Ontario International in February 2024

83.3%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In February 2024, reporting carriers scheduled 1,731 domestic departures from Ontario International (ONT). 83.3% left less than 15 minutes late and 85.1% reached their destination on time; 0.7% were cancelled.

Nationally that month, 84.0% of flights departed on time and 83.4% arrived on time, so ONT departures were 0.7 points below the national departure figure.

Flights arriving at ONT that month were on time 82.8% of the time (1,734 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 38%, air carrier 32% and national aviation system 25%.

On time 85.1%
Arrived 15+ minutes late 14.2%
Cancelled 0.7%
Diverted 0.1%

Every scheduled departure from ONT in February 2024, judged by arrival at the destination.

February 2024 against a year earlier, the airport's year and the nation

Measure	Feb 2024	Year earlier	ONT, 12 months to Jul 2026	All reported flights, Feb 2024
Departed on time	83.3%	—	80.3%	84.0%
Arrived on time	85.1%	—	81.2%	83.4%
Cancelled	0.7%	—	0.9%	0.6%
Average departure delay (late minutes only)	13.1 min	—	13.7 min	11.2 min
Scheduled departures a day	58	—	71	17,307
Scheduled departures	1,731	—	25,854	519,221

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	800	46%	86.6%	-0.8 min	0.8%
AA American Airlines	254	15%	90.9%	-1.8 min	0.0%
F9 Frontier Airlines	183	11%	72.7%	15.3 min	0.5%
DL Delta Air Lines	174	10%	93.1%	-11.7 min	0.0%
OO SkyWest Airlines	115	7%	73.0%	9.4 min	3.5%
AS Alaska Airlines	89	5%	89.9%	-6.8 min	0.0%
UA United Airlines	58	3%	77.6%	23.1 min	0.0%
B6 JetBlue Airways	29	2%	86.2%	-5.7 min	3.4%
HA Hawaiian Airlines	29	2%	69.0%	8.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ONT–PHX	Ontario to Phoenix	242	88.0%	-1.7 min	0.0%
ONT–DEN	Ontario to Denver	219	80.8%	11.8 min	0.9%
ONT–LAS	Ontario to Las Vegas	185	78.9%	5.7 min	0.5%
ONT–DFW	Ontario to Dallas/Fort Worth	161	88.8%	-2.7 min	0.0%
ONT–SEA	Ontario to Seattle	133	92.5%	-12.0 min	0.0%
ONT–SMF	Ontario to Sacramento	121	89.3%	-1.4 min	0.8%
ONT–OAK	Ontario to Oakland	116	87.9%	-1.3 min	0.9%
ONT–SJC	Ontario to San Jose	99	86.9%	-2.0 min	1.0%
ONT–SFO	Ontario to San Francisco	98	57.1%	26.0 min	5.1%
ONT–SLC	Ontario to Salt Lake City	78	88.5%	-4.1 min	0.0%
ONT–ATL	Ontario to Atlanta	58	93.1%	-8.8 min	0.0%
ONT–AUS	Ontario to Austin	29	93.1%	-3.1 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), February 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Feb 2024	Minutes
Air carrier	32.2%	35.9%	6,389
Late-arriving aircraft	38.3%	36.9%	7,594
National Aviation System	25.1%	21.7%	4,980
Extreme weather	4.5%	5.3%	884
Security	0.0%	0.3%	0

19,847 delay minutes on 245 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left ONT on time in February 2024?

83.3% of 1,731 scheduled domestic departures left less than 15 minutes late, and 85.1% reached their destination on time. The national figures that month were 84.0% and 83.4%.

How does that compare with a year earlier?

February 2023 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for February 2024; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for ONT · methodology · corrections.