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Reliable Flight Search

Beta

The insider way to pick a flight: on-time records, the odds each connection is made, legroom and the age of the planes that actually fly the route. Things airline sites and the big booking sites don’t show you. US airlines and airports.

Find me the most reliable flights fromtoonreturning(optional)

STL → ECP

St Louis to Panama City Beach: 318 nonstop flights a year

On time (12 months)

78%

Cancelled

0.3%

avg delay 11 min

Best time to leave

Before 9 AM

95% on time vs 60% 6 to 9 PM

Most reliable airline

Southwest

78% chance on time

Check STL to ECP fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Best trips

2 nonstop, 38 with 1 connection · ranked by overall best · published legroom for 40 of 40

  1. Top pick#1 · Nonstop · 1h 45m

    4:35 PM → 6:20 PM

    90

    score

    price

    live on Aviasales

    72%

    arrive on time

    4:35 PM STL → 6:20 PM ECP1h 45m

    Southwest 161

    Boeing 737 MAX 8 or 737-700 · 2–21 yrs oldLegroom 31–36 in · 15.5–17.8 in wide · Economy (all seating types)
    72% on time · 0.7% cancel
    Find Southwest 161 fares Opens this date on Aviasales

  2. #2 · Nonstop · 1h 45m

    5:15 PM → 7:00 PM

    78

    score

    price

    live on Aviasales

    70%

    arrive on time

    5:15 PM STL → 7:00 PM ECP1h 45m

    Southwest 428

    Boeing 737-700 or 737 MAX 8 · 4–23 yrs oldLegroom 31–36 in · 15.5–17.8 in wide · Economy (all seating types)
    70% on time · 0.3% cancel
    Find Southwest 428 fares Opens this date on Aviasales

  3. #3 · 1 connection · 5h 15m · one ticket (Southwest)

    7:35 AM → 12:50 PM

    77

    score

    price

    live on Aviasales

    99%

    connections made

    83%

    arrive on time

    7:35 AM STL → 8:45 AM BNA1h 10m

    Southwest 4668

    Boeing 737 MAX 8 or 737-800 · 1–12 yrs oldLegroom 31–34 in · 15.5–17.8 in wide · Economy (all seating types)
    95% on time · 0.5% cancel
    Connect in BNA · 2h 45m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

    11:30 AM BNA → 12:50 PM ECP1h 20m

    Southwest 3719

    Boeing 737-700 · 18–22 yrs oldLegroom 31–36 in · 15.5–17 in wide · Economy (all seating types)
    84% on time · 0.4% cancel
    Find this Southwest trip Look for Southwest 4668 + Southwest 3719 on Aviasales

  4. #4 · 1 connection · 5h 45m · one ticket (Southwest)

    7:35 AM → 1:20 PM

    74

    score

    price

    live on Aviasales

    99%

    connections made

    83%

    arrive on time

    7:35 AM STL → 8:45 AM BNA1h 10m

    Southwest 4668

    Boeing 737 MAX 8 or 737-800 · 1–12 yrs oldLegroom 31–34 in · 15.5–17.8 in wide · Economy (all seating types)
    95% on time · 0.5% cancel
    Connect in BNA · 3h 15m · 100% chance to make it · same ticket: the airline rebooks you if you miss it

    12:00 PM BNA → 1:20 PM ECP1h 20m

    Southwest 4405

    Boeing 737-700 · 19–22 yrs oldLegroom 31–36 in · 15.5–17 in wide · Economy (all seating types)
    84% on time · 0.3% cancel
    Find this Southwest trip Look for Southwest 4668 + Southwest 4405 on Aviasales

  5. #5 · 1 connection · 4h 18m · one ticket (Delta)

    6:00 AM → 10:23 AM

    73

    score

    price

    live on Aviasales

    95%

    connections made

    83%

    arrive on time

    6:00 AM STL → 8:41 AM ATL1h 41m

    Delta 1524

    Airbus A321 · 5–10 yrs oldLegroom 30–31 in · 17.3–18 in wide · Delta Main
    93% on time · 1.8% cancel
    Connect in ATL · 1h 29m · 98% chance to make it · same ticket: the airline rebooks you if you miss it

    10:10 AM ATL → 10:23 AM ECP1h 08m

    Delta 3045

    Boeing 717 · 22–27 yrs oldLegroom 30–31 in · 17.3–18.1 in wide · Delta Main
    87% on time · 1.4% cancel
    Find this Delta trip Look for Delta 1524 + Delta 3045 on Aviasales

  6. #6 · 1 connection · 5h 45m · one ticket (Southwest)

