Historical on-time performance
Portland to Salt Lake City
630 miData through May 2026Source: US DOT · BTS
Flights on PDX–SLC arrive on time 88% of the time over the last 12 months.
On-time rate88%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 2,271 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time89%Medianon timep9010 minCancel1.1%Flights1,698
- SkyWest AirlinesOn-time84%Medianon timep9020 minCancel0.2%Flights573
Why flights run late
Delay causes
- Airline37%
- Weather2%
- Air traffic (NAS)7%
- Late aircraft54%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline95%
- Weather0%
- Air traffic (NAS)5%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 19 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly PDX → SLC
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 92% on time.
- Mornings92% on time · p90 10 min · 1,973 flights
- Middays90% on time · p90 10 min · 2,327 flights
- Evenings85% on time · p90 25 min · 2,592 flights
- Afternoons76% on time · p90 65 min · 137 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 85% to 91% on time.
- Tuesdays91% on time · p90 10 min · 989 flights
- Wednesdays91% on time · p90 10 min · 973 flights
- Saturdays89% on time · p90 10 min · 894 flights
- Mondays89% on time · p90 15 min · 1,071 flights
- Thursdays88% on time · p90 15 min · 1,057 flights
- Fridays87% on time · p90 20 min · 1,074 flights
- Sundays85% on time · p90 25 min · 1,065 flights
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