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.
REPUBLIC · FLIGHT YX 3430
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
YX 3430 · BUF → IAD
departs 10:34 AM ET · arrives 11:50 AM ET
Forecast issued Sat 1:00 PM ET · 46h before departure
Watch this flight
Other days
Sun 10/4 16%
Mon 10/5
Fri 10/9 8%
Odds over time
Arrive at IAD more than 15 minutes late?
8%
chance · ±0 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
8%
Leave 15+ late
8%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
6.4d
Now
1d
12h
6h
Departs
Lands
Arrive at IAD more than 15 minutes late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
8%
Yes 8%
No 92%
Leave BUF more than 15 minutes late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
8%
Yes 8%
No 92%
Arrive at IAD more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to IAD?
On time or early
92%
15–30 min late
3%
30 min–1 hour late
<1%
1–2 hours late
2%
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
↑
Other factors
↓
Mostly benign weather forecast at BUF
↓
YX's recent on-time record
Weather at each end
BUF (origin)
Gusts 23 kt Ceiling 4,400 ft Visibility 10+ mi Precip none
IAD (destination)
Gusts 20 kt Ceiling 367 ft 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.