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2,142 km · Domestic

George Bush Intercontinental (IAH) – Ontario (ONT)

In July 2026, 123 flights operated between George Bush Intercontinental and Ontario (both directions), and 84.6% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January7882▲ 5.1%
February7772▼ 6.5%
March11678▼ 32.8%
April10778▼ 27.1%
May88122▲ 38.6%
June76117▲ 53.9%
July77123▲ 59.7%
August79––
September86––
October96–in progress
November94––
December88––
Year to date (Jan–Jul)619672▲ 8.6%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January76.9%89.0%▲ 15.7%
February84.4%88.9%▲ 5.3%
March76.7%76.9%▲ 0.3%
April81.3%84.6%▲ 4.1%
May73.9%82.8%▲ 12.0%
June57.9%68.4%▲ 18.1%
July63.6%84.6%▲ 33.0%
August68.4%––
September82.6%––
October83.3%–in progress
November74.5%––
December79.5%––
Year-to-date average (Jan–Jul)73.5%82.2%▲ 11.8%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January40▼ 100.0%
February10▼ 100.0%
March220.0%
April10▼ 100.0%
May10▼ 100.0%
June23▲ 50.0%
July01–
August1––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)116▼ 45.5%

Airlines on this route

  1. United Airlines 66.1%
  2. Frontier Airlines 33.9%

Oct 1, 2024 – Jul 31, 2026

By direction

IAH → ONT

Scheduled flights
997
Flights operated
989
Cancelled
8 · 0.8%
On-time departures
71.3%

ONT → IAH

Scheduled flights
995
Flights operated
983
Cancelled
12 · 1.2%
On-time departures
84.4%

IAH → ONT and ONT → IAH counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 1,317 66.1% 80.6% 9
Frontier Airlines F9 675 33.9% 72.4% 11

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay06:00–07:006.6min · 619 recorded · 614 measured
Gap to highest-delay hour11.5min06:00 ↔ 20:00
Recorded flights1,992IAH–ONT

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 84 recorded · 83 measured · Source: the US BTS 06:00 · 88.9% · 619 recorded · 614 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 6 recorded · 6 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 29 recorded · 29 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 27 recorded · 26 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 12 recorded · 12 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 19 recorded · 18 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 157 recorded · 154 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 47 recorded · 47 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 57 recorded · 56 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 34 recorded · 34 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 100 recorded · 99 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 88 recorded · 85 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 10 recorded · 10 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 124 recorded · 122 measured · Source: the US BTS 20:00 · 71.8% · 579 recorded · 577 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · Fewer than 200 measured departures · 84 recorded · 83 measured · Source: the US BTS 06:00 · 6.6 min · 619 recorded · 614 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 6 recorded · 6 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 29 recorded · 29 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 27 recorded · 26 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 12 recorded · 12 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 19 recorded · 18 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 157 recorded · 154 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 47 recorded · 47 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 57 recorded · 56 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 34 recorded · 34 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 100 recorded · 99 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 88 recorded · 85 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 10 recorded · 10 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 124 recorded · 122 measured · Source: the US BTS 20:00 · 18.1 min · 579 recorded · 577 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · 84 · 84 recorded · 83 measured · Source: the US BTS 06:00 · 619 · 619 recorded · 614 measured · Source: the US BTS 07:00 · 6 · 6 recorded · 6 measured · Source: the US BTS 08:00 · 29 · 29 recorded · 29 measured · Source: the US BTS 09:00 · 27 · 27 recorded · 26 measured · Source: the US BTS 10:00 · 12 · 12 recorded · 12 measured · Source: the US BTS 11:00 · 19 · 19 recorded · 18 measured · Source: the US BTS 12:00 · 157 · 157 recorded · 154 measured · Source: the US BTS 13:00 · 47 · 47 recorded · 47 measured · Source: the US BTS 14:00 · 57 · 57 recorded · 56 measured · Source: the US BTS 15:00 · 34 · 34 recorded · 34 measured · Source: the US BTS 16:00 · 100 · 100 recorded · 99 measured · Source: the US BTS 17:00 · 88 · 88 recorded · 85 measured · Source: the US BTS 18:00 · 10 · 10 recorded · 10 measured · Source: the US BTS 19:00 · 124 · 124 recorded · 122 measured · Source: the US BTS 20:00 · 579 · 579 recorded · 577 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00Fewer than 200 measured departures—8384
06:0088.9%6.6 min614619
07:00Fewer than 200 measured departures—66
08:00Fewer than 200 measured departures—2929
09:00Fewer than 200 measured departures—2627
10:00Fewer than 200 measured departures—1212
11:00Fewer than 200 measured departures—1819
12:00Fewer than 200 measured departures—154157
13:00Fewer than 200 measured departures—4747
14:00Fewer than 200 measured departures—5657
15:00Fewer than 200 measured departures—3434
16:00Fewer than 200 measured departures—99100
17:00Fewer than 200 measured departures—8588
18:00Fewer than 200 measured departures—1010
19:00Fewer than 200 measured departures—122124
20:0071.8%18.1 min577579
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 71.8% · 362 recorded · 358 measured · Source: the US BTS Tuesday · 84.1% · 228 recorded · 226 measured · Source: the US BTS Wednesday · 78.3% · 251 recorded · 249 measured · Source: the US BTS Thursday · 79.6% · 266 recorded · 265 measured · Source: the US BTS Friday · 77.6% · 371 recorded · 366 measured · Source: the US BTS Saturday · 77.2% · 230 recorded · 228 measured · Source: the US BTS Sunday · 79.3% · 284 recorded · 280 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 21.3 min · 362 recorded · 358 measured · Source: the US BTS Tuesday · 11.6 min · 228 recorded · 226 measured · Source: the US BTS Wednesday · 11.3 min · 251 recorded · 249 measured · Source: the US BTS Thursday · 13.5 min · 266 recorded · 265 measured · Source: the US BTS Friday · 15.1 min · 371 recorded · 366 measured · Source: the US BTS Saturday · 9.6 min · 230 recorded · 228 measured · Source: the US BTS Sunday · 13.7 min · 284 recorded · 280 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 362 · 362 recorded · 358 measured · Source: the US BTS Tuesday · 228 · 228 recorded · 226 measured · Source: the US BTS Wednesday · 251 · 251 recorded · 249 measured · Source: the US BTS Thursday · 266 · 266 recorded · 265 measured · Source: the US BTS Friday · 371 · 371 recorded · 366 measured · Source: the US BTS Saturday · 230 · 230 recorded · 228 measured · Source: the US BTS Sunday · 284 · 284 recorded · 280 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday71.8%21.3 min358362
Tuesday84.1%11.6 min226228
Wednesday78.3%11.3 min249251
Thursday79.6%13.5 min265266
Friday77.6%15.1 min366371
Saturday77.2%9.6 min228230
Sunday79.3%13.7 min280284

