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 820 SCHEDULED · TYPICAL SCHEDULE

Friday, October 2 Tomorrow

DL 820 · DCA → SLC

departs 5:45 PM ET · arrives 8:41 PM MT

Forecast issued Thu 6:00 PM ET · 24h before departure

Arrive at SLC more than 15 minutes late?

37% chance · ±1 pts +11 pts · 24h

HOW SURE WE ARE Good. The odds now lean mostly on firmed-up weather forecasts.

How late will it get to SLC?

On time or early
63%
15–30 min late
10%
30 min–1 hour late
12%
1–2 hours late
9%
Over 2 hours late
5%
Cancelled
<1%

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

What’s moving the odds

↑ 5pm departures from DCA are often late

↑ Mostly benign weather forecast at DCA

↑ Later flights pick up delays from earlier in the day

↓ Mostly benign weather forecast at SLC

↓ Fridays in October are usually quieter than average

Weather at each end

DCA (origin) Gusts12 kt Ceiling1,500 ft Visibility10+ mi Precip0.04 in

SLC (destination) Gusts13 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 820 · DCA → SLC

Odds over time

How late will it get to SLC?