Flight number record

OO 6476

SkyWest Airlines · Chicago to Colorado Springs

Route: ORD → COS
Departs: 09:50
Flights: 279
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 6476, 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 6476 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 279 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.6%, so OO 6476 runs 14 points behind the country as a whole. Across a thousand flights that is about 145 extra late arrivals.

On time

63.1%

Arrivals under 15 minutes late, of 271 completed flights

Avg delay

85 min

Across delayed arrivals only, not all flights

Cancelled

2.15%

National rate is 1.81%

1 hour+ late

17.3%

National rate is 8.1%

These figures cover 279 flights between July 2025 and June 2026. Beyond the headline rate, 17.3% 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 6476 flies

OO 6476 flies ORD to COS without a single fixed slot. Its most common scheduled departure was 09:50, used on 45 of 279 flights, with 09:40 (39 flights) and 10:05 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:5045 flights16.1%
Departs 09:4039 flights14.0%
Departs 10:0531 flights11.1%

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 09:50 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 6476 runs 21 points worse at 63.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 6476 next to ORD to COS

Every carrier on ORD to COS combined arrived on time 69.7% of the time across 1,001 flights, so OO 6476 is 7 points behind it. SkyWest flew 822 flights on the same city pair under all its flight numbers, including this one, and those ran 66.8% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 16 points.

OO 6476 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 6476thin sample	279	63.1%	85 min	2.15%	D
All SkyWest Airlines on ORD–COS	822	66.8%	73 min	2.31%	C
All carriers on ORD–COS	1,001	69.7%	71 min	2.00%	C
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 6476 quarter by quarter

Quarter by quarter OO 6476 held fairly steady: 67.8% in Jul–Sep 2025, 62.2% in Oct–Dec 2025 and 59.3% in Jan–Mar 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights67.8%
Oct–Dec 202591 flights62.2%
Jan–Mar 202690 flights59.3%
Apr–Jun 20266 flights—

Scale runs 50% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, OO 6476 ranged from 56.4% on Friday to 67.6% on Saturday. With about 40 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 6476 runs late

One category carries most of the weight here. Carrier accounts for 44% of the 8,535 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.

Carrier
44%
Extreme weather
24%
Late-arriving aircraft
19%
National Airspace System
14%

Extreme weather accounts for 24% 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 3.8 times the usual weather exposure. The split is drawn from 8,535 delay minutes reported on OO 6476.

Cancellations sit at 2.15% against a national 1.81%, which is ordinary. Diversions add another 0.72%.

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. 17.3% 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 911 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 one other city pair in the data, including COS to ORD (58), but none flew often enough under OO 6476 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to COS only.

One caution: this is a thin sample. 279 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 6476

For a booking, OO 6476 is a flight to put a long connection behind. 17.3% 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.

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