Portland International in August 2025

83.0%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 August 2025, reporting carriers scheduled 5,685 domestic departures from Portland International (PDX). 83.0% left less than 15 minutes late and 80.1% reached their destination on time; 0.7% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so PDX departures were 6.2 points above the national departure figure.

A year earlier, in August 2024, the airport had 5,542 departures with 82.8% leaving on time: a change of +0.2 points, with flights up 3%.

Flights arriving at PDX that month were on time 80.3% of the time (5,687 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 38%, late-arriving aircraft 37% and national aviation system 24%.

On time 80.1%
Arrived 15+ minutes late 18.9%
Cancelled 0.7%
Diverted 0.3%

Every scheduled departure from PDX in August 2025, judged by arrival at the destination.

August 2025 against a year earlier, the airport's year and the nation

Measure	Aug 2025	Aug 2024	PDX, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	83.0%	82.8%	82.7%	76.8%
Arrived on time	80.1%	81.4%	82.0%	76.3%
Cancelled	0.7%	0.7%	0.7%	1.1%
Average departure delay (late minutes only)	11.8 min	12.4 min	11.6 min	17.6 min
Scheduled departures a day	190	185	173	20,079
Scheduled departures	5,685	5,542	63,282	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AS Alaska Airlines	1,743	31%	79.9%	5.0 min	0.7%
OO SkyWest Airlines	975	17%	83.7%	3.0 min	0.2%
WN Southwest Airlines	832	15%	78.8%	7.1 min	0.1%
DL Delta Air Lines	702	12%	86.6%	-0.1 min	0.9%
UA United Airlines	650	11%	79.8%	4.7 min	0.9%
AA American Airlines	415	7%	73.5%	12.1 min	1.9%
F9 Frontier Airlines	138	2%	68.8%	11.5 min	2.2%
HA Hawaiian Airlines	84	1%	65.5%	17.3 min	0.0%
G4 Allegiant Air	74	1%	68.9%	67.5 min	0.0%
NK Spirit Airlines	41	1%	85.4%	-3.6 min	0.0%
B6 JetBlue Airways	31	1%	71.0%	16.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PDX–SEA	Portland to Seattle	444	80.2%	3.2 min	0.5%
PDX–DEN	Portland to Denver	436	74.3%	10.1 min	0.5%
PDX–LAX	Portland to Los Angeles	412	82.0%	2.8 min	1.5%
PDX–SFO	Portland to San Francisco	325	81.2%	5.6 min	0.3%
PDX–ORD	Portland to Chicago	294	74.1%	9.6 min	0.7%
PDX–LAS	Portland to Las Vegas	274	82.1%	3.9 min	0.4%
PDX–PHX	Portland to Phoenix	273	76.2%	9.6 min	0.4%
PDX–DFW	Portland to Dallas/Fort Worth	241	70.5%	13.0 min	2.9%
PDX–SLC	Portland to Salt Lake City	222	84.2%	4.6 min	0.5%
PDX–SMF	Portland to Sacramento	190	82.6%	4.1 min	0.5%
PDX–ATL	Portland to Atlanta	163	86.5%	-5.8 min	0.6%
PDX–SAN	Portland to San Diego	147	74.8%	11.5 min	1.4%

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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	38.0%	33.1%	24,290
Late-arriving aircraft	37.0%	40.5%	23,672
National Aviation System	23.6%	19.2%	15,112
Extreme weather	1.1%	7.0%	711
Security	0.3%	0.1%	219

64,004 delay minutes on 1,073 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 PDX on time in August 2025?

83.0% of 5,685 scheduled domestic departures left less than 15 minutes late, and 80.1% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 82.8% of 5,542 departures left on time and 0.7% were cancelled, against 83.0% and 0.7% in August 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for PDX · methodology · corrections.