Historical on-time performance
Baltimore to Houston
1,235 miData through Dec 2025Source: US DOT · BTS
Flights on BWI–IAH arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 1,119 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-time81%Medianon timep9030 minCancel1.2%Flights694
- Spirit AirlinesOn-time79%Medianon timep9050 minCancel1.4%Flights425
Why flights run late
Delay causes
- Airline36%
- Weather10%
- Air traffic (NAS)31%
- Late aircraft23%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly BWI → IAH
All airlines · rolling 36 months (2023-01 .. 2025-12).
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 · 1,433 flights
- Middays79% on time · p90 35 min · 571 flights
- Afternoons74% on time · p90 50 min · 926 flights
- Overnights67% on time · p90 80 min · 151 flights · limited
- Evenings64% on time · p90 70 min · 277 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 83% on time.
- Wednesdays83% on time · p90 25 min · 462 flights
- Tuesdays82% on time · p90 30 min · 472 flights
- Saturdays80% on time · p90 35 min · 416 flights
- Sundays79% on time · p90 45 min · 481 flights
- Fridays79% on time · p90 35 min · 495 flights
- Thursdays78% on time · p90 45 min · 510 flights
- Mondays76% on time · p90 40 min · 522 flights
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