Route
BWI → ISP
Baltimore/Washington International Thurgood Marshall Airport Long Island MacArthur Airport
How punctual is this route?
- On-time arrivals
- 77.8%
- Less than 15 minutes late
- Cancelled
- 1.9%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,260
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Airline (crew, maintenance, cleaning) 40%
- Air traffic control & airport 7%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 83.3% | 90 |
| October 2025 | 85.9% | 93 |
| November 2025 | 79.8% | 91 |
| December 2025 | 72.2% | 93 |
| January 2026 | 88.9% | 93 |
| February 2026 | 86.2% | 85 |
| March 2026 | 71.4% | 89 |
| April 2026 | 82.2% | 107 |
| May 2026 | 71.1% | 114 |
| June 2026 | 77.4% | 138 |
| July 2026 | 73.4% | 146 |
| August 2026 | 68.3% | 121 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 1,260 | 77.8% | 1.9% | 57 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN684
27% late · 76 flights
-
WN4126
38% late · 60 flights
-
WN4321
47% late · 60 flights
-
WN1156
12% late · 58 flights
-
WN4775
11% late · 58 flights
-
WN921
16% late · 58 flights
-
WN4691
10% late · 51 flights
-
WN2137
12% late · 50 flights
-
WN3161
36% late · 50 flights
-
WN1698
12% late · 42 flights
-
WN4816
5% late · 42 flights
-
WN4494
10% late · 41 flights
-
WN2357
24% late · 34 flights
-
WN2053
53% late · 32 flights
-
WN1533
10% late · 31 flights
-
WN1757
27% late · 30 flights
-
WN2153
15% late · 27 flights
-
WN966
26% late · 27 flights
-
WN1537
21% late · 24 flights
-
WN2080
21% late · 24 flights
-
WN2413
22% late · 23 flights
-
WN113
9% late · 22 flights
-
WN3566
24% late · 22 flights
-
WN2202
0% late · 20 flights
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