Portland (PDX) to Salt Lake City (SLC): On-Time Performance
Data through July 2026
The calendar drives reliability on PDX–SLC. November 2024 flights landed on schedule 95% of the time, but July 2025 dropped to 79% — a gap of 16 points. Across the full period the route averages 89% on-time against a national 78%.
- On-time
- 89%
- arrived <15 min late
- Avg delay
- 8 min
- completed flights
- Cancelled
- 0.8%
- Flights/day
- 6.5
- last 12 months
- Duration
- 1h 53m
- scheduled
- Distance
- 630 mi
Best airline from PDX to SLC
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 91% | 7 min | 1.0% | 3,532 |
| SkyWest Airlines | 85% | 10 min | 0.3% | 1,384 |
| Frontier Airlines | 70% | 21 min | 2.0% | 152 |
Monthly on-time trend
Best time to fly from PDX to SLC
Aim for departures around 5 a.m. (97% on-time); avoid 3 p.m. departures (71%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 88% | 7 min |
| Tuesdaybest | 92% | 6 min |
| Wednesdaybest | 92% | 5 min |
| Thursday | 88% | 8 min |
| Friday | 88% | 9 min |
| Saturday | 88% | 10 min |
| Sunday | 86% | 10 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft55%
- Airline operations33%
- National airspace system8%
- Weather3%
Frequently asked questions
- How often are flights from PDX to SLC delayed?
- 11% of PDX–SLC flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 8 minutes.
- Which airline is most reliable from PDX to SLC?
- Delta Air Lines has the best on-time record on this route at 91%, based on 3,532 flights. 3 airlines flew PDX–SLC frequently enough to compare in this period.
- What is the best time of day to fly from PDX to SLC?
- Departures around 5 a.m. have the best record (97% on-time), while departures around 3 p.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PDX to SLC?
- The scheduled PDX–SLC flight time averages 1h 53m over 630 miles. Actual arrival times vary — flights on this route land 15+ minutes late 11% of the time.
- How often are PDX to SLC flights cancelled?
- 0.8% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from PDX to SLC?
- July 2025 was the roughest month in this dataset, with only 79% of arrivals on time. The best was November 2024 at 95%. If your dates are flexible, that 16-point gap is worth planning around.
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Based on 5,115 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.