Route on-time record
PDX to OAK: most on-time flights and the best time to fly
Portland (Portland International Airport) to Oakland (Oakland San Francisco Bay Airport). 1,272 nonstop flights in Jun 2025 to May 2026, 77% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was Southwest 839 at 5:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
PDX → OAK
Portland to Oakland: 1,272 nonstop flights a year
On time (12 months)
77%
Cancelled
0.7%
avg delay 13 min
Best time to leave
Before 9 AM
96% on time vs 50% after 9 PM
Most reliable airline
SkyWest
81% chance on time
Lowest nonstop fare seen in the next two months: $83 (Southwest 644 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 · Southwest 839
5:00 AM → 6:45 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-04-06.
93%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (27 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 50%).
- Short track record (27 flights), so its score leans on the airline's record at this hour.
Limited track record · 27 flights
Find Southwest 839 fares Opens this date on Aviasales#2 · Southwest 3573
6:00 AM → 7:45 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-29.
90%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 97% of the time (39 flights, Jun 2025 to May 2026).
- Never cancelled in 39 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 50%).
- Short track record (39 flights), so its score leans on the airline's record at this hour.
Limited track record · 39 flights
Find Southwest 3573 fares Opens this date on Aviasales#3 · Southwest 360
5:10 AM → 6:55 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 50%).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 360 fares Opens this date on Aviasales#4 · SkyWest 3067 · sold as United Express, Delta Connection, American Eagle or Alaska
5:39 PM → 7:33 PM1h 54m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 95% of the time (19 flights, Jun 2025 to May 2026).
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find 5:39 PM flight fares Opens this date on Aviasales#5 · Southwest 1536
7:00 AM → 8:45 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-30.
84%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 50%).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 1536 fares Opens this date on Aviasales#6 · SkyWest 3057 · sold as United Express, Delta Connection, American Eagle or Alaska
2:30 PM → 4:23 PM1h 53m nonstop
Local times, typical schedule. Last flown 2026-03-16.
82%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 89% of the time (19 flights, Jun 2025 to May 2026).
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find 2:30 PM flight fares Opens this date on Aviasales#7 · Southwest 4093
11:50 AM → 1:35 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-04-06.
77%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 78% of the time (27 flights, Jun 2025 to May 2026).
- Short track record (27 flights), so its score leans on the airline's record at this hour.
Limited track record · 27 flights
Find Southwest 4093 fares Opens this date on Aviasales#8 · Southwest 2888
10:45 AM → 12:30 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-29.
73%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 70% of the time (23 flights, Jun 2025 to May 2026).
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 2888 fares Opens this date on Aviasales#9 · Southwest 3579
1:10 PM → 2:55 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-27.
70%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 63% of the time (16 flights, Jun 2025 to May 2026).
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 3579 fares Opens this date on Aviasales#10 · Southwest 298
6:05 PM → 7:50 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-30.
68%
chance on time
- On time (history)
- 66%
- Cancelled
- 0.0%
- Avg arrival delay
- 20 min
- Arrived on time 66% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- 69% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (47 flights), so its score leans on the airline's record at this hour.
Limited track record · 47 flights
Find Southwest 298 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)81%
52 flights · 88% on time as flown · 0.5% cancel
- Southwest Airlines76%
1,204 flights · 76% on time as flown · 0.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
330 flights · avg delay 2 min
- 9 AM to noon82%
325 flights · avg delay 10 min
- Noon to 3 PM70%
81 flights · avg delay 14 min
- 3 to 6 PM66%
264 flights · avg delay 20 min
- 6 to 9 PM66%
154 flights · avg delay 20 min
- After 9 PM50%
118 flights · avg delay 30 min
Best day: Saturday (88%). Worst: Sunday (80%).
Smarter routing
Nearby airports that run more on time
PDX → SJC 81% chance on time
Portland International Airport to Norman Y. Mineta San Jose International Airport · 1,611 flights a year · 29 mi from your airports · yours: 76%
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 aircraft70%
- Airline (crew, maintenance, boarding)26%
- Air traffic control and airport volume5%
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 OAK questions
- What time of day is best to fly PDX to OAK?
- Before 9 AM: 96% of flights arrived on time, against 50% for departures after 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 PDX to OAK?
- SkyWest, with a season-adjusted 81% chance of operating and arriving on time over 52 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 OAK?
- July (74% on time); the best was January (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
- OAK 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