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Route on-time record

FAT to LAS: most on-time flights and the best time to fly

Fresno (Fresno Yosemite International Airport) to Las Vegas (Harry Reid International Airport). 1,757 nonstop flights in Jun 2025 to May 2026, 83% arrived within 15 minutes and 0.3% were cancelled. The most reliable flight number was Southwest 3830 at 5:15 AM.

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FAT → LAS

Fresno to Las Vegas: 1,757 nonstop flights a year

On time (12 months)

83%

Cancelled

0.3%

avg delay 14 min

Best time to leave

Before 9 AM

95% on time vs 72% 6 to 9 PM

Most reliable airline

Southwest

85% chance on time

Check FAT to LAS fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · Southwest 3830

    5:15 AM → 6:30 AM1h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    97%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (38 flights, Jun 2025 to May 2026).
    • Never cancelled in 38 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 95% on time; 6 to 9 PM: 72%).

    Limited track record · 38 flights

    Find Southwest 3830 fares Opens this date on Aviasales

  2. #2 · Southwest 4430

    5:30 AM → 6:45 AM1h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    96%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (23 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 95% on time; 6 to 9 PM: 72%).

    Limited track record · 23 flights

    Find Southwest 4430 fares Opens this date on Aviasales

  3. #3 · Southwest 4007

    10:40 AM → 12:05 PM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    92%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 95% of the time (39 flights, Jun 2025 to May 2026).
    • Never cancelled in 39 scheduled flights.
    • Lands inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.

    Limited track record · 39 flights

    Find Southwest 4007 fares Opens this date on Aviasales

  4. #4 · Southwest 2575

    5:30 PM → 6:50 PM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-27.

    80%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 75% of the time (16 flights, Jun 2025 to May 2026).
    • 84% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 16 flights

    Find Southwest 2575 fares Opens this date on Aviasales

  5. #5 · Southwest 2190

    3:20 PM → 4:45 PM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    79%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    13 min
    • Arrived on time 75% of the time (16 flights, Jun 2025 to May 2026).

    Limited track record · 16 flights

    Find Southwest 2190 fares Opens this date on Aviasales

  6. #6 · Allegiant 37

    3:54 PM → 5:09 PM1h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-18. Same departure also flew as Allegiant 12; its record covers all of them.

    77%

    chance on time

    On time (history)
    82%
    Cancelled
    0.0%
    Avg arrival delay
    14 min
    • Arrived on time 82% of the time (67 flights, Jun 2025 to May 2026).
    • Never cancelled in 67 scheduled flights.

    Moderate track record · 67 flights

    Find Allegiant 37 fares Opens this date on Aviasales

  7. #7 · Southwest 2091

    2:55 PM → 4:15 PM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    77%

    chance on time

    On time (history)
    70%
    Cancelled
    0.0%
    Avg arrival delay
    19 min
    • Arrived on time 70% of the time (23 flights, Jun 2025 to May 2026).

    Limited track record · 23 flights

    Find Southwest 2091 fares Opens this date on Aviasales

  8. #8 · Allegiant 34

    2:41 PM → 3:56 PM1h 14m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    74%

    chance on time

    On time (history)
    77%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 77% of the time (26 flights, Jun 2025 to May 2026).
    • Lands inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.

    Limited track record · 26 flights

    Find Allegiant 34 fares Opens this date on Aviasales

  9. #9 · Allegiant 11

    2:05 PM → 3:18 PM1h 13m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    73%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    29 min
    • Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
    • Lands inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.
    • 70% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 8 flights

    Find Allegiant 11 fares Opens this date on Aviasales

  10. #10 · Allegiant 28

    10:21 PM → 11:35 PM1h 15m nonstop

    Local times, typical schedule. Last flown 2026-05-17. Same departure also flew as Allegiant 29; its record covers all of them.

    71%

    chance on time

    On time (history)
    71%
    Cancelled
    0.0%
    Avg arrival delay
    25 min
    • Arrived on time 71% of the time (34 flights, Jun 2025 to May 2026).
    • Never cancelled in 34 scheduled flights.

    Limited track record · 34 flights

    Find Allegiant 28 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines85%

    1,112 flights · 85% on time as flown · 0.3% cancel

  • Allegiant Air79%

    645 flights · 79% on time as flown · 0.4% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM95%

    446 flights · avg delay 6 min

  • 9 AM to noon88%

    435 flights · avg delay 9 min

  • Noon to 3 PM77%

    218 flights · avg delay 20 min

  • 3 to 6 PM74%

    414 flights · avg delay 18 min

  • 6 to 9 PM72%

    159 flights · avg delay 20 min

  • After 9 PM73%

    85 flights · avg delay 30 min

Best day: Saturday (86%). Worst: Thursday (76%).

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
78
F
82
M
80
A
82
M
83
J
77
J
76
A
79
S
79
O
80
N
87
D
84

What delays this route

  • Late-arriving aircraft50%
  • Air traffic control and airport volume22%
  • Airline (crew, maintenance, boarding)21%
  • Severe weather6%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

Finding the most reliable connections from FAT to LAS…

FAT to LAS questions

What time of day is best to fly FAT to LAS?
Before 9 AM: 95% of flights arrived on time, against 72% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from FAT to LAS?
Southwest, with a season-adjusted 85% chance of operating and arriving on time over 1,112 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on FAT to LAS?
July (76% on time); the best was November (87%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from FAT

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Live status: FAA delays and ground stops