Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 1655
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
DL 1655 · BOS → SFO
departs 5:05 PM ET · arrives 8:51 PM PT
Forecast issued Tue 6:00 PM ET · 47h before departure
Watch this flight
Other days
Today 41%
Wed 9/30 30%
Thu 10/1
Fri 10/2 32%
Sat 10/3 20%
Sun 10/4 31%
Mon 10/5 29%
Odds over time
Arrive at SFO more than 15 minutes late?
26%
chance · ±4 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
26%
Leave 15+ late
24%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.6d
Now
1d
12h
6h
Departs
Lands
Arrive at SFO more than 15 minutes late?
Calm-weather odds: 18% · changed – in 24h
–
26%
Yes 26%
No 74%
Leave BOS more than 15 minutes late?
Calm-weather odds: 21% · changed – in 24h
–
24%
Yes 24%
No 76%
Arrive at SFO more than an hour late?
Calm-weather odds: 6% · changed – in 24h
–
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to SFO?
On time or early
74%
15–30 min late
4%
30 min–1 hour late
15%
1–2 hours late
3%
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
↑
5pm departures from BOS are often late
↑
Arrivals into SFO at that hour are often late
↑
This flight has been late 30% of the time recently
↓
Cloud base down to 1,100 ft forecast at SFO that day
↓
Other factors
Weather at each end
BOS (origin)
Gusts 16 kt Ceiling 10,000 ft Visibility 2 mi Precip none
SFO (destination)
Gusts 11 kt Ceiling 1,100 ft Visibility 8 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.