Flight number record

OO 4746

SkyWest Airlines · Nashville to Houston

Route: BNA → IAH
Departs: 06:15
Flights: 323
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4746, 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 4746 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 323 flights, with a median arrival 12 minutes early.

Set against the rest of the country, OO 4746's record is 11 points better than the US average of 77.6%. That gap is worth roughly 105 fewer late arrivals for every thousand flights.

On time

88.1%

Arrivals under 15 minutes late, of 319 completed flights

Avg delay

101 min

Across delayed arrivals only, not all flights

Cancelled

1.24%

National rate is 1.81%

1 hour+ late

5.6%

National rate is 8.1%

These figures cover 323 flights between July 2025 and June 2026. The median arrival is 12 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 4746 flies

OO 4746 flies BNA to IAH without a single fixed slot. Its most common scheduled departure was 06:15, used on 77 of 323 flights, with 08:40 (65 flights) and 08:45 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:1577 flights23.8%
Departs 08:4065 flights20.1%
Departs 08:4538 flights11.8%

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 06:15 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4746 runs level with that at 88.1%. 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 4746 next to BNA to IAH

Every carrier on BNA to IAH combined arrived on time 82.7% of the time across 1,405 flights, so OO 4746 is 5 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 9 points.

OO 4746 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4746thin sample	323	88.1%	101 min	1.24%	A
All SkyWest Airlines on BNA–IAH	395	87.4%	96 min	1.27%	A
All carriers on BNA–IAH	1,405	82.7%	82 min	0.93%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4746 quarter by quarter

OO 4746 did not run the same all year. Its best quarter was Jan–Mar 2026 at 95.3% on time and its weakest Apr–Jun 2026 at 76.0%, a swing of 19 points on roughly 81 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 202592 flights90.1%
Oct–Dec 202592 flights85.9%
Jan–Mar 202689 flights95.3%
Apr–Jun 202650 flights76.0%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4746 ranged from 83.7% on Monday to 93.6% on Tuesday. With about 46 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 4746 runs late

One category carries most of the weight here. Carrier accounts for 66% of the 3,855 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
66%
Late-arriving aircraft
20%
National Airspace System
13%
Extreme weather
1%

The largest share of delay minutes, 66%, 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 2,552 of the 3,855 delay minutes reported here. The split is drawn from 3,855 delay minutes reported on OO 4746.

Cancellations sit at 1.24% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.6% 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 close to two hours, which a normal layover absorbs.

The 657 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.

The same number turns up on three other city pairs in the data, including ORD to RDU (32), ORD to ABQ (6) and ROC to ORD (3), but none flew often enough under OO 4746 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BNA to IAH only.

One caution: this is a thin sample. 323 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 4746

For a booking, OO 4746 has one of the better records a US domestic flight can show: 88.1% on time and 1.24% 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