Route on-time record
HOU to LAS: most on-time flights and the best time to fly
Houston (William P. Hobby Airport) to Las Vegas (Harry Reid International Airport). 2,074 nonstop flights in Jun 2025 to May 2026, 81% arrived within 15 minutes and 0.4% were cancelled. The most reliable flight number was Southwest 2887 at 5:30 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
HOU → LAS
Houston to Las Vegas: 2,074 nonstop flights a year
On time (12 months)
81%
Cancelled
0.4%
avg delay 10 min
Best time to leave
Before 9 AM
95% on time vs 62% after 9 PM
Most reliable airline
Southwest
80% chance on time
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 · Southwest 2887
5:30 AM → 6:50 AM3h 20m nonstop
Local times, typical schedule. Last flown 2026-04-06.
96%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 95% on time; After 9 PM: 62%).
- Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).
Limited track record · 33 flights
Find Southwest 2887 fares Opens this date on Aviasales#2 · Southwest 3445
5:20 AM → 6:35 AM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 91% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 95% on time; After 9 PM: 62%).
- Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).
Limited track record · 55 flights
Find Southwest 3445 fares Opens this date on Aviasales#3 · Southwest 1362
8:10 AM → 9:30 AM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-30.
92%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 96% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 95% on time; After 9 PM: 62%).
- Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).
Limited track record · 47 flights
Find Southwest 1362 fares Opens this date on Aviasales#4 · Southwest 2175
8:00 AM → 9:30 AM3h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
91%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 97% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 95% on time; After 9 PM: 62%).
- Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).
Limited track record · 33 flights
Find Southwest 2175 fares Opens this date on Aviasales#5 · Southwest 1370
11:00 AM → 12:25 PM3h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
82%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 87% of the time (15 flights, Jun 2025 to May 2026).
- Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 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 1370 fares Opens this date on Aviasales#6 · Southwest 309
8:50 PM → 10:05 PM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-27.
78%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 79% of the time (14 flights, Jun 2025 to May 2026).
- Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).
- Short track record (14 flights), so its score leans on the airline's record at this hour.
Limited track record · 14 flights
Find Southwest 309 fares Opens this date on Aviasales#7 · Southwest 1509
1:10 PM → 2:25 PM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 69%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 69% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Departs inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
Limited track record · 32 flights
Find Southwest 1509 fares Opens this date on Aviasales#8 · Southwest 1911
1:25 PM → 2:50 PM3h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
76%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 71% of the time (28 flights, Jun 2025 to May 2026).
- Departs inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find Southwest 1911 fares Opens this date on Aviasales#9 · Southwest 2881
8:15 PM → 9:30 PM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
- On time (history)
- 50%
- Cancelled
- 0.0%
- Avg arrival delay
- 25 min
- Arrived on time 50% of the time (8 flights, Jun 2025 to May 2026).
- Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 2881 fares Opens this date on Aviasales#10 · Southwest 2335
12:30 PM → 1:45 PM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-29.
72%
chance on time
- On time (history)
- 57%
- Cancelled
- 0.0%
- Avg arrival delay
- 37 min
- Arrived on time 57% of the time (23 flights, Jun 2025 to May 2026).
- Departs inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
- Lands inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 2335 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines80%
2,074 flights · 81% 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%
659 flights · avg delay 3 min
- 9 AM to noon86%
187 flights · avg delay 7 min
- Noon to 3 PM76%
310 flights · avg delay 14 min
- 3 to 6 PM81%
281 flights · avg delay 10 min
- 6 to 9 PM68%
423 flights · avg delay 15 min
- After 9 PM62%
214 flights · avg delay 21 min
Best day: Saturday (84%). Worst: Thursday (77%).
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.
What delays this route
- Late-arriving aircraft47%
- Airline (crew, maintenance, boarding)32%
- Air traffic control and airport volume17%
- Severe weather3%
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
HOU to LAS questions
- What time of day is best to fly HOU to LAS?
- Before 9 AM: 95% of flights arrived on time, against 62% for departures after 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 HOU to LAS?
- Southwest, with a season-adjusted 80% chance of operating and arriving on time over 2,074 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 HOU to LAS?
- June (71% on time); the best was November (89%), 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 HOU
- LAS to HOU (return)
- HOU to DAL 81%
- HOU to ATL 79%
- HOU to DEN 77%
- HOU to MSY 83%
- HOU to PHX 79%
- HOU to DFW 78%
- HOU to MCO 77%
- HOU to MDW 74%
- HOU to BNA 78%
- HOU to STL 80%
- HOU to BWI 75%
- HOU to AUS 74%
Live status: FAA delays and ground stops