Historical on-time performance
Washington to Salt Lake City
1,851 miData through May 2026Source: US DOT · BTS
Flights on DCA–SLC arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 337 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time72%Medianon timep9050 minCancel0.6%Flights337
Why flights run late
Delay causes
- Airline24%
- Weather0%
- Air traffic (NAS)29%
- Late aircraft46%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline50%
- Weather50%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 2 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 DCA → SLC
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 81% on time.
- Thursdays81% on time · p90 30 min · 157 flights · limited
- Saturdays81% on time · p90 35 min · 157 flights · limited
- Mondays81% on time · p90 45 min · 156 flights · limited
- Sundays80% on time · p90 25 min · 157 flights · limited
- Fridays79% on time · p90 30 min · 157 flights · limited
- Tuesdays78% on time · p90 35 min · 156 flights · limited
- Wednesdays75% on time · p90 50 min · 156 flights · limited
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