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Route · PWM → PHL · 2020–2025 BTS data

Portland to Philadelphia

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PWM to PHL (Portland to Philadelphia) ranks #2635 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

83.2%
On-time
+4.2 pts
vs US avg
107 min
Delay when late
4,607
Flights
#2635 of 4927
Corpus placement

Cancelled

2.0%

Best Month

Nov 2023 93%

Worst Month

Aug 2024 66%

Distance

364 mi

Carriers

18

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Oct 2025 100 29 1 1 AA,OH
Sep 2025 102 16 0 0 OH,AA
Aug 2025 119 26 1 0 AA,OH
Jul 2025 112 34 5 0 AA,OH
Jun 2025 93 28 3 1 AA,OH
May 2025 93 26 4 0 AA,OH
Apr 2025 81 17 0 0 OH,AA
Jan 2025 34 10 3 0 AA,OH
Dec 2024 83 12 0 0 AA,OH,YX
Nov 2024 87 7 0 0 YX,OH,AA
Oct 2024 97 13 1 0 AA
Sep 2024 118 21 0 0 OH,AA
Aug 2024 122 42 7 0 AA,F9,OH
Jul 2024 111 34 3 0 AA,F9,OH,YX
Jun 2024 128 34 4 1 AA,F9,OH,YX
May 2024 95 9 3 0 AA,F9,OH,YX
Apr 2024 38 8 1 0 AA,OH,YX
Mar 2024 31 4 0 0 AA
Jan 2024 31 8 1 0 AA,OH
Dec 2023 34 3 0 0 OH,YX
Nov 2023 60 4 0 0 AA,OH,YX
Oct 2023 92 15 0 0 AA
Sep 2023 88 22 4 0 AA
Aug 2023 93 24 0 0 AA

PWM–PHL seasonal on-time pattern

Best: March (92.7%) · weakest: July (77.4%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 88.5%

Strongest calendar month

March

92.7% on-time · ~41 flights/mo

Busiest calendar month

August

~107 flights/mo avg

Weakest calendar month

July

77.4% on-time · ~102 flights/mo

Cancellation Rate

2.0%

41 of 2,042 flights

Diversion Rate

0.1%

3 of 2,042 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.

PWM on-time profile

PHL - Philadelphia

Full on-time, delay-cause, and seasonal performance for Philadelphia, PA.

PHL on-time profile

Compare the two airports

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

Compare PWM vs PHL

Origin-hub reliability standing

Mid-pack among PWM departures

From PWM, this corridor sits with 9 other 75–85% on-time routes out of 12 tracked departures, not the hub's reliability leaders (2 at ≥85%) and not the softest ( 1 below 75%). Destination: Philadelphia · fleet on-time rank #1890 of 4927.

What the Data Says About PWM to PHL

Bureau of Transportation Statistics records show Portland to Philadelphia (PWM to PHL) running a 83.2% on-time rate over 4,607 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 107.0 minutes. The 364-mile corridor is served by 18 carriers, and over the last 24 months 2.0% of 2,042 flights were cancelled, 0.1% diverted.

The monthly split is wide on this route: Nov 2023 posted the strongest performance at 93% on-time, while Aug 2024 came in at just 66% - a 28-point swing worth factoring into travel timing.

On the multi-year calendar, PWM–PHL peaks in March at 92.7% on-time while August carries the heaviest traffic (~107 flights per month) ; the softest month is July at 77.4%, 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 PWM to PHL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, PWM to PHL ranks #2635 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 PWM to PHL? ▼
Flights from Portland to Philadelphia have a 83.2% on-time rate based on 4,607 flights. The average delay is 107.0 minutes. The best recent month was Nov 2023 with 93% on-time.
What is the cancellation rate for PWM to PHL? ▼
Over the last 24 months, 2.0% of flights on this route were cancelled (41 of 2,042 flights) and 0.1% were diverted.
How far is the flight from PWM to PHL? ▼
The flight distance from Portland (PWM) to Philadelphia (PHL) is approximately 364 miles. This route is served by 18 carriers.
When is the best time to fly from PWM to PHL? ▼
The best recent month for on-time performance was Nov 2023 (93% on-time). The worst was Aug 2024 (66% on-time). Consider booking during months with historically better performance.

Airports on this route

PWM Airport

Portland
PHL Airport

Philadelphia
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 PWM–PHL data

PWM–PHL runs 4.2 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare PWM and PHL airport profiles: delay causes and top routes differ even on the same corridor. PWM airport
  • If your dates flex, March (92.7% on-time) beats July (77.4%) on this corridor. Seasonal chart
  • 4 other routes post a similar 83.2% 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.