Flight number record

OO 5108

SkyWest Airlines · Chicago to Salina

Route: ORD → SLN
Departs: 16:50
Flights: 303
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 draws a D−. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 303 flights, with a median arrival 4 minutes late.

The national on-time rate over the same period is 77.6%, so OO 5108 runs 15 points behind the country as a whole. Across a thousand flights that is about 148 extra late arrivals.

On time

62.8%

Arrivals under 15 minutes late, of 293 completed flights

Avg delay

96 min

Across delayed arrivals only, not all flights

Cancelled

3.30%

National rate is 1.81%

1 hour+ late

20.1%

National rate is 8.1%

These figures cover 303 flights between July 2025 and June 2026. Beyond the headline rate, 20.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When OO 5108 flies

OO 5108 flies ORD to SLN without a single fixed slot. Its most common scheduled departure was 16:50, used on 102 of 303 flights, with 16:55 (98 flights) and 16:45 (73 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:50102 flights33.7%
Departs 16:5598 flights32.3%
Departs 16:4573 flights24.1%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 16:50 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 5108 runs 10 points worse at 62.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5108 next to ORD to SLN

Every carrier on ORD to SLN combined arrived on time 60.9% of the time across 362 flights, so OO 5108 is 2 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 16 points.

OO 5108 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5108thin sample	303	62.8%	96 min	3.30%	D−
All SkyWest Airlines on ORD–SLNthin sample	362	60.9%	106 min	3.31%	D−
All carriers on ORD–SLNthin sample	362	60.9%	106 min	3.31%	D−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5108 quarter by quarter

OO 5108 did not run the same all year. Its best quarter was Jul–Sep 2025 at 68.2% on time and its weakest Apr–Jun 2026 at 48.3%, a swing of 20 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 202586 flights68.2%
Oct–Dec 202590 flights66.7%
Jan–Mar 202665 flights63.9%
Apr–Jun 202662 flights48.3%

Scale runs 40% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5108 did best on Tuesday at 75.0% on time and worst on Sunday at 43.9%. Each day rests on about 43 flights, so a gap of 31 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5108 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 10,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
45%
Carrier
27%
National Airspace System
23%
Extreme weather
5%

45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 10,000 reported delay minutes here, that single category outweighs weather by 9 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 10,427 delay minutes reported on OO 5108.

Cancellations run at 3.30%, against 1.81% nationally. That is about 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 20.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on five other city pairs in the data, including RHI to ORD (37), EAU to ORD (26) 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: 3.30% 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.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures