Historical on-time performance
Houston to Denver
Flights on IAH–DEN arrive on time 81% 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-time81%Medianon timep9035 minCancel0.3%Flights778
- United AirlinesOn-time81%Medianon timep9040 minCancel0.3%Flights3,854
Why flights run late
Delay causes
- Airline28%
- Weather7%
- Air traffic (NAS)27%
- Late aircraft37%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline29%
- Weather71%
- 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 IAH → DEN
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 — 87% on time.
- Mornings87% on time · p90 15 min · 4,733 flights
- Middays82% on time · p90 30 min · 3,063 flights
- Overnights73% on time · p90 55 min · 2,728 flights
- Afternoons69% on time · p90 70 min · 2,419 flights
- Evenings64% on time · p90 80 min · 1,585 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 80% on time.
- Tuesdays80% on time · p90 40 min · 2,038 flights
- Wednesdays80% on time · p90 35 min · 2,031 flights
- Saturdays78% on time · p90 45 min · 2,039 flights
- Mondays77% on time · p90 50 min · 2,098 flights
- Fridays77% on time · p90 45 min · 2,107 flights
- Thursdays77% on time · p90 45 min · 2,098 flights
- Sundays77% on time · p90 40 min · 2,117 flights
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