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Flight Reliability

AS 344 · Alaska Airlines

Seattle → Baltimore (SEA–BWI)90% of its flights flew this route. The rest (EWR–SFO, PDX–BOI) are included in these numbers.

88
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
0 min
Average arrival delay
0.4%
Cancelled
5 min early
Median arrival delay

Based on 241 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 6–9 AM arrived on time 86% of the time, against 82% between 9 PM–12 AM.

Sunday scaries are real for this one.

AS 344 arrived on time 88% of the time on Wednesdays and just 68% on Sundays. That gap is worth planning around.

Recent months have been rougher.

AS 344 arrived on time 79% of the time over the last three months in the data, compared with 91% in the three months before that.

The breakdown

On-time by weekday
  • Mon84%(37 flights)
  • Tue84%(32 flights)
  • Wed88%(33 flights)
  • Thu77%(35 flights)
  • Fri86%(36 flights)
  • Sat86%(29 flights)
  • Sun68%(38 flights)
On-time by departure window
  • 6–9 AM86%(21 flights)
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM—(1 flights)
  • 9 PM–12 AM82%(217 flights)
On-time trend by month
74%
May

Jun 80% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%30
July 202573%30
August 202581%31
September 202587%30
October 202596%23
November 202590%20
December 202583%29
April 202680%10
May 202674%31
Departures on time
78%
Diverted
0%
Flights flown
240
Months covered
11

Same route, other flights

Keep nerding

Based on 241 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.