Flight number record

OO 5331

SkyWest Airlines · Chicago to Fort Wayne

Route: ORD → FWA
Departs: 15:35
Flights: 265
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5331, 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 5331 draws a D−. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 265 flights, with a median arrival 6 minutes late.

The national on-time rate over the same period is 77.6%, so OO 5331 runs 18 points behind the country as a whole. Across a thousand flights that is about 177 extra late arrivals.

On time

59.9%

Arrivals under 15 minutes late, of 252 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

4.53%

National rate is 1.81%

1 hour+ late

16.7%

National rate is 8.1%

These figures cover 265 flights between July 2025 and June 2026. Beyond the headline rate, 16.7% 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 5331 flies

OO 5331 is scheduled to leave Chicago (ORD) at 15:35 local time and reach Fort Wayne (FWA) at 17:51. That slot held for 212 of the 265 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 15:35212 flights80.0%
Departs 15:4031 flights11.7%

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 15:35 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 5331 runs 13 points worse at 59.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5331 next to ORD to FWA

Every carrier on ORD to FWA combined arrived on time 63.8% of the time across 2,699 flights, so OO 5331 is 4 points behind it. SkyWest flew 2,366 flights on the same city pair under all its flight numbers, including this one, and those ran 63.1% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 19 points.

OO 5331 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5331thin sample	265	59.9%	72 min	4.53%	D−
All SkyWest Airlines on ORD–FWA	2,366	63.1%	83 min	4.27%	D−
All carriers on ORD–FWA	2,699	63.8%	82 min	4.22%	D−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5331 quarter by quarter

OO 5331 did not run the same all year. Its best quarter was Jul–Sep 2025 at 76.7% on time and its weakest Apr–Jun 2026 at 46.7%, a swing of 30 points on roughly 66 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 202543 flights76.7%
Oct–Dec 202589 flights59.3%
Jan–Mar 202672 flights61.8%
Apr–Jun 202661 flights46.7%

Scale runs 40% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5331 did best on Thursday at 73.0% on time and worst on Monday at 53.8%. Each day rests on about 38 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5331 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 7,273 reported delay minutes.

Carrier
36%
National Airspace System
30%
Late-arriving aircraft
30%
Extreme weather
3%

The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,648 of the 7,273 delay minutes reported here. The split is drawn from 7,273 delay minutes reported on OO 5331.

Cancellations run at 4.53%, against 1.81% nationally. That is roughly one flight in twenty 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. 16.7% 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 same number turns up on three other city pairs in the data, including BOI to LAX (49), FWA to ORD (29) and FAR to ORD (3), but none flew often enough under OO 5331 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. 265 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 5331

For a booking, the cancellation rate is the figure to plan around on OO 5331: 4.53% of its 265 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.

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