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.
PORTER · FLIGHT PD 671
SCHEDULED · TYPICAL SCHEDULE
Wednesday, October 28 Tomorrow
PD 671 · YYZ → SFO
departs 9:46 AM EDT · arrives 12:21 PM PT
Forecast issued Tue 1:00 AM ET · 33h before departure
Watch this flight
Other days
Today 22%
Wed 10/28
Thu 10/29 21%
Fri 10/30 30%
Sat 10/31 26%
Sun 11/1 37%
Mon 11/2 31%
Odds over time
Arrive at SFO more than 15 minutes late?
16%
chance · ±3 pts
+1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
20%
Arrive 1h+ late
5%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.4d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SFO more than 15 minutes late?
Calm-weather odds: 16% · changed +1 pt in 24h
+1 pt
16%
Yes 16%
No 84%
Leave YYZ more than 15 minutes late?
Calm-weather odds: 20% · changed +0 pts in 24h
+0 pts
20%
Yes 20%
No 80%
Arrive at SFO more than an hour late?
Calm-weather odds: 5% · 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 SFO?
On time or early
83%
15–30 min late
7%
30 min–1 hour late
4%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
SFO is prone to delays
↑
Arrivals into SFO at that hour are often late
↑
This route's recent record
↓
Mostly benign weather forecast at SFO
↓
Mostly benign weather forecast at YYZ
Weather at each end
YYZ (origin)
Gusts 7 kt Ceiling 7,000 ft Visibility 10+ mi Precip none
SFO (destination)
Gusts 13 kt Ceiling none (clear) Visibility 10+ 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.