Route · PWM → BWI · 2020–2025 BTS data
Portland to Baltimore
The PWM–BWI corridor (Portland, ME → Baltimore, MD) runs ahead of the national average, served by 1 carrier across roughly 452 miles.
Data updated 2026-06-13
- 82.7%
- On-time
- +3.7 pts
- vs US avg
- 64 min
- Delay when late
- 7,230
- Flights
Cancelled
0.9%
Best Month
Feb 2024 94%
Worst Month
Jul 2025 67%
Distance
452 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 108 | 28 | 1 | 0 | WN |
| Nov 2025 | 108 | 14 | 0 | 0 | WN |
| Oct 2025 | 123 | 13 | 0 | 0 | WN |
| Sep 2025 | 121 | 11 | 0 | 0 | WN |
| Aug 2025 | 135 | 22 | 0 | 1 | WN |
| Jul 2025 | 123 | 41 | 3 | 1 | WN |
| Jun 2025 | 119 | 31 | 0 | 1 | WN |
| May 2025 | 115 | 18 | 0 | 0 | WN |
| Apr 2025 | 107 | 16 | 0 | 0 | WN |
| Mar 2025 | 94 | 14 | 0 | 0 | WN |
| Feb 2025 | 92 | 20 | 4 | 0 | WN |
| Jan 2025 | 97 | 13 | 2 | 0 | WN |
| Dec 2024 | 106 | 20 | 0 | 0 | WN |
| Nov 2024 | 107 | 11 | 0 | 0 | WN |
| Oct 2024 | 124 | 22 | 0 | 0 | WN |
| Sep 2024 | 120 | 19 | 0 | 0 | WN |
| Aug 2024 | 124 | 29 | 2 | 1 | WN |
| Jul 2024 | 124 | 36 | 0 | 1 | WN |
| Jun 2024 | 117 | 22 | 1 | 0 | WN |
| May 2024 | 93 | 28 | 0 | 0 | WN |
| Apr 2024 | 90 | 19 | 5 | 0 | WN |
| Mar 2024 | 92 | 18 | 0 | 0 | WN |
| Feb 2024 | 83 | 5 | 0 | 0 | WN |
| Jan 2024 | 91 | 19 | 5 | 0 | WN |
Cancellation Rate
0.9%
23 of 2,613 flights
Diversion Rate
0.2%
5 of 2,613 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PWM - Portland
Full on-time, delay-cause, and seasonal performance for Portland, ME.
Origin airport →BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
Destination airport →Compare the two airports
See PWM and BWI side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to PWM–BWI.
Routes with a similar on-time rate
What the Data Says About PWM to BWI
Bureau of Transportation Statistics records show Portland to Baltimore (PWM to BWI) running a 82.7% on-time rate over 7,230 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 63.9 minutes. The 452-mile corridor is served by 1 carrier, and over the last 24 months 0.9% of 2,613 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 94% on-time, while Jul 2025 came in at just 67% - a 27-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.