Flight number record
OO 4785
SkyWest Airlines · Houston to Nashville
- Route
- IAH → BNA
- Departs
- 18:05
- Flights
- 291
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4785, 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 4785 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 291 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.6%, so OO 4785 runs 6 points behind the country as a whole. Across a thousand flights that is about 61 extra late arrivals.
Key figures
On time
71.5%
Arrivals under 15 minutes late, of 288 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
1.03%
National rate is 1.81%
1 hour+ late
9.7%
National rate is 8.1%
These figures cover 291 flights between July 2025 and June 2026. Beyond the headline rate, 9.7% 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 4785 flies
OO 4785 flies IAH to BNA without a single fixed slot. Its most common scheduled departure was 18:05, used on 153 of 291 flights, with 18:15 (47 flights) and 18:10 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 18:05153 flights52.6%
- Departs 18:1547 flights16.2%
- Departs 18:1037 flights12.7%
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 18:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 4785 runs 3 points better at 71.5%. 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 4785 next to IAH to BNA
Every carrier on IAH to BNA combined arrived on time 72.2% of the time across 1,405 flights, so OO 4785 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4785thin sample | 291 | 71.5% | 68 min | 1.03% | C |
| All SkyWest Airlines on IAH–BNA | 394 | 69.0% | 77 min | 1.02% | C |
| All carriers on IAH–BNA | 1,405 | 72.2% | 66 min | 0.71% | C+ |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 4785 quarter by quarter
OO 4785 did not run the same all year. Its best quarter was Jul–Sep 2025 at 80.3% on time and its weakest Oct–Dec 2025 at 67.8%, a swing of 13 points on roughly 73 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 202561 flights80.3%
- Oct–Dec 202590 flights67.8%
- Jan–Mar 202690 flights71.3%
- Apr–Jun 202650 flights68.0%
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4785 did best on Wednesday at 78.0% on time and worst on Saturday at 65.9%. Each day rests on about 42 flights, so a gap of 12 points is worth noticing but could still narrow in another year.
Delay causes
Why OO 4785 runs late
One category carries most of the weight here. Carrier accounts for 54% of the 5,564 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.
- 54%Carrier
- 24%National Airspace System
- 19%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,001 of the 5,564 delay minutes reported here. The split is drawn from 5,564 delay minutes reported on OO 4785.
Cancellations sit at 1.03% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
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. 9.7% 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 657 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on three other city pairs in the data, including ORD to ILM (31), DEN to MKE (28) and SFO to PSP (1), but none flew often enough under OO 4785 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to BNA only.
One caution: this is a thin sample. 291 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 4785
For a booking, read OO 4785 as 71.5% on time with 1.03% cancelled over 291 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAH to BNA, every carrier and departure
- BNA to IAH, the return direction
- United Airlines 2174 on the same route86.1%
- George Bush Intercontinental (IAH) delay statistics
- Nashville International (BNA) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.