BOI to PDX flight delays & on-time performance
Nonstop flights from Boise Air Terminal/Gowen Field to Portland International Airport · 344 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BOI or PDX right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Boise (BOI) to Portland (PDX) arrived on time 91% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.6% were cancelled, and 3% arrived an hour or more late.
- SkyWest Airlines was the most punctual airline here (92% on time); Alaska Airlines was the least (91%).
- Departures scheduled around 6am did best (100% on time); around 4pm did worst (86%).
- Tuesday was the most reliable day to fly (96% on time) and Friday the least (87%).
- The largest source of delay minutes was late-arriving aircraft (59%).
Which airline is most on time from BOI to PDX?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 92% | 1.3% | 6 min | 2.6% | 395 |
| Alaska Airlines | 91% | 0.1% | 6 min | 2.8% | 689 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am94%249 flights
- 6am100%67 flights
- 9am95%185 flights
- 12pm90%31 flights
- 1pm88%181 flights
- 4pm86%330 flights
- 7pm100%20 flights
- 8pm100%21 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday95%0.0% cancelled
- Tuesday96%0.7% cancelled
- Wednesday92%0.0% cancelled
- Thursday88%0.6% cancelled
- Friday87%0.6% cancelled
- Saturday92%2.3% cancelled
- Sunday90%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft59%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion8%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Air traffic control & airport congestion67%
- Airline (crew, maintenance, cleaning, fueling)33%
- Extreme weather0%
- Security0%
BOI to PDX: common questions
- How often are BOI to PDX flights on time?
- 91% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Boise to Portland cancelled?
- 0.6% of scheduled flights were cancelled (6 of 1,084).
- How long are typical delays?
- Across all flights the average arrival delay was 6 min (early arrivals count as zero). Flights that were late arrived 60 min behind schedule on average, and 2.7% of flights were an hour or more late.
- How long is taxi time at BOI?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PDX to BOI — 86% on time
More flights from Boise
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BOI → PDX, nonstop flights by US airlines that report to the DOT. How we calculate this.