Flight number record
OO 5108
SkyWest Airlines · Chicago to Salina
- Route
- ORD → SLN
- Departs
- 16:55
- Flights
- 303
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5108, 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 5108 earns a D−, which is as low as this site's scale goes for a reason. Only 57.5% of flights arrive inside the 15-minute window, 20 points worse than the national rate of 77.3%. Late arrivals average an hour and a half. Treat any tight connection here as a coin flip. That rests on 303 flights, with a median arrival 6 minutes late.
The national on-time rate over the same period is 77.3%, so OO 5108 runs 20 points behind the country as a whole. Across a thousand flights that is about 198 extra late arrivals.
Key figures
On time
57.5%
Arrivals under 15 minutes late, of 292 completed flights
Avg delay
98 min
Across delayed arrivals only, not all flights
Cancelled
3.63%
National rate is 1.89%
1 hour+ late
24.3%
National rate is 8.3%
These figures cover 303 flights between September 2025 and August 2026. Beyond the headline rate, 24.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5108 flies
OO 5108 flies ORD to SLN without a single fixed slot. Its most common scheduled departure was 16:55, used on 98 of 303 flights, with 16:50 (89 flights) and 16:29 (71 flights) next.
- Departs 16:5598 flights32.3%
- Departs 16:5089 flights29.4%
- Departs 16:2971 flights23.4%
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 16:55 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 5108 runs 14 points worse at 57.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 5108 next to ORD to SLN
Every carrier on ORD to SLN combined arrived on time 56.4% of the time across 362 flights, so OO 5108 is about level with it. 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 5108thin sample | 303 | 57.5% | 98 min | 3.63% | D− |
| All SkyWest Airlines on ORD–SLNthin sample | 362 | 56.4% | 107 min | 3.59% | D− |
| All carriers on ORD–SLNthin sample | 362 | 56.4% | 107 min | 3.59% | D− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5108 quarter by quarter
OO 5108 did not run the same all year. Its best quarter was Oct–Dec 2025 at 66.7% on time and its weakest Jul–Sep 2026 at 40.0%, a swing of 27 points on roughly 76 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 202524 flights—
- Oct–Dec 202590 flights66.7%
- Jan–Mar 202665 flights63.9%
- Apr–Jun 202662 flights48.3%
- Jul–Sep 202662 flights40.0%
Scale runs 30% to 70%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5108 did best on Tuesday at 79.1% on time and worst on Wednesday at 46.5%. Each day rests on about 43 flights, so a gap of 33 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5108 runs when it is late
When OO 5108 is late it tends to be very late: 71 of its 124 late arrivals were an hour or more behind, and 38 were two hours or more.
- 15+ min early49 flights16.8%
- Within 15 min119 flights40.8%
- 15–29 min late25 flights8.6%
- 30–59 min late28 flights9.6%
- 1–2 hours late33 flights11.3%
- 2+ hours late38 flights13.0%
Scale runs 0% to 100%.
Share of 292 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 113 departures that left 15 minutes late or more, only 12 made it up before arrival. In the other direction, 23 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 SLN.
The worst days
Worst days for OO 5108
The latest arrival of the period was on 14 August 2026, 6 hours 21 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 August 2026 | 6 hours 21 minutes | Late-arriving aircraft |
| 16 May 2026 | 5 hours 57 minutes | Late-arriving aircraft |
| 31 August 2026 | 5 hours 50 minutes | National Airspace System |
| 3 January 2026 | 5 hours 47 minutes | Carrier |
| 9 August 2026 | 5 hours 33 minutes | Late-arriving aircraft |
Delay causes
Why OO 5108 runs late
Late-arriving aircraft accounts for 45% of the 12,000 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Late-arriving aircraft
- 25%Carrier
- 24%National Airspace System
- 7%Extreme weather
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 12,000 reported delay minutes here, that single category outweighs weather by 7 to one. The split is drawn from 12,122 delay minutes reported on OO 5108.
Cancellations run at 3.63%, against 1.89% nationally. That is roughly one flight in 30 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
24.3% 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 559 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.
The same number turns up on four other city pairs in the data, including EAU to ORD (26), RHI to ORD (24) and SLN to ORD (21), but none flew often enough under OO 5108 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to SLN only.
One caution: this is a thin sample. 303 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 5108
For a booking, the cancellation rate is the figure to plan around on OO 5108: 3.63% of its 303 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- 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.