SJC → LAS Flight Reliability

Right now

Origin · SJCNo disruption reported

Aviation weather is not currently a factor.

Updated 08:53 UTC

San Jose airport profile →

Destination · LASNo disruption reported

Aviation weather is not currently a factor.

Updated 08:56 UTC

Las Vegas airport profile →

Route reliability

July 2023 – July 2026

Route Reliability Score

74/ 100Good

Better than 73% of comparable major US routes (4,598 compared)

Calculated from 13,167 flights. How this is calculated

On-time arrivals

81.1%

10,599 of 13,066

Cancellation rate

0.71%

94 cancelled

Median arrival delay

-6 min

Average 4.9 min

Severe delays

6.2%

60+ minutes late

Delay when late

58 min

Average, when 15+ min late

Flights analyzed

13,167

4 carriers

SJC → LAS arrives on time 81.1% of the time; the return trip, LAS → SJC, arrives on time 80.6% of the time.

SJC → LAS spends 20.5 minutes on the ground on a 386-mile trip: 13.5 minutes from pushback to wheels-up at SJC and 7.0 minutes from touchdown to gate at LAS.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026

What stands out

This route holds up about the same all year, a steadier seasonal pattern than 94% of 3,357 comparable routes.

85.4% on time in its best month (November) against 75.1% in its worst (June).

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 3,357 in the comparison.

Why SJC → LAS flights are cancelled

July 2023 – July 2026

SJC → LAS cancelled 94 of 13,167 scheduled flights — about 1 in every 140. The reason filed most often was the airline, 42.6% of the cancellations coded on this route — about 1 in every 329 scheduled flights.

Share of cancellations

Airline42.6%

Weather38.3%

Air traffic19.1%

Security0.0%

Of 94 cancelled departures carrying a reason code.

What each reason means

The airline1 in 329

Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.

40 cancellations, 42.6% of the total.

Extreme weather1 in 366

Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.

36 cancellations, 38.3% of the total.

The air traffic system1 in 732

Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.

18 cancellations, 19.1% of the total.

Security—

A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.

0 cancellations, 0.0% of the total.

Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.

94 coded cancellations were recorded on SJC → LAS; the section appears from 50.

When it goes wrong

July 2023 – July 2026

One arrival in ten is worse than

38 min late

against a median of 6 min early

Arrived an hour or more late6.2%

Typical delay when late58 min

Cancelled0.71%

Landed somewhere else0.05%

Percentiles over 13,167 operations; cancelled and diverted flights are counted separately.

Will your connection be tight enough?

Layovers at LAS after arriving from SJC.

Connection buffer and chance of missing by layover length, SJC → LAS arrivals
Connection time	Chance of missing	Reads as
30 min	34%	Likely to miss
45 min	18%	High risk
60 min	12%	Some risk
90 min	6.1%	Some risk
120 min	3.2%	Low risk

This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.71% of the time and diverts 0.05% of the time, which a late arrival never shows up in.

Chance of missing is the share of 13,066 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.

The worst tenth of arrivals on this route land at least 38 minutes late (90th-percentile gate arrival delay), over 13,167 operations.

Any other layover length: connection checker.

Best time to fly

SJC → LAS flights departing 5–9 AM arrived on time 95.1% of the time, against 71.8% for 3–6 PM departures, a gap of 23.3 percentage points.

By day and hour

On-time arrival rate for each weekday and scheduled departure hour, in local time at the departure airport (SJC).

Hour of departure matters more than day of the week: hourly averages sit a typical 9.6 points from the route-wide rate, weekday averages 5.5 points.

On-time arrival rate for SJC to LAS by weekday and scheduled departure hour, local time. Each button reads out one slot.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM
7 AM–8 AM
8 AM–9 AM
9 AM–10 AM
10 AM–11 AM
11 AM–12 PM
12 PM–1 PM
1 PM–2 PM
2 PM–3 PM
3 PM–4 PM
4 PM–5 PM
5 PM–6 PM
6 PM–7 PM
7 PM–8 PM
8 PM–9 PM
9 PM–10 PM

On-time rate, % · stronger color, fewer on time

50–59
60–69
70–79
80–89
90–99

Fewer than 120 flights, not scored

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · On time is arrival within 15 minutes of schedule. Cells round to whole percentages; the table shows one decimal.

