Flight number record

OO 5431

SkyWest Airlines · Lincoln to Denver

Route: LNK → DEN
Departs: 17:15
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5431, 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 5431 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 364 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.6%, so OO 5431 runs 15 points behind the country as a whole. Across a thousand flights that is about 150 extra late arrivals.

On time

62.6%

Arrivals under 15 minutes late, of 353 completed flights

Avg delay

85 min

Across delayed arrivals only, not all flights

Cancelled

2.20%

National rate is 1.81%

1 hour+ late

17.3%

National rate is 8.1%

These figures cover 364 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 5431 flies

OO 5431 flies LNK to DEN without a single fixed slot. Its most common scheduled departure was 17:15, used on 113 of 364 flights, with 17:05 (94 flights) and 17:33 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:15113 flights31.0%
Departs 17:0594 flights25.8%
Departs 17:3349 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 17:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 5431 runs 6 points worse at 62.6%. 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 5431 next to LNK to DEN

Every carrier on LNK to DEN combined arrived on time 79.5% of the time across 1,594 flights, so OO 5431 is 17 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 16 points.

OO 5431 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5431thin sample	364	62.6%	85 min	2.20%	D
All SkyWest Airlines on LNK–DEN	1,594	79.5%	98 min	1.00%	B
All carriers on LNK–DEN	1,594	79.5%	98 min	1.00%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5431 quarter by quarter

OO 5431 did not run the same all year. Its best quarter was Oct–Dec 2025 at 78.2% on time and its weakest Jul–Sep 2025 at 40.9%, a swing of 37 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 flights40.9%
Oct–Dec 202591 flights78.2%
Jan–Mar 202690 flights71.6%
Apr–Jun 202691 flights60.0%

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

By weekday, OO 5431 did best on Sunday at 70.8% on time and worst on Thursday at 54.9%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5431 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 11,000 reported delay minutes.

National Airspace System
38%
Late-arriving aircraft
25%
Carrier
19%
Extreme weather
18%

Extreme weather accounts for 18% 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 2.8 times the usual weather exposure. The split is drawn from 11,226 delay minutes reported on OO 5431.

Cancellations sit at 2.20% against a national 1.81%, which is ordinary. Diversions add another 0.82%.

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.

Every one of the 364 flights under OO 5431 in the data flew LNK to DEN. 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. 364 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 5431

For a booking, OO 5431 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