Historical on-time performance
Raleigh-durham to Salt Lake City
1,823 miData through Dec 2025Source: US DOT · BTS
Flights on RDU–SLC arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 405 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time82%Medianon timep9030 minCancel0.5%Flights405
Why flights run late
Delay causes
- Airline38%
- Weather9%
- Air traffic (NAS)12%
- Late aircraft41%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly RDU → SLC
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 77% to 84% on time.
- Evenings84% on time · p90 25 min · 1,069 flights
- Mornings77% on time · p90 45 min · 132 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 88% on time.
- Tuesdays88% on time · p90 15 min · 178 flights · limited
- Thursdays84% on time · p90 20 min · 171 flights · limited
- Wednesdays84% on time · p90 20 min · 168 flights · limited
- Sundays84% on time · p90 35 min · 177 flights · limited
- Mondays83% on time · p90 20 min · 178 flights · limited
- Fridays82% on time · p90 40 min · 173 flights · limited
- Saturdays79% on time · p90 55 min · 178 flights · limited
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