Route · ATL → PWM · 2020–2025 BTS data
Atlanta to Portland
The ATL–PWM corridor (Atlanta, GA → Portland, ME) runs ahead of the national average, served by 2 carriers across roughly 1,027 miles.
Data updated 2026-06-13
- 81.3%
- On-time
- +2.3 pts
- vs US avg
- 67 min
- Delay when late
- 2,717
- Flights
Cancelled
1.1%
Best Month
Sep 2025 90%
Worst Month
Jun 2025 55%
Distance
1,027 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 32 | 14 | 0 | 0 | DL |
| Nov 2025 | 59 | 13 | 1 | 0 | DL |
| Oct 2025 | 61 | 7 | 0 | 0 | DL |
| Sep 2025 | 61 | 6 | 0 | 0 | DL |
| Aug 2025 | 75 | 12 | 1 | 0 | DL |
| Jul 2025 | 92 | 34 | 2 | 0 | DL |
| Jun 2025 | 83 | 37 | 2 | 0 | DL |
| May 2025 | 54 | 19 | 0 | 0 | DL |
| Apr 2025 | 32 | 5 | 0 | 0 | DL |
| Mar 2025 | 31 | 11 | 0 | 0 | DL |
| Jan 2025 | 31 | 3 | 1 | 0 | DL |
| Dec 2024 | 32 | 10 | 0 | 0 | DL |
| Nov 2024 | 30 | 8 | 0 | 0 | DL |
| Oct 2024 | 56 | 7 | 0 | 0 | DL |
| Sep 2024 | 60 | 6 | 0 | 0 | DL |
| Aug 2024 | 62 | 16 | 0 | 1 | DL |
| Jul 2024 | 62 | 18 | 5 | 0 | DL |
| Jun 2024 | 54 | 7 | 0 | 0 | DL |
| May 2024 | 31 | 7 | 0 | 0 | DL |
| Apr 2024 | 30 | 5 | 1 | 0 | DL |
| Mar 2024 | 31 | 0 | 0 | 0 | DL |
| Jan 2024 | 31 | 3 | 0 | 0 | DL |
| Dec 2023 | 31 | 1 | 0 | 0 | DL |
| Nov 2023 | 34 | 1 | 0 | 0 | DL |
Cancellation Rate
1.1%
13 of 1,155 flights
Diversion Rate
0.1%
1 of 1,155 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ATL - Atlanta
Full on-time, delay-cause, and seasonal performance for Atlanta, GA.
Origin airport →PWM - Portland
Full on-time, delay-cause, and seasonal performance for Portland, ME.
Destination airport →Compare the two airports
See ATL and PWM side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to ATL–PWM.
Routes with a similar on-time rate
What the Data Says About ATL to PWM
2,717 tracked flights put the ATL to PWM pairing (Atlanta to Portland) at a 81.3% on-time rate, squarely in line with the wider network. Delays that do occur run 66.6 minutes on average. Across the 1,027-mile route and its 2 carriers, the trailing 24 months show 1.1% cancelled and 0.1% diverted (1,155 flights sampled).
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 90% on-time, while Jun 2025 came in at just 55% - a 35-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.