Carrier route record
OHPHL→PWM
PSA Airlines · Philadelphia to Portland
- Flights
- 200
- Period
- July 2025 to June 2026
- Share of route
- 27%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with PSA Airlines.
PSA on PHL to PWM lands a B−, 2 points worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 200 flights, with a median arrival 11 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate PSA on PHL to PWM from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.1%
Arrivals under 15 minutes late, of 184 completed flights
Avg delay
110 min
Across delayed arrivals only, not all flights
Cancelled
8.00%
National rate is 1.81%
Whole route
75.8%
Every carrier on PHL to PWM, 729 flights
These figures cover 200 flights between July 2025 and June 2026. Beyond the headline rate, 13.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
PSA against every carrier on PHL to PWM
PSA flew 200 of the 729 flights on PHL to PWM, about 27% of it. Its 76.1% on time is about level with the route as a whole at 75.8%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Republic at 100.0% to American at 75.6%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 1 | 100.0% | — | 0.00% | A+ |
| PSA Airlines (this page)thin sample | 200 | 76.1% | 110 min | 8.00% | B− |
| American Airlines | 528 | 75.6% | 83 min | 1.70% | B |
Departure window
When PSA runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 200 flights.
- 5am–8am—
- 8am–11am116 flights79.8%
- 11am–2pm12 flights—
- 2pm–5pm11 flights—
- 5pm–8pm5 flights—
- 8pm–5am56 flights70.2%
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 79.8% of the time, against 70.2% for the overnight window. That is 10 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 116 flights scheduled in it.
Across the year
PSA on PHL to PWM through the year
- Jul–Sep 202523 flights—
- Oct–Dec 202525 flights—
- Jan–Mar 2026131 flights74.8%
- Apr–Jun 202621 flights—
Scale runs 65% to 80%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 76.1% on time across 200 flights.
Split by quarter, PSA on PHL to PWM logged 23 flights in Jul–Sep 2025, 25 flights in Oct–Dec 2025, 131 flights in Jan–Mar 2026 and 21 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 76.1% annual figure is the one to use.
Across the week, Tuesday is the strongest day at 93.8% on time and Saturday the weakest at 69.7%. 24 points is a smaller lever than departure hour, but it is free.
Delay causes
Why PSA runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 49% of the 4,820 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 49%Late-arriving aircraft
- 42%Carrier
- 5%Extreme weather
- 4%National Airspace System
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 4,820 reported delay minutes here, that single category outweighs weather by 11 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 4,820 reported delay minutes.
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,030 of the 4,820 delay minutes reported here.
Cancellations run at 8.00%, against 1.81% nationally. That is about one flight in twelve cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 13.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 364 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.
The return leg runs 78.6% on time across 200 flights, within 3 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 200 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking PSA on PHL to PWM
Put together: the delay figures matter less here than the 8.00% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 184 completed flights over 12 months sit behind that.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.