ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe 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.
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.
Best trips
6 nonstop. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.
Best overall#1 · Nonstop · 1h 05m
10:05 AM → 11:10 AM
94%
arrive on time
95% on time · 0.9% cancel10:05 AM PIT → 11:10 AM BWI1h 05m
Southwest 1550 · also flew as 1637
Boeing 737 MAX 8 or 737-700 · 1–22 yrs oldFind Southwest 1550 fares Opens this date on Aviasales#2 · Nonstop · 1h 15m
6:00 AM → 7:15 AM
94%
arrive on time
95% on time · 1.1% cancel6:00 AM PIT → 7:15 AM BWI1h 15m
Southwest 2706
Boeing 737-700 · 5–22 yrs oldFind Southwest 2706 fares Opens this date on Aviasales#3 · Nonstop · 1h 05m
10:35 AM → 11:40 AM
92%
arrive on time
93% on time · 1.2% cancel10:35 AM PIT → 11:40 AM BWI1h 05m
Southwest 3942
Boeing 737-700 · 3–24 yrs oldFind Southwest 3942 fares Opens this date on Aviasales#4 · Nonstop · 1h 10m
5:45 AM → 6:55 AM
91%
arrive on time
92% on time · 1.0% cancel5:45 AM PIT → 6:55 AM BWI1h 10m
Southwest 2554
Boeing 737-700 or 737 MAX 8 · 2–23 yrs oldFind Southwest 2554 fares Opens this date on Aviasales#5 · Nonstop · 1h 10m
5:00 PM → 6:10 PM
64%
arrive on time
65% on time · 1.0% cancel5:00 PM PIT → 6:10 PM BWI1h 10m
Southwest 3752
Boeing 737-700 or 737 MAX 8 · 3–22 yrs oldFind Southwest 3752 fares Opens this date on Aviasales#6 · Nonstop · 1h 10m
5:55 PM → 7:05 PM
64%
arrive on time
66% on time · 2.2% cancel5:55 PM PIT → 7:05 PM BWI1h 10m
Southwest 1343
Boeing 737 MAX 8 or 737-800 · 1–14 yrs oldFind Southwest 1343 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 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%
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