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ATIS Alerts Smart Flight Search

Find the flight least likely to be delayed

Beta

We rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.

BNA → BWI

Nashville to Baltimore: 1,855 nonstop flights a year

On time (12 months)

79%

Cancelled

2.2%

avg delay 12 min

Best time to leave

9 AM to noon

94% on time vs 62% after 9 PM

Most reliable airline

Southwest

77% chance on time

Check BNA to BWI 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 548

    9:30 AM → 12:20 PM1h 50m nonstop

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

    90%

    chance on time

    On time (history)
    94%
    Cancelled
    3.6%
    Avg arrival delay
    2 min
    • Arrived on time 94% of the time (53 flights, Jun 2025 to May 2026).
    • Cancelled 3.6% of the time (2 of 55).
    • Leaves in this route's most on-time window (9 AM to noon: 94% on time; After 9 PM: 62%).
    • Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).

    Limited track record · 53 flights

    Find Southwest 548 fares Opens this date on Aviasales

  2. #2 · Southwest 2734

    9:40 AM → 12:25 PM1h 45m nonstop

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

    90%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 95% of the time (19 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 94% on time; After 9 PM: 62%).
    • Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
    • Short track record (19 flights), so its score leans on the airline's record at this hour.

    Limited track record · 19 flights

    Find Southwest 2734 fares Opens this date on Aviasales

  3. #3 · Southwest 1391

    6:00 AM → 8:50 AM1h 50m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    87%

    chance on time

    On time (history)
    90%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 90% of the time (39 flights, Jun 2025 to May 2026).
    • Never cancelled in 39 scheduled flights.
    • Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
    • Short track record (39 flights), so its score leans on the airline's record at this hour.

    Limited track record · 39 flights

    Find Southwest 1391 fares Opens this date on Aviasales

  4. #4 · Southwest 753

    6:45 AM → 9:30 AM1h 45m nonstop

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

    86%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 88% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
    • Short track record (33 flights), so its score leans on the airline's record at this hour.

    Limited track record · 33 flights

    Find Southwest 753 fares Opens this date on Aviasales

  5. #5 · Southwest 867

    6:30 AM → 9:20 AM1h 50m nonstop

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

    85%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    23 min
    • Arrived on time 88% of the time (16 flights, Jun 2025 to May 2026).
    • Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
    • Short track record (16 flights), so its score leans on the airline's record at this hour.

    Limited track record · 16 flights

    Find Southwest 867 fares Opens this date on Aviasales

  6. #6 · Southwest 1324

    1:30 PM → 4:20 PM1h 50m nonstop

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

    74%

    chance on time

    On time (history)
    79%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 79% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Departs inside BNA's trouble window: 64% of its 44 ground stops and delay programs started between 1 PM and 7 PM.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 33 flights

    Find Southwest 1324 fares Opens this date on Aviasales

  7. #7 · Southwest 549

    1:05 PM → 3:55 PM1h 50m nonstop

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

    74%

    chance on time

    On time (history)
    77%
    Cancelled
    0.0%
    Avg arrival delay
    13 min
    • Arrived on time 77% of the time (47 flights, Jun 2025 to May 2026).
    • Never cancelled in 47 scheduled flights.
    • Departs inside BNA's trouble window: 64% of its 44 ground stops and delay programs started between 1 PM and 7 PM.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 47 flights

    Find Southwest 549 fares Opens this date on Aviasales

  8. #8 · Southwest 550

    4:00 PM → 6:50 PM1h 50m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    73%

    chance on time

    On time (history)
    73%
    Cancelled
    0.0%
    Avg arrival delay
    15 min
    • Arrived on time 73% of the time (44 flights, Jun 2025 to May 2026).
    • Never cancelled in 44 scheduled flights.
    • Departs inside BNA's trouble window: 64% of its 44 ground stops and delay programs started between 1 PM and 7 PM.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 44 flights

    Find Southwest 550 fares Opens this date on Aviasales

  9. #9 · Southwest 594

    9:40 PM → 12:30 AM1h 50m nonstop

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

    71%

    chance on time

    On time (history)
    75%
    Cancelled
    0.0%
    Avg arrival delay
    10 min
    • Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (After 9 PM: 62% on time; 9 AM to noon: 94%).
    • Departs outside BNA's trouble window (1 PM to 7 PM, when 64% of its 44 ground stops and delay programs started).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 594 fares Opens this date on Aviasales

  10. #10 · Southwest 748

    6:05 PM → 8:55 PM1h 50m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    70%

    chance on time

    On time (history)
    64%
    Cancelled
    0.0%
    Avg arrival delay
    19 min
    • Arrived on time 64% of the time (39 flights, Jun 2025 to May 2026).
    • Never cancelled in 39 scheduled flights.
    • Departs inside BNA's trouble window: 64% of its 44 ground stops and delay programs started between 1 PM and 7 PM.
    • Short track record (39 flights), so its score leans on the airline's record at this hour.

    Limited track record · 39 flights

    Find Southwest 748 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines77%

    1,763 flights · 79% on time as flown · 2.2% cancel

  • Spirit Airlines76%

    92 flights · 75% on time as flown · 2.6% cancel

On time by departure time

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

  • Before 9 AM94%

    461 flights · avg delay 3 min

  • 9 AM to noon94%

    296 flights · avg delay 4 min

  • Noon to 3 PM73%

    346 flights · avg delay 15 min

  • 3 to 6 PM66%

    269 flights · avg delay 21 min

  • 6 to 9 PM67%

    402 flights · avg delay 19 min

  • After 9 PM62%

    81 flights · avg delay 20 min

Best day: Wednesday (88%). Worst: Sunday (78%).

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