Route · BWI → PWM · 2020–2025 BTS data
Baltimore to Portland
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BWI to PWM (Baltimore to Portland) ranks #1748 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 75.9%
- On-time
- -3.1 pts
- vs US avg
- 52 min
- Delay when late
- 7,227
- Flights
- #1748 of 4927
- Corpus placement
Cancelled
1.0%
Best Month
Feb 2025 91%
Worst Month
Jul 2025 55%
Distance
452 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 108 | 23 | 0 | 0 | WN |
| Nov 2025 | 107 | 18 | 0 | 0 | WN |
| Oct 2025 | 123 | 18 | 0 | 0 | WN |
| Sep 2025 | 121 | 15 | 0 | 0 | WN |
| Aug 2025 | 135 | 25 | 0 | 0 | WN |
| Jul 2025 | 123 | 55 | 5 | 0 | WN |
| Jun 2025 | 119 | 42 | 0 | 0 | WN |
| May 2025 | 115 | 28 | 0 | 0 | WN |
| Apr 2025 | 107 | 19 | 0 | 0 | WN |
| Mar 2025 | 94 | 16 | 0 | 1 | WN |
| Feb 2025 | 92 | 8 | 4 | 1 | WN |
| Jan 2025 | 97 | 16 | 1 | 0 | WN |
| Dec 2024 | 106 | 27 | 0 | 0 | WN |
| Nov 2024 | 106 | 24 | 0 | 0 | WN |
| Oct 2024 | 124 | 17 | 0 | 0 | WN |
| Sep 2024 | 120 | 27 | 1 | 0 | WN |
| Aug 2024 | 124 | 38 | 2 | 0 | WN |
| Jul 2024 | 124 | 41 | 0 | 1 | WN |
| Jun 2024 | 117 | 39 | 2 | 0 | WN |
| May 2024 | 93 | 38 | 1 | 0 | WN |
| Apr 2024 | 90 | 22 | 5 | 1 | WN |
| Mar 2024 | 92 | 24 | 1 | 0 | WN |
| Feb 2024 | 83 | 13 | 0 | 0 | WN |
| Jan 2024 | 91 | 27 | 5 | 0 | WN |
BWI–PWM seasonal on-time pattern
Best: February (85.9%) · weakest: June (68.8%)
Strongest calendar month
February
85.9% on-time · ~80 flights/mo
Busiest calendar month
August
~123 flights/mo avg
Weakest calendar month
June
68.8% on-time · ~103 flights/mo
Cancellation Rate
1.0%
27 of 2,611 flights
Diversion Rate
0.2%
4 of 2,611 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
BWI on-time profilePWM - Portland
Full on-time, delay-cause, and seasonal performance for Portland, ME.
PWM on-time profileCompare the two airports
See BWI and PWM side by side on delays, cancellations, and reliability.
Compare BWI vs PWMOrigin-hub reliability standing
Mid-pack among BWI departures
From BWI, this corridor sits with 53 other 75–85% on-time routes out of 64 tracked departures, not the hub's reliability leaders (0 at ≥85%) and not the softest ( 11 below 75%). Destination: Portland · fleet on-time rank #4316 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to BWI–PWM.
Routes with a similar on-time rate
What the Data Says About BWI to PWM
The Baltimore to Portland corridor (BWI to PWM) posts a 75.9% on-time rate on the lower edge of the average band, based on 7,227 tracked flights. Late flights run 51.8 minutes behind on average. 1 carrier cover the 452-mile route; over the last 24 months, 27 of 2,611 flights were cancelled (1.0%) and 0.2% diverted.
The monthly split is wide on this route: Feb 2025 posted the strongest performance at 91% on-time, while Jul 2025 came in at just 55% - a 36-point swing worth factoring into travel timing.
On the multi-year calendar, BWI–PWM peaks in February at 85.9% on-time while August carries the heaviest traffic (~123 flights per month) ; the softest month is June at 68.8%, a 17.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does BWI to PWM rank among US routes by traffic? ▼
How often are flights delayed from BWI to PWM? ▼
What is the cancellation rate for BWI to PWM? ▼
How far is the flight from BWI to PWM? ▼
When is the best time to fly from BWI to PWM? ▼
Airports on this route
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.
Using BWI–PWM data
BWI–PWM is mid-pack at 75.9% on-time; month and carrier mix move more than the corridor headline.
- Compare BWI and PWM airport profiles: delay causes and top routes differ even on the same corridor. BWI airport
- If your dates flex, February (85.9% on-time) beats June (68.8%) on this corridor. Seasonal chart
- 4 other routes post a similar 75.9% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.