Historical on-time performance
Houston to Washington
Flights on IAH–DCA arrive on time 74% of the time over the last 12 months.
based on 3,061 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.
- United AirlinesOn-time74%Medianon timep9055 minCancel1.0%Flights2,409
- Republic AirwaysOn-time72%Medianon timep9050 minCancel5.0%Flights501
- PSA AirlinesOn-time72%Medianon timep9075 minCancel1.3%Flights151
Why flights run late
Delay causes
- Airline20%
- Weather9%
- Air traffic (NAS)35%
- Late aircraft36%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline8%
- Weather66%
- Air traffic (NAS)26%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 50 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 IAH → 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 · 2,293 flights
- Middays78% on time · p90 40 min · 1,200 flights
- Afternoons70% on time · p90 65 min · 1,939 flights
- Evenings67% on time · p90 65 min · 1,947 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 79% on time.
- Tuesdays79% on time · p90 35 min · 1,133 flights
- Saturdays78% on time · p90 45 min · 733 flights
- Wednesdays76% on time · p90 50 min · 1,127 flights
- Mondays75% on time · p90 45 min · 1,132 flights
- Thursdays74% on time · p90 50 min · 1,122 flights
- Sundays73% on time · p90 50 min · 1,068 flights
- Fridays72% on time · p90 60 min · 1,127 flights
Keep exploring