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · Fewer than 200 measured departures · 164 recorded · 160 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 150 recorded · 149 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 198 recorded · 194 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 186 recorded · 185 measured · Source: the US BTS May · 79.1% · 211 recorded · 210 measured · Source: the US BTS Jun · Fewer than 200 measured departures · 198 recorded · 193 measured · Source: the US BTS Jul · 76.5% · 201 recorded · 200 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 80 recorded · 79 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 86 recorded · 86 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 158 recorded · 158 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 172 recorded · 170 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · Fewer than 200 measured departures · 164 recorded · 160 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 150 recorded · 149 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 198 recorded · 194 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 186 recorded · 185 measured · Source: the US BTS May · 15.3 min · 211 recorded · 210 measured · Source: the US BTS Jun · Fewer than 200 measured departures · 198 recorded · 193 measured · Source: the US BTS Jul · 13.7 min · 201 recorded · 200 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 80 recorded · 79 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 86 recorded · 86 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 158 recorded · 158 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 172 recorded · 170 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 164 · 164 recorded · 160 measured · Source: the US BTS Feb · 150 · 150 recorded · 149 measured · Source: the US BTS Mar · 198 · 198 recorded · 194 measured · Source: the US BTS Apr · 186 · 186 recorded · 185 measured · Source: the US BTS May · 211 · 211 recorded · 210 measured · Source: the US BTS Jun · 198 · 198 recorded · 193 measured · Source: the US BTS Jul · 201 · 201 recorded · 200 measured · Source: the US BTS Aug · 80 · 80 recorded · 79 measured · Source: the US BTS Sep · 86 · 86 recorded · 86 measured · Source: the US BTS Oct · 158 · 158 recorded · 158 measured · Source: the US BTS Nov · 188 · 188 recorded · 188 measured · Source: the US BTS Dec · 172 · 172 recorded · 170 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—160164
FebFewer than 200 measured departures—149150
MarFewer than 200 measured departures—194198
AprFewer than 200 measured departures—185186
May79.1%15.3 min210211
JunFewer than 200 measured departures—193198
Jul76.5%13.7 min200201
AugFewer than 200 measured departures—7980
SepFewer than 200 measured departures—8686
OctFewer than 200 measured departures—158158
NovFewer than 200 measured departures—188188
DecFewer than 200 measured departures—170172

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 77.1% 1,535
  • Delayed >15 min 21.9% 437
  • Cancelled 1.0% 20
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

10
10 of 10
Flight numbersBy direction DeparturesOn time
UA1563 IAH → ONT 548 69.7%
UA1936 ONT → IAH 365 91.2%
F993131 IAH → ONT 338 70.3%
F993132 ONT → IAH 278 74.0%
UA722 ONT → IAH 205 90.1%
F992412 ONT → IAH 58 77.2%
UA2360 ONT → IAH 37 88.9%
UA2405 IAH → ONT 37 83.8%
UA397 ONT → IAH 36 72.2%
UA1358 IAH → ONT 32 87.5%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 123 +59.7% 1 84.6%
June 2026 117 +53.9% 3 68.4%
May 2026 122 +38.6% 0 82.8%
April 2026 78 −27.1% 0 84.6%
March 2026 78 −32.8% 2 76.9%
February 2026 72 −6.5% 0 88.9%
January 2026 82 +5.1% 0 89.0%
December 2025 88 +7.3% 0 79.5%
November 2025 94 +0.0% 0 74.5%
October 2025 96 +54.8% 0 83.3%
September 2025 86 0 82.6%
August 2025 79 1 68.4%
July 2025 77 0 63.6%
June 2025 76 2 57.9%
May 2025 88 1 73.9%
April 2025 107 1 81.3%
March 2025 116 2 76.7%
February 2025 77 1 84.4%
January 2025 78 4 76.9%
December 2024 82 2 78.0%
November 2024 94 0 80.9%
October 2024 62 0 69.4%

How to read this chart

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