Flight number record

OO 5356

SkyWest Airlines · Denver to Huntsville

Route: DEN → HSV
Departs: 17:25
Flights: 363
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5356, 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 5356 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 363 flights, with a median arrival 3 minutes early.

On time

73.4%

Arrivals under 15 minutes late, of 361 completed flights

Avg delay

83 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.89%

1 hour+ late

10.8%

National rate is 8.3%

These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 10.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Schedule

When OO 5356 flies

OO 5356 flies DEN to HSV without a single fixed slot. Its most common scheduled departure was 17:25, used on 93 of 363 flights, with 17:45 (81 flights) and 17:50 (68 flights) next.

Departs 17:2593 flights25.6%
Departs 17:4581 flights22.3%
Departs 17:5068 flights18.7%

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 17:25 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 5356 runs 5 points better at 73.4%. 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 5356 next to DEN to HSV

Every carrier on DEN to HSV combined arrived on time 80.9% of the time across 728 flights, so OO 5356 is 8 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 5 points.

OO 5356 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5356thin sample	363	73.4%	83 min	0.55%	C+
All SkyWest Airlines on DEN–HSV	728	80.9%	76 min	0.27%	B+
All carriers on DEN–HSV	728	80.9%	76 min	0.27%	B+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 5356 quarter by quarter

OO 5356 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jul–Sep 2026 at 49.2%, a swing of 41 points on roughly 73 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 flights90.0%
Oct–Dec 202591 flights79.1%
Jan–Mar 202690 flights77.8%
Apr–Jun 202691 flights73.6%
Jul–Sep 202661 flights49.2%

Scale runs 40% to 95%.

By weekday, OO 5356 did best on Monday at 83.0% on time and worst on Friday at 67.3%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 5356 runs when it is late

OO 5356 often beats the schedule: 116 of 361 completed flights, 32%, arrived 15 minutes or more early. The 96 late arrivals split 27 under half an hour, 30 between 30 and 60 minutes, and 39 an hour or more.

15+ min early116 flights32.1%
Within 15 min149 flights41.3%
15–29 min late27 flights7.5%
30–59 min late30 flights8.3%
1–2 hours late22 flights6.1%
2+ hours late17 flights4.7%

Scale runs 0% to 100%.

Share of 361 completed flights by arrival against schedule.

12 of 83 late departures made up the time and arrived on time, 14% of them. In the other direction, 25 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 HSV.

The worst days

Worst days for OO 5356

The latest arrival of the period was on 8 July 2026, 13 hours 35 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across July, August and November, with no single month standing out.

The latest arrivals of OO 5356 in the period
Date	Arrived late by	Largest filed cause
8 July 2026	13 hours 35 minutes	Late-arriving aircraft
22 July 2026	5 hours 22 minutes	Extreme weather
22 August 2026	4 hours 59 minutes	Extreme weather
14 August 2026	4 hours 42 minutes	Carrier
30 November 2025	4 hours 23 minutes	Carrier

Delay causes

Why OO 5356 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 7,998 reported delay minutes.

Late-arriving aircraft
36%
Carrier
25%
National Airspace System
23%
Extreme weather
16%

Extreme weather accounts for 16% 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 2.7 times the usual weather exposure. The split is drawn from 7,998 delay minutes reported on OO 5356.

Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

10.8% 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.

The 1,048 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.

Every one of the 363 flights under OO 5356 in the data flew DEN to HSV. 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 5356

For a booking, OO 5356 is one of the weaker ways to fly DEN to HSV: 8 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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