Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 2891
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
DL 2891 · ATL → ONT
departs 5:05 PM ET · arrives 6:30 PM PT
Forecast issued Thu 3:00 AM ET · 62h before departure
Watch this flight
Other days
Today 30%
Fri 10/2 35%
Sat 10/3
Sun 10/4 26%
Mon 10/5 23%
Tue 10/6 17%
Wed 10/7 17%
Odds over time
Arrive at ONT more than 15 minutes late?
31%
chance · ±4 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
31%
Leave 15+ late
28%
Arrive 1h+ late
11%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
4.8d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 18% · changed – in 24h
–
31%
Yes 31%
No 69%
Leave ATL more than 15 minutes late?
Calm-weather odds: 17% · changed – in 24h
–
28%
Yes 28%
No 72%
Arrive at ONT more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
11%
Yes 11%
No 89%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to ONT?
On time or early
68%
15–30 min late
14%
30 min–1 hour late
6%
1–2 hours late
8%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
0.5 in of rain forecast at ATL that day
↑
This flight has been late 42% of the time recently
↑
5pm departures from ATL are often late
↓
DL's recent on-time record
↓
ATL usually runs smoothly
Weather at each end
ATL (origin)
Gusts 8 kt Ceiling 3,800 ft Visibility 4 mi Precip 0.40 in
ONT (destination)
Gusts 14 kt Ceiling none (clear) Visibility 10+ mi Precip none
How this resolves
Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.
Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.