Flight number record

OO 4119

SkyWest Airlines · Los Angeles to Phoenix

Route: LAX → PHX
Departs: 07:20
Flights: 360
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4119, 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 4119 lands a B, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 45 minutes on average. That is a workable record, not a spotless one. That rests on 360 flights, with a median arrival 7 minutes early.

Set against the rest of the country, OO 4119's record is 6 points better than the US average of 77.6%. That gap is worth roughly 57 fewer late arrivals for every thousand flights.

On time

83.3%

Arrivals under 15 minutes late, of 353 completed flights

Avg delay

44 min

Across delayed arrivals only, not all flights

Cancelled

1.94%

National rate is 1.81%

1 hour+ late

4.2%

National rate is 8.1%

These figures cover 360 flights between July 2025 and June 2026. The median arrival is 7 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 4119 flies

OO 4119 flies LAX to PHX without a single fixed slot. Its most common scheduled departure was 07:20, used on 79 of 360 flights, with 07:30 (46 flights) and 07:05 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:2079 flights21.9%
Departs 07:3046 flights12.8%
Departs 07:0541 flights11.4%

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 07:20 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4119 runs 6 points worse at 83.3%. 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 4119 next to LAX to PHX

Every carrier on LAX to PHX combined arrived on time 80.9% of the time across 7,608 flights, so OO 4119 is 2 points ahead of it. SkyWest flew 2,590 flights on the same city pair under all its flight numbers, including this one, and those ran 87.2% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 4 points.

OO 4119 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4119thin sample	360	83.3%	44 min	1.94%	B
All SkyWest Airlines on LAX–PHX	2,590	87.2%	59 min	0.73%	A+
All carriers on LAX–PHX	7,608	80.9%	67 min	0.80%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4119 quarter by quarter

OO 4119 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.3% on time and its weakest Jan–Mar 2026 at 67.4%, a swing of 25 points on roughly 90 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 202590 flights90.0%
Oct–Dec 202590 flights83.1%
Jan–Mar 202689 flights67.4%
Apr–Jun 202691 flights92.3%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4119 did best on Wednesday at 92.2% on time and worst on Thursday at 76.5%. Each day rests on about 51 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4119 runs late

One category carries most of the weight here. Carrier accounts for 75% of the 2,567 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
75%
National Airspace System
18%
Extreme weather
7%

The largest share of delay minutes, 75%, 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 1,916 of the 2,567 delay minutes reported here. The split is drawn from 2,567 delay minutes reported on OO 4119.

Cancellations sit at 1.94% 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 4.2% 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.

OO 4119 is not only a LAX to PHX flight. It also flew PHX to LAX (357 flights, 89.1% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 360 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.

Other routes flown as OO 4119
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
PHX to LAXthin sample	357	89.1%	47 min	1.96%	A

What to do with this

Booking OO 4119

For a booking, read OO 4119 as 83.3% on time with 1.94% cancelled over 360 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