Schedule: a typical summer Tuesday (the flights of Jul 28, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

DELTA · FLIGHT DL 939 SCHEDULED · TYPICAL SCHEDULE

Tuesday, September 29

DL 939 · LAX → JFK

departs 11:15 AM PT · arrives 8:02 PM ET

Forecast issued Tue 10:00 PM ET · 8h after departure

Arrive at JFK more than 15 minutes late?

23% chance · ±0 pts +3 pts · 24h

HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.

How late will it get to JFK?

On time or early
76%
15–30 min late
11%
30 min–1 hour late
6%
1–2 hours late
4%
Over 2 hours late
2%
Cancelled
<1%

Gate arrival compared with the scheduled arrival. The ranges add up to 100%.

What’s moving the odds

↑ Arrivals into JFK at that hour are often late

↑ 11am departures from LAX are often late

↑ JFK is prone to delays

↓ Tuesdays in September are usually quieter than average

↓ Mostly benign weather forecast at LAX

Weather at each end

LAX (origin) Gusts24 kt Ceilingnone (clear) Visibility10+ mi Precipnone

JFK (destination) Gusts10 kt Ceiling1,800 ft Visibility10+ mi Precipnone

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.

DL 939 · LAX → JFK

Odds over time

How late will it get to JFK?