ON TIMEBOARD
GRR Grand Rapids / SFB Sanford

GRR → SFB on time

Gerald R. Ford (Grand Rapids, MI) to Orlando Sanford (Sanford, FL). Every scheduled flight, September 2025 to August 2026.

On time
73%
arrived < 15 min late
Cancelled
0.8%
396 flights
Typical arrival
−5 min
median vs schedule
When late
+86 min
average delay
Flights / day
1
1 airline

73% of flights from Grand Rapids to Sanford arrived on time over the past 12 months. That is worse than the typical U.S. route. 11% 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 → SFB: when a flight was late, it was under 45 minutes late 44% of the time. About 1 in 10 flights landed an hour or more late, and 1 in 36 three hours or more; 0.8% were cancelled outright.

Share of all 396 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Allegiant Air39673%0.8%−5 min9.8%+86 minAllegiant Air

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%7 a.m. departures: too few flights (41 flights)7a8 a.m. departures: too few flights (41 flights)8a9 a.m. departures: too few flights (31 flights)9a10 a.m. departures: too few flights (22 flights)10a11 a.m. departures: too few flights (12 flights)11anoon departures: too few flights (1 flights)12p1 p.m. departures: too few flights (15 flights)1p2 p.m. departures: too few flights (64 flights)2p3 p.m. departures: too few flights (32 flights)3p4 p.m. departures: too few flights (63 flights)4p
GRR → SFB, 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. Best: April (86%). Worst: March (77%).

40%70%100%Jan: too few flights (98 flights)JanFeb: 80% on time (113 flights)80FebMar: 77% on time (146 flights)77MarApr: 86% on time (117 flights)86AprMay: too few flights (83 flights)MayJun: too few flights (92 flights)JunJul: too few flights (91 flights)JulAug: too few flights (67 flights)AugSep: too few flights (55 flights)SepOct: too few flights (92 flights)OctNov: too few flights (80 flights)NovDec: 78% on time (120 flights)78Dec

By day of week

DayFlightsOn timeCancelled
Monday60——
Tuesday36——
Wednesday49——
Thursday64——
Friday60——
Saturday61——
Sunday66——

Why flights were late

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

Airline (crew, maintenance, ops) 38%Late inbound plane 35%Air traffic & airport (NAS) 15%Severe weather 12%

Cancellations: airline 2 · weather 1

Month by month

Not enough months with data to draw a trend.

Worst days in the past year

DateFlightsOn timeCancelled
Apr 4, 202630%0
Jan 4, 2026333%0
Mar 21, 2026367%0
Dec 20, 2025367%0
Dec 28, 20253100%0

Nearby airport alternatives

Other ways to make the same trip, using airports within 60 miles of Grand Rapids or Sanford. GRR → MCO has been 4 points more reliable.

RouteFlightsOn timeCancelled
GRR → SFB (this route)39673%0.8%
GRR → MCO Gerald R. Ford to Orlando39277%0.8%

Questions

How often are flights from GRR to SFB on time?

73% of 396 scheduled flights from Grand Rapids, MI to Sanford, FL arrived within 15 minutes of schedule between September 2025 and August 2026. 0.8% were cancelled.

What month has the most delays from GRR to SFB?

March (77% on time). The best month is April (86%), over 2023–2026.

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.