Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 1015
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
DL 1015 · IAD → SEA
departs 7:00 AM ET · arrives 9:45 AM PT
Forecast issued Fri 3:00 PM ET · 40h before departure
Watch this flight
Other days
Today 8%
Sat 10/3 10%
Sun 10/4
Mon 10/5 12%
Tue 10/6 10%
Wed 10/7 8%
Thu 10/8 10%
Odds over time
Arrive at SEA more than 15 minutes late?
8%
chance · ±0 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
8%
Leave 15+ late
8%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
5.4d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 6% · changed −1 pt in 24h
−1 pt
8%
Yes 8%
No 92%
Leave IAD more than 15 minutes late?
Calm-weather odds: 8% · changed +1 pt in 24h
+1 pt
8%
Yes 8%
No 92%
Arrive at SEA more than an hour late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
5%
Yes 5%
No 95%
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
91%
15–30 min late
2%
30 min–1 hour late
<1%
1–2 hours late
2%
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
↑
This flight has been late 21% of the time recently
↓
Early flights usually leave on time
↓
DL's recent on-time record
Weather at each end
IAD (origin)
Gusts 8 kt Ceiling 200 ft Visibility 1 mi Precip 0.36 in
SEA (destination)
Gusts 7 kt Ceiling 100 ft Visibility 9 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.