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Flight Reliability

AS 334 · Alaska Airlines

Seattle → Atlanta (SEA–ATL)81% of its flights flew this route. The rest (ATL–SEA) are included in these numbers.

81
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
4 min
Average arrival delay
0.8%
Cancelled
6 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

AS 334 departing between 6–9 AM arrived on time 92% of the time, versus 42% between 6–9 PM.

Friday is doing you no favors.

AS 334 arrived on time 82% of the time on Sundays. On Fridays: 70%.

A bit behind the SEA–ATL route.

AS 334 arrived on time 78% of the time, versus 82% across the SEA–ATL route.

Slipping a little lately.

AS 334 arrived on time 87% of the time over the last three months in the data, compared with 90% in the three months before that.

The breakdown

On-time by weekday
  • Mon78%(50 flights)
  • Tue79%(52 flights)
  • Wed81%(52 flights)
  • Thu81%(52 flights)
  • Fri70%(50 flights)
  • Sat73%(52 flights)
  • Sun82%(51 flights)
On-time by departure window
  • 6–9 AM92%(73 flights)
  • 9 AM–12 PM84%(221 flights)
  • 6–9 PM42%(65 flights)
On-time trend by month
90%
May

Jun 47% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202547%30
July 202546%28
August 202563%30
September 202597%30
October 202567%30
November 202580%30
December 202584%31
January 202687%31
February 2026100%28
March 202687%31
April 202683%30
May 202690%30
Departures on time
72%
Diverted
0.5%
Flights flown
359
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.