is the most reliable airline on the DCA to STL route with a 89% on-time rate, compared to American Airlines at 71%. Based on 18 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: DCA to STL
Washington to St. Louis — airline reliability comparison
On-Time Rate by Airline
89%
Republic Airways88%
Southwest Airlines79%
PSA Airlines75%
American Airlines71%
DCA to STL Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| MQBest | 89% | 0.0% | 39m | 18 |
| Republic AirwaysYX | 88% | 3.2% | 53m | 894 |
| Southwest AirlinesWN | 79% | 1.5% | 59m | 4,948 |
| PSA AirlinesOH | 75% | 3.9% | 79m | 1,473 |
| American AirlinesAAWorst | 71% | 1.3% | 80m | 983 |
Route Overview
78%
Overall On-Time
66m
Avg Delay
2.1%
Cancel Rate
8,375
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.