Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.

DELTA · FLIGHT DL 2455 SCHEDULED · TYPICAL SCHEDULE

Friday, October 2

DL 2455 · STL → SLC

departs 2:30 PM CT · arrives 4:37 PM MT

Forecast issued Tue 10:00 PM ET · 66h before departure

Arrive at SLC more than 15 minutes late?

8% chance · ±1 pts −3 pts · 24h

HOW SURE WE ARE Moderate. The odds now blend history with early weather forecasts.

How late will it get to SLC?

On time or early
92%
15–30 min late
0%
30 min–1 hour late
4%
1–2 hours late
1%
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

↑ Later flights pick up delays from earlier in the day

↑ 2pm departures from STL are often late

↑ Cloud base down to 400 ft, 0.5 in of rain forecast at STL that day

↓ Mostly benign weather forecast at SLC

↓ STL usually runs smoothly

Weather at each end

STL (origin) Gusts17 kt Ceiling400 ft Visibility4 mi Precip0.48 in

SLC (destination) Gusts10 kt Ceilingnone (clear) 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 2455 · STL → SLC

Odds over time

How late will it get to SLC?