Flight number record

OO 3996

SkyWest Airlines · Washington to Minneapolis

Route: IAD → MSP
Departs: 07:00
Flights: 253
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3996, 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 3996 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 13 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.8 hours. That rests on 253 flights, with a median arrival 10 minutes early.

Set against the rest of the country, OO 3996's record is 13 points better than the US average of 77.6%. That gap is worth roughly 126 fewer late arrivals for every thousand flights.

On time

90.2%

Arrivals under 15 minutes late, of 246 completed flights

Avg delay

168 min

Across delayed arrivals only, not all flights

Cancelled

2.37%

National rate is 1.81%

1 hour+ late

6.1%

National rate is 8.1%

These figures cover 253 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 3996 flies

OO 3996 flies IAD to MSP without a single fixed slot. Its most common scheduled departure was 07:00, used on 98 of 253 flights, with 06:00 (80 flights) and 06:15 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:0098 flights38.7%
Departs 06:0080 flights31.6%
Departs 06:1531 flights12.3%

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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 3996 runs level with that at 90.2%. 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 3996 next to IAD to MSP

Every carrier on IAD to MSP combined arrived on time 85.1% of the time across 921 flights, so OO 3996 is 5 points ahead of it. SkyWest flew 819 flights on the same city pair under all its flight numbers, including this one, and those ran 85.1% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 11 points.

OO 3996 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3996thin sample	253	90.2%	168 min	2.37%	A
All SkyWest Airlines on IAD–MSP	819	85.1%	99 min	1.10%	A
All carriers on IAD–MSP	921	85.1%	103 min	1.09%	A
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3996 quarter by quarter

Quarter by quarter OO 3996 held fairly steady: 88.1% in Jul–Sep 2025, 87.1% in Jan–Mar 2026 and 93.3% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202560 flights88.1%
Oct–Dec 202512 flights—
Jan–Mar 202690 flights87.1%
Apr–Jun 202691 flights93.3%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3996 did best on Thursday at 100.0% on time and worst on Wednesday at 82.9%. Each day rests on about 36 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 3996 runs late

One category carries most of the weight here. Carrier accounts for 95% of the 4,040 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.

Carrier
95%
National Airspace System
5%
Extreme weather
0%

The largest share of delay minutes, 95%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,848 of the 4,040 delay minutes reported here. The split is drawn from 4,040 delay minutes reported on OO 3996.

Cancellations sit at 2.37% against a national 1.81%, which is ordinary. Diversions add another 0.40%.

Connections and routes

What a delay on this flight costs

6.1% 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 about 2.8 hours, which a normal layover absorbs.

The 907 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 253 flights under OO 3996 in the data flew IAD 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. 253 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 3996

For a booking, read OO 3996 as 90.2% on time with 2.37% cancelled over 253 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