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.
FLL → IAD
Fort Lauderdale to Dulles: 743 nonstop flights a year
On time (12 months)
85%
Cancelled
0.4%
avg delay 11 min
Best time to leave
9 AM to noon
90% on time vs 74% 3 to 6 PM
Most reliable airline
United
85% chance on time
Lowest nonstop fare seen in the next two months: $45 (Frontier 2960 on 2026-10-27). 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 · United 2169
8:34 AM → 11:12 AM2h 38m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 89% of the time (225 flights, Jun 2025 to May 2026).
- Never cancelled in 225 scheduled flights.
- Departs outside FLL's trouble window (1 PM to 7 PM, when 70% of its 20 ground stops and delay programs started).
Strong track record · 225 flights
Find United 2169 fares Opens this date on Aviasales#2 · United 1421
12:13 PM → 2:50 PM2h 38m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 754; its record covers all of them.
87%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 88% of the time (88 flights, Jun 2025 to May 2026).
- Never cancelled in 88 scheduled flights.
- Departs outside FLL's trouble window (1 PM to 7 PM, when 70% of its 20 ground stops and delay programs started).
- Lands inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 88 flights
Find United 1421 fares Opens this date on Aviasales#3 · United 2405
6:19 PM → 8:58 PM2h 39m nonstop
Local times, typical schedule. Last flown 2026-05-20.
82%
chance on time
- On time (history)
- 80%
- Cancelled
- 1.0%
- Avg arrival delay
- 25 min
- Arrived on time 80% of the time (97 flights, Jun 2025 to May 2026).
- Departs inside FLL's trouble window: 70% of its 20 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 97 flights
Find United 2405 fares Opens this date on Aviasales#4 · Frontier 2960
5:10 PM → 7:50 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 74% on time; 9 AM to noon: 90%).
- Departs inside FLL's trouble window: 70% of its 20 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (11 flights), so its score leans on the route's record at this hour.
Limited track record · 11 flights
Find Frontier 2960 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines85%
732 flights · 86% on time as flown · 0.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
172 flights · avg delay 6 min
- 9 AM to noon90%
90 flights · avg delay 4 min
- Noon to 3 PM84%
328 flights · avg delay 11 min
- 3 to 6 PM74%
54 flights · avg delay 25 min
- 6 to 9 PM84%
99 flights · avg delay 21 min
Best day: Tuesday (90%). Worst: Sunday (78%).
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