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Flight Reliability

DL 481 · Delta Air Lines

Atlanta → Seattle (ATL–SEA)87% of its flights flew this route. The rest (SNA–SEA, DFW–MSP) are included in these numbers.

90
Nerd Approved
WanderNerd Reliability Score
82%
Arrive within 15 minutes
4 min
Average arrival delay
0%
Cancelled
5 min early
Median arrival delay

Based on 356 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

DL 481 departing between 12–3 PM arrived on time 88% of the time, versus 72% between 6–9 PM.

Friday is doing you no favors.

DL 481 arrived on time 87% of the time on Saturdays. On Fridays: 75%.

A bit ahead of the ATL–SEA route.

DL 481 arrived on time 82% of the time, versus 78% across the ATL–SEA route.

It basically never cancels.

Out of 356 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon85%(52 flights)
  • Tue75%(52 flights)
  • Wed87%(52 flights)
  • Thu78%(51 flights)
  • Fri75%(52 flights)
  • Sat87%(45 flights)
  • Sun85%(52 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM88%(170 flights)
  • 3–6 PM77%(138 flights)
  • 6–9 PM72%(47 flights)
On-time trend by month
90%
May

Jun 93% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202587%31
August 202568%28
September 202581%26
October 202577%30
November 202590%29
December 202561%31
January 202690%31
February 202686%28
March 202658%31
April 202697%30
May 202690%31
Departures on time
85%
Diverted
0%
Flights flown
356
Months covered
12

Same route, other flights

Keep nerding

Based on 356 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.