Thursday at 83.8% on time and worst on Friday at 70.3%. Each day rests on about 36 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5977 runs when it is late
OO 5977 often beats the schedule: 77 of 243 completed flights, 32%, arrived 15 minutes or more early. The 60 late arrivals split 18 under half an hour, 15 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early77 flights31.7%
- Within 15 min106 flights43.6%
- 15–29 min late18 flights7.4%
- 30–59 min late15 flights6.2%
- 1–2 hours late12 flights4.9%
- 2+ hours late15 flights6.2%
Scale runs 0% to 100%.
Share of 243 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 48 departures that left 15 minutes late or more, only 1 made it up before arrival. In the other direction, 13 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 5977
The latest arrival of the period was on 30 December 2025, 10 hours 40 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across December, July, March and November, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 December 2025 | 10 hours 40 minutes | Late-arriving aircraft |
| 27 July 2026 | 7 hours 45 minutes | National Airspace System |
| 28 December 2025 | 6 hours 39 minutes | Late-arriving aircraft |
| 10 March 2026 | 4 hours 41 minutes | Carrier |
| 30 November 2025 | 4 hours 35 minutes | Extreme weather |
Delay causes
Why OO 5977 runs late
Late-arriving aircraft accounts for 53% of the 5,707 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Late-arriving aircraft
- 22%Carrier
- 21%National Airspace System
- 4%Extreme weather
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,707 reported delay minutes here, that single category outweighs weather by 12 to one. The split is drawn from 5,707 delay minutes reported on OO 5977.
Cancellations run at 3.95%, against 1.89% nationally. That is about one flight in 25 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
11.1% 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 566 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on two other city pairs in the data, including IAH to LBB (46) and ORD to ICT (21), but none flew often enough under OO 5977 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to CHO to ORD only.
One caution: this is a thin sample. 253 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 5977
For a booking, the cancellation rate is the figure to plan around on OO 5977: 3.95% of its 253 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.
Related
Where to go next
- CHO to ORD, every carrier and departure
- ORD to CHO, the return direction
- SkyWest Airlines 5606 on the same route57.0%
- 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.