SFO to PDX flight delays & on-time performance
Nonstop flights from San Francisco International Airport to Portland International Airport · 550 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SFO or PDX right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Francisco (SFO) to Portland (PDX) arrived on time 80% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.3% were cancelled, and 6% arrived an hour or more late.
- United Airlines was the most punctual airline here (81% on time); SkyWest Airlines was the least (78%).
- Departures scheduled around 7am did best (95% on time); around 3pm did worst (71%).
- Saturday was the most reliable day to fly (87% on time) and Thursday the least (73%).
- The largest source of delay minutes was late-arriving aircraft (60%).
Which airline is most on time from SFO to PDX?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 81% | 0.2% | 13 min | 6.6% | 1,716 |
| Frontier Airlines | 80% | 16.7% | 6 min | 0.0% | 6 |
| Alaska Airlines | 79% | 0.5% | 12 min | 5.5% | 1,379 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 78% | 0.3% | 13 min | 4.9% | 392 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am95%259 flights
- 8am89%261 flights
- 9am88%81 flights
- 10am79%287 flights
- 11am71%248 flights
- 12pm75%342 flights
- 1pm82%44 flights
- 2pm78%227 flights
- 3pm71%235 flights
- 4pm76%234 flights
- 5pm76%59 flights
- 6pm81%441 flights
- 7pm86%132 flights
- 8pm72%135 flights
- 9pm77%171 flights
- 10pm81%336 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday80%0.4% cancelled
- Tuesday85%0.2% cancelled
- Wednesday79%0.0% cancelled
- Thursday73%0.6% cancelled
- Friday78%0.8% cancelled
- Saturday87%0.0% cancelled
- Sunday78%0.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft60%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion10%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)58%
- Air traffic control & airport congestion42%
- Extreme weather0%
- Security0%
SFO to PDX: common questions
- How often are SFO to PDX flights on time?
- 80% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Francisco to Portland cancelled?
- 0.3% of scheduled flights were cancelled (12 of 3,493).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 59 min behind schedule on average, and 6.0% of flights were an hour or more late.
- How long is taxi time at SFO?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PDX to SFO — 69% on time
More flights from San Francisco
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SFO → PDX, nonstop flights by US airlines that report to the DOT. How we calculate this.