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Route · BOI → PDX · 2020–2025 BTS data

Boise to Portland

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BOI to PDX (Boise to Portland) ranks #2154 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

89.1%
On-time
+10.1 pts
vs US avg
67 min
Delay when late
5,804
Flights
#2154 of 4927
Corpus placement

Cancelled

0.6%

Best Month

Jun 2024 98%

Worst Month

Feb 2025 79%

Distance

344 mi

Carriers

8

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 105 16 0 0 AS,OO
Nov 2025 108 10 4 0 OO,AS
Oct 2025 119 4 1 0 AS,OO
Sep 2025 120 6 0 0 OO,AS
Aug 2025 102 10 0 0 OO,AS
Jul 2025 89 6 0 0 AS,OO
Jun 2025 98 14 0 0 AS,OO
May 2025 96 5 0 0 AS,OO
Apr 2025 81 4 0 0 OO
Mar 2025 100 19 0 0 OO
Feb 2025 98 21 3 0 OO
Jan 2025 103 14 0 0 OO
Dec 2024 102 18 1 0 OO
Nov 2024 97 9 1 0 OO
Oct 2024 84 8 0 0 OO
Sep 2024 144 19 0 0 OO
Aug 2024 111 10 0 0 OO
Jul 2024 88 8 0 0 OO
Jun 2024 101 2 1 0 OO
May 2024 113 9 0 0 OO
Apr 2024 75 8 0 0 OO
Mar 2024 51 7 0 0 OO
Feb 2024 38 5 0 0 OO
Jan 2024 36 11 3 0 OO

BOI–PDX seasonal on-time pattern

Best: July (93.3%) · weakest: December (81.0%)

80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 81%

Strongest calendar month

July

93.3% on-time · ~99 flights/mo

Busiest calendar month

September

~110 flights/mo avg

Weakest calendar month

December

81.0% on-time · ~83 flights/mo

Cancellation Rate

0.6%

14 of 2,259 flights

Diversion Rate

0.0%

0 of 2,259 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

BOI - Boise

Full on-time, delay-cause, and seasonal performance for Boise, ID.

BOI on-time profile

PDX - Portland

Full on-time, delay-cause, and seasonal performance for Portland, OR.

PDX on-time profile

Compare the two airports

See BOI and PDX side by side on delays, cancellations, and reliability.

Compare BOI vs PDX

Origin-hub reliability standing

Among BOI's stronger departures

BOI → PDX posts a 89.1% on-time rate, landing in the ≥85% band with 10 of 19 BTS-tracked routes leaving Boise. The same hub also shows 9 mid-band and 0 challenged departures · fleet-wide on-time rank #232 of 4927 (highest on-time = #1).

What the Data Says About BOI to PDX

Boise to Portland (BOI to PDX) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 89.1% on-time rate across 5,804 flights, with delays that do happen averaging 67.2 minutes. The corridor runs roughly 344 miles and is served by 8 carriers. Over the most recent 24 months, 14 of 2,259 flights were cancelled (0.6%) and 0 diverted (0.0%).

The monthly split is wide on this route: Jun 2024 posted the strongest performance at 98% on-time, while Feb 2025 came in at just 79% - a 19-point swing worth factoring into travel timing.

On the multi-year calendar, BOI–PDX peaks in July at 93.3% on-time while September carries the heaviest traffic (~110 flights per month) ; the softest month is December at 81.0%, a 12.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does BOI to PDX rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, BOI to PDX ranks #2154 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from BOI to PDX? ▼
Flights from Boise to Portland have a 89.1% on-time rate based on 5,804 flights. The average delay is 67.2 minutes. The best recent month was Jun 2024 with 98% on-time.
What is the cancellation rate for BOI to PDX? ▼
Over the last 24 months, 0.6% of flights on this route were cancelled (14 of 2,259 flights) and 0.0% were diverted.
How far is the flight from BOI to PDX? ▼
The flight distance from Boise (BOI) to Portland (PDX) is approximately 344 miles. This route is served by 8 carriers.
When is the best time to fly from BOI to PDX? ▼
The best recent month for on-time performance was Jun 2024 (98% on-time). The worst was Feb 2025 (79% on-time). Consider booking during months with historically better performance.

Airports on this route

BOI Airport

Boise
PDX Airport

Portland
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 BOI–PDX data

BOI–PDX runs 10.1 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare BOI and PDX airport profiles: delay causes and top routes differ even on the same corridor. BOI airport
  • If your dates flex, July (93.3% on-time) beats December (81.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 89.1% 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.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

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.