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DelayAtlas

Carrier route record

UAMRY→LAX

United Airlines · Monterey to Los Angeles

Flights
122
Period
September 2025 to August 2026
Share of route
15%
Carriers
2
A+GRADE

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with United Airlines.

United on MRY to LAX 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 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 122 flights, with a median arrival 2 minutes early.

Set against the rest of the country, United's MRY to LAX record is 8 points better than the US average of 77.3%. That gap is worth roughly 79 fewer late arrivals for every thousand flights.

Key figures

On time

85.2%

Arrivals under 15 minutes late, of 122 completed flights

Avg delay

77 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

Whole route

86.6%

Every carrier on MRY to LAX, 839 flights

These figures cover 122 flights between September 2025 and August 2026. The median arrival is 2 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.

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Carrier by carrier

United against every carrier on MRY to LAX

United flew 122 of the 839 flights on MRY to LAX, about 15% of it. Its 85.2% on time is about level with the route as a whole at 86.6%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from SkyWest at 86.8% to United at 85.2%.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on MRY to LAX
AirlineFlightsOn timeAvg delayCancelledGrade
SkyWest Airlines71786.8%64 min0.70%A+
United Airlines (this page)thin sample12285.2%77 min0.00%A+

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.

Departure window

When United runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 122 flights.

There are not enough flights in each departure window to split United's MRY to LAX record by time of day without the percentages moving on noise. The headline rate of 85.2% is the reliable figure here.

Across the year

United on MRY to LAX through the year

  • Apr–Jun 202661 flights88.5%
  • Jul–Sep 202661 flights82.0%

Scale runs 75% to 95%.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 85.2% on time across 122 flights.

Split by quarter, United on MRY to LAX logged 61 flights in Apr–Jun 2026 and 61 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 85.2% annual figure is the one to use.

Arrival by arrival

How late United on MRY to LAX runs when it is late

The 18 late arrivals split 8 under half an hour, 6 between 30 and 60 minutes, and 4 an hour or more.

  • 15+ min early15 flights12.3%
  • Within 15 min89 flights73.0%
  • 15–29 min late8 flights6.6%
  • 30–59 min late6 flights4.9%
  • 1–2 hours late1 flights0.8%
  • 2+ hours late3 flights2.5%

Scale runs 0% to 100%.

Share of 122 completed flights by arrival against schedule.

Only 6 of 122 completed flights left 15 minutes late or more, too few to say how often the time is made up.

The worst days

Worst days for United on MRY to LAX

The latest arrival of the period was on 13 July 2026, 6 hours 53 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of United on MRY to LAX in the period
DateArrived late byLargest filed cause
13 July 20266 hours 53 minutesCarrier
23 August 20263 hours 52 minutesCarrier
4 May 20262 hours 51 minutesCarrier
20 July 20261 hour 45 minutesNational Airspace System
29 May 202655 minutesCarrier

Delay causes

Why United runs late on this route

Carrier accounts for 62% of the 1,390 delay minutes carriers reported here, and the remaining four split what is left.

  • Carrier
    62%
  • National Airspace System
    38%

38% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 523 minutes out of 1,390, against a national NAS share of 21%. The split is drawn from 1,390 reported delay minutes.

The largest share of delay minutes, 62%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 867 of the 1,390 delay minutes reported here.

Cancellations are rare at 0.00%, below the national 1.89% 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 stage length

What a delay here costs

Badly late arrivals are rare here: only 3.3% land an hour or more behind schedule, against 8.3% 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.

At 266 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.

The return leg is a different operation and performs like one: it runs 80.5% on time across 123 flights, 5 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 5 points of difference.

One caution: this is a thin sample. 122 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 United on MRY to LAX

Put together: treat all of this as provisional. 122 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 85.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 122 completed flights over 12 months sit behind that.

Related

Where to go next

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.