Route on-time record
SAT to HOU: most on-time flights and the best time to fly
San Antonio (San Antonio International Airport) to Houston (William P. Hobby Airport). 1,409 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 0.4% were cancelled. The most reliable flight number was Southwest 270 at 5:35 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SAT → HOU
San Antonio to Houston: 1,409 nonstop flights a year
On time (12 months)
74%
Cancelled
0.4%
avg delay 14 min
Best time to leave
Before 9 AM
92% on time vs 57% 6 to 9 PM
Most reliable airline
Southwest
74% 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 270
5:35 AM → 6:40 AM1h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
89%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 95% of the time (19 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 6 to 9 PM: 57%).
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find Southwest 270 fares Opens this date on Aviasales#2 · Southwest 3137
6:20 AM → 7:25 AM1h 05m nonstop
Local times, typical schedule. Last flown 2026-04-04.
89%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 100% of the time (13 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 6 to 9 PM: 57%).
- Short track record (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 3137 fares Opens this date on Aviasales#3 · Southwest 1088
5:55 AM → 6:55 AM1h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 85% 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: 92% on time; 6 to 9 PM: 57%).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 1088 fares Opens this date on Aviasales#4 · Southwest 2451
11:45 AM → 12:45 PM1h 00m nonstop
Local times, typical schedule. Last flown 2026-05-30.
81%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 88% of the time (8 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 (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 2451 fares Opens this date on Aviasales#5 · Southwest 424
3:40 PM → 4:45 PM1h 03m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 24 min
- Arrived on time 63% of the time (16 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.
- 74% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 424 fares Opens this date on Aviasales#6 · Southwest 806
6:25 PM → 7:30 PM1h 05m nonstop
Local times, typical schedule. Last flown 2026-05-30.
69%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 57% on time; Before 9 AM: 92%).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 806 fares Opens this date on Aviasales#7 · Southwest 2570
5:25 PM → 6:25 PM1h 00m nonstop
Local times, typical schedule. Last flown 2026-04-05.
61%
chance on time
- On time (history)
- 62%
- Cancelled
- 0.0%
- Avg arrival delay
- 20 min
- Arrived on time 62% of the time (13 flights, Jun 2025 to May 2026).
- Short track record (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 2570 fares Opens this date on Aviasales#8 · Southwest 3935
1:00 PM → 2:00 PM1h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
60%
chance on time
- On time (history)
- 37%
- Cancelled
- 0.0%
- Avg arrival delay
- 28 min
- Arrived on time 37% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
- Short track record (46 flights), so its score leans on the airline's record at this hour.
Limited track record · 46 flights
Find Southwest 3935 fares Opens this date on Aviasales#9 · Southwest 874
12:50 PM → 1:55 PM1h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
59%
chance on time
- On time (history)
- 39%
- Cancelled
- 0.0%
- Avg arrival delay
- 36 min
- Arrived on time 39% 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 874 fares Opens this date on Aviasales#10 · Southwest 999
6:40 PM → 7:40 PM1h 00m nonstop
Local times, typical schedule. Last flown 2026-04-06.
56%
chance on time
- On time (history)
- 35%
- Cancelled
- 0.0%
- Avg arrival delay
- 38 min
- Arrived on time 35% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 57% on time; Before 9 AM: 92%).
- 72% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Southwest 999 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines74%
1,409 flights · 74% on time as flown · 0.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
513 flights · avg delay 5 min
- 9 AM to noon88%
127 flights · avg delay 6 min
- Noon to 3 PM64%
179 flights · avg delay 17 min
- 3 to 6 PM59%
211 flights · avg delay 23 min
- 6 to 9 PM57%
366 flights · avg delay 24 min
Best day: Tuesday (82%). Worst: Thursday (76%).
Smarter routing
Nearby airports that run more on time
SAT → IAH 81% chance on time
San Antonio International Airport to George Bush Intercontinental Airport · 2,451 flights a year · 24 mi from your airports · yours: 74%
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 aircraft45%
- Air traffic control and airport volume35%
- Airline (crew, maintenance, boarding)19%
- Severe weather1%
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
SAT to HOU questions
- What time of day is best to fly SAT to HOU?
- Before 9 AM: 92% of flights arrived on time, against 57% 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 SAT to HOU?
- Southwest, with a season-adjusted 74% chance of operating and arriving on time over 1,409 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 SAT to HOU?
- July (68% on time); the best was February (88%), 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 SAT
- HOU to SAT (return)
- SAT to DFW 77%
- SAT to ATL 85%
- SAT to DEN 81%
- SAT to DAL 84%
- SAT to PHX 83%
- SAT to IAH 81%
- SAT to LAS 83%
- SAT to ORD 76%
- SAT to LAX 87%
- SAT to CLT 86%
- SAT to MCO 77%
- SAT to SLC 86%
Live status: FAA delays and ground stops