Flight number record
OO 4243
SkyWest Airlines · Detroit to Escanaba
- Route
- DTW → ESC
- Departs
- 21:15
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4243, 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 4243 lands a B−, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 3.0 hours on average. That rests on 365 flights, with a median arrival 16 minutes early.
Set against the rest of the country, OO 4243's record is 5 points better than the US average of 77.3%. That gap is worth roughly 49 fewer late arrivals for every thousand flights.
Key figures
On time
82.2%
Arrivals under 15 minutes late, of 331 completed flights
Avg delay
181 min
Across delayed arrivals only, not all flights
Cancelled
7.40%
National rate is 1.89%
1 hour+ late
8.2%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 8.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4243 flies
OO 4243 flies DTW to ESC without a single fixed slot. Its most common scheduled departure was 21:15, used on 219 of 365 flights, with 21:35 (65 flights) and 21:40 (42 flights) next.
- Departs 21:15219 flights60.0%
- Departs 21:3565 flights17.8%
- Departs 21:4042 flights11.5%
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 21:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and OO 4243 runs 12 points better at 82.2%. 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 4243 next to DTW to ESC
Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4243 | 365 | 82.2% | 181 min | 7.40% | B− |
| All SkyWest Airlines on DTW–ESC | 365 | 82.2% | 181 min | 7.40% | B− |
| All carriers on DTW–ESC | 365 | 82.2% | 181 min | 7.40% | B− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4243 quarter by quarter
OO 4243 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jan–Mar 2026 at 72.0%, a swing of 21 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 202530 flights93.3%
- Oct–Dec 202592 flights83.5%
- Jan–Mar 202690 flights72.0%
- Apr–Jun 202691 flights85.5%
- Jul–Sep 202662 flights82.8%
Scale runs 65% to 100%.
By weekday, OO 4243 did best on Saturday at 87.2% on time and worst on Sunday at 73.9%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4243 runs when it is late
OO 4243 often beats the schedule: 183 of 331 completed flights, 55%, arrived 15 minutes or more early. The 59 late arrivals split 22 under half an hour, 10 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early183 flights55.3%
- Within 15 min89 flights26.9%
- 15–29 min late22 flights6.6%
- 30–59 min late10 flights3.0%
- 1–2 hours late11 flights3.3%
- 2+ hours late16 flights4.8%
Scale runs 0% to 100%.
Share of 331 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 50 departures that left 15 minutes late or more, only 2 made it up before arrival. 11 flights left on time and still arrived late.
The worst days
Worst days for OO 4243
The latest arrival of the period was on 18 January 2026, 17 hours 55 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 January 2026 | 17 hours 55 minutes | Extreme weather |
| 12 August 2026 | 17 hours 28 minutes | Extreme weather |
| 7 June 2026 | 15 hours 49 minutes | Carrier |
| 4 May 2026 | 14 hours 58 minutes | Carrier |
| 22 July 2026 | 14 hours 17 minutes | Carrier |
Delay causes
Why OO 4243 runs late
Carrier accounts for 55% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Carrier
- 42%Extreme weather
- 3%National Airspace System
Extreme weather accounts for 42% 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 6.9 times the usual weather exposure. The split is drawn from 10,702 delay minutes reported on OO 4243.
Cancellations run at 7.40%, against 1.89% nationally. That is roughly one flight in fifteen 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
8.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 3.0 hours, which a normal layover absorbs.
Every one of the 365 flights under OO 4243 in the data flew DTW to ESC. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 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 4243
For a booking, the cancellation rate is the figure to plan around on OO 4243: 7.40% of its 365 scheduled flights did not operate. A late arrival costs about 3.0 hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- Detroit Metropolitan Wayne County (DTW) 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
- What a cancellation rate actually tells you (and what it hides)
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.