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Flight Reliability

AS 543 · Alaska Airlines

Dallas–Fort Worth → Seattle (DFW–SEA)

79
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
5 min
Average arrival delay
1.6%
Cancelled
6 min early
Median arrival delay

Based on 307 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

AS 543 departing between 6–9 AM arrived on time 88% of the time, versus 70% between 12–3 PM.

Sunday scaries are real for this one.

AS 543 arrived on time 89% of the time on Wednesdays and just 73% on Sundays. That gap is worth planning around.

A bit ahead of the DFW–SEA route.

AS 543 arrived on time 77% of the time, versus 70% across the DFW–SEA route.

A bit behind the Alaska Airlines network.

AS 543 arrived on time 77% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon76%(45 flights)
  • Tue77%(44 flights)
  • Wed89%(44 flights)
  • Thu73%(44 flights)
  • Fri80%(44 flights)
  • Sat73%(41 flights)
  • Sun73%(40 flights)
On-time by departure window
  • 6–9 AM88%(32 flights)
  • 9 AM–12 PM80%(158 flights)
  • 12–3 PM70%(112 flights)
On-time trend by month
100%
May

Jun 47% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202547%30
July 202583%29
August 202565%31
September 202580%30
October 202587%31
November 202573%30
December 202573%26
January 202683%29
February 202686%28
March 202682%17
May 2026100%12
Departures on time
83%
Diverted
0%
Flights flown
302
Months covered
12

Same route, other flights

Keep nerding

Based on 307 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.