Airport reliability
Portland (PDX) on-time performance
How reliably flights leave Portland, OR (PDX) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.
Portland, OR63,784 departures in 12 months
- Departures on time
- 81.7% U.S. average 75.6%
- Cancelled
- 0.7% U.S. average 1.9%
- 60+ minutes late
- 4.4% U.S. average 8.1%
- Scheduled departures
- 63,784 12 months
What this means
PDX departures beat the U.S. average.
- 81.7% of the 63,784 scheduled departures from Portland (PDX) arrived at their destination on time, 6.1 points higher than the U.S. average of 75.6%.
- 0.7% of departures were cancelled (U.S. average 1.9%), and 4.4% arrived an hour or more late.
- Flights arriving at PDX were on time 79.9% of the time.
- Among airlines with at least 300 departures, Delta Air Lines was the most punctual from PDX (88.9%) and Allegiant Air the least (71.1%).
- Over the last 3 years, November was the most reliable month for departures from PDX (85.7% on time) and July the least reliable (76.1%).
- Cancellations peaked in January, when 3.8% of flights were cancelled.
- Flights scheduled to depart before 6 am were the most punctual (93.9% on time); flights scheduled to depart 8 pm to 9 pm were the least (71.9%).
Airlines at PDX
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Departures |
|---|---|---|---|---|---|
| Delta Air Lines | 88.9% | 1.1% | 2.9% | 74 min | 7,151 |
| SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska | 84.7% | 0.5% | 4.7% | 64 min | 10,587 |
| Alaska Airlines | 82.2% | 0.7% | 3.2% | 46 min | 24,677 |
| United Airlines | 79.9% | 0.6% | 6.2% | 65 min | 6,624 |
| American Airlines | 79.4% | 1.8% | 7.3% | 111 min | 4,484 |
| Frontier Airlines | 78.2% | 1.3% | 7.6% | 78 min | 799 |
| Southwest Airlines | 75.2% | 0.3% | 5.2% | 48 min | 8,585 |
| Allegiant Air | 71.1% | 0.3% | 9.2% | 119 min | 360 |
| JetBlue Airways | 60.2% | 5.6% | 14.3% | 99 min | 161 |
| Hawaiian Airlines | 53.6% | 1.7% | 9.6% | 79 min | 291 |
| Envoy AirSold as American Eagle | Insufficient sample | 36 | |||
| Spirit Airlines | Insufficient sample | 29 | |||
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On-time rate by departure hour
Share of scheduled flights on time PDX average 81.7%
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | 93.9% | 3,553 |
| Departing 6 am to 7 am | 92.0% | 2,933 |
| Departing 7 am to 8 am | 83.5% | 10,028 |
| Departing 8 am to 9 am | 86.6% | 1,941 |
| Departing 9 am to 10 am | 84.9% | 1,718 |
| Departing 10 am to 11 am | 80.3% | 8,619 |
| Departing 11 am to noon | 79.6% | 2,975 |
| Departing noon to 1 pm | 82.2% | 1,971 |
| Departing 1 pm to 2 pm | 77.1% | 2,987 |
| Departing 2 pm to 3 pm | 80.7% | 6,815 |
| Departing 3 pm to 4 pm | 76.0% | 1,881 |
| Departing 4 pm to 5 pm | 74.6% | 875 |
| Departing 5 pm to 6 pm | 78.3% | 6,915 |
| Departing 6 pm to 7 pm | 73.5% | 1,217 |
| Departing 7 pm to 8 pm | 75.3% | 1,784 |
| Departing 8 pm to 9 pm | 71.9% | 871 |
| Departing 9 pm to 10 pm | 81.5% | 3,380 |
| Departing 10 pm to 11 pm | 82.9% | 1,472 |
| Departing 11 pm to midnight | 81.3% | 1,849 |
Best and worst months at PDX
Share of scheduled flights on time 12-month average 81.7%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 79.9% | 13,213 |
| February | 84.5% | 12,182 |
| March | 84.6% | 14,544 |
| April | 84.7% | 14,568 |
| May | 82.5% | 15,850 |
| June | 78.6% | 16,932 |
| July | 76.1% | 17,660 |
| August | 79.5% | 17,414 |
| September | 84.9% | 15,426 |
| October | 85.4% | 15,948 |
| November | 85.7% | 14,664 |
| December | 81.9% | 14,952 |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 83.4% | 5,269 |
| Oct 2025 | 81.4% | 5,493 |
| Nov 2025 | 82.8% | 4,976 |
| Dec 2025 | 78.6% | 5,124 |
| Jan 2026 | 84.2% | 4,537 |
| Feb 2026 | 85.5% | 4,182 |
| Mar 2026 | 85.3% | 5,113 |
| Apr 2026 | 85.5% | 5,040 |
| May 2026 | 83.3% | 5,535 |
| Jun 2026 | 79.5% | 6,024 |
| Jul 2026 | 76.9% | 6,304 |
| Aug 2026 | 77.2% | 6,187 |
Busiest routes from PDX
| To | On time | Cancelled | Airlines | Flights |
|---|---|---|---|---|
| Seattle (SEA) | 84.3% | 0.7% | 3 | 4,927 |
| Los Angeles (LAX) | 86.1% | 0.6% | 4 | 4,287 |
| Denver (DEN) | 81.5% | 0.4% | 5 | 4,280 |
| Phoenix (PHX) | 78.8% | 0.5% | 6 | 3,768 |
| San Francisco (SFO) | 66.5% | 0.4% | 3 | 3,495 |
| Las Vegas (LAS) | 79.3% | 0.5% | 4 | 2,934 |
| Chicago (ORD) | 77.9% | 1.0% | 3 | 2,814 |
| Salt Lake City (SLC) | 88.0% | 1.1% | 4 | 2,383 |
| Dallas/Fort Worth (DFW) | 80.1% | 2.3% | 2 | 2,327 |
| Sacramento (SMF) | 82.0% | 0.3% | 3 | 1,962 |
| San Diego (SAN) | 73.7% | 0.7% | 3 | 1,833 |
| San Jose (SJC) | 81.4% | 0.4% | 3 | 1,702 |
| Minneapolis (MSP) | 90.6% | 0.6% | 2 | 1,577 |
| Atlanta (ATL) | 87.0% | 0.9% | 3 | 1,544 |
| Santa Ana (SNA) | 90.0% | 1.0% | 1 | 1,543 |
| Oakland (OAK) | 76.6% | 0.8% | 3 | 1,319 |
| Anchorage (ANC) | 83.3% | 0.0% | 1 | 1,239 |
| Houston (IAH) | 86.0% | 0.5% | 2 | 1,208 |
| Spokane (GEG) | 84.0% | 0.8% | 2 | 1,069 |
| Burbank (BUR) | 85.6% | 0.8% | 3 | 1,001 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Scheduled nonstop domestic departures from Portland, OR (PDX) by airlines that report to the DOT.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.