ON TIMEBOARD
GRR Grand Rapids / IAH Houston

GRR → IAH on time

Gerald R. Ford (Grand Rapids, MI) to Houston Bush Intercontinental (Houston, TX). Every scheduled flight, September 2025 to August 2026.

On time
79%
arrived < 15 min late
Cancelled
0.8%
366 flights
Typical arrival
−8 min
median vs schedule
When late
+74 min
average delay
Flights / day
1
1 airline

79% of flights from Grand Rapids to Houston arrived on time over the past 12 months. That is about the typical U.S. route. The 6 a.m. departures ran on time 79% of the time; the 5 p.m. ones 73%. 8% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for GRR → IAH: when a flight was late, it was under 45 minutes late 51% of the time. About 1 in 13 flights landed an hour or more late, and 1 in 61 three hours or more; 0.8% were cancelled outright.

Share of all 366 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
United Airlines36679%0.8%−8 min7.7%+74 minMesa Airlines 93%, SkyWest 6%, Republic Airways 1%, United Airlines 1%

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at GRR). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%6 a.m. departures: 79% on time (238 flights)796a7 a.m. departures: too few flights7a8 a.m. departures: too few flights (1 flights)8a9 a.m. departures: too few flights9a10 a.m. departures: too few flights10a11 a.m. departures: too few flights11anoon departures: too few flights (1 flights)12p1 p.m. departures: too few flights1p2 p.m. departures: too few flights2p3 p.m. departures: too few flights3p4 p.m. departures: too few flights (24 flights)4p5 p.m. departures: 73% on time (102 flights)735p
GRR → IAH, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By month

Each calendar month pooled over 2023–2026.

40%70%100%Jan: too few flights (93 flights)JanFeb: too few flights (85 flights)FebMar: too few flights (93 flights)MarApr: too few flights (90 flights)AprMay: too few flights (95 flights)MayJun: too few flights (90 flights)JunJul: too few flights (93 flights)JulAug: too few flights (93 flights)AugSep: too few flights (91 flights)SepOct: too few flights (93 flights)OctNov: too few flights (90 flights)NovDec: too few flights (93 flights)Dec

By day of week

DayFlightsOn timeCancelled
Monday53——
Tuesday52——
Wednesday52——
Thursday53——
Friday52——
Saturday52——
Sunday52——

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Air traffic & airport (NAS) 40%Airline (crew, maintenance, ops) 29%Late inbound plane 27%Severe weather 3%

Cancellations: weather 2 · air traffic/airport 1

Month by month

Not enough months with data to draw a trend.

Questions

How often are flights from GRR to IAH on time?

79% of 366 scheduled flights from Grand Rapids, MI to Houston, TX arrived within 15 minutes of schedule between September 2025 and August 2026. 0.8% were cancelled.

What is the best time of day to fly GRR to IAH?

Flights scheduled to leave at 6 a.m. were the most reliable (79% on time). The 5 p.m. departures were the least (73%).

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.