ONT Ontario International Airport
live · 8h ago
Ontario CaliforniaOntario International Airport06:15·24°C·#262/327
OPSWATCH WEATHERVFR
+13 min

Ontario California (ONT) airport average departure delay right now

Measured operations: departures +13 min, arrivals 4 min early. This airport's board does not publish cancellations.

Hour by hour
06:00today +13 min on time

Drag. Solid bars are observed. Hatched bars are expected.

Ontario California (ONT) delays today: departures are running +13 min and arrivals 4 min early, across 68 flights tracked so far. Source: official airport boards, METAR weather, Pro Flight Search tracking. Updated 6 September 2026 at 05:18 UTC.

Departures19 timed
On time79%15
Delayed21%4
typical now +13 min
Arrivals42 timed
On time83%35
Delayed17%7
typical now 4 min early
Airlines by median delay todaymedian · min 3 legs
8CATI+36m
Why0 kt N winds, Broken at 6,000 ft at ONT right now (METAR).
Weather window Forecast (TAF) ⛈️ TAF hazard window The terminal forecast flags significant weather in the next few hours even though current rules are VFR. Made up in the air Network figure ~29 min Network-wide median for delayed flights in our tracked sample.
Last 30 days

Today is the 14th worst day of the last 30. Median day: +13 min departures.

Typical week here
+15
MON
+13
TUE
+14
WED
+16
THU
+14
FRI
+13
SAT
+13
SUN

Last 90 days: lightest on Saturday (+13 min), heaviest on Thursday (+16 min).

Watch this airportfree · no account

One message when ONT crosses your line, one when it clears. Nothing else, ever.

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Sample · what you getONT went yellow · departures now +34 min and building · 19:40 local. Weather clears after 03:00. → proflightsearch.com/airport-delays/ontario-ONT

Ontario California airport delays today

Weather watch at ONT: measured operations remain calm. A typical departure is currently +13 min. Arrivals are 4 min early. The calmest upcoming departure hour looks like 11:00 (+10 min expected). The terminal forecast includes fog/mist.

Other Los Angeles airports: LAX BUR SNA LGB · Nearby gateways: SNA LGB BUR LAX PSP SAN · Global delay board · Nonstop routes from Ontario California

Is Ontario California (ONT) delayed right now?

Weather watch at ONT: measured operations remain calm. The terminal forecast includes fog/mist. Measured operations: departures +13 min, arrivals 4 min early. This airport's board does not publish cancellations.

What is the current weather at Ontario California (ONT)?

Winds Calm, Vis 10sm, Temp 24°C, Dew 8°C, Alt 29.92 inHg, Broken layer at 6000ft, Broken layer at 11000ft. 24°C. wind 0 kt. visibility >10 km. flight rules VFR.

What is the best day to fly from Ontario California (ONT)?

Over the last 90 days, Saturday averaged the lightest departure delays (+13 min). Thursday ran heaviest (+16 min).

How often are flights delayed at ONT today?

We tracked 68 flights today: departures +13 min, arrivals 4 min early.

What is the TAF forecast for ONT?

The next TAF period (VFR) forecasts: Winds Variable at 3kt, Vis greater than 6sm, Vicinity Showers, Scattered clouds at 8000ft, Broken layer at 20000ft.

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Pro Flight Search: Ontario California (ONT) live delay and board tracking, measured from official airport boards.

Canonical URL
https://proflightsearch.com/airport-delays/ontario-ONT
How we measure this →
Technical · METAR, flight rules & indexes
VFRRight now visual (VFR). Weather isn’t the binding constraint right now, and the forecast (TAF) below stays visual.
Wind0° 0 kt
Visibility>10 km
Ceiling6,000 ft
Temp / dew24 / 8 °C
Pressure1013 hPa
KONT 061253Z 00000KT 10SM BKN060 BKN110 24/08 A2992 RMK AO2 SLP113 T02440083 $
05:00 to 11:00VFRWinds Variable at 3kt, Vis greater than 6sm, Vicinity Showers, Scattered clouds at 8000ft, Broken layer at 20000ft
11:00 to 15:00VFRWinds Variable at 5kt, Vis 6sm, Light Showers Rain, Mist, Broken layer at 5000ft, Broken layer at 10000ft
15:00 to 22:00VFRWinds WSW-250 at 10kt, Vis greater than 6sm, Vicinity Showers, Scattered clouds at 8000ft, Broken layer at 10000ft
22:00 to 11:00VFRWinds Variable at 4kt, Vis greater than 6sm, Scattered clouds at 10000ft
Dep index
0.9/5Arr index
0.0/5
METAR 05:53 local · 22m ago · delay window 22:18 local · How these are computed → methodology