ONT Ontario International Airport
live · 3h ago
Ontario CaliforniaOntario International Airport01:11·20°C·#106/327
OPSWATCH WEATHERVFR
+19 min

Ontario California (ONT) airport average departure delay right now

Departures +19 min, arrivals +4 min. This airport's board does not publish cancellations.

Hour by hour
01:00today +19 min minor

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

Ontario California (ONT) delays today: 63% of the 96 flights we have timed operated within 15 minutes of schedule. Departures are running +19 min and arrivals +4 min, across 101 flights tracked so far today. Source: official airport boards, METAR weather, Pro Flight Search tracking. Updated 5 September 2026 at 05:18 UTC.

Departures33 timed
On time42%14
Delayed58%19
typical now +19 min
Arrivals63 timed
On time71%45
Delayed29%18
typical now +4 min
On the boardfull board ↗
01:46AS 2618CVG on time

When this board posts +15, the median flight leaves +24. Posted vs. actual across every hub: the slippage study →

In the air to ONTlive positions · 3-min feed
1aircraft inbound · next to land AS 2618 from CVG, lands ~02:30
AS 2618CVG
lands ~02:30

Positions as of 01:03 local · updates every 3 min. Tap any flight to watch it on its own page.

Delayed routes todaymedian · min 3 legs
OAK+38m
SMF+30m
DEN+26m
SLC+25m
Airlines by median delay todaymedian · min 3 legs
UAUnited+22m
AAAmerican+17m
Why3 kt SW winds. Operations are already late; the delay is not coming from weather.
Weather window Forecast (TAF) 🌤 staying clear No significant weather in the TAF window. 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 3rd worst day of the last 30. Median day: +13 min departures.

Typical week here
+15
MON
+13
TUE
+14
WED
+16
THU
+14
FRI
+12
SAT
+13
SUN

Last 90 days: lightest on Saturday (+12 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.

Tell me when delays go

From forecast@proflightsearch.com · one-tap unwatch in every message.

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

Delays are building at ONT. A typical departure is currently +19 min. Arrivals are +4 min. The calmest upcoming departure hour looks like 04:00 (on time expected).

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?

Delays are building at ONT. Departures +19 min, arrivals +4 min. This airport's board does not publish cancellations. 63% of the 96 flights we timed here today operated within 15 minutes of schedule.

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

Winds SW-230 at 3kt, Vis 10sm, Temp 20°C, Dew 14°C, Alt 29.95 inHg, Sky clear. 20°C. wind 3 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 (+12 min). Thursday ran heaviest (+16 min).

How often are flights delayed at ONT today?

We tracked 101 flights today: departures +19 min, arrivals +4 min.

What is the TAF forecast for ONT?

The next TAF period (VFR) forecasts: Winds Variable at 4kt, Vis greater than 6sm, Sky clear.

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Suggested citation

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.
Wind230° 3 kt
Visibility>10 km
Temp / dew20 / 14 °C
Pressure1014 hPa
KONT 050753Z 23003KT 10SM CLR 20/14 A2995 RMK AO2 SLP127 T02000144 403110172 $
23:00 to 14:00VFRWinds Variable at 4kt, Vis greater than 6sm, Sky clear
14:00 to 22:00VFRWinds WSW-250 at 11kt gusting to 18kt, Vis greater than 6sm, Scattered clouds at 10000ft
22:00 to 05:00VFRWinds Variable at 4kt, Vis greater than 6sm, Vicinity Showers, Broken layer at 10000ft
Dep index
0.9/5Arr index
0.1/5
METAR 00:53 local · 18m ago · delay window 22:18 local · How these are computed → methodology