ON TIMEBOARD

IAH → JAX on time

Houston Bush Intercontinental (Houston, TX) to Jacksonville (Jacksonville, FL). Every scheduled flight, September 2025 to August 2026.

On time
80%
arrived < 15 min late
Cancelled
0.3%
1,279 flights
Typical arrival
−8 min
median vs schedule
When late
+56 min
average delay
Flights / day
4
1 airline

80% of flights from Houston to Jacksonville arrived on time over the past 12 months. That is about the typical U.S. route. The 7 a.m. departures ran on time 89% of the time; the 8 p.m. ones 69%. 6% 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 IAH → JAX: when a flight was late, it was under 45 minutes late 59% of the time. About 1 in 19 flights landed an hour or more late, and 1 in 98 three hours or more; 0.3% were cancelled outright.

Share of all 1,279 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
United Airlines1,27980%0.3%−8 min5.4%+56 minUnited Airlines 52%, Mesa Airlines 46%, SkyWest 2%

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 IAH). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%7 a.m. departures: 89% on time (343 flights)897a8 a.m. departures: too few flights (19 flights)8a9 a.m. departures: too few flights9a10 a.m. departures: too few flights10a11 a.m. departures: too few flights (8 flights)11anoon departures: 73% on time (251 flights)7312p1 p.m. departures: too few flights (79 flights)1p2 p.m. departures: 87% on time (118 flights)872p3 p.m. departures: too few flights3p4 p.m. departures: too few flights (52 flights)4p5 p.m. departures: too few flights (1 flights)5p6 p.m. departures: 82% on time (195 flights)826p7 p.m. departures: too few flights (62 flights)7p8 p.m. departures: 69% on time (151 flights)698p
IAH → JAX, 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

Last flight of the day

On IAH → JAX, each airline's last flight of the day was cancelled 0.0% of the time, against 0.4% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 1.1% of the time (earlier flights: 1.0%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.

AirlineLast departureLast: cancelledLast: 3h+ lateEarlier: cancelledNext morning
United Airlines8:00 p.m.0.0%1.1%0.4%first flight 7:35 a.m.

Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.

By month

Each calendar month pooled over 2023–2026. Best: November (88%). Worst: July (64%).

40%70%100%Jan: 78% on time (280 flights)78JanFeb: 83% on time (248 flights)83FebMar: 72% on time (277 flights)72MarApr: 78% on time (301 flights)78AprMay: 65% on time (332 flights)65MayJun: 66% on time (330 flights)66JunJul: 64% on time (337 flights)64JulAug: 78% on time (305 flights)78AugSep: 84% on time (273 flights)84SepOct: 82% on time (303 flights)82OctNov: 88% on time (293 flights)88NovDec: 79% on time (306 flights)79Dec

By day of week

DayFlightsOn timeCancelled
Monday18879%0.5%
Tuesday17783%0.0%
Wednesday18382%0.0%
Thursday18480%0.5%
Friday18585%0.0%
Saturday17780%0.0%
Sunday18572%1.1%

Why flights were late

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

Late inbound plane 41%Airline (crew, maintenance, ops) 32%Air traffic & airport (NAS) 20%Severe weather 7%

Cancellations: weather 3 · airline 1

Month by month

40%70%100%Sep 2023Jan 2024Jan 2025Jan 2026Apr 2024: 73% on time, 0.8% cancelledMay 2024: 52% on time, 6.4% cancelledMay 2025: 69% on time, 1.0% cancelledJun 2025: 61% on time, 2.5% cancelledJul 2025: 63% on time, 1.6% cancelledAug 2025: 75% on time, 0.9% cancelledOct 2025: 81% on time, 0.0% cancelledNov 2025: 85% on time, 0.0% cancelledDec 2025: 78% on time, 0.0% cancelledMay 2026: 73% on time, 0.0% cancelledJun 2026: 71% on time, 0.0% cancelledJul 2026: 75% on time, 0.0% cancelledAug 2026: 84% on time, 0.0% cancelled
Share of flights on time, by month (hover a point for cancellations)
IAH → JAX, monthly on-time and cancellation rate.

Flight numbers on this route

Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.

FlightDepartsFlightsOn timeCancelledTypical arrivalOperated by
UA 22938:00 p.m.26776%0.0%−5 minUnited Airlines

Worst days in the past year

DateFlightsOn timeCancelled
May 23, 202640%0
Jun 20, 202640%0
Jun 15, 202640%0
Mar 16, 202630%1
Dec 2, 2025425%0

Questions

How often are flights from IAH to JAX on time?

80% of 1,279 scheduled flights from Houston, TX to Jacksonville, FL arrived within 15 minutes of schedule between September 2025 and August 2026. 0.3% were cancelled.

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

Flights scheduled to leave at 7 a.m. were the most reliable (89% on time). The 8 p.m. departures were the least (69%).

What month has the most delays from IAH to JAX?

July (64% on time). The best month is November (88%), over 2023–2026.

Is the last flight of the day from IAH to JAX more likely to be cancelled?

No, the opposite. Each airline's last IAH–JAX flight of the day was cancelled 0.0% of the time over the past year, against 0.4% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.

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.