Flight number record

OO 5543

SkyWest Airlines · Jackson to Denver

Route: JAC → DEN
Departs: 10:45
Flights: 359
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5543, 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 5543 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 359 flights, with a median arrival 20 minutes early.

Set against the rest of the country, OO 5543's record is 12 points better than the US average of 77.6%. That gap is worth roughly 124 fewer late arrivals for every thousand flights.

On time

90.0%

Arrivals under 15 minutes late, of 351 completed flights

Avg delay

97 min

Across delayed arrivals only, not all flights

Cancelled

2.23%

National rate is 1.81%

1 hour+ late

3.1%

National rate is 8.1%

These figures cover 359 flights between July 2025 and June 2026. The median arrival is 20 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When OO 5543 flies

OO 5543 flies JAC to DEN without a single fixed slot. Its most common scheduled departure was 10:45, used on 104 of 359 flights, with 10:40 (68 flights) and 10:35 (58 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:45104 flights29.0%
Departs 10:4068 flights18.9%
Departs 10:3558 flights16.2%

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 10:45 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5543 runs 6 points better at 90.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 5543 next to JAC to DEN

Every carrier on JAC to DEN combined arrived on time 77.1% of the time across 1,633 flights, so OO 5543 is 13 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 11 points.

OO 5543 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5543thin sample	359	90.0%	97 min	2.23%	A
All SkyWest Airlines on JAC–DEN	500	86.9%	85 min	2.60%	A
All carriers on JAC–DEN	1,633	77.1%	90 min	1.41%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5543 quarter by quarter

Quarter by quarter OO 5543 held fairly steady: 85.9% in Jul–Sep 2025, 88.5% in Oct–Dec 2025, 90.6% in Jan–Mar 2026 and 95.4% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights85.9%
Oct–Dec 202591 flights88.5%
Jan–Mar 202689 flights90.6%
Apr–Jun 202687 flights95.4%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5543 did best on Saturday at 98.0% on time and worst on Wednesday at 85.4%. Each day rests on about 51 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5543 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 62% of the 3,406 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.

Late-arriving aircraft
62%
Carrier
18%
Extreme weather
11%
National Airspace System
9%

Extreme weather accounts for 11% 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 1.8 times the usual weather exposure. The split is drawn from 3,406 delay minutes reported on OO 5543.

Cancellations sit at 2.23% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.1% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The same number turns up on one other city pair in the data, including SAT to IAH (1), but none flew often enough under OO 5543 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to JAC to DEN only.

One caution: this is a thin sample. 359 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 5543

For a booking, read OO 5543 as 90.0% on time with 2.23% cancelled over 359 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