No slot is named best or worst: too few reach 500 flights. Departures before 6 AM and after 10 PM (121 flights) are not drawn: no slot in those hours has enough flights to score.

View as tableHide table

On-time arrival rate (%) with flights beneath, by scheduled departure hour and weekday for SJC to LAS. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM	94.3% on time174 flights	95.8% on time144 flights	113 flights, too few to score	97.6% on time169 flights	95.3% on time173 flights	94.2% on time138 flights	95.8% on time169 flights
7 AM–8 AM	96.1% on time155 flights	94.2% on time139 flights	94.6% on time148 flights	91.7% on time156 flights	98.7% on time159 flights	105 flights, too few to score	98.6% on time140 flights
8 AM–9 AM	94.1% on time136 flights	94.2% on time140 flights	93.5% on time154 flights	95.4% on time130 flights	95.4% on time132 flights	99 flights, too few to score	94.8% on time135 flights
9 AM–10 AM	112 flights, too few to score	98 flights, too few to score	112 flights, too few to score	110 flights, too few to score	112 flights, too few to score	105 flights, too few to score	117 flights, too few to score
10 AM–11 AM	109 flights, too few to score	109 flights, too few to score	98 flights, too few to score	107 flights, too few to score	103 flights, too few to score	104 flights, too few to score	87 flights, too few to score
11 AM–12 PM	104 flights, too few to score	97 flights, too few to score	91 flights, too few to score	108 flights, too few to score	107 flights, too few to score	91 flights, too few to score	115 flights, too few to score
12 PM–1 PM	108 flights, too few to score	78 flights, too few to score	78 flights, too few to score	103 flights, too few to score	102 flights, too few to score	71 flights, too few to score	98 flights, too few to score
1 PM–2 PM	68.1% on time120 flights	88 flights, too few to score	90 flights, too few to score	71.1% on time122 flights	65.0% on time123 flights	87 flights, too few to score	117 flights, too few to score
2 PM–3 PM	66.9% on time127 flights	93 flights, too few to score	94 flights, too few to score	116 flights, too few to score	66.7% on time124 flights	85.6% on time132 flights	92 flights, too few to score
3 PM–4 PM	71.0% on time138 flights	110 flights, too few to score	112 flights, too few to score	52.4% on time144 flights	54.2% on time134 flights	55 flights, too few to score	67.4% on time139 flights
4 PM–5 PM	72.7% on time141 flights	104 flights, too few to score	109 flights, too few to score	61.9% on time127 flights	58.7% on time142 flights	100 flights, too few to score	72.7% on time123 flights
5 PM–6 PM	117 flights, too few to score	116 flights, too few to score	117 flights, too few to score	115 flights, too few to score	114 flights, too few to score	99 flights, too few to score	67.7% on time132 flights
6 PM–7 PM	78.0% on time123 flights	66 flights, too few to score	64 flights, too few to score	108 flights, too few to score	68.9% on time128 flights	45 flights, too few to score	96 flights, too few to score
7 PM–8 PM	77.9% on time152 flights	115 flights, too few to score	114 flights, too few to score	56.8% on time162 flights	68.6% on time155 flights	80.0% on time131 flights	68.2% on time131 flights
8 PM–9 PM	80.7% on time145 flights	108 flights, too few to score	108 flights, too few to score	57.4% on time155 flights	65.5% on time145 flights	88 flights, too few to score	69.7% on time121 flights
9 PM–10 PM	67.7% on time125 flights	74 flights, too few to score	70 flights, too few to score	115 flights, too few to score	64.6% on time131 flights	57 flights, too few to score	69.6% on time159 flights

By departure window

5–9 AM95.1%

9 AM–12 PM87.7%

12–3 PM77.2%

3–6 PM71.8%

6–9 PM73.6%

9 PM–5 AM72.6%

By departure hour

12 AM

3 AM

6 AM

9 AM

12 PM

3 PM

6 PM

9 PM

Why SJC → LAS runs late

July 2023 – July 2026

Late-arriving aircraft44.8%

the inbound aircraft was late, so this flight started late

Air traffic control31.8%

airspace and airport capacity, including weather-driven flow control

The airline21.8%

crew, maintenance, boarding and fueling, all within the carrier’s control

Weather1.5%

weather severe enough to stop this flight specifically

Security0.1%

screening or terminal security incidents

Share of the delay minutes US DOT attributed to each cause for SJC → LAS. Only delays of 15 minutes or more are attributed.

