Route on-time record
BOI to PDX: most on-time flights and the best time to fly
Boise (Boise Air Terminal/Gowen Field) to Portland (Portland International Airport). 1,156 nonstop flights in Jun 2025 to May 2026, 91% arrived within 15 minutes and 0.5% were cancelled. The most reliable flight number was Alaska 736 at 5:50 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BOI → PDX
Boise to Portland: 1,156 nonstop flights a year
On time (12 months)
91%
Cancelled
0.5%
avg delay 6 min
Best time to leave
6 to 9 PM
100% on time vs 86% 3 to 6 PM
Most reliable airline
SkyWest
91% chance on time
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 · Alaska 736
5:50 AM → 6:14 AM1h 24m nonstop
Local times, typical schedule. Last flown 2026-05-12.
95%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (21 flights, Jun 2025 to May 2026).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find Alaska 736 fares Opens this date on Aviasales#2 · Alaska 1472
9:00 AM → 9:23 AM1h 23m nonstop
Local times, typical schedule. Last flown 2026-05-31.
95%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (18 flights, Jun 2025 to May 2026).
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find Alaska 1472 fares Opens this date on Aviasales#3 · SkyWest 3104 · sold as United Express, Delta Connection, American Eagle or Alaska
8:20 PM → 8:47 PM1h 27m nonstop
Local times, typical schedule. Last flown 2026-03-16.
95%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (6 to 9 PM: 100% on time; 3 to 6 PM: 86%).
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find 8:20 PM flight fares Opens this date on Aviasales#4 · SkyWest 3274 · sold as United Express, Delta Connection, American Eagle or Alaska
5:50 AM → 6:19 AM1h 29m nonstop
Local times, typical schedule. Last flown 2026-04-21.
95%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 97% 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 5:50 AM flight fares Opens this date on Aviasales#5 · Alaska 782
5:40 AM → 6:11 AM1h 31m nonstop
Local times, typical schedule. Last flown 2026-03-17.
94%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 94% of the time (140 flights, Jun 2025 to May 2026).
- Never cancelled in 140 scheduled flights.
Moderate track record · 140 flights
Find Alaska 782 fares Opens this date on Aviasales#6 · Alaska 229
4:02 PM → 4:30 PM1h 28m nonstop
Local times, typical schedule. Last flown 2026-03-16.
88%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 88% of the time (130 flights, Jun 2025 to May 2026).
- Never cancelled in 130 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 86% on time; 6 to 9 PM: 100%).
Moderate track record · 130 flights
Find Alaska 229 fares Opens this date on Aviasales#7 · SkyWest 3004 · sold as United Express, Delta Connection, American Eagle or Alaska
1:20 PM → 1:50 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-03-17.
87%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 85% of the time (34 flights, Jun 2025 to May 2026).
- Never cancelled in 34 scheduled flights.
- Short track record (34 flights), so its score leans on the airline's record at this hour.
Limited track record · 34 flights
Find 1:20 PM flight fares Opens this date on Aviasales#8 · Alaska 564
4:28 PM → 4:50 PM1h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Alaska 343, 362; its record covers all of them.
87%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 87% of the time (107 flights, Jun 2025 to May 2026).
- Never cancelled in 107 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 86% on time; 6 to 9 PM: 100%).
- 82% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 107 flights
Find Alaska 564 fares Opens this date on Aviasales#9 · SkyWest 3184 · sold as United Express, Delta Connection, American Eagle or Alaska
1:31 PM → 1:50 PM1h 19m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 72%
- Cancelled
- 5.3%
- Avg arrival delay
- 8 min
- Arrived on time 72% of the time (18 flights, Jun 2025 to May 2026).
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find 1:31 PM flight 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)91%
517 flights · 92% on time as flown · 0.9% cancel
- Alaska Airlines91%
639 flights · 91% on time as flown · 0.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
275 flights · avg delay 6 min
- 9 AM to noon94%
237 flights · avg delay 4 min
- Noon to 3 PM89%
273 flights · avg delay 6 min
- 3 to 6 PM86%
330 flights · avg delay 8 min
- 6 to 9 PM100%
41 flights · avg delay 1 min
Best day: Tuesday (94%). Worst: Friday (85%).
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 aircraft60%
- Airline (crew, maintenance, boarding)28%
- Air traffic control and airport volume9%
- Severe weather3%
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
BOI to PDX questions
- What time of day is best to fly BOI to PDX?
- 6 to 9 PM: 100% of flights arrived on time, against 86% for departures 3 to 6 PM.
- Which airline is most on time from BOI to PDX?
- SkyWest, with a season-adjusted 91% chance of operating and arriving on time over 517 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 BOI to PDX?
- December (85% on time); the best was July (94%), 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 BOI
- PDX to BOI (return)
- BOI to SEA 86%
- BOI to DEN 81%
- BOI to PHX 84%
- BOI to SLC 92%
- BOI to SFO 75%
- BOI to LAS 82%
- BOI to LAX 93%
- BOI to ORD 76%
- BOI to SAN 83%
- BOI to SMF 84%
- BOI to DFW 82%
- BOI to MSP 88%
Live status: FAA delays and ground stops