United Airlines is the most reliable airline on the IAD to FLL route with a 82% on-time rate, compared to Frontier Airlines at 51%. Based on 2,792 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAD to FLL
Washington to Fort Lauderdale — airline reliability comparison
On-Time Rate by Airline
United Airlines82%
Frontier Airlines51%
IAD to FLL Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 82% | 0.9% | 71m | 2,792 |
| Frontier AirlinesF9Worst | 51% | 2.2% | 82m | 72 |
Route Overview
81%
Overall On-Time
73m
Avg Delay
0.9%
Cancel Rate
2,864
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.