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 1543
SCHEDULED · TYPICAL SCHEDULE
Tuesday, October 27 Today
WS 1543 · IAH → YYC
departs 2:57 PM CT · arrives 6:11 PM MDT
Forecast issued Tue 7:00 PM ET · 3h after departure
Watch this flight
Other days
Today
Wed 10/28 20%
Thu 10/29 16%
Fri 10/30 26%
Sat 10/31 16%
Sun 11/1 18%
Mon 11/2 18%
Odds over time
Arrive at YYC more than 15 minutes late?
18%
chance · ±1 pts
+3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
18%
Leave 15+ late
20%
Arrive 1h+ late
5%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.7d
2d
1d
12h
6h
Departs
Lands
Arrive at YYC more than 15 minutes late?
Calm-weather odds: 15% · changed +3 pts in 24h
+3 pts
18%
Yes 18%
No 82%
Leave IAH more than 15 minutes late?
Calm-weather odds: 19% · changed +6 pts in 24h
+6 pts
20%
Yes 20%
No 80%
Arrive at YYC more than an hour late?
Calm-weather odds: 5% · changed +2 pts in 24h
+2 pts
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to YYC?
On time or early
80%
15–30 min late
8%
30 min–1 hour late
5%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
0.8 in of rain forecast at IAH that day
↑
2pm departures from IAH are often late
↑
Visibility down to 2 mi forecast at YYC that day
↓
Tuesdays in October are usually quieter than average
↓
YYC usually runs smoothly
Weather at each end
IAH (origin)
Gusts 7 kt Ceiling 2,700 ft Visibility 3 mi Precip 0.32 in
YYC (destination)
Gusts 15 kt Ceiling 1,167 ft Visibility 2 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.