Flight number record
OO 4146
SkyWest Airlines · Nashville to Austin
- Route
- BNA → AUS
- Departs
- 07:05
- Flights
- 253
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4146, 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 4146 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 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.3 hours. That rests on 253 flights, with a median arrival 16 minutes early.
Set against the rest of the country, OO 4146's record is 9 points better than the US average of 77.3%. That gap is worth roughly 91 fewer late arrivals for every thousand flights.
Key figures
On time
86.4%
Arrivals under 15 minutes late, of 250 completed flights
Avg delay
137 min
Across delayed arrivals only, not all flights
Cancelled
1.19%
National rate is 1.89%
1 hour+ late
8.4%
National rate is 8.3%
These figures cover 253 flights between September 2025 and August 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When OO 4146 flies
OO 4146 is scheduled to leave Nashville (BNA) at 07:05 local time and reach Austin (AUS) at 10:07. That slot held for 215 of the 253 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 07:05215 flights85.0%
- Departs 07:1036 flights14.2%
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 07:05 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4146 runs 3 points worse at 86.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
OO 4146 next to BNA to AUS
Every carrier on BNA to AUS combined arrived on time 80.4% of the time across 3,033 flights, so OO 4146 is 6 points ahead of it. SkyWest flew 1,010 flights on the same city pair under all its flight numbers, including this one, and those ran 83.7% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4146thin sample | 253 | 86.4% | 137 min | 1.19% | A |
| All SkyWest Airlines on BNA–AUS | 1,010 | 83.7% | 100 min | 0.50% | B+ |
| All carriers on BNA–AUS | 3,033 | 80.4% | 65 min | 0.53% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4146 quarter by quarter
Quarter by quarter OO 4146 held fairly steady: 84.9% in Jan–Mar 2026, 89.0% in Apr–Jun 2026 and 82.3% 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.
- Oct–Dec 202511 flights—
- Jan–Mar 202689 flights84.9%
- Apr–Jun 202691 flights89.0%
- Jul–Sep 202662 flights82.3%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4146 did best on Tuesday at 94.4% on time and worst on Sunday at 75.0%. Each day rests on about 36 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4146 runs when it is late
OO 4146 often beats the schedule: 133 of 250 completed flights, 53%, arrived 15 minutes or more early. When OO 4146 is late it tends to be very late: 21 of its 34 late arrivals were an hour or more behind, and 13 were two hours or more.
- 15+ min early133 flights53.2%
- Within 15 min83 flights33.2%
- 15–29 min late7 flights2.8%
- 30–59 min late6 flights2.4%
- 1–2 hours late8 flights3.2%
- 2+ hours late13 flights5.2%
Scale runs 0% to 100%.
Share of 250 completed flights by arrival against schedule.
7 of 37 late departures made up the time and arrived on time, 19% of them. Only 4 left on time and still arrived late.
The worst days
Worst days for OO 4146
The latest arrival of the period was on 22 May 2026, 8 hours 49 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 May 2026 | 8 hours 49 minutes | Carrier |
| 18 March 2026 | 8 hours 39 minutes | Carrier |
| 6 July 2026 | 6 hours 24 minutes | Carrier |
| 18 August 2026 | 5 hours 42 minutes | Carrier |
| 17 March 2026 | 4 hours 45 minutes | Carrier |
Delay causes
Why OO 4146 runs late
Carrier accounts for 87% of the 4,653 delay minutes carriers reported here, and the remaining four split what is left.
- 87%Carrier
- 8%Extreme weather
- 4%National Airspace System
The largest share of delay minutes, 87%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,071 of the 4,653 delay minutes reported here. The split is drawn from 4,653 delay minutes reported on OO 4146.
Cancellations sit at 1.19% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.4% 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 2.3 hours, which a normal layover absorbs.
The 756 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.
Every one of the 253 flights under OO 4146 in the data flew BNA to AUS. 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 4146
For a booking, OO 4146 has one of the better records a US domestic flight can show: 86.4% on time and 1.19% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- BNA to AUS, every carrier and departure
- AUS to BNA, the return direction
- Nashville International (BNA) delay statistics
- Austin-Bergstrom International (AUS) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Connecting flights: how much buffer the data says you need
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 ; recomputed monthly. How this data is collected.