Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 735
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
WN 735 · DEN → BOS
departs 1:20 PM MT · arrives 7:10 PM ET
Forecast issued Wed 4:00 AM ET · 35h before departure
Watch this flight
Other days
Today 44%
Thu 10/1
Fri 10/2 46%
Sun 10/4 50%
Mon 10/5 43%
Tue 10/6 27%
Odds over time
Arrive at BOS more than 15 minutes late?
38%
chance · ±6 pts
−5 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
38%
Leave 15+ late
39%
Arrive 1h+ late
8%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at BOS more than 15 minutes late?
Calm-weather odds: 26% · changed −5 pts in 24h
−5 pts
38%
Yes 38%
No 62%
Leave DEN more than 15 minutes late?
Calm-weather odds: 35% · changed −5 pts in 24h
−5 pts
39%
Yes 39%
No 61%
Arrive at BOS more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to BOS?
On time or early
61%
15–30 min late
19%
30 min–1 hour late
11%
1–2 hours late
6%
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
↑
This flight has been late 46% of the time recently
↑
Arrivals into BOS at that hour are often late
↑
WN's recent on-time record
↓
Mostly benign weather forecast at DEN
↓
Visibility down to 1 mi forecast at BOS that day
Weather at each end
DEN (origin)
Gusts 22 kt Ceiling 9,000 ft Visibility 7 mi Precip 0.03 in
BOS (destination)
Gusts 16 kt Ceiling none (clear) Visibility 1 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.