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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.

BUF → BWI

Buffalo to Baltimore: 1,732 nonstop flights a year

On time (12 months)

86%

Cancelled

1.6%

avg delay 9 min

Best time to leave

Before 9 AM

94% on time vs 57% 6 to 9 PM

Most reliable airline

Southwest

85% chance on time

Check BUF to BWI fares

Lowest nonstop fare seen in the next two months: $438 (Southwest 830 on 2026-10-18). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Best trips

14 nonstop. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.

  1. Best overall#1 · Nonstop · 1h 15m

    5:45 AM → 7:00 AM

    96%

    arrive on time

    5:45 AM BUF → 7:00 AM BWI1h 15m

    Southwest 914

    Boeing 737 MAX 8 or 737-700 · 1–21 yrs old
    97% on time · 1.1% cancel
    Find Southwest 914 fares Opens this date on Aviasales

  2. #2 · Nonstop · 1h 20m

    6:00 AM → 7:20 AM

    91%

    arrive on time

    6:00 AM BUF → 7:20 AM BWI1h 20m

    Southwest 1272

    Boeing 737-700 · 16–23 yrs old
    92% on time · 1.3% cancel
    Find Southwest 1272 fares Opens this date on Aviasales

  3. #3 · Nonstop · 1h 15m

    9:10 AM → 10:25 AM

    91%

    arrive on time

    9:10 AM BUF → 10:25 AM BWI1h 15m

    Southwest 1279

    Boeing 737-800 or 737-700 · 4–22 yrs old
    92% on time · 1.4% cancel
    Find Southwest 1279 fares Opens this date on Aviasales

  4. #4 · Nonstop · 1h 15m

    12:40 PM → 1:55 PM

    89%

    arrive on time

    12:40 PM BUF → 1:55 PM BWI1h 15m

    Southwest 921

    Boeing 737-800 or 737 MAX 8 · 2–20 yrs old
    90% on time · 1.2% cancel
    Find Southwest 921 fares Opens this date on Aviasales

  5. #5 · Nonstop · 1h 10m

    11:05 AM → 12:15 PM

    88%

    arrive on time

    11:05 AM BUF → 12:15 PM BWI1h 10m

    Southwest 1093 · also flew as 537

    Boeing 737-700 · 2–22 yrs old
    90% on time · 1.9% cancel
    Find Southwest 1093 fares Opens this date on Aviasales

  6. #6 · Nonstop · 1h 10m

    9:20 AM → 10:30 AM

    87%

    arrive on time

    9:20 AM BUF → 10:30 AM BWI1h 10m

    Southwest 920

    Boeing 737 MAX 8 or 737-700 · 2–21 yrs old
    89% on time · 1.1% cancel
    Find Southwest 920 fares Opens this date on Aviasales

  7. #7 · Nonstop · 1h 15m

    1:20 PM → 2:35 PM

    86%

    arrive on time

    1:20 PM BUF → 2:35 PM BWI1h 15m

    Southwest 669

    Boeing 737 MAX 8 or 737-700 · 2–23 yrs old
    88% on time · 1.4% cancel
    Find Southwest 669 fares Opens this date on Aviasales

  8. #8 · Nonstop · 1h 10m

    11:20 AM → 12:30 PM

    86%

    arrive on time

    11:20 AM BUF → 12:30 PM BWI1h 10m

    Southwest 3490

    Boeing 737-700 · 16–23 yrs old
    87% on time · 1.4% cancel
    Find Southwest 3490 fares Opens this date on Aviasales

  9. #9 · Nonstop · 1h 15m

    4:00 PM → 5:15 PM

    81%

    arrive on time

    4:00 PM BUF → 5:15 PM BWI1h 15m

    Southwest 694 · also flew as 2436

    Boeing 737-700 or 737-800 · 3–22 yrs old
    82% on time · 1.6% cancel
    Find Southwest 694 fares Opens this date on Aviasales

  10. #10 · Nonstop · 1h 10m

    12:25 PM → 1:35 PM

    80%

    arrive on time

    12:25 PM BUF → 1:35 PM BWI1h 10m

    Southwest 658

    Boeing 737 MAX 8 or 737-700 · 3–22 yrs old
    81% on time · 1.4% cancel
    Find Southwest 658 fares Opens this date 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.

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines85%

    1,732 flights · 86% on time as flown · 1.6% cancel

On time by departure time

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

  • Before 9 AM94%

    623 flights · avg delay 4 min

  • 9 AM to noon92%

    251 flights · avg delay 5 min

  • Noon to 3 PM85%

    371 flights · avg delay 10 min

  • 3 to 6 PM75%

    422 flights · avg delay 16 min

  • 6 to 9 PM57%

    65 flights · avg delay 28 min

Best day: Tuesday (90%). Worst: Thursday (83%).

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