ONT Ontario International Airport
live · 2h ago
Ontario CaliforniaOntario International Airport20:55·27°C·#84/327
OPSWATCH WEATHERVFR
+16 min

Ontario California (ONT) airport average departure delay right now

Departures +16 min, arrivals on schedule. No cancellations across 140 tracked flights.

Hour by hour
20:00today +16 min minor

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

Ontario California (ONT) delays today: 61% of the 82 flights we have timed operated within 15 minutes of schedule. Departures are running +16 min and arrivals on schedule, across 140 flights tracked so far today. No cancellations have been recorded. Source: official airport boards, METAR weather, Pro Flight Search tracking. Updated 18 October 2026 at 01:40 UTC.

Departures36 timed
On time47%17
Delayed53%19
typical now +16 min
Arrivals46 timed
On time70%32
Delayed30%14
typical now on schedule
On the boardDeparturesfull board ↗
21:36Y4 1863GDL on time
22:10AA 1706CLT on time

When this board posts +15, the median flight leaves +28. Posted vs. actual across every hub: the slippage study →

Arrivalsfull board ↗
20:45 21:22WN 1939LAS +37 min
20:58UA 2028DEN on time
21:05 21:12WN 1712DEN +7 min
21:11AA 2147DFW on time
21:25 21:27WN 3744MDW +2 min
21:29AS 271HNL on time
Running late right now1 of 13 still on the board · 7.7%
+37
WN 1939 from LAS · arr 21:22
Across our network, flights this late still cancel only 0.6% of the time.
In the air to ONTlive positions · 3-min feed
8aircraft inbound · next to land UA 2028 from DEN, lands ~20:56
UA 2028DEN
on final · ~20:56
B6 355JFK
on final · ~20:57
AA 2147DFW
lands ~21:05
WN 1712DEN
lands ~21:09

Positions as of 20:51 local · updates every 3 min. Tap any flight to watch it on its own page.

Delayed routes todaymedian · min 3 legs
LAS+28m
DFW+26m
SFO+20m
HNL+17m
Airlines by median delay todaymedian · min 3 legs
8CATI+43m
F9Frontier+16m
Why7 kt E winds, Broken at 20,000 ft. Operations are already late; the delay is not coming from weather.
Cancelled 0.0%0 of 140 A typical day here runs ~0.2%. Today is holding at or below normal. Weather window Forecast (TAF) 🌤 staying clear No significant weather in the TAF window. Made up in the air Network figure ~27 min Network-wide median for delayed flights in our tracked sample.
Last 30 days

Today is the 8th worst day of the last 30. Median day: +14 min departures.

Typical week here
+14
MON
+11
TUE
+12
WED
+17
THU
+15
FRI
+12
SAT
+13
SUN

Last 90 days: lightest on Tuesday (+11 min), heaviest on Thursday (+17 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 +16 min. Arrivals are on schedule. Cancellations: 0 of 140 tracked flights (0.0%). The calmest upcoming departure hour looks like 04:00 (+3 min 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 +16 min, arrivals on schedule. No cancellations across 140 tracked flights. 61% of the 82 flights we timed here today operated within 15 minutes of schedule.

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

Winds E-080 at 7kt, Vis 10sm, Temp 27°C, Dew 1°C, Alt 29.98 inHg, Scattered clouds at 15000ft, Broken layer at 20000ft, Broken layer at 25000ft. 27°C. wind 7 kt. visibility >10 km. flight rules VFR.

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

Over the last 90 days, Tuesday averaged the lightest departure delays (+11 min). Thursday ran heaviest (+17 min).

How often are flights delayed at ONT today?

We tracked 140 flights today: departures +16 min, arrivals on schedule. No cancellations are recorded in the tracked sample.

What is the TAF forecast for ONT?

The next TAF period (VFR) forecasts: Winds NNE-020 at 11kt, Vis greater than 6sm, Scattered clouds at 12000ft, Broken layer at 20000ft.

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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.
Wind80° 7 kt
Visibility>10 km
Ceiling20,000 ft
Temp / dew27 / 1 °C
Pressure1015 hPa
KONT 180253Z 08007KT 10SM SCT150 BKN200 BKN250 27/01 A2998 RMK AO2 SLP138 T02670011 53005
17:00 to 19:00VFRWinds NNE-020 at 11kt, Vis greater than 6sm, Scattered clouds at 12000ft, Broken layer at 20000ft
19:00 to 15:00VFRWinds Variable at 6kt, Vis greater than 6sm, Few clouds at 12000ft
15:00 to 21:00VFRWinds WSW-240 at 8kt, Vis greater than 6sm, Sky clear
21:00 to 23:00VFRWinds Variable at 4kt, Vis greater than 6sm, Sky clear
Dep index
0.9/5Arr index
0.4/5
METAR 19:53 local · 1h ago · delay window 18:40 local · How these are computed → methodology