Flight number record

OO 5459

SkyWest Airlines · Houston to Colorado Springs

Route: IAH → COS
Departs: 19:50
Flights: 270
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5459, 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 5459 lands a B, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 270 flights, with a median arrival 5 minutes early.

On time

76.4%

Arrivals under 15 minutes late, of 267 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

1.11%

National rate is 1.81%

1 hour+ late

8.6%

National rate is 8.1%

These figures cover 270 flights between July 2025 and June 2026. Beyond the headline rate, 8.6% 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 5459 flies

OO 5459 flies IAH to COS without a single fixed slot. Its most common scheduled departure was 19:50, used on 101 of 270 flights, with 20:00 (45 flights) and 19:55 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:50101 flights37.4%
Departs 20:0045 flights16.7%
Departs 19:5537 flights13.7%

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 19:50 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 5459 runs 8 points better at 76.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 5459 next to IAH to COS

Every carrier on IAH to COS combined arrived on time 76.3% of the time across 277 flights, so OO 5459 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 3 points.

OO 5459 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5459thin sample	270	76.4%	72 min	1.11%	B
All SkyWest Airlines on IAH–COSthin sample	277	76.3%	72 min	1.08%	B
All carriers on IAH–COSthin sample	277	76.3%	72 min	1.08%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5459 quarter by quarter

Quarter by quarter OO 5459 held fairly steady: 76.4% in Jul–Sep 2025, 74.7% in Oct–Dec 2025, 79.2% in Jan–Mar 2026 and 76.0% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights76.4%
Oct–Dec 202576 flights74.7%
Jan–Mar 202653 flights79.2%
Apr–Jun 202650 flights76.0%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5459 did best on Tuesday at 84.2% on time and worst on Wednesday at 67.6%. Each day rests on about 39 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5459 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 4,564 reported delay minutes.

Carrier
33%
Extreme weather
26%
Late-arriving aircraft
22%
National Airspace System
19%

Extreme weather accounts for 26% 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 4.2 times the usual weather exposure. The split is drawn from 4,564 delay minutes reported on OO 5459.

Cancellations sit at 1.11% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

8.6% 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 a little over an hour, which a normal layover absorbs.

The 809 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 four other city pairs in the data, including LAX to RDD (35), CID to ORD (4) and SFO to LAX (4), but none flew often enough under OO 5459 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to COS only.

One caution: this is a thin sample. 270 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 5459

For a booking, read OO 5459 as 76.4% on time with 1.11% cancelled over 270 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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