Boston (BOS) to Portland (PDX): On-Time Performance
Data through May 2026
When you fly BOS to PDX matters as much as anything else about the booking: the route swung from 96% on-time in January 2025 to just 47% in March 2026. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (91% vs 67%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 1.7
- last 12 months
- Duration
- 6h 17m
- scheduled
- Distance
- 2,537 mi
Best airline from BOS to PDX
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlinesmost reliable | 79% | 12 min | 1.1% | 1,027 |
| JetBlue Airways | 63% | 27 min | 0.7% | 285 |
Monthly on-time trend
Best time to fly from BOS to PDX
Aim for departures around 10 a.m. (93% on-time); avoid 6 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 14 min |
| Tuesday | 77% | 15 min |
| Wednesdaybest | 84% | 10 min |
| Thursday | 70% | 21 min |
| Friday | 70% | 18 min |
| Saturday | 81% | 11 min |
| Sunday | 73% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations26%
- National airspace system25%
- Weather2%
Frequently asked questions
- How often are flights from BOS to PDX delayed?
- 25% of BOS–PDX flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from BOS to PDX?
- Alaska Airlines has the best on-time record on this route at 79%, based on 1,027 flights. 2 airlines flew BOS–PDX frequently enough to compare in this period.
- What is the best time of day to fly from BOS to PDX?
- Departures around 10 a.m. have the best record (93% on-time), while departures around 6 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOS to PDX?
- The scheduled BOS–PDX flight time averages 6h 17m over 2,537 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are BOS to PDX flights cancelled?
- 1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from BOS to PDX?
- March 2026 was the roughest month in this dataset, with only 47% of arrivals on time. The best was January 2025 at 96%. If your dates are flexible, that 49-point gap is worth planning around.
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Based on 1,312 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.