Route · PDX → BOS · 2020–2025 BTS data
Portland to Boston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PDX to BOS (Portland to Boston) ranks #3615 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 74.1%
- On-time
- -4.9 pts
- vs US avg
- 78 min
- Delay when late
- 2,333
- Flights
- #3615 of 4927
- Corpus placement
Cancelled
0.4%
Best Month
Oct 2024 89%
Worst Month
May 2025 56%
Distance
2,537 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 39 | 8 | 0 | 0 | AS |
| Nov 2025 | 38 | 4 | 0 | 1 | AS |
| Oct 2025 | 48 | 16 | 1 | 0 | AS |
| Sep 2025 | 49 | 13 | 0 | 0 | AS,B6 |
| Aug 2025 | 88 | 20 | 0 | 0 | AS,B6 |
| Jul 2025 | 92 | 28 | 1 | 0 | AS,B6 |
| Jun 2025 | 90 | 18 | 0 | 0 | AS,B6 |
| May 2025 | 80 | 35 | 0 | 0 | AS,B6 |
| Apr 2025 | 31 | 1 | 0 | 0 | AS,B6 |
| Dec 2024 | 45 | 5 | 0 | 0 | AS |
| Nov 2024 | 36 | 4 | 0 | 0 | AS |
| Oct 2024 | 72 | 8 | 0 | 0 | AS,B6 |
| Sep 2024 | 78 | 23 | 1 | 0 | AS,B6 |
| Aug 2024 | 87 | 29 | 0 | 1 | AS,B6 |
| Jul 2024 | 93 | 38 | 0 | 0 | AS,B6 |
| Jun 2024 | 88 | 15 | 2 | 0 | AS,B6 |
| May 2024 | 77 | 19 | 0 | 0 | AS,B6 |
| Apr 2024 | 30 | 9 | 0 | 0 | AS |
| Dec 2023 | 31 | 6 | 0 | 0 | AS |
| Nov 2023 | 30 | 3 | 0 | 0 | AS |
| Oct 2023 | 59 | 11 | 0 | 1 | AS,B6 |
| Sep 2023 | 63 | 27 | 1 | 0 | AS,B6 |
| Aug 2023 | 84 | 26 | 0 | 0 | AS,B6 |
| Jul 2023 | 84 | 22 | 0 | 2 | AS,B6 |
PDX–BOS seasonal on-time pattern
Best: March (95.5%) · weakest: May (68.0%)
Strongest calendar month
March
95.5% on-time · ~44 flights/mo
Busiest calendar month
July
~77 flights/mo avg
Weakest calendar month
May
68.0% on-time · ~60 flights/mo
Cancellation Rate
0.4%
6 of 1,512 flights
Diversion Rate
0.3%
5 of 1,512 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PDX - Portland
Full on-time, delay-cause, and seasonal performance for Portland, OR.
PDX on-time profileBOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
BOS on-time profileCompare the two airports
See PDX and BOS side by side on delays, cancellations, and reliability.
Compare PDX vs BOSOrigin-hub reliability standing
Softer reliability from PDX
Among 44 routes leaving PDX, only 1 (including this one) clear below 75% on-time, while 26 stay ≥85% and 17 sit mid-band. Travelers comparing PDX options should weigh this 74.1% print against those peers · fleet on-time rank #4596 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to PDX–BOS.
Routes with a similar on-time rate
What the Data Says About PDX to BOS
On-time performance on the PDX to BOS pairing (Portland to Boston) trails a chunk of the network: 74.1% of 2,333 tracked flights arrived on schedule, with a 78.1-minute average delay on the ones that ran late. The route spans about 2,537 miles across 3 carriers. Cancellations over the trailing 24 months hit 0.4% (6 of 1,512 flights), with 0.3% diverted.
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 89% on-time, while May 2025 came in at just 56% - a 33-point swing worth factoring into travel timing.
On the multi-year calendar, PDX–BOS peaks in March at 95.5% on-time while July carries the heaviest traffic (~77 flights per month) ; the softest month is May at 68.0%, a 27.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PDX to BOS rank among US routes by traffic? ▼
How often are flights delayed from PDX to BOS? ▼
What is the cancellation rate for PDX to BOS? ▼
How far is the flight from PDX to BOS? ▼
When is the best time to fly from PDX to BOS? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using PDX–BOS data
PDX–BOS sits 4.9 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare PDX and BOS airport profiles: delay causes and top routes differ even on the same corridor. PDX airport
- If your dates flex, March (95.5% on-time) beats May (68.0%) on this corridor. Seasonal chart
- 4 other routes post a similar 74.1% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.