Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
REPUBLIC · FLIGHT YX 3543
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
YX 3543 · BOS → IAD
departs 6:05 PM ET · arrives 8:20 PM ET
Forecast issued Fri 2:00 PM ET · 4h before departure
Watch this flight
Other days
Today
Sat 10/3 11%
Sun 10/4 30%
Mon 10/5 22%
Wed 10/7 30%
Odds over time
Arrive at IAD more than 15 minutes late?
56%
chance · ±0 pts
+34 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
56%
Leave 15+ late
62%
Arrive 1h+ late
56%
Cancelled
7%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
3.8d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at IAD more than 15 minutes late?
Calm-weather odds: 12% · changed +34 pts in 24h
+34 pts
56%
Yes 56%
No 44%
Leave BOS more than 15 minutes late?
Calm-weather odds: 15% · changed +41 pts in 24h
+41 pts
62%
Yes 62%
No 38%
Arrive at IAD more than an hour late?
Calm-weather odds: 5% · changed +48 pts in 24h
+48 pts
56%
Yes 56%
No 44%
Cancelled?
Calm-weather odds: <1% · changed +6 pts in 24h
+6 pts
7%
Yes 7%
No 93%
How late will it get to IAD?
On time or early
41%
15–30 min late
14%
30 min–1 hour late
0%
1–2 hours late
27%
Over 2 hours late
11%
Cancelled
7%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Mostly benign weather forecast at BOS
↑
Later flights pick up delays from earlier in the day
↑
BOS is prone to delays
↓
Other factors
↓
YX's recent on-time record
Weather at each end
BOS (origin)
Gusts 22 kt Ceiling 7,000 ft Visibility 10+ mi Precip 0.14 in
IAD (destination)
Gusts 15 kt Ceiling 6,000 ft Visibility 10+ 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.