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Ranking & search details
6 nonstop, 34 with 1 connection, 6 with 2 · ranked by overall best · 42 hidden by your Most reliable time setting (they leave at other times of day) · showing the top 3
Most reliable time: midday departures (11 AM–2 PM), the window with the best on-time odds for this trip. Turn off “Most reliable” under Departure time in Advanced settings to see every time.
4 matching trips
Why this is our top pick
- This midday flight leaves in the most reliable time of day on this route: its best departures have an 84% reliability rating vs 54% for afternoon departures.
- Compared with the next-best option (American 3175 on the Boeing 737-800), it flies a newer plane (about 7 vs 16 years old).
- Legroom was comparable across the flights we compared (30–31 in), so it didn't set them apart.
Aircraft and legroom reflect the planes each flight has flown recently. Airlines can swap planes and seat maps change, so check the airline’s seat map when you book.
STL → MIA
St Louis to Miami: 1,123 nonstop flights a year
On time (12 months)
84%
Cancelled
0.8%
avg delay 11 min
Best time to leave
Before 9 AM
89% on time vs 72% 3 to 6 PM
Most reliable airline
American
87% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines87%
590 flights · 89% on time as flown · 1.1% cancel
- Envoy Air (sold as American Eagle)83%
87 flights · 82% on time as flown · 0.5% cancel
- Southwest Airlines78%
442 flights · 78% on time as flown · 0.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
508 flights · avg delay 6 min
- 9 AM to noon86%
216 flights · avg delay 9 min
- Noon to 3 PM79%
144 flights · avg delay 14 min
- 3 to 6 PM72%
82 flights · avg delay 13 min
- 6 to 9 PM75%
173 flights · avg delay 24 min
Best day: Wednesday (88%). Worst: Saturday (72%).
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