Historical on-time performance
Salt Lake City to Washington
1,851 miData through Dec 2025Source: US DOT · BTS
Flights on SLC–DCA arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.9%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-time80%Medianon timep9020 minCancel0.9%Flights337
Why flights run late
Delay causes
- Airline27%
- Weather2%
- Air traffic (NAS)60%
- Late aircraft11%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SLC → DCA
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 83% to 84% on time.
- Middays84% on time · p90 20 min · 392 flights
- Mornings83% on time · p90 25 min · 704 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 87% on time.
- Wednesdays87% on time · p90 15 min · 157 flights · limited
- Mondays85% on time · p90 35 min · 157 flights · limited
- Saturdays85% on time · p90 20 min · 156 flights · limited
- Tuesdays82% on time · p90 20 min · 157 flights · limited
- Sundays82% on time · p90 25 min · 157 flights · limited
- Thursdays81% on time · p90 20 min · 156 flights · limited
- Fridays80% on time · p90 20 min · 156 flights · limited
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