PlainFlights

Route · DTW → PWM · 2020–2025 BTS data

Detroit to Portland

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), DTW to PWM (Detroit to Portland) ranks #2958 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

84.7%
On-time
+5.7 pts
vs US avg
81 min
Delay when late
3,848
Flights
#2958 of 4927
Corpus placement

Cancelled

0.5%

Best Month

May 2025 95%

Worst Month

Dec 2024 66%

Distance

668 mi

Carriers

16

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 40 14 0 0 DL,OO
Nov 2025 36 6 1 0 DL
Oct 2025 61 5 0 0 DL
Sep 2025 60 9 0 0 DL
Aug 2025 61 13 0 0 DL
Jul 2025 58 8 0 0 YX,DL
Jun 2025 58 9 1 0 DL,YX
May 2025 55 3 0 0 DL,YX
Jan 2025 34 10 0 0 OO
Dec 2024 61 21 1 0 OO,YX
Nov 2024 76 18 0 0 OO,9E
Oct 2024 85 24 0 0 OO
Sep 2024 84 13 0 1 OO
Aug 2024 82 9 0 0 YX,9E
Jul 2024 83 15 0 0 DL,YX
Jun 2024 72 13 1 2 DL,YX
May 2024 31 12 0 0 DL
Apr 2024 30 4 1 0 DL
Mar 2024 31 4 0 0 9E,DL
Jan 2024 31 9 2 0 9E
Dec 2023 31 7 0 1 OO,9E
Nov 2023 56 4 0 0 9E
Oct 2023 62 5 0 0 9E
Sep 2023 60 12 0 0 9E,DL

DTW–PWM seasonal on-time pattern

Best: October (88.9%) · weakest: December (75.4%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 75.4%

Strongest calendar month

October

88.9% on-time · ~66 flights/mo

Busiest calendar month

July

~76 flights/mo avg

Weakest calendar month

December

75.4% on-time · ~48 flights/mo

Cancellation Rate

0.5%

7 of 1,338 flights

Diversion Rate

0.3%

4 of 1,338 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

DTW - Detroit

Full on-time, delay-cause, and seasonal performance for Detroit, MI.

DTW on-time profile

PWM - Portland

Full on-time, delay-cause, and seasonal performance for Portland, ME.

PWM on-time profile

Compare the two airports

See DTW and PWM side by side on delays, cancellations, and reliability.

Compare DTW vs PWM

Origin-hub reliability standing

Mid-pack among DTW departures

From DTW, this corridor sits with 60 other 75–85% on-time routes out of 94 tracked departures, not the hub's reliability leaders (34 at ≥85%) and not the softest ( 0 below 75%). Destination: Portland · fleet on-time rank #1328 of 4927.

What the Data Says About DTW to PWM

Bureau of Transportation Statistics records show Detroit to Portland (DTW to PWM) running a 84.7% on-time rate over 3,848 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 81.2 minutes. The 668-mile corridor is served by 16 carriers, and over the last 24 months 0.5% of 1,338 flights were cancelled, 0.3% diverted.

The monthly split is wide on this route: May 2025 posted the strongest performance at 95% on-time, while Dec 2024 came in at just 66% - a 29-point swing worth factoring into travel timing.

On the multi-year calendar, DTW–PWM peaks in October at 88.9% on-time while July carries the heaviest traffic (~76 flights per month) ; the softest month is December at 75.4%, a 13.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does DTW to PWM rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, DTW to PWM ranks #2958 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from DTW to PWM? ▼
Flights from Detroit to Portland have a 84.7% on-time rate based on 3,848 flights. The average delay is 81.2 minutes. The best recent month was May 2025 with 95% on-time.
What is the cancellation rate for DTW to PWM? ▼
Over the last 24 months, 0.5% of flights on this route were cancelled (7 of 1,338 flights) and 0.3% were diverted.
How far is the flight from DTW to PWM? ▼
The flight distance from Detroit (DTW) to Portland (PWM) is approximately 668 miles. This route is served by 16 carriers.
When is the best time to fly from DTW to PWM? ▼
The best recent month for on-time performance was May 2025 (95% on-time). The worst was Dec 2024 (66% on-time). Consider booking during months with historically better performance.

Airports on this route

DTW Airport

Detroit
PWM Airport

Portland
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 DTW–PWM data

DTW–PWM runs 5.7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare DTW and PWM airport profiles: delay causes and top routes differ even on the same corridor. DTW airport
  • If your dates flex, October (88.9% on-time) beats December (75.4%) on this corridor. Seasonal chart
  • 4 other routes post a similar 84.7% 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.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

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.