    7:05 AM → 12:50 PM

    73

    score

    price

    live on Aviasales

    98%

    connections made

    82%

    arrive on time

    7:05 AM STL → 8:15 AM BNA1h 10m

    Southwest 4159

    Boeing 737-800 or 737 MAX 8 · 3–14 yrs oldLegroom 31–34 in · 15.5–17.8 in wide · Economy (all seating types)
    92% on time · 0.7% cancel
    Connect in BNA · 3h 15m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

    11:30 AM BNA → 12:50 PM ECP1h 20m

    Southwest 3719

    Boeing 737-700 · 18–22 yrs oldLegroom 31–36 in · 15.5–17 in wide · Economy (all seating types)
    84% on time · 0.4% cancel
    Find this Southwest trip Look for Southwest 4159 + Southwest 3719 on Aviasales

  7. #7 · 1 connection · 6h 15m · one ticket (Southwest)

    7:05 AM → 1:20 PM

    70

    score

    price

    live on Aviasales

    98%

    connections made

    83%

    arrive on time

    7:05 AM STL → 8:15 AM BNA1h 10m

    Southwest 4159

    Boeing 737-800 or 737 MAX 8 · 3–14 yrs oldLegroom 31–34 in · 15.5–17.8 in wide · Economy (all seating types)
    92% on time · 0.7% cancel
    Connect in BNA · 3h 45m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

    12:00 PM BNA → 1:20 PM ECP1h 20m

    Southwest 4405

    Boeing 737-700 · 19–22 yrs oldLegroom 31–36 in · 15.5–17 in wide · Economy (all seating types)
    84% on time · 0.3% cancel
    Find this Southwest trip Look for Southwest 4159 + Southwest 4405 on Aviasales

  8. #8 · 1 connection · 5h 36m · one ticket (Delta)

    7:05 AM → 12:45 PM

    61

    score

    price

    live on Aviasales

    95%

    connections made

    81%

    arrive on time

    7:05 AM STL → 9:39 AM ATL1h 34m

    Delta 1536

    Boeing 737-900ER or Airbus A321 · 8–12 yrs oldLegroom 30–32 in · 17.3–18 in wide · Delta Main
    96% on time · 1.7% cancel
    Connect in ATL · 3h 00m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

    12:39 PM ATL → 12:45 PM ECP1h 02m

    Delta 1359

    Boeing 717 · 21–26 yrs oldLegroom 30–32 in · 17.3–18.1 in wide · Delta Main
    86% on time · 2.3% cancel
    Find this Delta trip Look for Delta 1536 + Delta 1359 on Aviasales

  9. #9 · 1 connection · 3h 25m · one ticket (Southwest)

    9:55 AM → 1:20 PM

    56

    score

    price

    live on Aviasales

    81%

    connections made

    68%

    arrive on time

    9:55 AM STL → 11:05 AM BNA1h 10m

    Southwest 3456

    Boeing 737-700 · 8–21 yrs oldLegroom 31–36 in · 15.5–17.8 in wide · Economy (all seating types)
    86% on time · 0.6% cancel
    Connect in BNA · 55m · 81% chance to make it · same ticket: the airline rebooks you if you miss it

    12:00 PM BNA → 1:20 PM ECP1h 20m

    Southwest 4405

    Boeing 737-700 · 19–22 yrs oldLegroom 31–36 in · 15.5–17 in wide · Economy (all seating types)
    84% on time · 0.3% cancel
    Find this Southwest trip Look for Southwest 3456 + Southwest 4405 on Aviasales

  10. #10 · 1 connection · 6h 41m · one ticket (Delta)

    6:00 AM → 12:45 PM

    55

    score

    price

    live on Aviasales

    95%

    connections made

    81%

    arrive on time

    6:00 AM STL → 8:41 AM ATL1h 41m

    Delta 1524

    Airbus A321 · 5–10 yrs oldLegroom 30–31 in · 17.3–18 in wide · Delta Main
    93% on time · 1.8% cancel
    Connect in ATL · 3h 58m · 99% chance to make it · same ticket: the airline rebooks you if you miss it

    12:39 PM ATL → 12:45 PM ECP1h 02m

    Delta 1359

    Boeing 717 · 21–26 yrs oldLegroom 30–32 in · 17.3–18.1 in wide · Delta Main
    86% on time · 2.3% cancel
    Find this Delta trip Look for Delta 1524 + Delta 1359 on Aviasales

Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes. Legroom is the seat pitch the airline or a seat-map source publishes for that aircraft and cabin; we never estimate it, and seat maps change, so check the airline’s seat map when you book.

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines78%

    318 flights · 78% on time as flown · 0.3% cancel

On time by departure time

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

  • Before 9 AM95%

    94 flights · avg delay 2 min

  • 9 AM to noon74%

    62 flights · avg delay 12 min

  • 3 to 6 PM73%

    86 flights · avg delay 17 min

  • 6 to 9 PM60%

    52 flights · avg delay 19 min

Best day: Thursday (86%). Worst: Sunday (74%).

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