Flight number record

OO 5431

SkyWest Airlines · Lincoln to Denver

Route: LNK → DEN
Departs: 17:05
Flights: 363
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 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 C. About 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 363 flights, with a median arrival 1 minute early.

The national on-time rate over the same period is 77.3%, so OO 5431 runs 11 points behind the country as a whole. Across a thousand flights that is about 110 extra late arrivals.

On time

66.3%

Arrivals under 15 minutes late, of 350 completed flights

Avg delay

91 min

Across delayed arrivals only, not all flights

Cancelled

2.20%

National rate is 1.89%

1 hour+ late

15.7%

National rate is 8.3%

These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 15.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Schedule

When OO 5431 flies

OO 5431 flies LNK to DEN without a single fixed slot. Its most common scheduled departure was 17:05, used on 134 of 363 flights, with 17:15 (113 flights) next.

Departs 17:05134 flights36.9%
Departs 17:15113 flights31.1%

Scale runs 0% to 100%.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 17:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 5431 runs level with that at 66.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

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Against the route

OO 5431 next to LNK to DEN

Every carrier on LNK to DEN combined arrived on time 80.1% of the time across 1,588 flights, so OO 5431 is 14 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 12 points.

OO 5431 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5431thin sample	363	66.3%	91 min	2.20%	C
All SkyWest Airlines on LNK–DEN	1,588	80.1%	107 min	0.94%	B+
All carriers on LNK–DEN	1,588	80.1%	107 min	0.94%	B+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	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 2026 at 51.8%, a swing of 26 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 202530 flights—
Oct–Dec 202591 flights78.2%
Jan–Mar 202690 flights71.6%
Apr–Jun 202691 flights60.0%
Jul–Sep 202661 flights51.8%

Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5431 did best on Sunday at 72.9% on time and worst on Thursday at 60.8%. Each day rests on about 52 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 5431 runs when it is late

OO 5431 often beats the schedule: 93 of 350 completed flights, 27%, arrived 15 minutes or more early. The 118 late arrivals split 26 under half an hour, 37 between 30 and 60 minutes, and 55 an hour or more.

15+ min early93 flights26.6%
Within 15 min139 flights39.7%
15–29 min late26 flights7.4%
30–59 min late37 flights10.6%
1–2 hours late26 flights7.4%
2+ hours late29 flights8.3%

Scale runs 0% to 100%.

Share of 350 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 91 departures that left 15 minutes late or more, only 4 made it up before arrival. In the other direction, 31 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at DEN.

The worst days

Worst days for OO 5431

The latest arrival of the period was on 19 February 2026, 18 hours 24 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in August 2026.

The latest arrivals of OO 5431 in the period
Date	Arrived late by	Largest filed cause
19 February 2026	18 hours 24 minutes	Extreme weather
13 August 2026	4 hours 57 minutes	National Airspace System
22 July 2026	4 hours 51 minutes	National Airspace System
3 August 2026	4 hours 37 minutes	Extreme weather
4 August 2026	4 hours 31 minutes	Late-arriving aircraft

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
35%
Late-arriving aircraft
23%
Carrier
21%
Extreme weather
21%

Extreme weather accounts for 21% 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 3.5 times the usual weather exposure. The split is drawn from 10,702 delay minutes reported on OO 5431.

Cancellations sit at 2.20% against a national 1.89%, which is ordinary. Diversions add another 1.38%.

Connections and routes

What a delay on this flight costs

15.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.

Every one of the 363 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. 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 5431

For a booking, OO 5431 is a flight to put a long connection behind. 15.7% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures