Route Reliability
Portland → Salt Lake City
PDX–SLC · 630 miles · Portland International Airport to Salt Lake City International Airport
- 89%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 0.8%
- Cancelled
- 2,574
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines91%1,699 flights
- 2.Alaska Airlines87%823 flights
Not enough history to rank: Frontier Airlines (52 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning-you made the right choice.
PDX–SLC flights departing between 3–6 AM arrived on time 98% of the time, versus 84% between 6–9 PM.
Tuesday has been the better bet.
A small edge: 92% on time on Tuesdays against 87% on Thursdays.
Delta Air Lines has a slight edge here.
Delta Air Lines arrived on time 91% of the time on this route; Alaska Airlines managed 87%.
Ticking up lately.
PDX–SLC flights arrived on time 93% of the time over the last three months in the data, compared with 89% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon87%(395 flights)
- Tue92%(356 flights)
- Wed91%(350 flights)
- Thu87%(366 flights)
- Fri88%(394 flights)
- Sat88%(319 flights)
- Sun87%(372 flights)
- 3–6 AM98%(364 flights)
- 6–9 AM86%(309 flights)
- 9 AM–12 PM90%(520 flights)
- 12–3 PM90%(513 flights)
- 3–6 PM85%(535 flights)
- 6–9 PM84%(311 flights)
Jun 87% → May 92% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 87% | 231 |
| July 2025 | 80% | 247 |
| August 2025 | 86% | 242 |
| September 2025 | 90% | 232 |
| October 2025 | 90% | 221 |
| November 2025 | 89% | 198 |
| December 2025 | 87% | 199 |
| January 2026 | 88% | 175 |
| February 2026 | 93% | 169 |
| March 2026 | 93% | 204 |
| April 2026 | 94% | 213 |
| May 2026 | 92% | 221 |
Keep nerding
Based on 2,574 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.