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.
PBI → IAD
West Palm Beach to Dulles: 333 nonstop flights a year
On time (12 months)
84%
Cancelled
1.2%
avg delay 11 min
Best time to leave
9 AM to noon
88% on time vs 77% 6 to 9 PM
Most reliable airline
United
83% chance on time
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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 · United 2174
9:00 AM → 11:31 AM2h 31m nonstop
Local times, typical schedule. Last flown 2026-04-29. Same departure also flew as United 1813; its record covers all of them.
87%
chance on time
- On time (history)
- 89%
- Cancelled
- 1.3%
- Avg arrival delay
- 7 min
- Arrived on time 89% of the time (76 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 88% on time; 6 to 9 PM: 77%).
- Departs outside PBI's trouble window (11 AM to 5 PM, when 84% of its 31 ground stops and delay programs started).
Moderate track record · 76 flights
Find United 2174 fares Opens this date on Aviasales#2 · United 1407
12:59 PM → 3:30 PM2h 31m nonstop
Local times, typical schedule. Last flown 2026-03-28.
85%
chance on time
- On time (history)
- 91%
- Cancelled
- 4.2%
- Avg arrival delay
- 3 min
- Arrived on time 91% of the time (23 flights, Jun 2025 to May 2026).
- Departs inside PBI's trouble window: 84% of its 31 ground stops and delay programs started between 11 AM and 5 PM.
- Lands inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find United 1407 fares Opens this date on Aviasales#3 · United 2165
12:23 PM → 2:54 PM2h 31m nonstop
Local times, typical schedule. Last flown 2026-05-20.
82%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 81% of the time (53 flights, Jun 2025 to May 2026).
- Never cancelled in 53 scheduled flights.
- Departs inside PBI's trouble window: 84% of its 31 ground stops and delay programs started between 11 AM and 5 PM.
- Lands inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
Limited track record · 53 flights
Find United 2165 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines83%
302 flights · 85% on time as flown · 1.3% cancel
- Republic Airways (sold as American Eagle, Delta Connection or United Express)81%
31 flights · 77% on time as flown · 1.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 9 AM to noon88%
132 flights · avg delay 7 min
- Noon to 3 PM82%
170 flights · avg delay 14 min
- 6 to 9 PM77%
31 flights · avg delay 12 min
Best day: Wednesday (93%). Worst: Sunday (73%).
Smarter routing
Nearby airports that run more on time
FLL → IAD 85% chance on time
Fort Lauderdale Hollywood International Airport to Washington Dulles International Airport · 743 flights a year · 42 mi from your airports · yours: 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