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Flight Reliability

DL 2830 · Delta Air Lines

Seattle → Los Angeles (SEA–LAX)96% of its flights flew this route. The rest (SEA–PDX) are included in these numbers.

91
Nerd Approved
WanderNerd Reliability Score
86%
Arrive within 15 minutes
0 min
Average arrival delay
0.8%
Cancelled
7 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 2830 departing between 3–6 PM arrived on time 94% of the time, versus 85% between 12–3 PM.

Sunday scaries are real for this one.

DL 2830 arrived on time 96% of the time on Tuesdays and just 77% on Sundays. That gap is worth planning around.

A bit ahead of the Delta Air Lines network.

DL 2830 arrived on time 86% of the time, versus 81% across the Delta Air Lines network.

Slipping a little lately.

DL 2830 arrived on time 83% of the time over the last three months in the data, compared with 86% in the three months before that.

The breakdown

On-time by weekday
  • Mon92%(52 flights)
  • Tue96%(51 flights)
  • Wed89%(52 flights)
  • Thu81%(52 flights)
  • Fri82%(51 flights)
  • Sat87%(52 flights)
  • Sun77%(52 flights)
On-time by departure window
  • 12–3 PM85%(294 flights)
  • 3–6 PM94%(52 flights)
  • 6–9 PM88%(16 flights)
On-time trend by month
87%
May

Jun 77% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202597%31
August 202587%31
September 202593%30
October 202584%31
November 202586%29
December 202594%31
January 202687%31
February 202679%28
March 202677%30
April 202687%30
May 202687%30
Departures on time
85%
Diverted
0%
Flights flown
362
Months covered
12

Same route, other flights

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.