Route
BWI → PWM
Baltimore/Washington International Thurgood Marshall Airport Portland International Jetport
How punctual is this route?
- On-time arrivals
- 80.6%
- Less than 15 minutes late
- Cancelled
- 1.7%
- Of scheduled flights
- Average delay when late
- 51 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,331
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Airline (crew, maintenance, cleaning) 34%
- Air traffic control & airport 10%
- Extreme weather 6%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.6% | 121 |
| October 2025 | 85.4% | 123 |
| November 2025 | 83.2% | 107 |
| December 2025 | 78.7% | 108 |
| January 2026 | 87.1% | 97 |
| February 2026 | 84.4% | 94 |
| March 2026 | 79.4% | 106 |
| April 2026 | 77.7% | 103 |
| May 2026 | 75.5% | 106 |
| June 2026 | 78.6% | 118 |
| July 2026 | 71.2% | 124 |
| August 2026 | 79.3% | 124 |
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 | 1,331 | 80.6% | 1.7% | 51 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN4382
46% late · 61 flights
-
WN2365
21% late · 58 flights
-
WN2484
34% late · 58 flights
-
WN4687
17% late · 58 flights
-
WN1862
6% late · 54 flights
-
WN1065
14% late · 52 flights
-
WN4439
6% late · 52 flights
-
WN1277
35% late · 46 flights
-
WN4898
8% late · 36 flights
-
WN1163
12% late · 33 flights
-
WN1180
12% late · 33 flights
-
WN3681
9% late · 33 flights
-
WN1275
6% late · 32 flights
-
WN2695
38% late · 32 flights
-
WN1882
3% late · 31 flights
-
WN1883
3% late · 31 flights
-
WN443
26% late · 31 flights
-
WN1908
21% late · 29 flights
-
WN2603
19% late · 27 flights
-
WN297
19% late · 27 flights
-
WN2699
40% late · 25 flights
-
WN1274
17% late · 24 flights
-
WN4195
12% late · 24 flights
-
WN396
10% late · 21 flights
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