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Route on-time record

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

St Louis (St. Louis Lambert International Airport) to Dallas (Dallas Love Field). 1,916 nonstop flights in Jun 2025 to May 2026, 77% arrived within 15 minutes and 1.6% were cancelled. The most reliable flight number was Southwest 2791 at 5:45 AM.

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

STL → DAL

St Louis to Dallas: 1,916 nonstop flights a year

On time (12 months)

77%

Cancelled

1.6%

avg delay 14 min

Best time to leave

Before 9 AM

92% on time vs 62% after 9 PM

Most reliable airline

Southwest

76% chance on time

Check STL to DAL fares

Lowest nonstop fare seen in the next two months: $303 (Southwest 4102 on 2026-10-23). 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 2791

    5:45 AM → 7:35 AM1h 50m nonstop

    Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 2345; its record covers all of them.

    92%

    chance on time

    On time (history)
    97%
    Cancelled
    1.5%
    Avg arrival delay
    1 min
    • Arrived on time 97% of the time (66 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 92% on time; After 9 PM: 62%).

    Moderate track record · 66 flights

    Find Southwest 2791 fares Opens this date on Aviasales

  2. #2 · Southwest 2702

    8:25 AM → 10:15 AM1h 50m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 4632, 3215; its record covers all of them.

    90%

    chance on time

    On time (history)
    93%
    Cancelled
    1.1%
    Avg arrival delay
    7 min
    • Arrived on time 93% of the time (90 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 92% on time; After 9 PM: 62%).
    • Lands inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.

    Moderate track record · 90 flights

    Find Southwest 2702 fares Opens this date on Aviasales

  3. #3 · Southwest 667

    2:25 PM → 4:15 PM1h 50m nonstop

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

    79%

    chance on time

    On time (history)
    93%
    Cancelled
    6.7%
    Avg arrival delay
    5 min
    • Arrived on time 93% of the time (14 flights, Jun 2025 to May 2026).
    • Short track record (14 flights), so its score leans on the airline's record at this hour.

    Limited track record · 14 flights

    Find Southwest 667 fares Opens this date on Aviasales

  4. #4 · Southwest 3684

    12:20 PM → 2:10 PM1h 50m nonstop

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

    78%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 80% of the time (15 flights, Jun 2025 to May 2026).
    • Lands inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.
    • Short track record (15 flights), so its score leans on the airline's record at this hour.

    Limited track record · 15 flights

    Find Southwest 3684 fares Opens this date on Aviasales

  5. #5 · Southwest 1623

    7:50 PM → 9:35 PM1h 45m nonstop

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

    76%

    chance on time

    On time (history)
    77%
    Cancelled
    0.0%
    Avg arrival delay
    15 min
    • Arrived on time 77% of the time (30 flights, Jun 2025 to May 2026).
    • Never cancelled in 30 scheduled flights.
    • Short track record (30 flights), so its score leans on the airline's record at this hour.

    Limited track record · 30 flights

    Find Southwest 1623 fares Opens this date on Aviasales

  6. #6 · Southwest 2533

    11:15 AM → 1:00 PM1h 50m nonstop

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

    75%

    chance on time

    On time (history)
    72%
    Cancelled
    1.9%
    Avg arrival delay
    17 min
    • Arrived on time 72% of the time (53 flights, Jun 2025 to May 2026).
    • Lands inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.
    • Short track record (53 flights), so its score leans on the airline's record at this hour.

    Limited track record · 53 flights

    Find Southwest 2533 fares Opens this date on Aviasales

  7. #7 · Southwest 1473

    4:10 PM → 6:00 PM1h 50m nonstop

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

    68%

    chance on time

    On time (history)
    68%
    Cancelled
    6.7%
    Avg arrival delay
    15 min
    • Arrived on time 68% of the time (28 flights, Jun 2025 to May 2026).
    • Cancelled 6.7% of the time (2 of 30).
    • Short track record (28 flights), so its score leans on the airline's record at this hour.

    Limited track record · 28 flights

    Find Southwest 1473 fares Opens this date on Aviasales

  8. #8 · Southwest 3797

    7:20 PM → 9:10 PM1h 50m nonstop

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

    67%

    chance on time

    On time (history)
    58%
    Cancelled
    0.0%
    Avg arrival delay
    19 min
    • Arrived on time 58% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Short track record (33 flights), so its score leans on the airline's record at this hour.

    Limited track record · 33 flights

    Find Southwest 3797 fares Opens this date on Aviasales

  9. #9 · Southwest 61

    4:35 PM → 6:25 PM1h 50m nonstop

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

    67%

    chance on time

    On time (history)
    63%
    Cancelled
    0.0%
    Avg arrival delay
    52 min
    • Arrived on time 63% of the time (16 flights, Jun 2025 to May 2026).
    • 69% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (16 flights), so its score leans on the airline's record at this hour.

    Limited track record · 16 flights

    Find Southwest 61 fares Opens this date on Aviasales

  10. #10 · Southwest 442

    8:50 PM → 10:40 PM1h 50m nonstop

    Local times, typical schedule. Last flown 2026-04-01.

    67%

    chance on time

    On time (history)
    63%
    Cancelled
    0.0%
    Avg arrival delay
    28 min
    • Arrived on time 63% 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 442 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines76%

    1,916 flights · 77% on time as flown · 1.6% cancel

On time by departure time

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

  • Before 9 AM92%

    586 flights · avg delay 5 min

  • 9 AM to noon85%

    236 flights · avg delay 12 min

  • Noon to 3 PM76%

    334 flights · avg delay 13 min

  • 3 to 6 PM65%

    291 flights · avg delay 22 min

  • 6 to 9 PM65%

    344 flights · avg delay 23 min

  • After 9 PM62%

    125 flights · avg delay 23 min

Best day: Tuesday (84%). Worst: Sunday (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
83
F
87
M
80
A
80
M
72
J
68
J
69
A
80
S
83
O
84
N
80
D
78

What delays this route

  • Late-arriving aircraft44%
  • Airline (crew, maintenance, boarding)32%
  • Air traffic control and airport volume19%
  • Severe weather5%

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 DAL questions

What time of day is best to fly STL to DAL?
Before 9 AM: 92% of flights arrived on time, against 62% for departures after 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 STL to DAL?
Southwest, with a season-adjusted 76% chance of operating and arriving on time over 1,916 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 DAL?
June (68% on time); the best was February (87%), 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