Flight number record
OO 5278
SkyWest Airlines · Houston to Oklahoma City
- Route
- IAH → OKC
- Departs
- 18:12
- Flights
- 285
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5278, 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 5278 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 285 flights, with a median arrival 5 minutes early.
Key figures
On time
74.7%
Arrivals under 15 minutes late, of 281 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
1.40%
National rate is 1.89%
1 hour+ late
13.2%
National rate is 8.3%
These figures cover 285 flights between September 2025 and August 2026. Beyond the headline rate, 13.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5278 flies
OO 5278 flies IAH to OKC without a single fixed slot. Its most common scheduled departure was 18:12, used on 81 of 285 flights, with 18:05 (56 flights) and 18:20 (40 flights) next.
- Departs 18:1281 flights28.4%
- Departs 18:0556 flights19.6%
- Departs 18:2040 flights14.0%
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 18:12 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 5278 runs 7 points better at 74.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 5278 next to IAH to OKC
Every carrier on IAH to OKC combined arrived on time 80.5% of the time across 1,224 flights, so OO 5278 is 6 points behind it. SkyWest flew 890 flights on the same city pair under all its flight numbers, including this one, and those ran 80.0% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5278thin sample | 285 | 74.7% | 93 min | 1.40% | C |
| All SkyWest Airlines on IAH–OKC | 890 | 80.0% | 89 min | 1.12% | B |
| All carriers on IAH–OKC | 1,224 | 80.5% | 83 min | 1.23% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5278 quarter by quarter
OO 5278 did not run the same all year. Its best quarter was Jan–Mar 2026 at 77.3% on time and its weakest Jul–Sep 2025 at 66.7%, a swing of 11 points on roughly 57 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 202530 flights66.7%
- Oct–Dec 202555 flights74.5%
- Jan–Mar 202669 flights77.3%
- Apr–Jun 202670 flights73.9%
- Jul–Sep 202661 flights77.0%
Scale runs 60% to 85%.
By weekday, OO 5278 did best on Friday at 87.2% on time and worst on Saturday at 59.0%. Each day rests on about 41 flights, so a gap of 28 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5278 runs when it is late
OO 5278 often beats the schedule: 72 of 281 completed flights, 26%, arrived 15 minutes or more early. When OO 5278 is late it tends to be very late: 37 of its 71 late arrivals were an hour or more behind, and 12 were two hours or more.
- 15+ min early72 flights25.6%
- Within 15 min138 flights49.1%
- 15–29 min late12 flights4.3%
- 30–59 min late22 flights7.8%
- 1–2 hours late25 flights8.9%
- 2+ hours late12 flights4.3%
Scale runs 0% to 100%.
Share of 281 completed flights by arrival against schedule.
9 of 75 late departures made up the time and arrived on time, 12% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for OO 5278
The latest arrival of the period was on 2 October 2025, 13 hours 35 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across October, July, September, December and August, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 October 2025 | 13 hours 35 minutes | Carrier |
| 27 July 2026 | 12 hours 23 minutes | Extreme weather |
| 15 September 2025 | 5 hours 1 minute | Carrier |
| 28 December 2025 | 4 hours 8 minutes | Late-arriving aircraft |
| 9 August 2026 | 3 hours 4 minutes | Late-arriving aircraft |
Delay causes
Why OO 5278 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 6,605 reported delay minutes.
- 40%Carrier
- 34%Late-arriving aircraft
- 21%Extreme weather
- 5%National Airspace System
Extreme weather accounts for 21% 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 3.5 times the usual weather exposure. The split is drawn from 6,605 delay minutes reported on OO 5278.
Cancellations sit at 1.40% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
13.2% 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 three other city pairs in the data, including ORD to HSV (36), ATW to ORD (21) and ORD to ATW (6), but none flew often enough under OO 5278 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to OKC only.
One caution: this is a thin sample. 285 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 5278
For a booking, OO 5278 is a flight to put a long connection behind. 13.2% 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
- IAH to OKC, every carrier and departure
- OKC to IAH, the return direction
- George Bush Intercontinental (IAH) 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.