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.
BWI → PBI
Baltimore to West Palm Beach: 1,233 nonstop flights a year
On time (12 months)
77%
Cancelled
1.3%
avg delay 15 min
Best time to leave
Before 9 AM
87% on time vs 66% 6 to 9 PM
Most reliable airline
Southwest
76% chance on time
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 2328
8:20 AM → 11:00 AM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2719; its record covers all of them.
91%
chance on time
- On time (history)
- 97%
- Cancelled
- 1.1%
- Avg arrival delay
- 4 min
- Arrived on time 97% of the time (87 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; 6 to 9 PM: 66%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
- Lands inside PBI's trouble window: 84% of its 31 ground stops and delay programs started between 11 AM and 5 PM.
Moderate track record · 87 flights
Find Southwest 2328 fares Opens this date on Aviasales#2 · Southwest 2445
11:40 AM → 2:25 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-04-06.
79%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 85% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
- Lands inside PBI's trouble window: 84% of its 31 ground stops and delay programs started between 11 AM and 5 PM.
Limited track record · 33 flights
Find Southwest 2445 fares Opens this date on Aviasales#3 · Southwest 187
12:00 PM → 2:30 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 82% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
- Lands inside PBI's trouble window: 84% of its 31 ground stops and delay programs started between 11 AM and 5 PM.
Limited track record · 55 flights
Find Southwest 187 fares Opens this date on Aviasales#4 · Southwest 3081
2:25 PM → 4:55 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3297; its record covers all of them.
76%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 82% of the time (45 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- Lands inside PBI's trouble window: 84% of its 31 ground stops and delay programs started between 11 AM and 5 PM.
Limited track record · 45 flights
Find Southwest 3081 fares Opens this date on Aviasales#5 · Southwest 2046
3:55 PM → 6:35 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
74%
chance on time
- On time (history)
- 72%
- Cancelled
- 3.0%
- Avg arrival delay
- 27 min
- Arrived on time 72% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- 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 (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find Southwest 2046 fares Opens this date on Aviasales#6 · Southwest 1251
7:40 PM → 10:20 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 14 min
- Arrived on time 78% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 66% on time; Before 9 AM: 87%).
- Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 54 flights
Find Southwest 1251 fares Opens this date on Aviasales#7 · Southwest 185
8:30 PM → 11:05 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-04-06.
64%
chance on time
- On time (history)
- 64%
- Cancelled
- 10.7%
- Avg arrival delay
- 37 min
- Arrived on time 64% of the time (25 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 66% on time; Before 9 AM: 87%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
- 51% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 25 flights
Find Southwest 185 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines76%
1,233 flights · 77% on time as flown · 1.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM87%
330 flights · avg delay 5 min
- 9 AM to noon80%
140 flights · avg delay 14 min
- Noon to 3 PM77%
289 flights · avg delay 15 min
- 3 to 6 PM76%
137 flights · avg delay 19 min
- 6 to 9 PM66%
337 flights · avg delay 22 min
Best day: Tuesday (80%). Worst: Thursday (69%).
Smarter routing
Nearby airports that run more on time
IAD → FLL 83% chance on time
Washington Dulles International Airport to Fort Lauderdale Hollywood International Airport · 742 flights a year · 87 mi from your airports · yours: 76%
IAD → PBI 80% chance on time
Washington Dulles International Airport to Palm Beach International Airport · 334 flights a year · 45 mi from your airports · yours: 76%
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