Portland International in December 2023

87.4%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 December 2023, reporting carriers scheduled 4,763 domestic departures from Portland International (PDX). 87.4% left less than 15 minutes late and 85.5% reached their destination on time; 0.4% were cancelled.

Nationally that month, 83.1% of flights departed on time and 83.8% arrived on time, so PDX departures were 4.3 points above the national departure figure.

Flights arriving at PDX that month were on time 85.4% of the time (4,754 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 36%, late-arriving aircraft 33% and national aviation system 21%.

On time 85.5%
Arrived 15+ minutes late 14.1%
Cancelled 0.4%
Diverted 0.1%

Every scheduled departure from PDX in December 2023, judged by arrival at the destination.

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

Measure	Dec 2023	Year earlier	PDX, 12 months to Jul 2026	All reported flights, Dec 2023
Departed on time	87.4%	—	82.7%	83.1%
Arrived on time	85.5%	—	82.0%	83.8%
Cancelled	0.4%	—	0.7%	0.4%
Average departure delay (late minutes only)	8.5 min	—	11.6 min	11.6 min
Scheduled departures a day	159	—	173	19,013
Scheduled departures	4,763	—	63,282	570,394

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AS Alaska Airlines	1,345	28%	81.7%	2.7 min	0.7%
WN Southwest Airlines	906	19%	84.2%	2.5 min	0.6%
OO SkyWest Airlines	854	18%	86.1%	1.4 min	0.4%
DL Delta Air Lines	561	12%	93.2%	-5.4 min	0.0%
UA United Airlines	514	11%	87.2%	-0.1 min	0.0%
AA American Airlines	289	6%	86.2%	4.0 min	0.0%
NK Spirit Airlines	115	2%	87.0%	-4.2 min	0.0%
F9 Frontier Airlines	94	2%	92.6%	-4.1 min	0.0%
HA Hawaiian Airlines	58	1%	74.1%	25.7 min	0.0%
G4 Allegiant Air	27	1%	85.2%	-2.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PDX–SEA	Portland to Seattle	465	85.8%	3.0 min	1.3%
PDX–DEN	Portland to Denver	359	87.7%	0.2 min	0.3%
PDX–LAS	Portland to Las Vegas	358	87.7%	-3.3 min	0.0%
PDX–LAX	Portland to Los Angeles	344	83.4%	-1.2 min	0.0%
PDX–PHX	Portland to Phoenix	299	89.0%	0.7 min	0.3%
PDX–SFO	Portland to San Francisco	242	76.0%	7.1 min	0.4%
PDX–OAK	Portland to Oakland	238	87.4%	-0.3 min	1.3%
PDX–SJC	Portland to San Jose	231	86.6%	1.3 min	0.0%
PDX–DFW	Portland to Dallas/Fort Worth	180	88.9%	5.2 min	0.0%
PDX–SLC	Portland to Salt Lake City	172	90.7%	-3.1 min	0.0%
PDX–SMF	Portland to Sacramento	170	84.7%	2.2 min	0.0%
PDX–SAN	Portland to San Diego	141	87.9%	-2.7 min	0.7%

By scheduled departure hour

100

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

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

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2023	Minutes
Air carrier	36.1%	37.1%	13,715
Late-arriving aircraft	33.2%	38.8%	12,606
National Aviation System	21.3%	17.6%	8,098
Extreme weather	9.2%	6.2%	3,501
Security	0.2%	0.3%	60

37,980 delay minutes on 670 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 December 2023?

87.4% of 4,763 scheduled domestic departures left less than 15 minutes late, and 85.5% reached their destination on time. The national figures that month were 83.1% and 83.8%.

How does that compare with a year earlier?

December 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 December 2023; 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.