Route
BWI → BOS
Baltimore/Washington International Thurgood Marshall Airport Boston Logan International Airport
How punctual is this route?
- On-time arrivals
- 74.1%
- Less than 15 minutes late
- Cancelled
- 3.2%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,540
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 40%
- Airline (crew, maintenance, cleaning) 30%
- Late-arriving aircraft 26%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 60.2% | 288 |
| October 2025 | 67.9% | 336 |
| November 2025 | 85.1% | 293 |
| December 2025 | 72.9% | 274 |
| January 2026 | 83.6% | 239 |
| February 2026 | 83.2% | 235 |
| March 2026 | 74.3% | 266 |
| April 2026 | 78.6% | 324 |
| May 2026 | 74.3% | 316 |
| June 2026 | 73.9% | 302 |
| July 2026 | 71.5% | 326 |
| August 2026 | 69.3% | 341 |
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 | 2,415 | 71.1% | 2.8% | 65 min |
| Republic Airways | 1,099 | 80.5% | 4.1% | 88 min |
| NK | 26 | 80.8% | 0.0% | 37 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
YX5644
35% late · 304 flights
-
YX5703
9% late · 250 flights
-
YX5668
24% late · 203 flights
-
YX5813
4% late · 154 flights
-
YX5842
13% late · 96 flights
-
YX5849
24% late · 81 flights
-
WN1599
18% late · 64 flights
-
WN1058
11% late · 61 flights
-
WN884
16% late · 60 flights
-
WN892
45% late · 60 flights
-
WN1062
9% late · 58 flights
-
WN851
22% late · 58 flights
-
WN856
38% late · 56 flights
-
WN850
10% late · 55 flights
-
WN4941
2% late · 53 flights
-
WN211
37% late · 52 flights
-
WN883
8% late · 52 flights
-
WN887
25% late · 52 flights
-
WN942
0% late · 49 flights
-
WN727
25% late · 44 flights
-
WN1064
40% late · 42 flights
-
WN3182
12% late · 42 flights
-
WN4422
30% late · 41 flights
-
WN753
22% late · 41 flights
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