Route · ATL → PWM · 2020–2025 BTS data
Atlanta to Portland
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ATL to PWM (Atlanta to Portland) ranks #3435 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 81.3%
- On-time
- +2.3 pts
- vs US avg
- 67 min
- Delay when late
- 2,717
- Flights
- #3435 of 4927
- Corpus placement
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 |
ATL–PWM seasonal on-time pattern
Best: October (88.2%) · weakest: July (72.9%)
Strongest calendar month
October
88.2% on-time · ~54 flights/mo
Busiest calendar month
July
~64 flights/mo avg
Weakest calendar month
July
72.9% on-time · ~64 flights/mo
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.
ATL on-time profilePWM - Portland
Full on-time, delay-cause, and seasonal performance for Portland, ME.
PWM on-time profileCompare the two airports
See ATL and PWM side by side on delays, cancellations, and reliability.
Compare ATL vs PWMOrigin-hub reliability standing
Mid-pack among ATL departures
From ATL, this corridor sits with 75 other 75–85% on-time routes out of 144 tracked departures, not the hub's reliability leaders (67 at ≥85%) and not the softest ( 2 below 75%). Destination: Portland · fleet on-time rank #2597 of 4927.
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.
On the multi-year calendar, ATL–PWM peaks in October at 88.2% on-time while July carries the heaviest traffic (~64 flights per month) ; the softest month is July at 72.9%, a 15.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does ATL to PWM rank among US routes by traffic? ▼
How often are flights delayed from ATL to PWM? ▼
What is the cancellation rate for ATL to PWM? ▼
How far is the flight from ATL to PWM? ▼
When is the best time to fly from ATL 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 ATL–PWM data
ATL–PWM is mid-pack at 81.3% on-time; month and carrier mix move more than the corridor headline.
- Compare ATL and PWM airport profiles: delay causes and top routes differ even on the same corridor. ATL airport
- If your dates flex, October (88.2% on-time) beats July (72.9%) on this corridor. Seasonal chart
- 4 other routes post a similar 81.3% 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.