Route on-time record
PDX to BOI: most on-time flights and the best time to fly
Portland (Portland International Airport) to Boise (Boise Air Terminal/Gowen Field). 919 nonstop flights in Jun 2025 to May 2026, 87% arrived within 15 minutes and 0.8% were cancelled. The most reliable flight number was SkyWest 3003 at 10:55 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
PDX → BOI
Portland to Boise: 919 nonstop flights a year
On time (12 months)
87%
Cancelled
0.8%
avg delay 8 min
Best time to leave
9 AM to noon
90% on time vs 84% 3 to 6 PM
Most reliable airline
SkyWest
88% chance on time
Lowest nonstop fare seen in the next two months: $273 (Alaska 342 on 2026-10-30). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · SkyWest 3003 · sold as United Express, Delta Connection, American Eagle or Alaska
10:55 AM → 1:17 PM1h 22m nonstop
Local times, typical schedule. Last flown 2026-03-17.
90%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 91% of the time (34 flights, Jun 2025 to May 2026).
- Never cancelled in 34 scheduled flights.
- Leaves in this route's most on-time window (9 AM to noon: 90% on time; 3 to 6 PM: 84%).
- 98% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 34 flights
Find 10:55 AM flight fares Opens this date on Aviasales#2 · SkyWest 3275 · sold as United Express, Delta Connection, American Eagle or Alaska
9:40 PM → 11:58 PM1h 18m nonstop
Local times, typical schedule. Last flown 2026-04-21.
88%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 91% of the time (35 flights, Jun 2025 to May 2026).
- Never cancelled in 35 scheduled flights.
- Short track record (35 flights), so its score leans on the airline's record at this hour.
Limited track record · 35 flights
Find 9:40 PM flight fares Opens this date on Aviasales#3 · Alaska 342
2:49 PM → 5:13 PM1h 24m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Alaska 612; its record covers all of them.
87%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 88% of the time (184 flights, Jun 2025 to May 2026).
- Never cancelled in 184 scheduled flights.
Moderate track record · 184 flights
Find Alaska 342 fares Opens this date on Aviasales#4 · SkyWest 3185 · sold as United Express, Delta Connection, American Eagle or Alaska
10:30 AM → 12:51 PM1h 21m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 78%
- Cancelled
- 5.3%
- Avg arrival delay
- 10 min
- Arrived on time 78% of the time (18 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 90% on time; 3 to 6 PM: 84%).
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find 10:30 AM flight fares Opens this date on Aviasales#5 · Alaska 447
9:40 PM → 11:59 PM1h 19m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 83%
- Cancelled
- 0.6%
- Avg arrival delay
- 8 min
- Arrived on time 83% of the time (162 flights, Jun 2025 to May 2026).
Moderate track record · 162 flights
Find Alaska 447 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)88%
279 flights · 90% on time as flown · 1.4% cancel
- Alaska Airlines85%
640 flights · 86% on time as flown · 0.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 9 AM to noon90%
278 flights · avg delay 7 min
- Noon to 3 PM86%
326 flights · avg delay 8 min
- 3 to 6 PM84%
38 flights · avg delay 15 min
- After 9 PM85%
277 flights · avg delay 7 min
Best day: Tuesday (90%). Worst: Sunday (82%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft56%
- Airline (crew, maintenance, boarding)28%
- Air traffic control and airport volume16%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
PDX to BOI questions
- What time of day is best to fly PDX to BOI?
- 9 AM to noon: 90% of flights arrived on time, against 84% for departures 3 to 6 PM.
- Which airline is most on time from PDX to BOI?
- SkyWest, with a season-adjusted 88% chance of operating and arriving on time over 279 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on PDX to BOI?
- January (81% on time); the best was April (91%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from PDX
- BOI to PDX (return)
- PDX to SEA 84%
- PDX to LAX 87%
- PDX to DEN 80%
- PDX to PHX 80%
- PDX to SFO 75%
- PDX to LAS 81%
- PDX to ORD 77%
- PDX to DFW 80%
- PDX to SLC 88%
- PDX to SMF 83%
- PDX to SAN 80%
- PDX to SJC 82%
Live status: FAA delays and ground stops