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.
WESTJET · FLIGHT WS 1543
SCHEDULED · TYPICAL SCHEDULE
Wednesday, October 28 Tomorrow
WS 1543 · IAH → YYC
departs 2:59 PM CT · arrives 6:19 PM MDT
Forecast issued Tue 8:00 PM ET · 20h before departure
Watch this flight
Other days
Today 18%
Wed 10/28
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?
22%
chance · ±3 pts
−5 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
22%
Leave 15+ late
20%
Arrive 1h+ late
4%
Cancelled
3%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.7d
2d
Now
12h
6h
Departs
Lands
Arrive at YYC more than 15 minutes late?
Calm-weather odds: 11% · changed −5 pts in 24h
−5 pts
22%
Yes 22%
No 78%
Leave IAH more than 15 minutes late?
Calm-weather odds: 13% · changed −2 pts in 24h
−2 pts
20%
Yes 20%
No 80%
Arrive at YYC more than an hour late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed −3 pts in 24h
−3 pts
3%
Yes 3%
No 97%
How late will it get to YYC?
On time or early
76%
15–30 min late
8%
30 min–1 hour late
10%
1–2 hours late
2%
Over 2 hours late
2%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 1,100 ft, visibility down to 2 mi forecast at YYC that day
↑
2pm departures from IAH are often late
↑
This route's recent record
↓
Wednesdays in October are usually quieter than average
↓
YYC usually runs smoothly
Weather at each end
IAH (origin)
Gusts 15 kt Ceiling 400 ft Visibility 6 mi Precip none
YYC (destination)
Gusts 18 kt Ceiling 1,100 ft Visibility 2 mi Precip 0.02 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.