Flight number record

OO 4126

SkyWest Airlines · Los Angeles to Reno

Route: LAX → RNO
Departs: 15:00
Flights: 359
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4126, 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 4126 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 an hour. That rests on 359 flights, with a median arrival 12 minutes early.

Set against the rest of the country, OO 4126'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 356 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

2.5%

National rate is 8.1%

These figures cover 359 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 4126 flies

OO 4126 flies LAX to RNO without a single fixed slot. Its most common scheduled departure was 15:00, used on 164 of 359 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:00164 flights45.7%

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 15:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 4126 runs 18 points better at 90.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4126 next to LAX to RNO

Every carrier on LAX to RNO combined arrived on time 88.1% of the time across 2,494 flights, so OO 4126 is 2 points ahead of it. SkyWest flew 2,037 flights on the same city pair under all its flight numbers, including this one, and those ran 90.8% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 11 points.

OO 4126 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4126thin sample	359	90.2%	56 min	0.00%	A+
All SkyWest Airlines on LAX–RNO	2,037	90.8%	65 min	0.34%	A+
All carriers on LAX–RNO	2,494	88.1%	59 min	0.44%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4126 quarter by quarter

Quarter by quarter OO 4126 held fairly steady: 91.0% in Jul–Sep 2025, 89.8% in Oct–Dec 2025, 90.9% in Jan–Mar 2026 and 89.0% in Apr–Jun 2026. A spread of 2 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202590 flights91.0%
Oct–Dec 202589 flights89.8%
Jan–Mar 202689 flights90.9%
Apr–Jun 202691 flights89.0%

Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4126 ranged from 86.0% on Wednesday to 94.0% on Sunday. With about 51 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.

Delay causes

Why OO 4126 runs late

One category carries most of the weight here. Carrier accounts for 84% of the 1,971 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
84%
Extreme weather
12%
National Airspace System
4%

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 2.0 times the usual weather exposure. The split is drawn from 1,971 delay minutes reported on OO 4126.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.5% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The same number turns up on one other city pair in the data, including RNO to LAX (174), but none flew often enough under OO 4126 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to RNO only.

One caution: this is a thin sample. 359 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 4126

For a booking, OO 4126 has one of the better records a US domestic flight can show: 90.2% on time and 0.00% 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