Route on-time record
HRL to HOU: most on-time flights and the best time to fly
Harlingen (Valley International Airport) to Houston (William P. Hobby Airport). 1,224 nonstop flights in Jun 2025 to May 2026, 80% arrived within 15 minutes and 0.3% were cancelled. The most reliable flight number was Southwest 329 at 6:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
HRL → HOU
Harlingen to Houston: 1,224 nonstop flights a year
On time (12 months)
80%
Cancelled
0.3%
avg delay 12 min
Best time to leave
Before 9 AM
96% on time vs 65% 6 to 9 PM
Most reliable airline
Southwest
80% chance on time
Lowest nonstop fare seen in the next two months: $173 (Southwest 2667 on 2026-10-27). 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 329
6:00 AM → 7:10 AM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 961; its record covers all of them.
92%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 91% of the time (87 flights, Jun 2025 to May 2026).
- Never cancelled in 87 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; 6 to 9 PM: 65%).
Moderate track record · 87 flights
Find Southwest 329 fares Opens this date on Aviasales#2 · Southwest 2437
10:40 AM → 11:55 AM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-29.
75%
chance on time
- On time (history)
- 64%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 64% of the time (39 flights, Jun 2025 to May 2026).
- Never cancelled in 39 scheduled flights.
- Short track record (39 flights), so its score leans on the airline's record at this hour.
Limited track record · 39 flights
Find Southwest 2437 fares Opens this date on Aviasales#3 · Southwest 3202
12:30 PM → 1:40 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
70%
chance on time
- On time (history)
- 54%
- Cancelled
- 0.0%
- Avg arrival delay
- 34 min
- Arrived on time 54% of the time (28 flights, Jun 2025 to May 2026).
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 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 3202 fares Opens this date on Aviasales#4 · Southwest 2438
5:00 PM → 6:20 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-05-31.
65%
chance on time
- On time (history)
- 56%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 56% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- 55% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 2438 fares Opens this date on Aviasales#5 · Southwest 3244
6:25 PM → 7:40 PM1h 15m nonstop
Local times, typical schedule. Last flown 2026-04-06.
65%
chance on time
- On time (history)
- 42%
- Cancelled
- 0.0%
- Avg arrival delay
- 34 min
- Arrived on time 42% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 65% on time; Before 9 AM: 96%).
- 64% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 33 flights
Find Southwest 3244 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines80%
1,224 flights · 80% on time as flown · 0.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
365 flights · avg delay 4 min
- 9 AM to noon91%
258 flights · avg delay 6 min
- Noon to 3 PM67%
181 flights · avg delay 25 min
- 3 to 6 PM65%
168 flights · avg delay 18 min
- 6 to 9 PM65%
252 flights · avg delay 16 min
Best day: Monday (86%). Worst: Saturday (80%).
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 aircraft48%
- Air traffic control and airport volume29%
- Airline (crew, maintenance, boarding)21%
- 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
HRL to HOU questions
- What time of day is best to fly HRL to HOU?
- Before 9 AM: 96% of flights arrived on time, against 65% 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 HRL to HOU?
- Southwest, with a season-adjusted 80% chance of operating and arriving on time over 1,224 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 HRL to HOU?
- May (69% on time); the best was November (90%), 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 HRL
Live status: FAA delays and ground stops