Route
BWI → BUF
Baltimore/Washington International Thurgood Marshall Airport Buffalo Niagara International Airport
How punctual is this route?
- On-time arrivals
- 75.9%
- Less than 15 minutes late
- Cancelled
- 2.1%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,727
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 46%
- Airline (crew, maintenance, cleaning) 36%
- Air traffic control & airport 15%
- Extreme weather 3%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.1% | 147 |
| October 2025 | 80.5% | 149 |
| November 2025 | 84.5% | 144 |
| December 2025 | 68.3% | 152 |
| January 2026 | 83.6% | 128 |
| February 2026 | 80.5% | 129 |
| March 2026 | 62.9% | 145 |
| April 2026 | 79.1% | 148 |
| May 2026 | 70.8% | 154 |
| June 2026 | 76.9% | 150 |
| July 2026 | 73.6% | 154 |
| August 2026 | 62.3% | 127 |
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 | 1,727 | 75.9% | 2.1% | 57 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN1461
12% late · 62 flights
-
WN1624
37% late · 62 flights
-
WN854
20% late · 58 flights
-
WN910
12% late · 57 flights
-
WN2179
35% late · 54 flights
-
WN1076
10% late · 50 flights
-
WN3769
46% late · 50 flights
-
WN2777
9% late · 47 flights
-
WN768
47% late · 44 flights
-
WN4566
16% late · 43 flights
-
WN2737
26% late · 42 flights
-
WN762
14% late · 36 flights
-
WN894
22% late · 36 flights
-
WN1446
12% late · 35 flights
-
WN4577
36% late · 35 flights
-
WN1110
62% late · 33 flights
-
WN1295
9% late · 33 flights
-
WN754
18% late · 33 flights
-
WN1427
34% late · 32 flights
-
WN1757
17% late · 30 flights
-
WN792
30% late · 30 flights
-
WN1972
19% late · 28 flights
-
WN3345
44% late · 28 flights
-
WN1182
19% late · 27 flights
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