Airport month record

PDXJUN

Portland International in June 2026

Departures: 6,024
Month: June 2026
National, same month: 74.3%
Carriers: 9

Historical statistics for June 2026, not live status or a forecast for this year’s June. For today’s conditions at PDX, see live FAA status.

PDX in June lands a B+, 6 points better than the national rate of 74.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 6,024 flights, of which Delta Air Lines flew 642 at 87.8% on time.

Delta Air Lines is the most reliable of the six carriers covered here at 87.8% on time across 642 flights.

On time

80.3%

Arrivals under 15 minutes late, of 5,967 completed departures

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

0.61%

Nationally in June: 1.65%

Whole year

82.6%

PDX across all twelve months

These figures cover 6,024 departures from Portland International in June 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

June next to PDX's other months

Against PDX's own year, June ran 2 points worse than the twelve-month rate of 82.6%, which makes it number ten of twelve months, best first.

PDX month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	5,864	75.7%	65 min	1.18%	B
August 2025	5,685	80.9%	60 min	0.67%	B+
September 2025	5,269	83.7%	51 min	0.17%	B+
October 2025	5,493	82.1%	53 min	0.64%	B+
November 2025	4,976	84.2%	59 min	1.51%	B
December 2025	5,124	79.3%	59 min	0.60%	B+
January 2026	4,537	85.6%	66 min	1.41%	A
February 2026	4,182	86.3%	56 min	0.69%	A+
March 2026	5,113	86.3%	69 min	0.94%	A+
April 2026	5,040	86.1%	63 min	0.48%	A+
May 2026	5,535	83.9%	62 min	0.42%	B+
June 2026 (this page)	6,024	80.3%	65 min	0.61%	B+

Departure window

The best time of day to leave PDX in June

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 17 points, against 23 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,371 flights89.4%
8am–11am1,060 flights81.9%
11am–2pm891 flights77.9%
2pm–5pm865 flights77.2%
5pm–8pm879 flights72.3%
8pm–5am958 flights77.8%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 89.4% of the time, against 72.3% for the evening window. That is 17 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 1,371 flights scheduled in it.

Across the week, Tuesday is the strongest day at 85.7% on time and Thursday the weakest at 76.9%. 9 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at PDX in June

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 87.8% of the time; Southwest Airlines manages 64.7%. Sample sizes sit next to every figure, because a two-point gap across 843 flights means less than a ten-point one.

Carriers at PDX in June 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Alaska Airlines	2,200	83.7%	45 min	0.36%	B+
SkyWest Airlines	1,007	87.6%	60 min	0.00%	A+
Southwest Airlines	843	64.7%	52 min	0.24%	D+
United Airlines	657	77.9%	66 min	0.30%	B+
Delta Air Lines	642	87.8%	80 min	0.93%	A+
American Airlines	484	71.9%	114 min	3.31%	C−
Allegiant Airthin sample	78	63.6%	201 min	0.00%	D+
Frontier Airlinesthin sample	68	90.6%	61 min	4.41%	A−
JetBlue Airwaysthin sample	41	70.7%	56 min	0.00%	C+

American Airlines cancels 3.3% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

Route by route

Busiest routes out of PDX in June

Routes from PDX in June 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
PDX to DEN · Denver	435	78.1%	59 min	0.00%	B+
PDX to SEA · Seattle	404	84.2%	57 min	0.00%	B+
PDX to LAX · Los Angelesthin sample	358	91.5%	107 min	1.12%	A
PDX to ORD · Chicagothin sample	322	74.2%	73 min	1.55%	C
PDX to PHX · Phoenixthin sample	304	73.7%	85 min	0.00%	C+
PDX to SFO · San Franciscothin sample	289	53.3%	51 min	0.00%	F+
PDX to LAS · Las Vegasthin sample	250	77.2%	55 min	1.20%	B
PDX to SLC · Salt Lake Citythin sample	215	88.7%	59 min	0.93%	A+
PDX to DFW · Dallas-Fort Worththin sample	196	72.9%	112 min	5.61%	C−
PDX to SMF · Sacramentothin sample	190	74.1%	53 min	0.53%	C+
PDX to MSP · Minneapolisthin sample	163	87.0%	69 min	0.61%	A+
PDX to SJC · San Josethin sample	157	81.3%	54 min	1.27%	B
PDX to SAN · San Diegothin sample	150	68.2%	29 min	1.33%	C
PDX to ATL · Atlantathin sample	149	83.7%	52 min	0.67%	B+
PDX to OAK · Oaklandthin sample	124	70.2%	56 min	0.00%	C+
PDX to ANC · Anchoragethin sample	120	86.7%	47 min	0.00%	A+
PDX to SNA · Santa Anathin sample	118	99.2%	53 min	0.00%	A+
PDX to IAH · Houstonthin sample	115	84.3%	85 min	0.00%	B+
PDX to EWR · Newarkthin sample	111	87.4%	60 min	0.00%	A+
PDX to GEG · Spokanethin sample	102	89.2%	34 min	0.00%	A+
PDX to BOS · Bostonthin sample	101	79.2%	45 min	0.00%	B+
PDX to BUR · Burbankthin sample	90	92.1%	61 min	1.11%	A
PDX to JFK · New Yorkthin sample	90	84.3%	99 min	0.00%	B+
PDX to PHL · Philadelphiathin sample	87	87.2%	80 min	1.15%	A
PDX to MDW · Chicagothin sample	79	82.1%	45 min	0.00%	B+

Delay causes

What held PDX up in June

One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 76,000 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.

Late-arriving aircraft
44%
Carrier
35%
National Airspace System
20%
Extreme weather
1%
Security
0%

44% 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 76,000 reported delay minutes here, that single category outweighs weather by 43 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 76,427 reported delay minutes.

Cancellations are rare at 0.61%, below the national 1.65% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

5.6% of arrivals land an hour or more late, close to the national 9.7%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

What to do with this

Flying from PDX in June

For a June trip through PDX: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 89.4% on time, and with 5.6% of arrivals an hour or more late, a connection here deserves more slack than the same trip in February would.

Portland International (PDX), the whole year
PDX in July75.7%
PDX in August80.9%
PDX in September83.7%
PDX in October82.1%
PDX in November84.2%
PDX in December79.3%
PDX in January85.6%
PDX in February86.3%
PDX in March86.3%
PDX in April86.1%
PDX in May83.9%

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.

Key figures