Flight number record

OO 5378

SkyWest Airlines · Denver to Sioux Falls

Route: DEN → FSD
Departs: 13:30
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5378, 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 5378 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 363 flights, with a median arrival 10 minutes early.

Set against the rest of the country, OO 5378's record is 8 points better than the US average of 77.6%. That gap is worth roughly 82 fewer late arrivals for every thousand flights.

On time

85.8%

Arrivals under 15 minutes late, of 360 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

0.83%

National rate is 1.81%

1 hour+ late

6.7%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 2026. The median arrival is 10 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 5378 flies

OO 5378 flies DEN to FSD without a single fixed slot. Its most common scheduled departure was 13:30, used on 81 of 363 flights, with 13:40 (65 flights) and 13:35 (51 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:3081 flights22.3%
Departs 13:4065 flights17.9%
Departs 13:3551 flights14.0%

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 13:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 5378 runs 7 points better at 85.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5378 next to DEN to FSD

Every carrier on DEN to FSD combined arrived on time 81.6% of the time across 1,831 flights, so OO 5378 is 4 points ahead of it. SkyWest flew 1,307 flights on the same city pair under all its flight numbers, including this one, and those ran 84.7% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 7 points.

OO 5378 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5378thin sample	363	85.8%	74 min	0.83%	A+
All SkyWest Airlines on DEN–FSD	1,307	84.7%	79 min	1.07%	B
All carriers on DEN–FSD	1,831	81.6%	85 min	0.93%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5378 quarter by quarter

Quarter by quarter OO 5378 held fairly steady: 83.7% in Jul–Sep 2025, 85.2% in Oct–Dec 2025, 86.5% in Jan–Mar 2026 and 87.9% in Apr–Jun 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights83.7%
Oct–Dec 202590 flights85.2%
Jan–Mar 202690 flights86.5%
Apr–Jun 202691 flights87.9%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5378 ranged from 80.4% on Thursday to 90.4% on Tuesday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 5378 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 3,772 reported delay minutes.

Carrier
40%
Late-arriving aircraft
35%
National Airspace System
13%
Extreme weather
12%

Extreme weather accounts for 12% 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 1.9 times the usual weather exposure. The split is drawn from 3,772 delay minutes reported on OO 5378.

Cancellations are rare at 0.83%, below the national 1.81% 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

6.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

Every one of the 363 flights under OO 5378 in the data flew DEN to FSD. 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 5378

For a booking, OO 5378 has one of the better records a US domestic flight can show: 85.8% on time and 0.83% cancelled. That is a base rate, not a promise about any single 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