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Route on-time record

BWI to PIT: most on-time flights and the best time to fly

Baltimore (Baltimore/Washington International Thurgood Marshall Airport) to Pittsburgh (Pittsburgh International Airport). 1,074 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 1.8% were cancelled. The most reliable flight number was Southwest 1573 at 10:45 AM.

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

BWI → PIT

Baltimore to Pittsburgh: 1,074 nonstop flights a year

On time (12 months)

78%

Cancelled

1.8%

avg delay 14 min

Best time to leave

9 AM to noon

90% on time vs 62% after 9 PM

Most reliable airline

Southwest

76% chance on time

Check BWI to PIT fares

Lowest nonstop fare seen in the next two months: $331 (Southwest 4381 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 1573

    10:45 AM → 11:50 AM1h 05m nonstop

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

    87%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 91% of the time (32 flights, Jun 2025 to May 2026).
    • Never cancelled in 32 scheduled flights.
    • Leaves in this route's most on-time window (9 AM to noon: 90% on time; After 9 PM: 62%).
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).

    Limited track record · 32 flights

    Find Southwest 1573 fares Opens this date on Aviasales

  2. #2 · Southwest 470

    10:55 AM → 12:00 PM1h 05m nonstop

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

    87%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    12 min
    • Arrived on time 91% of the time (23 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 90% on time; After 9 PM: 62%).
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
    • 81% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 23 flights

    Find Southwest 470 fares Opens this date on Aviasales

  3. #3 · Southwest 2122

    10:30 AM → 11:35 AM1h 05m nonstop

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

    84%

    chance on time

    On time (history)
    82%
    Cancelled
    0.0%
    Avg arrival delay
    10 min
    • Arrived on time 82% of the time (28 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (9 AM to noon: 90% on time; After 9 PM: 62%).
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
    • Short track record (28 flights), so its score leans on the airline's record at this hour.

    Limited track record · 28 flights

    Find Southwest 2122 fares Opens this date on Aviasales

  4. #4 · Southwest 2726

    5:00 PM → 6:05 PM1h 05m nonstop

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

    74%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
    • Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 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 2726 fares Opens this date on Aviasales

  5. #5 · Southwest 1261

    6:50 PM → 8:00 PM1h 05m nonstop

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

    73%

    chance on time

    On time (history)
    72%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 72% of the time (47 flights, Jun 2025 to May 2026).
    • Never cancelled in 47 scheduled flights.
    • Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (47 flights), so its score leans on the airline's record at this hour.

    Limited track record · 47 flights

    Find Southwest 1261 fares Opens this date on Aviasales

  6. #6 · Southwest 1687

    5:30 PM → 6:35 PM1h 05m nonstop

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

    71%

    chance on time

    On time (history)
    70%
    Cancelled
    0.0%
    Avg arrival delay
    37 min
    • Arrived on time 70% of the time (27 flights, Jun 2025 to May 2026).
    • Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (27 flights), so its score leans on the airline's record at this hour.

    Limited track record · 27 flights

    Find Southwest 1687 fares Opens this date on Aviasales

  7. #7 · Southwest 452

    10:00 PM → 11:10 PM1h 10m nonstop

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

    66%

    chance on time

    On time (history)
    69%
    Cancelled
    0.0%
    Avg arrival delay
    20 min
    • Arrived on time 69% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Leaves in this route's least on-time window (After 9 PM: 62% on time; 9 AM to noon: 90%).
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).

    Limited track record · 55 flights

    Find Southwest 452 fares Opens this date on Aviasales

  8. #8 · Southwest 2405

    10:30 PM → 11:40 PM1h 10m nonstop

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

    63%

    chance on time

    On time (history)
    63%
    Cancelled
    9.1%
    Avg arrival delay
    19 min
    • Arrived on time 63% of the time (30 flights, Jun 2025 to May 2026).
    • Cancelled 9.1% of the time (3 of 33).
    • Leaves in this route's least on-time window (After 9 PM: 62% on time; 9 AM to noon: 90%).
    • Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).

    Limited track record · 30 flights

    Find Southwest 2405 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines76%

    1,074 flights · 78% on time as flown · 1.8% cancel

On time by departure time

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

  • 9 AM to noon90%

    365 flights · avg delay 6 min

  • 3 to 6 PM74%

    297 flights · avg delay 18 min

  • 6 to 9 PM86%

    142 flights · avg delay 6 min

  • After 9 PM62%

    269 flights · avg delay 25 min

Best day: Tuesday (81%). Worst: Sunday (68%).

Smarter routing

Nearby airports that run more on time

  • IAD → PIT 82% chance on time

    Washington Dulles International Airport to Pittsburgh International Airport · 1,282 flights a year · 45 mi from your airports · yours: 76%

    Rank flightsFares

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
84
F
87
M
70
A
82
M
66
J
60
J
51
A
75
S
84
O
81
N
86
D
73

What delays this route

  • Late-arriving aircraft51%
  • Airline (crew, maintenance, boarding)29%
  • Air traffic control and airport volume15%
  • 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

Finding the most reliable connections from BWI to PIT…

BWI to PIT questions

What time of day is best to fly BWI to PIT?
9 AM to noon: 90% of flights arrived on time, against 62% for departures after 9 PM.
Which airline is most on time from BWI to PIT?
Southwest, with a season-adjusted 76% chance of operating and arriving on time over 1,074 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 BWI to PIT?
July (51% 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 BWI

Live status: FAA delays and ground stops