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Route on-time record

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

St Louis (St. Louis Lambert International Airport) to Orlando (Orlando International Airport). 2,494 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was Southwest 2364 at 5:35 AM.

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

STL → MCO

St Louis to Orlando: 2,494 nonstop flights a year

On time (12 months)

78%

Cancelled

0.9%

avg delay 15 min

Best time to leave

Before 9 AM

90% on time vs 67% 3 to 6 PM

Most reliable airline

Southwest

79% chance on time

Check STL to MCO 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 2364

    5:35 AM → 8:55 AM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    92%

    chance on time

    On time (history)
    94%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 94% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 67%).
    • Short track record (33 flights), so its score leans on the airline's record at this hour.

    Limited track record · 33 flights

    Find Southwest 2364 fares Opens this date on Aviasales

  2. #2 · Southwest 417

    5:00 AM → 8:25 AM2h 25m nonstop

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

    91%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 93% 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: 90% on time; 3 to 6 PM: 67%).
    • Short track record (55 flights), so its score leans on the airline's record at this hour.

    Limited track record · 55 flights

    Find Southwest 417 fares Opens this date on Aviasales

  3. #3 · Southwest 3359

    6:40 AM → 10:00 AM2h 20m nonstop

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

    88%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 67%).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 3359 fares Opens this date on Aviasales

  4. #4 · Southwest 3999

    10:15 AM → 1:35 PM2h 20m nonstop

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

    88%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 93% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Lands inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
    • Short track record (55 flights), so its score leans on the airline's record at this hour.

    Limited track record · 55 flights

    Find Southwest 3999 fares Opens this date on Aviasales

  5. #5 · Southwest 4405

    10:25 AM → 1:50 PM2h 25m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    85%

    chance on time

    On time (history)
    88%
    Cancelled
    3.0%
    Avg arrival delay
    7 min
    • Arrived on time 88% of the time (32 flights, Jun 2025 to May 2026).
    • Cancelled 3.0% of the time (1 of 33).
    • Lands inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 PM.
    • Short track record (32 flights), so its score leans on the airline's record at this hour.

    Limited track record · 32 flights

    Find Southwest 4405 fares Opens this date on Aviasales

  6. #6 · Southwest 4500

    7:15 AM → 10:40 AM2h 25m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    84%

    chance on time

    On time (history)
    92%
    Cancelled
    7.7%
    Avg arrival delay
    3 min
    • Arrived on time 92% of the time (12 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 67%).
    • Short track record (12 flights), so its score leans on the airline's record at this hour.

    Limited track record · 12 flights

    Find Southwest 4500 fares Opens this date on Aviasales

  7. #7 · Southwest 3603

    2:05 PM → 5:25 PM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-27.

    83%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 93% of the time (28 flights, Jun 2025 to May 2026).
    • Lands inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 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 3603 fares Opens this date on Aviasales

  8. #8 · Southwest 3061

    8:45 AM → 12:10 PM2h 25m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    82%

    chance on time

    On time (history)
    79%
    Cancelled
    0.0%
    Avg arrival delay
    10 min
    • Arrived on time 79% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 67%).
    • Short track record (33 flights), so its score leans on the airline's record at this hour.

    Limited track record · 33 flights

    Find Southwest 3061 fares Opens this date on Aviasales

  9. #9 · Southwest 2919

    9:00 PM → 12:20 AM2h 20m nonstop

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

    81%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 2919 fares Opens this date on Aviasales

  10. #10 · Southwest 1862

    11:05 AM → 2:25 PM2h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    77%

    chance on time

    On time (history)
    63%
    Cancelled
    0.0%
    Avg arrival delay
    10 min
    • Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
    • Lands inside MCO's trouble window: 76% of its 89 ground stops and delay programs started between 1 PM and 7 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 1862 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines79%

    2,092 flights · 79% on time as flown · 0.6% cancel

  • Frontier Airlines70%

    392 flights · 71% on time as flown · 2.1% cancel

On time by departure time

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

  • Before 9 AM90%

    723 flights · avg delay 7 min

  • 9 AM to noon85%

    302 flights · avg delay 11 min

  • Noon to 3 PM74%

    354 flights · avg delay 19 min

  • 3 to 6 PM67%

    723 flights · avg delay 22 min

  • 6 to 9 PM71%

    382 flights · avg delay 17 min

Best day: Tuesday (83%). Worst: Saturday (73%).

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
77
F
83
M
74
A
84
M
76
J
72
J
69
A
77
S
86
O
83
N
84
D
75

What delays this route

  • Late-arriving aircraft49%
  • Airline (crew, maintenance, boarding)25%
  • Air traffic control and airport volume24%
  • Severe weather2%

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

STL to MCO questions

What time of day is best to fly STL to MCO?
Before 9 AM: 90% of flights arrived on time, against 67% for departures 3 to 6 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 STL to MCO?
Southwest, with a season-adjusted 79% chance of operating and arriving on time over 2,092 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 STL to MCO?
July (69% on time); the best was September (86%), 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 STL

Live status: FAA delays and ground stops