Portland International Jetport in September 2023

76.7%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In September 2023, reporting carriers scheduled 1,188 domestic departures from Portland International Jetport (PWM). 76.7% left less than 15 minutes late and 76.3% reached their destination on time; 4.1% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.1% arrived on time, so PWM departures were 3.8 points below the national departure figure.

Flights arriving at PWM that month were on time 74.4% of the time (1,190 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 42%, national aviation system 28% and late-arriving aircraft 26%.

On time 76.3%
Arrived 15+ minutes late 19.5%
Cancelled 4.1%
Diverted 0.0%

Every scheduled departure from PWM in September 2023, judged by arrival at the destination.

September 2023 against a year earlier, the airport's year and the nation

Measure	Sep 2023	Year earlier	PWM, 12 months to Jul 2026	All reported flights, Sep 2023
Departed on time	76.7%	—	80.0%	80.5%
Arrived on time	76.3%	—	78.2%	80.1%
Cancelled	4.1%	—	2.6%	1.2%
Average departure delay (late minutes only)	21.2 min	—	17.2 min	14.1 min
Scheduled departures a day	40	—	30	18,978
Scheduled departures	1,188	—	10,925	569,338

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	250	21%	74.8%	21.2 min	2.4%
YX Republic Airline	182	15%	78.0%	3.7 min	11.0%
9E Endeavor Air	180	15%	72.8%	6.6 min	5.0%
UA United Airlines	165	14%	77.0%	30.0 min	3.0%
WN Southwest Airlines	149	13%	83.9%	4.4 min	0.0%
DL Delta Air Lines	95	8%	73.7%	10.4 min	0.0%
B6 JetBlue Airways	78	7%	71.8%	7.7 min	7.7%
MQ Envoy Air	55	5%	76.4%	-0.1 min	1.8%
OH PSA Airlines	28	2%	82.1%	-7.8 min	3.6%
F9 Frontier Airlines	6	1%	66.7%	23.2 min	16.7%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PWM–LGA	Portland to New York	157	80.9%	2.2 min	7.0%
PWM–EWR	Portland to Newark	142	78.2%	11.5 min	7.7%
PWM–JFK	Portland to New York	120	63.3%	15.9 min	10.0%
PWM–BWI	Portland to Baltimore	119	86.6%	2.4 min	0.0%
PWM–ORD	Portland to Chicago	115	77.4%	7.1 min	2.6%
PWM–PHL	Portland to Philadelphia	88	70.5%	19.5 min	4.5%
PWM–DCA	Portland to Washington	85	80.0%	23.1 min	2.4%
PWM–CLT	Portland to Charlotte	81	80.2%	13.1 min	1.2%
PWM–IAD	Portland to Washington	65	75.4%	40.0 min	4.6%
PWM–ATL	Portland to Atlanta	60	71.7%	10.5 min	0.0%
PWM–DTW	Portland to Detroit	60	78.3%	1.5 min	1.7%
PWM–MSP	Portland to Minneapolis	31	67.7%	18.5 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), September 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2023	Minutes
Air carrier	41.6%	36.4%	9,834
Late-arriving aircraft	26.1%	38.3%	6,176
National Aviation System	28.4%	19.9%	6,702
Extreme weather	3.9%	5.1%	912
Security	0.0%	0.2%	0

23,624 delay minutes on 232 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left PWM on time in September 2023?

76.7% of 1,188 scheduled domestic departures left less than 15 minutes late, and 76.3% reached their destination on time. The national figures that month were 80.5% and 80.1%.

How does that compare with a year earlier?

September 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for PWM · methodology · corrections.