Schedule: the flights that flew on Tuesday, Oct 20, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
WESTJET · FLIGHT WS 1500
SCHEDULED · TYPICAL SCHEDULE
Tuesday, October 27 Today
WS 1500 · YYC → SFO
departs 9:59 AM MDT · arrives 12:00 PM PT
Forecast issued Tue 2:00 AM ET · 10h before departure
Watch this flight
Other days
Today
Wed 10/28 48%
Thu 10/29 26%
Fri 10/30 31%
Sat 10/31 26%
Sun 11/1 41%
Mon 11/2 26%
Odds over time
Arrive at SFO more than 15 minutes late?
21%
chance · ±0 pts
−2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
21%
Leave 15+ late
18%
Arrive 1h+ late
5%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
6.5d
2d
1d
Now
6h
Departs
Lands
Arrive at SFO more than 15 minutes late?
Calm-weather odds: 16% · changed −2 pts in 24h
−2 pts
21%
Yes 21%
No 79%
Leave YYC more than 15 minutes late?
Calm-weather odds: 17% · changed +0 pts in 24h
+0 pts
18%
Yes 18%
No 82%
Arrive at SFO more than an hour late?
Calm-weather odds: 5% · changed −1 pt in 24h
−1 pt
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: 1% · changed +1 pt in 24h
+1 pt
2%
Yes 2%
No 98%
How late will it get to SFO?
On time or early
78%
15–30 min late
0%
30 min–1 hour late
15%
1–2 hours late
2%
Over 2 hours late
3%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Arrivals into SFO at that hour are often late
↑
Cloud base down to 1,100 ft, visibility down to 1.33333 mi forecast at YYC that day
↑
SFO is prone to delays
↓
Tuesdays in October are usually quieter than average
↓
Other factors
Weather at each end
YYC (origin)
Gusts 14 kt Ceiling 1,100 ft Visibility 1.33333 mi Precip 0.04 in
SFO (destination)
Gusts 22 kt Ceiling none (clear) Visibility 10+ mi Precip 0.01 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.