Route profile
SAT→LAS
Flight reliability, delays and best times to fly from San Antonio to Las Vegas, 1,069 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 72% of comparable major US routes (4,598 compared)
Calculated from 6,838 flights. How this is calculated · What counts as on time
SAT → LAS arrives on time 81.4% of the time; the return trip, LAS → SAT, arrives on time 77.0% of the time, a 4.4-point gap between the two directions of the same city pair.
SAT → LAS spends 18.3 minutes on the ground on a 1,069-mile trip: 11.5 minutes from pushback to wheels-up at SAT and 6.8 minutes from touchdown to gate at LAS.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
Which day you fly matters unusually much here, a wider weekday spread than 93% of 4,467 comparable routes.
88.4% on time on a typical Wednesday, against 74.0% on a Friday.
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 4,467 in the comparison.
What sets this route apart
Where SAT to LAS differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
SAT to LAS is at its best against routes of similar length for flights scheduled at 10 PM: 78.5% arrive on time, 15 points ahead of the 63.5% those routes manage at that hour. Against all other routes the gap is 6.8 points.
SAT to LAS holds up on Saturdays better than routes of similar length do: 86.3% on time to their 77.1%, a 9.2 points lead. Against all other routes the gap is 7.2 points.
August is kinder to SAT to LAS than to routes of similar length: 82.5% on time against 74.2%, 8.3 points better. Against all other routes the gap is 6 points.
Spirit Airlines does better on SAT to LAS than on its routes of similar length: 82.3% on time here, 73.7% there, 8.6 points apart. Against all other routes the gap is 7.1 points.
SAT to LAS against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 10 PM departures | 78.5% | routes of similar length | 63.5% | +15.0 pts | 247 here, 28,923 there |
| Weekday: Saturday | 86.3% | routes of similar length | 77.1% | +9.2 pts | 847 here, 381,290 there |
| Month: August | 82.5% | routes of similar length | 74.2% | +8.3 pts | 544 here, 226,647 there |
| Airline: Spirit Airlines | 82.3% | routes of similar length | 73.7% | +8.6 pts | 1,308 here, 184,909 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,069 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why SAT → LAS flights are cancelled
July 2023 – July 2026
SAT → LAS cancelled 54 of 6,838 scheduled flights — about 1 in every 127. The reason filed most often was extreme weather, 44.4% of the cancellations coded on this route — about 1 in every 285 scheduled flights.
Share of cancellations
Of 54 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
24 cancellations, 44.4% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
23 cancellations, 42.6% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
7 cancellations, 13.0% of the total.
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.
54 coded cancellations were recorded on SAT → LAS; the section appears from 50.
When it goes wrong
July 2023 – July 2026
36 min late
against a median of 7 min early
Percentiles over 6,838 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at LAS after arriving from SAT.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 33% | Likely to miss |
| 45 min | 18% | High risk |
| 60 min | 11% | Some risk |
| 90 min | 6.0% | Some risk |
| 120 min | 3.5% | 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 0.79% of the time and diverts 0.13% of the time, which a late arrival never shows up in.
Chance of missing is the share of 6,775 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 36 minutes late (90th-percentile gate arrival delay), over 6,838 operations.
Any other layover length: connection checker.
Best time to fly
SAT → LAS flights departing 5–9 AM arrived on time 94.1% of the time, against 71.8% for 9 PM–5 AM departures, a gap of 22.3 percentage points.
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 90.8% on time from 341 flights
- 6 AM: 95.3% on time from 675 flights
- 7 AM: 94.0% on time from 253 flights
- 8 AM: 96.1% on time from 155 flights
- 9 AM: 89.0% on time from 163 flights
- 10 AM: 89.2% on time from 428 flights
- 11 AM: 91.1% on time from 437 flights
- 12 PM: 85.2% on time from 286 flights
- 1 PM: 84.9% on time from 454 flights
- 2 PM: 75.5% on time from 721 flights
- 3 PM: 79.1% on time from 276 flights
- 4 PM: 75.6% on time from 393 flights
- 5 PM: 69.0% on time from 279 flights
- 6 PM: 74.3% on time from 355 flights
- 7 PM: 73.4% on time from 321 flights
- 8 PM: 69.4% on time from 527 flights
- 9 PM: 67.8% on time from 499 flights
- 10 PM: 78.5% on time from 254 flights
- 11 PM: too few flights to score
Why SAT → LAS runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for SAT → LAS. Only delays of 15 minutes or more are attributed. What the five causes mean
Late-arriving aircraft is the largest cause on SAT → LAS, at 54.6%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 94.1% of the time and 9 PM–5 AM departures 71.8%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Southwest Airlines | 4,598 | 81.8% | 0.41% | -6 min | 5.2% |
| Spirit Airlines | 1,325 | 82.3% | 1.28% | -10 min | 6.9% |
| Frontier Airlines | 880 | 79.5% | 2.05% | -11 min | 9.5% |
Southwest Airlines flew 67.6% of the 6,803 flights listed. Frontier Airlines cancelled 2.05% of its flights here against 0.41% for Southwest Airlines.
Spirit Airlines arrived on time 2.8 percentage points more often than Frontier Airlines on this route.
Weekly and seasonal patterns
By day of week
Wednesday is historically the most reliable day and Friday the least, a gap of 14.4 percentage points.
By month
- Jan: 82.0%
- Feb: 82.8%
- Mar: 82.0%
- Apr: 82.8%
- May: 78.2%
- Jun: 73.5%
- Jul: 73.5%
- Aug: 82.5%
- Sep: 80.3%
- Oct: 87.0%
- Nov: 88.9%
- Dec: 84.6%
June is historically the weakest month and November the strongest, a spread of 15.4 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 73.3% from 176 flights
- August 2023: 78.0% from 174 flights
- September 2023: 81.5% from 173 flights
- October 2023: 88.4% from 200 flights
- November 2023: 87.0% from 185 flights
- December 2023: 82.2% from 203 flights
- January 2024: 79.2% from 187 flights
- February 2024: 79.1% from 174 flights
- March 2024: 78.1% from 195 flights
- April 2024: 86.0% from 179 flights
- May 2024: 80.2% from 203 flights
- June 2024: 73.5% from 197 flights
- July 2024: 61.3% from 200 flights
- August 2024: 82.8% from 217 flights
- September 2024: 80.7% from 197 flights
- October 2024: 90.4% from 210 flights
- November 2024: 89.7% from 213 flights
- December 2024: 87.8% from 196 flights
- January 2025: 84.7% from 173 flights
- February 2025: 86.9% from 169 flights
- March 2025: 82.9% from 211 flights
- April 2025: 83.2% from 196 flights
- May 2025: 81.1% from 213 flights
- June 2025: 83.4% from 177 flights
- July 2025: 90.3% from 180 flights
- August 2025: 87.0% from 161 flights
- September 2025: 78.7% from 189 flights
- October 2025: 81.9% from 200 flights
- November 2025: 89.7% from 196 flights
- December 2025: 83.8% from 205 flights
- January 2026: 82.5% from 137 flights
- February 2026: 82.4% from 131 flights
- March 2026: 85.4% from 165 flights
- April 2026: 78.8% from 163 flights
- May 2026: 72.4% from 175 flights
- June 2026: 62.3% from 157 flights
- July 2026: 70.2% from 161 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 79.8% against 85.3% in the 12 months before — declining by 5.5 percentage points.
Data and methodology
Calculated by FlyerIntel from 6,838 SAT → 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
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed