Flight number record

UA 679

United Airlines · Cleveland to Los Angeles

Route: CLE → LAX
Departs: 15:42
Flights: 310
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s UA 679, check with United Airlines.

UA 679 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 77.3%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 310 flights, with a median arrival 11 minutes early.

Set against the rest of the country, UA 679's record is 13 points better than the US average of 77.3%. That gap is worth roughly 130 fewer late arrivals for every thousand flights.

On time

90.3%

Arrivals under 15 minutes late, of 309 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

1 hour+ late

1.9%

National rate is 8.3%

These figures cover 310 flights between September 2025 and August 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.

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Schedule

When UA 679 flies

UA 679 flies CLE to LAX without a single fixed slot. Its most common scheduled departure was 15:42, used on 79 of 310 flights, with 15:35 (37 flights) and 15:20 (36 flights) next.

Departs 15:4279 flights25.5%
Departs 15:3537 flights11.9%
Departs 15:2036 flights11.6%

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 15:42 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 679 runs 18 points better at 90.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

UA 679 next to CLE to LAX

Every carrier on CLE to LAX combined arrived on time 83.7% of the time across 759 flights, so UA 679 is 7 points ahead of it. United flew 640 flights on the same city pair under all its flight numbers, including this one, and those ran 88.1% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 12 points.

UA 679 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 679thin sample	310	90.3%	51 min	0.00%	A+
All United Airlines on CLE–LAX	640	88.1%	47 min	0.31%	A+
All carriers on CLE–LAX	759	83.7%	50 min	0.40%	B+
United Airlines, whole network	830,825	78.8%	73 min	1.02%	B

Across the year

UA 679 quarter by quarter

Quarter by quarter UA 679 held fairly steady: 92.6% in Oct–Dec 2025, 86.7% in Jan–Mar 2026, 88.0% in Apr–Jun 2026 and 94.0% 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.

Jul–Sep 202520 flights—
Oct–Dec 202581 flights92.6%
Jan–Mar 202683 flights86.7%
Apr–Jun 202675 flights88.0%
Jul–Sep 202651 flights94.0%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 679 ranged from 84.0% on Friday to 93.3% on Tuesday. With about 44 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late UA 679 runs when it is late

UA 679 often beats the schedule: 117 of 309 completed flights, 38%, arrived 15 minutes or more early. The 30 late arrivals split 13 under half an hour, 11 between 30 and 60 minutes, and 6 an hour or more.

15+ min early117 flights37.9%
Within 15 min162 flights52.4%
15–29 min late13 flights4.2%
30–59 min late11 flights3.6%
1–2 hours late2 flights0.6%
2+ hours late4 flights1.3%

Scale runs 0% to 100%.

Share of 309 completed flights by arrival against schedule.

A late pushback is often recovered here: of 30 departures that left 15 minutes late or more, 9 still arrived on time. 9 flights left on time and still arrived late.

The worst days

Worst days for UA 679

The latest arrival of the period was on 13 February 2026, 3 hours 27 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of UA 679 in the period
Date	Arrived late by	Largest filed cause
13 February 2026	3 hours 27 minutes	National Airspace System
14 March 2026	2 hours 49 minutes	Late-arriving aircraft
31 August 2026	2 hours 41 minutes	Late-arriving aircraft
5 January 2026	2 hours 8 minutes	Late-arriving aircraft
15 January 2026	1 hour 28 minutes	Extreme weather

Delay causes

Why UA 679 runs late

Late-arriving aircraft accounts for 43% of the 1,539 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
43%
National Airspace System
28%
Carrier
15%
Extreme weather
13%

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 2.2 times the usual weather exposure. The split is drawn from 1,539 delay minutes reported on UA 679.

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 routes

What a delay on this flight costs

Badly late arrivals are rare here: only 1.9% 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 2,052 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

UA 679 is not only a CLE to LAX flight. It also flew LAX to LAS (263 flights, 79.8% 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. 310 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 UA 679
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
LAX to LASthin sample	263	79.8%	66 min	0.00%	B+

What to do with this

Booking UA 679

For a booking, UA 679 has one of the better records a US domestic flight can show: 90.3% 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 United 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 22 October 2026; recomputed monthly. How this data is collected.

Key figures