ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.
SAT → DAL
San Antonio to Dallas: 2,717 nonstop flights a year
On time (12 months)
84%
Cancelled
1.2%
avg delay 11 min
Best time to leave
Before 9 AM
97% on time vs 69% 6 to 9 PM
Most reliable airline
Southwest
83% chance on time
Lowest nonstop fare seen in the next two months: $289 (Southwest 3273 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 1700
7:10 AM → 8:25 AM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1544; its record covers all of them.
96%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 69%).
- Short track record (54 flights), so its score leans on the airline's record at this hour.
Limited track record · 54 flights
Find Southwest 1700 fares Opens this date on Aviasales#2 · Southwest 2264
7:00 AM → 8:10 AM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
94%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 69%).
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Southwest 2264 fares Opens this date on Aviasales#3 · Southwest 2780
8:20 AM → 9:30 AM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-27.
93%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (16 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 69%).
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 2780 fares Opens this date on Aviasales#4 · Southwest 3224
5:45 AM → 6:55 AM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-29.
92%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 96% of the time (23 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 6 to 9 PM: 69%).
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 3224 fares Opens this date on Aviasales#5 · Southwest 1285
9:55 AM → 11:10 AM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 96%
- Cancelled
- 1.8%
- Avg arrival delay
- 2 min
- Arrived on time 96% of the time (54 flights, Jun 2025 to May 2026).
- Lands inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (54 flights), so its score leans on the airline's record at this hour.
Limited track record · 54 flights
Find Southwest 1285 fares Opens this date on Aviasales#6 · Southwest 4202
5:25 AM → 6:35 AM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1938; its record covers all of them.
89%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 89% 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: 97% on time; 6 to 9 PM: 69%).
- Short track record (38 flights), so its score leans on the airline's record at this hour.
Limited track record · 38 flights
Find Southwest 4202 fares Opens this date on Aviasales#7 · Southwest 1919
11:40 AM → 12:50 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
89%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 96% of the time (23 flights, Jun 2025 to May 2026).
- Lands inside DAL's trouble window: 67% of its 42 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 1919 fares Opens this date on Aviasales#8 · Southwest 3570
12:20 PM → 1:30 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-01.
88%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Lands inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 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 3570 fares Opens this date on Aviasales#9 · Southwest 3337
11:10 AM → 12:25 PM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-29.
88%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 20 min
- Arrived on time 91% of the time (23 flights, Jun 2025 to May 2026).
- Lands inside DAL's trouble window: 67% of its 42 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 3337 fares Opens this date on Aviasales#10 · Southwest 2591
12:30 PM → 1:40 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-30.
88%
chance on time
- On time (history)
- 91%
- Cancelled
- 4.2%
- Avg arrival delay
- 4 min
- Arrived on time 91% of the time (23 flights, Jun 2025 to May 2026).
- Lands inside DAL's trouble window: 67% of its 42 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 2591 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines83%
2,717 flights · 84% on time as flown · 1.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM97%
624 flights · avg delay 2 min
- 9 AM to noon90%
524 flights · avg delay 7 min
- Noon to 3 PM85%
533 flights · avg delay 9 min
- 3 to 6 PM73%
414 flights · avg delay 16 min
- 6 to 9 PM69%
496 flights · avg delay 21 min
- After 9 PM80%
126 flights · avg delay 17 min
Best day: Tuesday (88%). Worst: Thursday (80%).
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