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Flight Reliability

DL 2949 · Delta Air Lines

Seattle → Las Vegas (SEA–LAS)

87
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
2 min
Average arrival delay
0.3%
Cancelled
8 min early
Median arrival delay

Based on 359 historical flights. Data through May 2026.

What the data says

Skip Thursday if you can.

DL 2949 arrived on time 87% of the time on Tuesdays. On Thursdays: 75%.

A bit ahead of the SEA–LAS route.

DL 2949 arrived on time 82% of the time, versus 77% across the SEA–LAS route.

It basically never cancels.

Out of 359 scheduled flights, only 0.3% were cancelled.

The breakdown

On-time by weekday
  • Mon81%(52 flights)
  • Tue87%(52 flights)
  • Wed82%(50 flights)
  • Thu75%(48 flights)
  • Fri82%(51 flights)
  • Sat81%(52 flights)
  • Sun83%(52 flights)
On-time by departure window
  • 3–6 PM80%(44 flights)
  • 6–9 PM82%(313 flights)
On-time trend by month
70%
May

Jun 83% → May 70% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%29
July 202574%31
August 202594%31
September 202580%30
October 202581%31
November 202583%29
December 202593%28
January 202693%30
February 202654%28
March 202687%30
April 202687%30
May 202670%30
Departures on time
85%
Diverted
0.3%
Flights flown
357
Months covered
12

Same route, other flights

Keep nerding

Based on 359 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.