Atlanta to Washington — airline reliability comparison
Republic Airways is the most reliable airline on the ATL to IAD route with a 92% on-time rate, compared to Frontier Airlines at 62%. Based on 88 flights tracked.
This route involves high-congestion airports, which can affect reliability regardless of airline.
Source: Bureau of Transportation Statistics. Updated October 2026.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Republic AirwaysYXBest | 92% | 1.1% | 50m | 88 |
| Southwest AirlinesWN | 89% | 0.0% | 42m | 350 |
| United AirlinesUA | 82% | 1.0% | 76m | 3,974 |
| Delta Air LinesDL | 80% | 1.4% | 67m | 7,547 |
| Frontier AirlinesF9Worst | 62% | 2.9% | 82m | 963 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.