Historical on-time performance
St. Louis to Washington
Flights on STL–DCA arrive on time 70% of the time over the last 12 months.
based on 2,222 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Republic AirwaysOn-time80%Medianon timep9035 minCancel1.1%Flights90
- Southwest AirlinesOn-time71%Medianon timep9050 minCancel1.4%Flights1,399
- PSA AirlinesOn-time70%Medianon timep9065 minCancel6.0%Flights529
- American AirlinesOn-time63%Medianon timep9080 minCancel2.0%Flights204
Why flights run late
Delay causes
- Airline33%
- Weather3%
- Air traffic (NAS)23%
- Late aircraft40%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline9%
- Weather73%
- Air traffic (NAS)18%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 56 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly STL → DCA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 85% on time.
- Mornings85% on time · p90 20 min · 2,755 flights
- Middays75% on time · p90 35 min · 1,291 flights
- Afternoons70% on time · p90 50 min · 1,303 flights
- Overnights65% on time · p90 50 min · 182 flights · limited
- Evenings61% on time · p90 85 min · 1,454 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 81% on time.
- Saturdays81% on time · p90 30 min · 649 flights
- Tuesdays78% on time · p90 35 min · 1,084 flights
- Wednesdays78% on time · p90 35 min · 1,085 flights
- Thursdays74% on time · p90 45 min · 1,077 flights
- Fridays73% on time · p90 50 min · 1,085 flights
- Mondays72% on time · p90 55 min · 1,083 flights
- Sundays70% on time · p90 50 min · 922 flights
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