Ontario International in February 2026

84.5%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 2026, reporting carriers scheduled 1,734 domestic departures from Ontario International (ONT). 84.5% left less than 15 minutes late and 87.4% reached their destination on time; 0.3% were cancelled.

Nationally that month, 78.1% of flights departed on time and 78.3% arrived on time, so ONT departures were 6.4 points above the national departure figure.

A year earlier, in February 2025, the airport had 1,774 departures with 87.4% leaving on time: a change of −2.9 points, with flights down 2%.

Flights arriving at ONT that month were on time 82.9% of the time (1,733 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 40% and national aviation system 17%.

On time 87.4%
Arrived 15+ minutes late 12.1%
Cancelled 0.3%
Diverted 0.1%

Every scheduled departure from ONT in February 2026, judged by arrival at the destination.

February 2026 against a year earlier, the airport's year and the nation

Measure	Feb 2026	Feb 2025	ONT, 12 months to Jul 2026	All reported flights, Feb 2026
Departed on time	84.5%	87.4%	80.3%	78.1%
Arrived on time	87.4%	87.9%	81.2%	78.3%
Cancelled	0.3%	0.8%	0.9%	2.3%
Average departure delay (late minutes only)	10.9 min	7.9 min	13.7 min	15.0 min
Scheduled departures a day	58	59	71	17,168
Scheduled departures	1,734	1,774	25,854	515,037

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	829	48%	86.6%	-0.8 min	0.4%
AA American Airlines	273	16%	86.8%	0.2 min	0.7%
UA United Airlines	156	9%	82.7%	0.8 min	0.0%
AS Alaska Airlines	154	9%	92.9%	-9.8 min	0.0%
DL Delta Air Lines	134	8%	89.6%	0.4 min	0.0%
F9 Frontier Airlines	126	7%	87.3%	-3.4 min	0.8%
OO SkyWest Airlines	62	4%	95.2%	-16.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ONT–PHX	Ontario to Phoenix	240	87.5%	4.7 min	0.0%
ONT–LAS	Ontario to Las Vegas	192	88.0%	-1.8 min	0.5%
ONT–DEN	Ontario to Denver	171	85.4%	-0.6 min	1.2%
ONT–DFW	Ontario to Dallas/Fort Worth	152	84.9%	-5.8 min	1.3%
ONT–SMF	Ontario to Sacramento	152	85.5%	-0.9 min	0.0%
ONT–SEA	Ontario to Seattle	135	95.6%	-11.5 min	0.0%
ONT–OAK	Ontario to Oakland	115	89.6%	-6.6 min	0.9%
ONT–SJC	Ontario to San Jose	99	90.9%	-4.5 min	0.0%
ONT–SLC	Ontario to Salt Lake City	89	88.8%	5.8 min	0.0%
ONT–SFO	Ontario to San Francisco	79	72.2%	8.4 min	0.0%
ONT–ATL	Ontario to Atlanta	56	92.9%	-10.7 min	0.0%
ONT–PDX	Ontario to Portland	47	95.7%	-17.4 min	0.0%

By scheduled departure hour

100

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

Share of departures that left less than 15 minutes late, by scheduled hour (local time), February 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Feb 2026	Minutes
Air carrier	39.8%	38.2%	5,888
Late-arriving aircraft	42.3%	37.2%	6,255
National Aviation System	17.0%	18.5%	2,509
Extreme weather	0.2%	6.0%	24
Security	0.7%	0.2%	110

14,786 delay minutes on 210 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 2026?

84.5% of 1,734 scheduled domestic departures left less than 15 minutes late, and 87.4% reached their destination on time. The national figures that month were 78.1% and 78.3%.

How does that compare with a year earlier?

In February 2025, 87.4% of 1,774 departures left on time and 0.8% were cancelled, against 84.5% and 0.3% in February 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for February 2026; 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.