Flight number record

OO 4238

SkyWest Airlines · Aberdeen to Minneapolis

Route: ABR → MSP
Departs: 06:30
Flights: 365
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4238, 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 4238 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 77.3%. When something does go wrong the average delay runs about 3.1 hours. That rests on 365 flights, with a median arrival 15 minutes early.

Set against the rest of the country, OO 4238's record is 12 points better than the US average of 77.3%. That gap is worth roughly 119 fewer late arrivals for every thousand flights.

On time

89.2%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

184 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.89%

1 hour+ late

7.2%

National rate is 8.3%

These figures cover 365 flights between September 2025 and August 2026. The median arrival is 15 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.

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Schedule

When OO 4238 flies

OO 4238 flies ABR to MSP without a single fixed slot. Its most common scheduled departure was 06:30, used on 154 of 365 flights, with 06:34 (106 flights) and 06:35 (54 flights) next.

Departs 06:30154 flights42.2%
Departs 06:34106 flights29.0%
Departs 06:3554 flights14.8%

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 06:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4238 runs level with that at 89.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

OO 4238 next to ABR to MSP

Every carrier on ABR to MSP combined arrived on time 89.6% of the time across 754 flights, so OO 4238 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 11 points.

OO 4238 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4238	365	89.2%	184 min	0.82%	A+
All SkyWest Airlines on ABR–MSP	754	89.6%	174 min	1.46%	A
All carriers on ABR–MSP	754	89.6%	174 min	1.46%	A
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 4238 quarter by quarter

Quarter by quarter OO 4238 held fairly steady: 86.7% in Jul–Sep 2025, 89.0% in Oct–Dec 2025, 87.6% in Jan–Mar 2026, 88.9% in Apr–Jun 2026 and 93.5% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202530 flights86.7%
Oct–Dec 202592 flights89.0%
Jan–Mar 202690 flights87.6%
Apr–Jun 202691 flights88.9%
Jul–Sep 202662 flights93.5%

Scale runs 80% to 100%.

By weekday, OO 4238 ranged from 86.5% on Friday to 94.2% on Tuesday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late OO 4238 runs when it is late

OO 4238 often beats the schedule: 187 of 362 completed flights, 52%, arrived 15 minutes or more early. When OO 4238 is late it tends to be very late: 26 of its 39 late arrivals were an hour or more behind, and 18 were two hours or more.

15+ min early187 flights51.7%
Within 15 min136 flights37.6%
15–29 min late7 flights1.9%
30–59 min late6 flights1.7%
1–2 hours late8 flights2.2%
2+ hours late18 flights5.0%

Scale runs 0% to 100%.

Share of 362 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 38 departures that left 15 minutes late or more, only 4 made it up before arrival. Only 5 left on time and still arrived late.

The worst days

Worst days for OO 4238

The latest arrival of the period was on 18 December 2025, 17 hours 20 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of OO 4238 in the period
Date	Arrived late by	Largest filed cause
18 December 2025	17 hours 20 minutes	Carrier
18 February 2026	12 hours 15 minutes	Extreme weather
25 January 2026	9 hours 42 minutes	Carrier
24 September 2025	6 hours 34 minutes	Carrier
26 November 2025	6 hours 6 minutes	Carrier

Delay causes

Why OO 4238 runs late

Carrier accounts for 76% of the 7,182 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
76%
Extreme weather
20%
National Airspace System
2%
Security
2%

Extreme weather accounts for 20% 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 3.3 times the usual weather exposure. The split is drawn from 7,182 delay minutes reported on OO 4238.

Cancellations are rare at 0.82%, 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

7.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 3.1 hours, which a normal layover absorbs.

Every one of the 365 flights under OO 4238 in the data flew ABR to MSP. 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. 365 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 4238

For a booking, OO 4238 has one of the better records a US domestic flight can show: 89.2% on time and 0.82% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures