Route on-time record

SFO to PDX: most on-time flights and the best time to fly

San Francisco (San Francisco International Airport) to Portland (Portland International Airport). 3,526 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 0.3% were cancelled. The most reliable flight number was Alaska 1410 at 7:40 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

SFO → PDX

San Francisco to Portland: 3,526 nonstop flights a year

On time (12 months)

82%

Cancelled

0.3%

avg delay 12 min

Best time to leave

Before 9 AM

92% on time vs 76% 3 to 6 PM

Most reliable airline

United

83% chance on time

Check SFO to PDX fares

Lowest nonstop fare seen in the next two months: $57 (Alaska 1302 on 2026-11-04). 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 1410
7:40 AM → 9:50 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
On time (history)
93%
Cancelled
1.0%
Avg arrival delay
6 min
- Arrived on time 93% of the time (304 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 76%).
- Departs inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
Strong track record · 304 flights
Find Alaska 1410 fares Opens this date on Aviasales
#2 · United 2265
8:22 AM → 10:20 AM1h 58m nonstop
Local times, typical schedule. Last flown 2026-05-30.
89%
chance on time
On time (history)
89%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 89% of the time (9 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 76%).
- Departs inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (9 flights), so its score leans on the airline's record at this hour.
Limited track record · 9 flights
Find United 2265 fares Opens this date on Aviasales
#3 · United 1808
10:17 AM → 12:09 PM1h 52m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 100% of the time (9 flights, Jun 2025 to May 2026).
- Departs inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (9 flights), so its score leans on the airline's record at this hour.
Limited track record · 9 flights
Find United 1808 fares Opens this date on Aviasales
#4 · United 2262
6:56 PM → 8:54 PM1h 58m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 2019; its record covers all of them.
88%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 88% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).
- Short track record (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find United 2262 fares Opens this date on Aviasales
#5 · Alaska 1481
9:00 AM → 10:56 AM1h 56m nonstop
Local times, typical schedule. Last flown 2026-03-17.
86%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
9 min
- Arrived on time 91% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Departs inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Alaska 1481 fares Opens this date on Aviasales
#6 · United 1049
6:49 PM → 8:48 PM1h 59m nonstop
Local times, typical schedule. Last flown 2026-04-27.
84%
chance on time
On time (history)
82%
Cancelled
0.0%
Avg arrival delay
13 min
- Arrived on time 82% of the time (22 flights, Jun 2025 to May 2026).
- Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).
- 66% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (22 flights), so its score leans on the airline's record at this hour.
Limited track record · 22 flights
Find United 1049 fares Opens this date on Aviasales
#7 · SkyWest 5560 · sold as United Express, Delta Connection, American Eagle or Alaska
8:22 AM → 10:24 AM2h 02m nonstop
Local times, typical schedule. Last flown 2026-04-27.
84%
chance on time
On time (history)
70%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 70% of the time (10 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 76%).
- Departs inside SFO's trouble window: 61% of its 333 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find 8:22 AM flight fares Opens this date on Aviasales
#8 · Alaska 525
6:40 PM → 8:32 PM1h 52m nonstop
Local times, typical schedule. Last flown 2026-05-11.
83%
chance on time
On time (history)
84%
Cancelled
0.3%
Avg arrival delay
10 min
- Arrived on time 84% of the time (285 flights, Jun 2025 to May 2026).
- Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).
- 58% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 285 flights
Find Alaska 525 fares Opens this date on Aviasales
#9 · United 1176
9:15 PM → 11:04 PM1h 49m nonstop
Local times, typical schedule. Last flown 2026-03-28.
82%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 88% of the time (24 flights, Jun 2025 to May 2026).
- Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find United 1176 fares Opens this date on Aviasales
#10 · United 2384
10:35 PM → 12:33 AM1h 58m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
On time (history)
72%
Cancelled
0.0%
Avg arrival delay
12 min
- Arrived on time 72% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Departs outside SFO's trouble window (7 AM to 1 PM, when 61% of its 333 ground stops and delay programs started).
- 58% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 32 flights
Find United 2384 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

United Airlines83%
1,642 flights · 83% on time as flown · 0.2% cancel
Alaska Airlines81%
1,383 flights · 82% on time as flown · 0.5% cancel
SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)78%
484 flights · 79% on time as flown · 0.2% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM92%
531 flights · avg delay 5 min
9 AM to noon81%
615 flights · avg delay 12 min
Noon to 3 PM79%
642 flights · avg delay 15 min
3 to 6 PM76%
583 flights · avg delay 14 min
6 to 9 PM82%
668 flights · avg delay 12 min
After 9 PM81%
487 flights · avg delay 12 min

Best day: Tuesday (86%). Worst: Thursday (77%).

Smarter routing

Nearby airports that run more on time

SJC → PDX 85% chance on time
Norman Y. Mineta San Jose International Airport to Portland International Airport · 1,596 flights a year · 30 mi from your airports · yours: 81%
Rank flights Fares

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)32%
Air traffic control and airport volume11%

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

SFO to PDX questions

What time of day is best to fly SFO to PDX?: Before 9 AM: 92% of flights arrived on time, against 76% for departures 3 to 6 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 SFO to PDX?: United, with a season-adjusted 83% chance of operating and arriving on time over 1,642 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 SFO to PDX?: May (74% on time); the best was October (87%), 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.

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