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Route · PDX → BOI · 2020–2025 BTS data

Portland to Boise

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PDX to BOI (Portland to Boise) ranks #2344 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

87.3%
On-time
+8.3 pts
vs US avg
64 min
Delay when late
5,377
Flights
#2344 of 4927
Corpus placement

Cancelled

0.5%

Best Month

Apr 2025 94%

Worst Month

Aug 2024 76%

Distance

344 mi

Carriers

8

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 75 14 0 0 AS,OO
Nov 2025 79 11 5 0 OO,AS
Oct 2025 89 12 1 0 AS,OO
Sep 2025 90 11 0 0 OO,AS
Aug 2025 71 7 0 0 OO,AS
Jul 2025 58 8 0 0 AS,OO
Jun 2025 68 10 0 0 AS,OO
May 2025 78 6 0 0 AS,OO
Apr 2025 81 5 0 0 OO
Mar 2025 100 17 0 0 OO
Feb 2025 98 15 2 0 OO
Jan 2025 103 21 0 0 OO
Dec 2024 102 19 1 0 OO
Nov 2024 97 15 0 0 OO
Oct 2024 85 12 0 0 OO
Sep 2024 144 26 0 0 OO
Aug 2024 111 27 0 0 OO
Jul 2024 88 13 0 0 OO
Jun 2024 101 15 0 0 OO
May 2024 113 14 0 0 OO
Apr 2024 75 10 0 0 OO
Mar 2024 51 8 0 0 OO
Feb 2024 38 6 0 0 OO
Jan 2024 34 12 1 0 OO

PDX–BOI seasonal on-time pattern

Best: April (90.6%) · weakest: December (79.9%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 79.9%

Strongest calendar month

April

90.6% on-time · ~81 flights/mo

Busiest calendar month

September

~99 flights/mo avg

Weakest calendar month

December

79.9% on-time · ~88 flights/mo

Cancellation Rate

0.5%

10 of 2,029 flights

Diversion Rate

0.0%

0 of 2,029 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 profile

BOI - Boise

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

BOI on-time profile

Compare the two airports

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

Compare PDX vs BOI

Origin-hub reliability standing

Among PDX's stronger departures

PDX → BOI posts a 87.3% on-time rate, landing in the ≥85% band with 26 of 44 BTS-tracked routes leaving Portland. The same hub also shows 17 mid-band and 1 challenged departures · fleet-wide on-time rank #572 of 4927 (highest on-time = #1).

What the Data Says About PDX to BOI

Portland to Boise (PDX to BOI) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.3% on-time rate across 5,377 flights, with delays that do happen averaging 63.7 minutes. The corridor runs roughly 344 miles and is served by 8 carriers. Over the most recent 24 months, 10 of 2,029 flights were cancelled (0.5%) and 0 diverted (0.0%).

The monthly split is wide on this route: Apr 2025 posted the strongest performance at 94% on-time, while Aug 2024 came in at just 76% - a 18-point swing worth factoring into travel timing.

On the multi-year calendar, PDX–BOI peaks in April at 90.6% on-time while September carries the heaviest traffic (~99 flights per month) ; the softest month is December at 79.9%, a 10.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does PDX to BOI rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, PDX to BOI ranks #2344 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 PDX to BOI? ▼
Flights from Portland to Boise have a 87.3% on-time rate based on 5,377 flights. The average delay is 63.7 minutes. The best recent month was Apr 2025 with 94% on-time.
What is the cancellation rate for PDX to BOI? ▼
Over the last 24 months, 0.5% of flights on this route were cancelled (10 of 2,029 flights) and 0.0% were diverted.
How far is the flight from PDX to BOI? ▼
The flight distance from Portland (PDX) to Boise (BOI) is approximately 344 miles. This route is served by 8 carriers.
When is the best time to fly from PDX to BOI? ▼
The best recent month for on-time performance was Apr 2025 (94% on-time). The worst was Aug 2024 (76% on-time). Consider booking during months with historically better performance.

Airports on this route

PDX Airport

Portland
BOI Airport

Boise
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–BOI data

PDX–BOI runs 8.3 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare PDX and BOI airport profiles: delay causes and top routes differ even on the same corridor. PDX airport
  • If your dates flex, April (90.6% on-time) beats December (79.9%) on this corridor. Seasonal chart
  • 4 other routes post a similar 87.3% 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.