Flight number record

OO 5546

SkyWest Airlines · Denver to Colorado Springs

Route: DEN → COS
Departs: 15:35
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5546, 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 5546 lands a B, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 363 flights, with a median arrival 6 minutes early.

On time

77.3%

Arrivals under 15 minutes late, of 353 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

2.75%

National rate is 1.81%

1 hour+ late

8.2%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 2026. Beyond the headline rate, 8.2% 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 5546 flies

OO 5546 flies DEN to COS without a single fixed slot. Its most common scheduled departure was 15:35, used on 207 of 363 flights, with 15:40 (91 flights) and 15:41 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:35207 flights57.0%
Departs 15:4091 flights25.1%
Departs 15:4149 flights13.5%

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 5546 runs 5 points better at 77.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5546 next to DEN to COS

Every carrier on DEN to COS combined arrived on time 75.8% of the time across 5,039 flights, so OO 5546 is 2 points ahead of it. SkyWest flew 3,283 flights on the same city pair under all its flight numbers, including this one, and those ran 76.5% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 2 points.

OO 5546 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5546thin sample	363	77.3%	62 min	2.75%	B
All SkyWest Airlines on DEN–COS	3,283	76.5%	72 min	1.89%	B
All carriers on DEN–COS	5,039	75.8%	67 min	1.45%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5546 quarter by quarter

OO 5546 did not run the same all year. Its best quarter was Oct–Dec 2025 at 85.7% on time and its weakest Jul–Sep 2025 at 65.6%, a swing of 20 points on roughly 91 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 202592 flights65.6%
Oct–Dec 202591 flights85.7%
Jan–Mar 202689 flights80.7%
Apr–Jun 202691 flights78.0%

Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5546 did best on Saturday at 86.3% on time and worst on Friday at 64.0%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5546 runs late

One category carries most of the weight here. Carrier accounts for 45% of the 4,947 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
45%
Late-arriving aircraft
26%
National Airspace System
16%
Extreme weather
12%

Extreme weather accounts for 12% 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 2.0 times the usual weather exposure. The split is drawn from 4,947 delay minutes reported on OO 5546.

Cancellations run at 2.75%, against 1.81% nationally. That is roughly one flight in 40 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

8.2% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

Every one of the 363 flights under OO 5546 in the data flew DEN to COS. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 363 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 5546

For a booking, the cancellation rate is the figure to plan around on OO 5546: 2.75% of its 363 scheduled flights did not operate. A late arrival costs about 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