Flight number record
OO 3837
SkyWest Airlines · South Bend to Detroit
- Route
- SBN → DTW
- Departs
- 08:20
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3837, 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 3837 lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about 2.5 hours on average. That rests on 365 flights, with a median arrival 11 minutes early.
Key figures
On time
79.7%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
152 min
Across delayed arrivals only, not all flights
Cancelled
1.37%
National rate is 1.89%
1 hour+ late
13.4%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 13.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When OO 3837 flies
OO 3837 flies SBN to DTW without a single fixed slot. Its most common scheduled departure was 08:20, used on 231 of 365 flights, with 08:10 (41 flights) next.
- Departs 08:20231 flights63.3%
- Departs 08:1041 flights11.2%
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 08:20 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 3837 runs 4 points worse at 79.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
OO 3837 next to SBN to DTW
Every carrier on SBN to DTW combined arrived on time 79.2% of the time across 711 flights, so OO 3837 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 3837 | 365 | 79.7% | 152 min | 1.37% | B |
| All SkyWest Airlines on SBN–DTW | 711 | 79.2% | 135 min | 1.13% | B |
| All carriers on SBN–DTW | 711 | 79.2% | 135 min | 1.13% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 3837 quarter by quarter
OO 3837 did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.1% on time and its weakest Jan–Mar 2026 at 60.9%, a swing of 30 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 flights90.0%
- Oct–Dec 202592 flights75.6%
- Jan–Mar 202690 flights60.9%
- Apr–Jun 202691 flights91.1%
- Jul–Sep 202662 flights90.3%
Scale runs 50% to 95%.
By weekday, OO 3837 did best on Thursday at 92.2% on time and worst on Monday at 67.9%. Each day rests on about 52 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 3837 runs when it is late
OO 3837 often beats the schedule: 141 of 359 completed flights, 39%, arrived 15 minutes or more early. When OO 3837 is late it tends to be very late: 48 of its 73 late arrivals were an hour or more behind, and 30 were two hours or more.
- 15+ min early141 flights39.3%
- Within 15 min145 flights40.4%
- 15–29 min late12 flights3.3%
- 30–59 min late13 flights3.6%
- 1–2 hours late18 flights5.0%
- 2+ hours late30 flights8.4%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 72 departures that left 15 minutes late or more, only 8 made it up before arrival. 9 flights left on time and still arrived late.
The worst days
Worst days for OO 3837
The latest arrival of the period was on 10 December 2025, 15 hours 4 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 December 2025 | 15 hours 4 minutes | Carrier |
| 2 December 2025 | 11 hours 35 minutes | Carrier |
| 30 January 2026 | 10 hours 13 minutes | Carrier |
| 14 March 2026 | 7 hours 50 minutes | Carrier |
| 2 February 2026 | 7 hours 42 minutes | Carrier |
Delay causes
Why OO 3837 runs late
Carrier accounts for 81% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 81%Carrier
- 11%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 11% 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 1.8 times the usual weather exposure. The split is drawn from 11,122 delay minutes reported on OO 3837.
Cancellations sit at 1.37% against a national 1.89%, which is ordinary. Diversions add another 0.27%.
Connections and routes
What a delay on this flight costs
13.4% 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.
Every one of the 365 flights under OO 3837 in the data flew SBN to DTW. 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 3837
For a booking, OO 3837 is a flight to put a long connection behind. 13.4% 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
- 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
- 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.