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Route Reliability

Salt Lake City → Washington

SLC–DCA · 1,851 miles · Salt Lake City International Airport to Ronald Reagan Washington National Airport

81
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
3 min early
Average arrival delay
1.1%
Cancelled
365
Flights in the data

Data through May 2026.

Delta Air Lines is the only airline in this data on this route, arriving on time 86% of the time across 365 flights. No comparison to make.

What the data says

Skip Thursday if you can.

SLC–DCA flights arrived on time 94% of the time on Sundays. On Thursdays: 80%.

Ticking up lately.

SLC–DCA flights arrived on time 88% of the time over the last three months in the data, compared with 81% in the three months before that.

The breakdown

On-time by weekday
  • Mon81%(52 flights)
  • Tue86%(50 flights)
  • Wed81%(52 flights)
  • Thu80%(50 flights)
  • Fri86%(51 flights)
  • Sat94%(47 flights)
  • Sun94%(51 flights)
On-time trend by month
94%
May

Jun 79% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%28
July 202592%25
August 202584%31
September 202590%29
October 202590%31
November 202587%30
December 202594%31
January 202670%30
February 202681%26
March 202684%31
April 202687%30
May 202694%31

Same trip, other airports

Keep nerding

Based on 365 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.