Flight number record

OO 5989

SkyWest Airlines · Lubbock to Denver

Route: LBB → DEN
Departs: 17:35
Flights: 322
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5989, 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 5989 earns an F, which is as low as this site's scale goes for a reason. Only 52.9% of flights arrive inside the 15-minute window, 25 points worse than the national rate of 77.6%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 322 flights, with a median arrival 13 minutes late.

The national on-time rate over the same period is 77.6%, so OO 5989 runs 25 points behind the country as a whole. Across a thousand flights that is about 247 extra late arrivals.

On time

52.9%

Arrivals under 15 minutes late, of 310 completed flights

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

1.86%

National rate is 1.81%

1 hour+ late

17.4%

National rate is 8.1%

These figures cover 322 flights between July 2025 and June 2026. Beyond the headline rate, 17.4% 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 5989 flies

OO 5989 flies LBB to DEN without a single fixed slot. Its most common scheduled departure was 17:35, used on 75 of 322 flights, with 17:20 (52 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:3575 flights23.3%
Departs 17:2052 flights16.1%

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 17:35 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 5989 runs 15 points worse at 52.9%. 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 5989 next to LBB to DEN

Every carrier on LBB to DEN combined arrived on time 75.5% of the time across 980 flights, so OO 5989 is 23 points behind it. SkyWest flew 708 flights on the same city pair under all its flight numbers, including this one, and those ran 69.9% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 26 points.

OO 5989 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5989thin sample	322	52.9%	75 min	1.86%	F
All SkyWest Airlines on LBB–DEN	708	69.9%	98 min	1.55%	C
All carriers on LBB–DEN	980	75.5%	93 min	1.53%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5989 quarter by quarter

OO 5989 did not run the same all year. Its best quarter was Apr–Jun 2026 at 63.6% on time and its weakest Jul–Sep 2025 at 34.6%, a swing of 29 points on roughly 81 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 flights34.6%
Oct–Dec 202582 flights53.1%
Jan–Mar 202677 flights60.8%
Apr–Jun 202677 flights63.6%

Scale runs 25% to 70%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5989 ranged from 48.0% on Friday to 57.4% on Thursday. With about 46 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 5989 runs late

One category carries most of the weight here. National Airspace System accounts for 44% of the 11,000 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.

National Airspace System
44%
Carrier
28%
Late-arriving aircraft
26%
Extreme weather
2%

44% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 4,779 minutes out of 11,000, against a national NAS share of 21%. The split is drawn from 10,979 delay minutes reported on OO 5989.

Cancellations sit at 1.86% against a national 1.81%, which is ordinary. Diversions add another 1.86%.

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. 17.4% 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 one other city pair in the data, including DEN to IDA (41), but none flew often enough under OO 5989 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LBB to DEN only.

One caution: this is a thin sample. 322 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 5989

For a booking, OO 5989 is a flight to put a long connection behind. 17.4% 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