Late-arriving aircraft is the largest cause on SJC → LAS, at 44.8%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 95.1% of the time and 3–6 PM departures 71.8%.

How this route holds up in bad weather

July 2023 – July 2026

The harder-hit end is LAS, where the flight lands. Its figure counts departures from LAS, so it says more about how that airport copes than about this route. Bad weather cancels 2.4 times the normal rate at LAS against 1.6 times at SJC. Cancelled in bad weather against normal hours: SJC 1.0% against 0.6%, LAS 2.0% against 0.8%. Flights that did leave LAS in bad weather arrived on time 58.5% of the time, against 78.5% in normal hours.

Bad weather and normal hours at the airports

Scheduled departures, July 2023 – July 2026

Departures from SJC and LAS in hours of bad weather and in normal hours
Departures from	SJC	LAS
Cancelled in bad weather	1.0%	2.0%
Cancelled in normal hours	0.6%	0.8%
Arrived on time, bad weather	87.4%	58.5%
Arrived on time, normal hours	83.5%	78.5%
Departures in bad weather	4,322	14,522

These are airport figures, not route figures: every scheduled departure from SJC and LAS, to any destination, in hours the weather report called bad.

Weather source and limits. In full: SJC, LAS, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.

Airlines on this route

Carriers with at least 200 flights, by the airline that operated each one.

Airlines on this route
Carrier	Flights	On time	Cancelled	Median delay	Severe
Southwest Airlines	10,351	81.5%	0.71%	-6 min	5.7%
Spirit Airlines	2,079	81.0%	0.67%	-7 min	7.3%
Frontier Airlines	459	73.8%	1.09%	-5 min	10.1%
SkyWest Airlines	258	78.3%	0.00%	-7 min	8.9%

Southwest Airlines flew 78.7% of the 13,147 flights listed. Frontier Airlines cancelled 1.09% of its flights here against 0.00% for SkyWest Airlines.

Southwest Airlines arrived on time 7.7 percentage points more often than Frontier Airlines on this route.

Other ways to fly San Francisco to Las Vegas

Airport pairs in the same two city markets, as the DOT defines them.

Other ways to fly San Francisco to Las Vegas
Route	Flights	On time	Cancelled	Median delay	Score
SFO→LAS San Francisco to Las Vegas	18,263	73.3%	1.01%	-3 min	57
SJC→LAS this route San Jose to Las Vegas	13,167	81.1%	0.71%	-6 min	74
OAK→LAS Oakland to Las Vegas	13,003	78.6%	0.70%	-3 min	71

SJC → LAS is the most reliable pairing for this journey at 81.1% on time, against 73.3% for SFO → LAS.

Flying to LAS from the San Francisco area? Compare SJC, SFO, OAK for LAS, with the same test for what counts as a real difference.

Weekly and seasonal patterns

By day of week

Mon79.9%

Tue88.0%

Wed87.3%

Thu73.9%

Fri75.1%

Sat87.6%

Sun80.1%

Tuesday is historically the most reliable day and Thursday the least, a gap of 14.1 percentage points.

By month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

June is historically the weakest month and November the strongest, a spread of 10.3 percentage points.

Reliability over time

July 2023 – July 2026

24

25

26

Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 80.5% against 82.3% in the 12 months before — declining by 1.8 percentage points.

Data and methodology

Calculated by FlyerIntel from 13,167 SJC → LAS flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.

Full methodology · Data sources · Report a problem

Analysis last recomputed September 26, 2026

SJC airport LAS airport Return direction LAS → SJC

SJC→LAS

Right now

Route reliability

What stands out

Why SJC → LAS flights are cancelled

Share of cancellations

What each reason means

When it goes wrong

Will your connection be tight enough?

Best time to fly

By day and hour

By departure window

By departure hour

Why SJC → LAS runs late

How this route holds up in bad weather

Bad weather and normal hours at the airports

Airlines on this route

Other ways to fly San Francisco to Las Vegas

Weekly and seasonal patterns

By day of week

By month

Reliability over time

Data and methodology