Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 1731
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
DL 1731 · DEN → SEA
departs 6:30 AM MT · arrives 8:26 AM PT
Forecast issued Sun 4:00 AM ET · 28h before departure
Watch this flight
Other days
Today 20%
Mon 10/5
Tue 10/6 6%
Wed 10/7 6%
Thu 10/8 7%
Fri 10/9 6%
Sat 10/10 7%
Odds over time
Arrive at SEA more than 15 minutes late?
9%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
9%
Leave 15+ late
6%
Arrive 1h+ late
2%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
6.4d
2d
Now
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 6% · changed +2 pts in 24h
+2 pts
9%
Yes 9%
No 91%
Leave DEN more than 15 minutes late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
6%
Yes 6%
No 94%
Arrive at SEA more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SEA?
On time or early
90%
15–30 min late
5%
30 min–1 hour late
2%
1–2 hours late
<1%
Over 2 hours late
1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
SEA is prone to delays
↑
Cloud base down to 400 ft, visibility down to 0.3 mi forecast at SEA that day
↑
DEN is busy at that time
↓
Early flights usually leave on time
↓
Mostly benign weather forecast at DEN
Weather at each end
DEN (origin)
Gusts 18 kt Ceiling none (clear) Visibility 10+ mi Precip none
SEA (destination)
Gusts 6 kt Ceiling 400 ft Visibility 0.8 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.