Historical on-time performance
Denver to Houston
Flights on DEN–IAH arrive on time 78% of the time over the last 12 months.
based on 4,632 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.
- Frontier AirlinesOn-time79%Medianon timep9050 minCancel0.1%Flights778
- United AirlinesOn-time77%Medianon timep9040 minCancel0.3%Flights3,854
Why flights run late
Delay causes
- Airline28%
- Weather2%
- Air traffic (NAS)31%
- Late aircraft39%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline36%
- Weather64%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 14 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 DEN → IAH
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 — 86% on time.
- Mornings86% on time · p90 20 min · 3,811 flights
- Middays77% on time · p90 45 min · 3,583 flights
- Overnights72% on time · p90 65 min · 1,763 flights
- Afternoons70% on time · p90 60 min · 2,295 flights
- Evenings69% on time · p90 70 min · 3,090 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 80% on time.
- Wednesdays80% on time · p90 35 min · 2,039 flights
- Tuesdays78% on time · p90 45 min · 2,044 flights
- Saturdays76% on time · p90 45 min · 2,047 flights
- Sundays75% on time · p90 50 min · 2,105 flights
- Mondays75% on time · p90 50 min · 2,099 flights
- Thursdays74% on time · p90 50 min · 2,098 flights
- Fridays73% on time · p90 50 min · 2,110 flights
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