Carrier route record
WNFAT→LAS
Southwest Airlines · Fresno to Las Vegas
- Flights
- 1,072
- Period
- September 2025 to August 2026
- Share of route
- 63%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Southwest Airlines.
Southwest on FAT to LAS 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 about an hour. That rests on 1,072 flights, with a median arrival 11 minutes early.
Set against the rest of the country, Southwest's FAT to LAS record is 8 points better than the US average of 77.3%. That gap is worth roughly 78 fewer late arrivals for every thousand flights.
Key figures
On time
85.1%
Arrivals under 15 minutes late, of 1,068 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
Whole route
81.6%
Every carrier on FAT to LAS, 1,713 flights
These figures cover 1,072 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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Carrier by carrier
Southwest against every carrier on FAT to LAS
Southwest flew 1,072 of the 1,713 flights on FAT to LAS, most of the route. Its 85.1% on time is 4 points better than the route as a whole, which runs 81.6%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Southwest at 85.1% to Allegiant at 75.7%.
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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines (this page) | 1,072 | 85.1% | 59 min | 0.28% | A+ |
| Allegiant Air | 641 | 75.7% | 94 min | 0.62% | B+ |
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 Southwest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 31 points, against half a point between the best and worst carrier.
- 5am–8am365 flights97.0%
- 8am–11am204 flights93.1%
- 11am–2pm169 flights84.0%
- 2pm–5pm228 flights66.1%
- 5pm–8pm93 flights71.1%
- 8pm–5am13 flights—
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 97.0% of the time, against 66.1% for the afternoon window. That is 31 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 365 flights scheduled in it.
Across the year
Southwest on FAT to LAS through the year
July is the worst month at 75.3% on time, 18 points below April, the best at 93.1%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 93 flights.
Across the week, Saturday is the strongest day at 90.3% on time and Friday the weakest at 78.7%, a spread of 12 points.
Arrival by arrival
How late Southwest on FAT to LAS runs when it is late
Southwest on FAT to LAS often beats the schedule: 372 of 1,068 completed flights, 35%, arrived 15 minutes or more early. The 159 late arrivals split 65 under half an hour, 42 between 30 and 60 minutes, and 52 an hour or more.
- 15+ min early372 flights34.8%
- Within 15 min537 flights50.3%
- 15–29 min late65 flights6.1%
- 30–59 min late42 flights3.9%
- 1–2 hours late34 flights3.2%
- 2+ hours late18 flights1.7%
Scale runs 0% to 100%.
Share of 1,068 completed flights by arrival against schedule.
48 of 191 late departures made up the time and arrived on time, 25% of them. Only 16 left on time and still arrived late.
The worst days
Worst days for Southwest on FAT to LAS
The latest arrival of the period was on 19 March 2026, 5 hours 38 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.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 March 2026 | 5 hours 38 minutes | Carrier |
| 17 January 2026 | 5 hours 35 minutes | Carrier |
| 28 December 2025 | 5 hours 16 minutes | Carrier |
| 16 January 2026 | 4 hours 54 minutes | Extreme weather |
| 14 November 2025 | 3 hours 17 minutes | Carrier |
Delay causes
Why Southwest runs late on this route
Late-arriving aircraft accounts for 51% of the 9,306 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 25%Carrier
- 20%National Airspace System
- 3%Extreme weather
- 1%Security
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 9,306 reported delay minutes here, that single category outweighs weather by 16 to one. The split is drawn from 9,306 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 97.0% on time here.
Cancellations are rare at 0.28%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is 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 4.9% 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 259 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 74.0% on time across 1,072 flights, 11 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 11 points of difference.
One caution: this is a thin sample. 1,072 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 Southwest on FAT to LAS
Put together: treat all of this as provisional. 1,072 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 85.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 1,068 completed flights over 12 months sit behind that.
Related
Where to go next
- FAT to LAS, every carrier
- Southwest on LAS to FAT, the return leg
- Allegiant Air on FAT to LAS75.7%
- Southwest Airlines network-wide record
- Harry Reid International (LAS) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
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.