Historical on-time performance
Washington to St. Louis
719 miData through Dec 2025Source: US DOT · BTS
Flights on DCA–STL arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled3.1%of scheduled flights
based on 2,170 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.
- American AirlinesOn-time71%Medianon timep9085 minCancel1.9%Flights257
- Republic AirwaysOn-time79%Medianon timep9030 minCancel5.0%Flights121
- Southwest AirlinesOn-time73%Medianon timep9045 minCancel1.6%Flights1,399
- PSA AirlinesOn-time54%Median5 minp90110 minCancel8.7%Flights393
Why flights run late
Delay causes
- Airline28%
- Weather5%
- Air traffic (NAS)12%
- Late aircraft54%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DCA → STL
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 67% to 87% on time.
- Mornings87% on time · p90 15 min · 1,885 flights
- Middays84% on time · p90 20 min · 1,312 flights
- Afternoons73% on time · p90 45 min · 1,767 flights
- Evenings68% on time · p90 75 min · 1,537 flights
- Overnights67% on time · p90 85 min · 508 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 82% on time.
- Saturdays82% on time · p90 35 min · 673 flights
- Tuesdays80% on time · p90 40 min · 1,090 flights
- Mondays78% on time · p90 40 min · 1,091 flights
- Wednesdays77% on time · p90 40 min · 1,091 flights
- Thursdays76% on time · p90 35 min · 1,069 flights
- Fridays74% on time · p90 50 min · 1,081 flights
- Sundays74% on time · p90 50 min · 914 flights
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