Route on-time record
SAN to PDX: most on-time flights and the best time to fly
San Diego (San Diego International Airport) to Portland (Portland International Airport). 1,790 nonstop flights in Jun 2025 to May 2026, 85% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was Alaska 399 at 7:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SAN → PDX
San Diego to Portland: 1,790 nonstop flights a year
On time (12 months)
85%
Cancelled
0.9%
avg delay 9 min
Best time to leave
Before 9 AM
95% on time vs 78% 6 to 9 PM
Most reliable airline
Alaska
85% chance on time
Lowest nonstop fare seen in the next two months: $110 (Southwest 921 on 2026-10-21). 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 399
7:00 AM → 9:49 AM2h 49m nonstop
Local times, typical schedule. Last flown 2026-05-31.
94%
chance on time
- On time (history)
- 96%
- Cancelled
- 1.7%
- Avg arrival delay
- 3 min
- Arrived on time 96% of the time (172 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 95% on time; 6 to 9 PM: 78%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Moderate track record · 172 flights
Find Alaska 399 fares Opens this date on Aviasales#2 · Alaska 576
10:47 AM → 1:37 PM2h 49m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 89%
- Cancelled
- 1.7%
- Avg arrival delay
- 7 min
- Arrived on time 89% of the time (176 flights, Jun 2025 to May 2026).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Moderate track record · 176 flights
Find Alaska 576 fares Opens this date on Aviasales#3 · Alaska 1402
2:04 PM → 4:49 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.5%
- Avg arrival delay
- 7 min
- Arrived on time 88% of the time (211 flights, Jun 2025 to May 2026).
- Departs outside SAN's trouble window (6 AM to noon, when 66% of its 164 ground stops and delay programs started).
Strong track record · 211 flights
Find Alaska 1402 fares Opens this date on Aviasales#4 · SkyWest 3305 · sold as United Express, Delta Connection, American Eagle or Alaska
10:47 AM → 1:38 PM2h 51m nonstop
Local times, typical schedule. Last flown 2026-03-17.
85%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 89% of the time (28 flights, Jun 2025 to May 2026).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- 80% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find 10:47 AM flight fares Opens this date on Aviasales#5 · Alaska 1392
6:02 PM → 8:49 PM2h 47m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.5%
- Avg arrival delay
- 9 min
- Arrived on time 84% of the time (211 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 78% on time; Before 9 AM: 95%).
- Departs outside SAN's trouble window (6 AM to noon, when 66% of its 164 ground stops and delay programs started).
Strong track record · 211 flights
Find Alaska 1392 fares Opens this date on Aviasales#6 · Alaska 729
9:07 PM → 11:59 PM2h 52m nonstop
Local times, typical schedule. Last flown 2026-04-20. Same departure also flew as Alaska 542; its record covers all of them.
81%
chance on time
- On time (history)
- 81%
- Cancelled
- 2.2%
- Avg arrival delay
- 13 min
- Arrived on time 81% of the time (221 flights, Jun 2025 to May 2026).
- Departs outside SAN's trouble window (6 AM to noon, when 66% of its 164 ground stops and delay programs started).
- 52% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 221 flights
Find Alaska 729 fares Opens this date on Aviasales#7 · Southwest 4627
11:05 AM → 1:45 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
74%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 82% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 4627 fares Opens this date on Aviasales#8 · Southwest 1994
2:50 PM → 5:25 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
66%
chance on time
- On time (history)
- 65%
- Cancelled
- 0.0%
- Avg arrival delay
- 14 min
- Arrived on time 65% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs outside SAN's trouble window (6 AM to noon, when 66% of its 164 ground stops and delay programs started).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 1994 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Alaska Airlines85%
1,635 flights · 86% on time as flown · 1.0% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)83%
40 flights · 83% on time as flown · 0.7% cancel
- Southwest Airlines74%
115 flights · 71% on time as flown · 0.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM95%
325 flights · avg delay 5 min
- 9 AM to noon87%
402 flights · avg delay 7 min
- Noon to 3 PM83%
389 flights · avg delay 9 min
- 3 to 6 PM83%
69 flights · avg delay 9 min
- 6 to 9 PM78%
495 flights · avg delay 13 min
- After 9 PM87%
110 flights · avg delay 7 min
Best day: Tuesday (92%). Worst: Sunday (79%).
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 aircraft59%
- Airline (crew, maintenance, boarding)27%
- Air traffic control and airport volume11%
- Severe weather2%
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
SAN to PDX questions
- What time of day is best to fly SAN to PDX?
- Before 9 AM: 95% of flights arrived on time, against 78% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from SAN to PDX?
- Alaska, with a season-adjusted 85% chance of operating and arriving on time over 1,635 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 SAN to PDX?
- June (80% on time); the best was February (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 SAN
- PDX to SAN (return)
- SAN to SFO 68%
- SAN to LAS 76%
- SAN to DEN 79%
- SAN to PHX 76%
- SAN to SMF 77%
- SAN to SJC 78%
- SAN to SEA 81%
- SAN to ORD 78%
- SAN to DFW 77%
- SAN to OAK 75%
- SAN to SLC 84%
- SAN to AUS 74%
Live status: FAA delays and ground stops