Best Time to Fly BWI to PDX: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Portland International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.4% of Baltimore (BWI) to Portland (PDX) flights arrived on time (200 scheduled flights). That is 2.2 points below the national average of 77.6%.
Among 2 airlines, Alaska Airlines led with 83.8% on time and Southwest Airlines was last with 69.8%.
Over 24 months, Sunday was the most reliable day (82% on time) and August the worst month (60%).
The cancellation rate was 0.0% (US average 1.8%).
BWI to PDX on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlines | 83.8% | 76 min | 0.0% | 80 |
| Southwest Airlines | 69.8% | 61 min | 0.0% | 120 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to PDX
On-time arrival % by scheduled departure hour (local time), 309 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | Limited data | 14 | |
| 11am–12pm | Limited data | 26 | |
| 12pm–1pm | 75.0% | 0.0% | 32 |
| 1pm–2pm | 63.4% | 1.2% | 85 |
| 3pm–4pm | Limited data | 10 | |
| 4pm–5pm | 84.0% | 0.0% | 81 |
| 5pm–6pm | Limited data | 14 | |
| 6pm–7pm | Limited data | 8 | |
| 7pm–8pm | Limited data | 20 | |
| 8pm–9pm | Limited data | 19 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI to PDX
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 66.5% | -9.4 pts | 1.2% | 171 |
| All other days | 75.9% | — | 0.0% | 138 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).