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Route on-time record

FLL to STL: most on-time flights and the best time to fly

Fort Lauderdale (Fort Lauderdale Hollywood International Airport) to St Louis (St. Louis Lambert International Airport). 853 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.6% were cancelled. The most reliable flight number was Southwest 2693 at 5:50 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

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FLL → STL

Fort Lauderdale to St Louis: 853 nonstop flights a year

On time (12 months)

78%

Cancelled

0.6%

avg delay 13 min

Best time to leave

Before 9 AM

95% on time vs 55% 6 to 9 PM

Most reliable airline

Southwest

78% chance on time

Check FLL to STL fares

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. #1 · Southwest 2693

    5:50 AM → 7:45 AM2h 55m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    92%

    chance on time

    On time (history)
    97%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 97% of the time (39 flights, Jun 2025 to May 2026).
    • Never cancelled in 39 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 95% on time; 6 to 9 PM: 55%).
    • Departs outside FLL's trouble window (1 PM to 7 PM, when 70% of its 20 ground stops and delay programs started).

    Limited track record · 39 flights

    Find Southwest 2693 fares Opens this date on Aviasales

  2. #2 · Southwest 667

    1:05 PM → 3:00 PM2h 55m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    73%

    chance on time

    On time (history)
    67%
    Cancelled
    0.0%
    Avg arrival delay
    17 min
    • Arrived on time 67% of the time (15 flights, Jun 2025 to May 2026).
    • Departs inside FLL's trouble window: 70% of its 20 ground stops and delay programs started between 1 PM and 7 PM.

    Limited track record · 15 flights

    Find Southwest 667 fares Opens this date on Aviasales

  3. #3 · Southwest 2222

    5:25 PM → 7:20 PM2h 55m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    66%

    chance on time

    On time (history)
    62%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 62% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Departs inside FLL's trouble window: 70% of its 20 ground stops and delay programs started between 1 PM and 7 PM.
    • 52% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 55 flights

    Find Southwest 2222 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines78%

    766 flights · 78% on time as flown · 0.4% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM95%

    382 flights · avg delay 4 min

  • 9 AM to noon82%

    102 flights · avg delay 10 min

  • Noon to 3 PM65%

    78 flights · avg delay 17 min

  • 3 to 6 PM59%

    129 flights · avg delay 20 min

  • 6 to 9 PM55%

    161 flights · avg delay 29 min

Best day: Tuesday (83%). Worst: Sunday (69%).

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.

J
76
F
72
M
72
A
82
M
77
J
66
J
68
A
69
S
85
O
80
N
84
D
79

What delays this route

  • Late-arriving aircraft43%
  • Airline (crew, maintenance, boarding)38%
  • Air traffic control and airport volume16%
  • Severe weather3%

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

Finding the most reliable connections from FLL to STL…

FLL to STL questions

What time of day is best to fly FLL to STL?
Before 9 AM: 95% of flights arrived on time, against 55% 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 FLL to STL?
Southwest, with a season-adjusted 78% chance of operating and arriving on time over 766 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 FLL to STL?
June (66% on time); the best was September (85%), 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.

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Live status: FAA delays and ground stops