Schedule: a typical summer Thursday (the flights of Jul 30, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 2635
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Yesterday
DL 2635 · SEA → SFO
departs 9:39 PM PT · arrives 11:59 PM PT
Forecast issued Thu 10:00 PM ET · 3h before departure
Watch this flight
Other days
Thu 10/1
Today 13%
Sat 10/3 11%
Sun 10/4 16%
Mon 10/5 17%
Tue 10/6 12%
Wed 10/7 14%
Odds over time
Arrive at SFO more than 15 minutes late?
55%
chance · ±0 pts
+36 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
55%
Leave 15+ late
71%
Arrive 1h+ late
49%
Cancelled
2%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at SFO more than 15 minutes late?
Calm-weather odds: 22% · changed +36 pts in 24h
+36 pts
55%
Yes 55%
No 45%
Leave SEA more than 15 minutes late?
Calm-weather odds: 26% · changed +43 pts in 24h
+43 pts
71%
Yes 71%
No 29%
Arrive at SFO more than an hour late?
Calm-weather odds: 9% · changed +40 pts in 24h
+40 pts
49%
Yes 49%
No 51%
Cancelled?
Calm-weather odds: <1% · changed +2 pts in 24h
+2 pts
2%
Yes 2%
No 98%
How late will it get to SFO?
On time or early
44%
15–30 min late
33%
30 min–1 hour late
0%
1–2 hours late
16%
Over 2 hours late
4%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
This flight has been late 28% of the time recently
↑
Arrivals into SFO at that hour are often late
↑
Later flights pick up delays from earlier in the day
↓
Mostly benign weather forecast at SEA
↓
Cloud base down to 500 ft forecast at SFO that day
Weather at each end
SEA (origin)
Gusts 9 kt Ceiling 5,500 ft Visibility 10+ mi Precip none
SFO (destination)
Gusts 24 kt Ceiling 500 ft Visibility 6 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.