Schedule: the flights that flew on Wednesday, Oct 21, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 2921
SCHEDULED · TYPICAL SCHEDULE
Wednesday, October 28 Tomorrow
DL 2921 · SLC → SEA
departs 1:20 PM MT · arrives 2:35 PM PT
Forecast issued Tue 4:00 AM ET · 35h before departure
Watch this flight
Other days
Today 41%
Wed 10/28
Thu 10/29 22%
Fri 10/30 26%
Sat 10/31 20%
Sun 11/1 29%
Mon 11/2 29%
Odds over time
Arrive at SEA more than 15 minutes late?
17%
chance · ±1 pts
−2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
17%
Leave 15+ late
13%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.6d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 12% · changed −2 pts in 24h
−2 pts
17%
Yes 17%
No 83%
Leave SLC more than 15 minutes late?
Calm-weather odds: 10% · changed +1 pt in 24h
+1 pt
13%
Yes 13%
No 87%
Arrive at SEA more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SEA?
On time or early
82%
15–30 min late
9%
30 min–1 hour late
5%
1–2 hours late
2%
Over 2 hours late
<1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Arrivals into SEA at that hour are often late
↑
Mostly benign weather forecast at SEA
↑
SEA is prone to delays
↓
Wednesdays in October are usually quieter than average
↓
DL's recent on-time record
Weather at each end
SLC (origin)
Gusts 10 kt
Ceiling none (clear)
Visibility 10+ mi
Precip none
SEA (destination)
Gusts 19 kt
Ceiling 1,500 ft
Visibility 6 mi
Precip 0.07 in
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.