United Airlines is the most reliable airline on the IAD to TPA route with a 83% on-time rate, compared to Frontier Airlines at 70%. Based on 4,131 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAD to TPA
Washington to Tampa — airline reliability comparison
On-Time Rate by Airline
United Airlines83%
Frontier Airlines70%
IAD to TPA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 83% | 1.1% | 67m | 4,131 |
| Frontier AirlinesF9Worst | 70% | 4.0% | 69m | 334 |
Route Overview
81%
Overall On-Time
68m
Avg Delay
1.3%
Cancel Rate
4,481
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.