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Route on-time record

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

Las Vegas (Harry Reid International Airport) to Houston (William P. Hobby Airport). 2,075 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 0.3% were cancelled. The most reliable flight number was Southwest 2605 at 5:15 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

LAS → HOU

Las Vegas to Houston: 2,075 nonstop flights a year

On time (12 months)

74%

Cancelled

0.3%

avg delay 13 min

Best time to leave

Before 9 AM

91% on time vs 55% 6 to 9 PM

Most reliable airline

Southwest

74% chance on time

Check LAS to HOU 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 2605

    5:15 AM → 10:10 AM2h 55m nonstop

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

    94%

    chance on time

    On time (history)
    98%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 98% of the time (48 flights, Jun 2025 to May 2026).
    • Never cancelled in 48 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 55%).
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).

    Limited track record · 48 flights

    Find Southwest 2605 fares Opens this date on Aviasales

  2. #2 · Southwest 3172

    5:00 AM → 9:50 AM2h 50m nonstop

    Local times, typical schedule. Last flown 2026-04-06. Same departure also flew as Southwest 4202; its record covers all of them.

    90%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 88% of the time (32 flights, Jun 2025 to May 2026).
    • Never cancelled in 32 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 55%).
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).

    Limited track record · 32 flights

    Find Southwest 3172 fares Opens this date on Aviasales

  3. #3 · Southwest 2609

    11:55 PM → 4:50 AM2h 55m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3549; its record covers all of them.

    81%

    chance on time

    On time (history)
    81%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 81% of the time (80 flights, Jun 2025 to May 2026).
    • Never cancelled in 80 scheduled flights.
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).

    Moderate track record · 80 flights

    Find Southwest 2609 fares Opens this date on Aviasales

  4. #4 · Southwest 2423

    7:55 AM → 12:55 PM3h 00m nonstop

    Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 371; its record covers all of them.

    79%

    chance on time

    On time (history)
    74%
    Cancelled
    2.3%
    Avg arrival delay
    15 min
    • Arrived on time 74% of the time (42 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 55%).
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
    • Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.

    Limited track record · 42 flights

    Find Southwest 2423 fares Opens this date on Aviasales

  5. #5 · Southwest 546

    8:25 AM → 1:25 PM3h 00m nonstop

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

    79%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 55%).
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
    • Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.

    Limited track record · 8 flights

    Find Southwest 546 fares Opens this date on Aviasales

  6. #6 · Southwest 561

    9:40 AM → 2:45 PM3h 05m nonstop

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

    78%

    chance on time

    On time (history)
    79%
    Cancelled
    0.0%
    Avg arrival delay
    10 min
    • Arrived on time 79% of the time (47 flights, Jun 2025 to May 2026).
    • Never cancelled in 47 scheduled flights.
    • Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
    • Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.

    Limited track record · 47 flights

    Find Southwest 561 fares Opens this date on Aviasales

  7. #7 · Southwest 200

    11:50 AM → 4:55 PM3h 05m nonstop

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

    78%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
    • Departs inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
    • Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 200 fares Opens this date on Aviasales

  8. #8 · Southwest 130

    11:05 AM → 4:10 PM3h 05m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    76%

    chance on time

    On time (history)
    73%
    Cancelled
    0.0%
    Avg arrival delay
    12 min
    • Arrived on time 73% of the time (15 flights, Jun 2025 to May 2026).
    • Departs inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
    • Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
    • Short track record (15 flights), so its score leans on the airline's record at this hour.

    Limited track record · 15 flights

    Find Southwest 130 fares Opens this date on Aviasales

  9. #9 · Southwest 1950

    10:00 AM → 3:00 PM3h 00m nonstop

    Local times, typical schedule. Last flown 2026-04-04.

    71%

    chance on time

    On time (history)
    54%
    Cancelled
    0.0%
    Avg arrival delay
    16 min
    • Arrived on time 54% of the time (13 flights, Jun 2025 to May 2026).
    • Departs inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
    • Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
    • Short track record (13 flights), so its score leans on the airline's record at this hour.

    Limited track record · 13 flights

    Find Southwest 1950 fares Opens this date on Aviasales

  10. #10 · Southwest 2611

    2:35 PM → 7:40 PM3h 05m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    64%

    chance on time

    On time (history)
    67%
    Cancelled
    0.0%
    Avg arrival delay
    12 min
    • Arrived on time 67% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Departs inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
    • Short track record (33 flights), so its score leans on the airline's record at this hour.

    Limited track record · 33 flights

    Find Southwest 2611 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines74%

    2,075 flights · 74% on time as flown · 0.3% cancel

On time by departure time

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

  • Before 9 AM91%

    737 flights · avg delay 4 min

  • 9 AM to noon78%

    250 flights · avg delay 10 min

  • Noon to 3 PM60%

    363 flights · avg delay 21 min

  • 3 to 6 PM66%

    328 flights · avg delay 17 min

  • 6 to 9 PM55%

    316 flights · avg delay 26 min

  • After 9 PM81%

    81 flights · avg delay 9 min

Best day: Saturday (83%). Worst: Friday (72%).

Smarter routing

Nearby airports that run more on time

  • LAS → IAH 82% chance on time

    Harry Reid International Airport to George Bush Intercontinental Airport · 3,483 flights a year · 24 mi from your airports · yours: 74%

    Rank flightsFares

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
82
F
81
M
74
A
80
M
73
J
71
J
67
A
77
S
79
O
74
N
81
D
78

What delays this route

  • Late-arriving aircraft49%
  • Airline (crew, maintenance, boarding)37%
  • Air traffic control and airport volume13%
  • Severe weather2%

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

LAS to HOU questions

What time of day is best to fly LAS to HOU?
Before 9 AM: 91% of flights arrived on time, against 55% 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 LAS to HOU?
Southwest, with a season-adjusted 74% chance of operating and arriving on time over 2,075 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 LAS to HOU?
July (67% on time); the best was January (82%), 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 LAS

Live status: FAA delays and ground stops