Flight number record
OO 5309
SkyWest Airlines · Chicago to Fort Wayne
- Route
- ORD → FWA
- Departs
- 20:10
- Flights
- 312
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5309, 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 5309 earns a D−, which is as low as this site's scale goes for a reason. Only 57.9% of flights arrive inside the 15-minute window, 19 points worse than the national rate of 77.3%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 312 flights, with a median arrival 7 minutes late.
The national on-time rate over the same period is 77.3%, so OO 5309 runs 19 points behind the country as a whole. Across a thousand flights that is about 194 extra late arrivals.
Key figures
On time
57.9%
Arrivals under 15 minutes late, of 292 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
6.41%
National rate is 1.89%
1 hour+ late
19.5%
National rate is 8.3%
These figures cover 312 flights between September 2025 and August 2026. Beyond the headline rate, 19.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5309 flies
OO 5309 flies ORD to FWA without a single fixed slot. Its most common scheduled departure was 20:10, used on 89 of 312 flights, with 17:45 (47 flights) next.
- Departs 20:1089 flights28.5%
- Departs 17:4547 flights15.1%
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 20:10 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and OO 5309 runs 12 points worse at 57.9%. 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 5309 next to ORD to FWA
Every carrier on ORD to FWA combined arrived on time 63.2% of the time across 2,815 flights, so OO 5309 is 5 points behind it. SkyWest flew 2,587 flights on the same city pair under all its flight numbers, including this one, and those ran 62.4% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 21 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5309thin sample | 312 | 57.9% | 80 min | 6.41% | D− |
| All SkyWest Airlines on ORD–FWA | 2,587 | 62.4% | 80 min | 4.56% | D− |
| All carriers on ORD–FWA | 2,815 | 63.2% | 79 min | 4.58% | D− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5309 quarter by quarter
OO 5309 did not run the same all year. Its best quarter was Jul–Sep 2025 at 70.0% on time and its weakest Apr–Jun 2026 at 48.7%, a swing of 21 points on roughly 62 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 flights70.0%
- Oct–Dec 202591 flights61.2%
- Jan–Mar 202645 flights65.1%
- Apr–Jun 202684 flights48.7%
- Jul–Sep 202662 flights53.6%
Scale runs 40% to 75%.
By weekday, OO 5309 did best on Monday at 74.4% on time and worst on Friday at 46.2%. Each day rests on about 45 flights, so a gap of 28 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5309 runs when it is late
The 123 late arrivals split 34 under half an hour, 32 between 30 and 60 minutes, and 57 an hour or more.
- 15+ min early54 flights18.5%
- Within 15 min115 flights39.4%
- 15–29 min late34 flights11.6%
- 30–59 min late32 flights11.0%
- 1–2 hours late32 flights11.0%
- 2+ hours late25 flights8.6%
Scale runs 0% to 100%.
Share of 292 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 106 departures that left 15 minutes late or more, only 12 made it up before arrival. In the other direction, 29 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 FWA.
The worst days
Worst days for OO 5309
The latest arrival of the period was on 5 October 2025, 9 hours 15 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 October 2025 | 9 hours 15 minutes | Carrier |
| 28 December 2025 | 5 hours 48 minutes | Carrier |
| 29 December 2025 | 5 hours 23 minutes | Late-arriving aircraft |
| 30 August 2026 | 4 hours 44 minutes | National Airspace System |
| 31 December 2025 | 4 hours 25 minutes | Carrier |
Delay causes
Why OO 5309 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 9,782 reported delay minutes.
- 39%Carrier
- 34%Late-arriving aircraft
- 24%National Airspace System
- 4%Extreme weather
The largest share of delay minutes, 39%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,810 of the 9,782 delay minutes reported here. The split is drawn from 9,782 delay minutes reported on OO 5309.
Cancellations run at 6.41%, against 1.89% nationally. That is about 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
19.5% 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 five other city pairs in the data, including MCI to ORD (85), FNT to ORD (32) and SNA to SFO (24), but none flew often enough under OO 5309 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to FWA only.
One caution: this is a thin sample. 312 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 5309
For a booking, the cancellation rate is the figure to plan around on OO 5309: 6.41% of its 312 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ORD to FWA, every carrier and departure
- FWA to ORD, the return direction
- SkyWest Airlines 5448 on the same route61.8%
- SkyWest Airlines 4645 on the same route65.2%
- SkyWest Airlines 5331 on the same route58.2%
- 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.