Route on-time record
PIT to BWI: most on-time flights and the best time to fly
Pittsburgh (Pittsburgh International Airport) to Baltimore (Baltimore/Washington International Thurgood Marshall Airport). 1,074 nonstop flights in Jun 2025 to May 2026, 85% arrived within 15 minutes and 1.3% were cancelled. The most reliable flight number was Southwest 1550 at 10:05 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
PIT → BWI
Pittsburgh to Baltimore: 1,074 nonstop flights a year
On time (12 months)
85%
Cancelled
1.3%
avg delay 10 min
Best time to leave
Before 9 AM
96% on time vs 60% 6 to 9 PM
Most reliable airline
Southwest
84% chance on time
Lowest nonstop fare seen in the next two months: $117 (Southwest 3539 on 2026-11-07). 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 · Southwest 1550
10:05 AM → 11:10 AM1h 05m nonstop
Local times, typical schedule. Last flown 2026-05-30. Same departure also flew as Southwest 1637; its record covers all of them.
94%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 97% of the time (70 flights, Jun 2025 to May 2026).
- Never cancelled in 70 scheduled flights.
Moderate track record · 70 flights
Find Southwest 1550 fares Opens this date on Aviasales#2 · Southwest 2706
6:00 AM → 7:15 AM1h 15m nonstop
Local times, typical schedule. Last flown 2026-04-06.
94%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 97% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; 6 to 9 PM: 60%).
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 2706 fares Opens this date on Aviasales#3 · Southwest 3942
10:35 AM → 11:40 AM1h 05m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% 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 3942 fares Opens this date on Aviasales#4 · Southwest 2554
5:45 AM → 6:55 AM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 93% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; 6 to 9 PM: 60%).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 2554 fares Opens this date on Aviasales#5 · Southwest 3752
5:00 PM → 6:10 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
64%
chance on time
- On time (history)
- 62%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 62% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- 56% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 55 flights
Find Southwest 3752 fares Opens this date on Aviasales#6 · Southwest 1343
5:55 PM → 7:05 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
64%
chance on time
- On time (history)
- 58%
- Cancelled
- 6.1%
- Avg arrival delay
- 22 min
- Arrived on time 58% of the time (31 flights, Jun 2025 to May 2026).
- Cancelled 6.1% of the time (2 of 33).
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- 58% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 31 flights
Find Southwest 1343 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines84%
1,074 flights · 85% on time as flown · 1.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
365 flights · avg delay 3 min
- 9 AM to noon95%
238 flights · avg delay 3 min
- Noon to 3 PM85%
110 flights · avg delay 12 min
- 3 to 6 PM69%
274 flights · avg delay 19 min
- 6 to 9 PM60%
87 flights · avg delay 28 min
Best day: Tuesday (90%). Worst: Sunday (83%).
Smarter routing
Nearby airports that run more on time
PIT → IAD 87% chance on time
Pittsburgh International Airport to Washington Dulles International Airport · 1,279 flights a year · 45 mi from your airports · yours: 84%
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.
What delays this route
- Late-arriving aircraft54%
- Air traffic control and airport volume22%
- Airline (crew, maintenance, boarding)21%
- Severe weather3%
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
PIT to BWI questions
- What time of day is best to fly PIT to BWI?
- Before 9 AM: 96% of flights arrived on time, against 60% for departures 6 to 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 PIT to BWI?
- Southwest, with a season-adjusted 84% 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 PIT to BWI?
- January (81% on time); the best was November (94%), 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 PIT
- BWI to PIT (return)
- PIT to ORD 78%
- PIT to LGA 80%
- PIT to ATL 90%
- PIT to MCO 79%
- PIT to BOS 79%
- PIT to CLT 84%
- PIT to EWR 87%
- PIT to JFK 87%
- PIT to DEN 81%
- PIT to DFW 79%
- PIT to DCA 69%
- PIT to IAD 88%
Live status: FAA delays and ground stops