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.
DAL → STL
Dallas to St Louis: 1,913 nonstop flights a year
On time (12 months)
78%
Cancelled
1.4%
avg delay 14 min
Best time to leave
Before 9 AM
91% on time vs 51% after 9 PM
Most reliable airline
Southwest
77% 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 1694
6:00 AM → 7:45 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-29.
91%
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: 91% on time; After 9 PM: 51%).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 1694 fares Opens this date on Aviasales#2 · Southwest 3770
7:45 AM → 9:30 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 94%
- Cancelled
- 1.9%
- Avg arrival delay
- 2 min
- Arrived on time 94% of the time (52 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; After 9 PM: 51%).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
- Short track record (52 flights), so its score leans on the airline's record at this hour.
Limited track record · 52 flights
Find Southwest 3770 fares Opens this date on Aviasales#3 · Southwest 1347
7:55 AM → 9:35 AM1h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
82%
chance on time
- On time (history)
- 78%
- Cancelled
- 3.0%
- Avg arrival delay
- 11 min
- Arrived on time 78% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; After 9 PM: 51%).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
Limited track record · 32 flights
Find Southwest 1347 fares Opens this date on Aviasales#4 · Southwest 2627
11:05 AM → 12:50 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 986, 146; its record covers all of them.
81%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 79% of the time (85 flights, Jun 2025 to May 2026).
- Never cancelled in 86 scheduled flights.
- Departs inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.
Moderate track record · 85 flights
Find Southwest 2627 fares Opens this date on Aviasales#5 · Southwest 519
6:35 PM → 8:20 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-30.
79%
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).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 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 519 fares Opens this date on Aviasales#6 · Southwest 2337
5:00 PM → 6:45 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-04-06.
78%
chance on time
- On time (history)
- 82%
- Cancelled
- 2.9%
- Avg arrival delay
- 10 min
- Arrived on time 82% of the time (68 flights, Jun 2025 to May 2026).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
Moderate track record · 68 flights
Find Southwest 2337 fares Opens this date on Aviasales#7 · Southwest 1925
7:45 PM → 9:25 PM1h 40m nonstop
Local times, typical schedule. Last flown 2026-04-01.
74%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 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 1925 fares Opens this date on Aviasales#8 · Southwest 154
4:10 PM → 5:55 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-30.
74%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 26 min
- Arrived on time 71% of the time (24 flights, Jun 2025 to May 2026).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
- 77% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Southwest 154 fares Opens this date on Aviasales#9 · Southwest 3010
1:00 PM → 2:40 PM1h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
72%
chance on time
- On time (history)
- 64%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 64% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Departs inside DAL's trouble window: 67% of its 42 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 3010 fares Opens this date on Aviasales#10 · Southwest 1342
10:25 PM → 12:05 AM1h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
72%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.0%
- Avg arrival delay
- 24 min
- Arrived on time 70% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (After 9 PM: 51% on time; Before 9 AM: 91%).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
- 79% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 20 flights
Find Southwest 1342 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines77%
1,913 flights · 78% on time as flown · 1.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM91%
466 flights · avg delay 5 min
- 9 AM to noon83%
359 flights · avg delay 11 min
- Noon to 3 PM81%
241 flights · avg delay 11 min
- 3 to 6 PM73%
310 flights · avg delay 18 min
- 6 to 9 PM72%
398 flights · avg delay 19 min
- After 9 PM51%
139 flights · avg delay 37 min
Best day: Tuesday (85%). Worst: Thursday (76%).
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