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 4377
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
YX 4377 · LGA → BOS
departs 6:00 AM ET · arrives 7:20 AM ET
Forecast issued Fri 3:00 AM ET · 3h before departure
Watch this flight
Other days
Today
Sat 10/3 4%
Mon 10/5 6%
Tue 10/6 4%
Wed 10/7 4%
Odds over time
Arrive at BOS more than 15 minutes late?
5%
chance · ±0 pts
+2 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
5%
Leave 15+ late
7%
Arrive 1h+ late
4%
Cancelled
4%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
3%
6%
9%
12%
3.3d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at BOS more than 15 minutes late?
Calm-weather odds: 2% · changed +2 pts in 24h
+2 pts
5%
Yes 5%
No 95%
Leave LGA more than 15 minutes late?
Calm-weather odds: 5% · changed +3 pts in 24h
+3 pts
7%
Yes 7%
No 93%
Arrive at BOS more than an hour late?
Calm-weather odds: 1% · changed +2 pts in 24h
+2 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +3 pts in 24h
+3 pts
4%
Yes 4%
No 96%
How late will it get to BOS?
On time or early
91%
15–30 min late
3%
30 min–1 hour late
0%
1–2 hours late
2%
Over 2 hours late
<1%
Cancelled
4%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↓
Early flights usually leave on time
↓
6am departures from LGA are usually not late
Weather at each end
LGA (origin)
Gusts 18 kt Ceiling 3,500 ft Visibility 10+ mi Precip 0.04 in
BOS (destination)
Gusts 21 kt Ceiling 4,500 ft Visibility 10+ mi Precip 0.08 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.