Flight number record

OO 3766

SkyWest Airlines · Los Angeles to Tucson

Route: LAX → TUS
Departs: 09:35
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3766, 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 3766 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 365 flights, with a median arrival 11 minutes early.

Set against the rest of the country, OO 3766's record is 15 points better than the US average of 77.6%. That gap is worth roughly 154 fewer late arrivals for every thousand flights.

On time

93.0%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

1.64%

National rate is 1.81%

1 hour+ late

3.6%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 11 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 3766 flies

OO 3766 flies LAX to TUS without a single fixed slot. Its most common scheduled departure was 09:35, used on 135 of 365 flights, with 09:40 (63 flights) and 09:15 (48 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:35135 flights37.0%
Departs 09:4063 flights17.3%
Departs 09:1548 flights13.2%

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 09:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 3766 runs 9 points better at 93.0%. 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 3766 next to LAX to TUS

Every carrier on LAX to TUS combined arrived on time 80.4% of the time across 2,580 flights, so OO 3766 is 13 points ahead of it. SkyWest flew 2,114 flights on the same city pair under all its flight numbers, including this one, and those ran 83.1% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 14 points.

OO 3766 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3766	365	93.0%	71 min	1.64%	A
All SkyWest Airlines on LAX–TUS	2,114	83.1%	84 min	0.43%	B+
All carriers on LAX–TUS	2,580	80.4%	73 min	0.39%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3766 quarter by quarter

Quarter by quarter OO 3766 held fairly steady: 92.4% in Jul–Sep 2025, 97.7% in Oct–Dec 2025, 91.1% in Jan–Mar 2026 and 91.2% in Apr–Jun 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 202592 flights92.4%
Oct–Dec 202592 flights97.7%
Jan–Mar 202690 flights91.1%
Apr–Jun 202691 flights91.2%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3766 ranged from 86.5% on Monday to 98.1% on Tuesday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 3766 runs late

One category carries most of the weight here. Carrier accounts for 82% of the 1,771 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
82%
Extreme weather
13%
National Airspace System
5%

Extreme weather accounts for 13% 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 2.1 times the usual weather exposure. The split is drawn from 1,771 delay minutes reported on OO 3766.

Cancellations sit at 1.64% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.6% 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 TUS to LAX (232), but none flew often enough under OO 3766 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to TUS only.

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 3766

For a booking, read OO 3766 as 93.0% on time with 1.64% cancelled over 365 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