Historical on-time performance
Houston to Baltimore
1,235 miData through Dec 2025Source: US DOT · BTS
Flights on IAH–BWI arrive on time 74% of the time over the last 12 months.
On-time rate74%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 1,116 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.
- Spirit AirlinesOn-time77%Medianon timep9045 minCancel1.4%Flights423
- United AirlinesOn-time72%Medianon timep9060 minCancel0.6%Flights693
Why flights run late
Delay causes
- Airline35%
- Weather8%
- Air traffic (NAS)19%
- Late aircraft38%
- 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 IAH → BWI
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 62% to 84% on time.
- Mornings84% on time · p90 30 min · 1,031 flights
- Afternoons79% on time · p90 55 min · 77 flights · limited
- Middays79% on time · p90 45 min · 795 flights
- Evenings70% on time · p90 60 min · 1,376 flights
- Overnights62% on time · p90 55 min · 74 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 82% on time.
- Wednesdays82% on time · p90 35 min · 465 flights
- Tuesdays78% on time · p90 45 min · 465 flights
- Fridays75% on time · p90 55 min · 495 flights
- Thursdays75% on time · p90 55 min · 511 flights
- Saturdays74% on time · p90 60 min · 411 flights
- Sundays74% on time · p90 50 min · 488 flights
- Mondays74% on time · p90 45 min · 518 flights
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