Schedule: the flights that flew on Wednesday, Oct 7, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
WESTJET · FLIGHT WS 1503
SCHEDULED · TYPICAL SCHEDULE
Wednesday, October 14
WS 1503 · SFO → YYC
departs 1:14 PM PT · arrives 4:59 PM MDT
Forecast issued Mon 3:00 AM ET · 61h before departure
Watch this flight
Other days
Today 22%
Tue 10/13 13%
Wed 10/14
Thu 10/15 22%
Fri 10/16 25%
Sat 10/17 18%
Sun 10/18 19%
Odds over time
Arrive at YYC more than 15 minutes late?
13%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
13%
Leave 15+ late
11%
Arrive 1h+ late
4%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.7d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at YYC more than 15 minutes late?
Calm-weather odds: 11% · changed – in 24h
–
13%
Yes 13%
No 87%
Leave SFO more than 15 minutes late?
Calm-weather odds: 10% · changed – in 24h
–
11%
Yes 11%
No 89%
Arrive at YYC more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: 1% · changed – in 24h
–
1%
Yes 1%
No 99%
How late will it get to YYC?
On time or early
86%
15–30 min late
5%
30 min–1 hour late
4%
1–2 hours late
2%
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
↑
1pm departures from SFO are often late
↑
This route's recent record
↑
SFO is busy at that time
↓
Mostly benign weather forecast at SFO
↓
Wednesdays in October are usually quieter than average
Weather at each end
SFO (origin)
Gusts 12 kt Ceiling none (clear) Visibility 10+ mi Precip none
YYC (destination)
Gusts 16 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.