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Flight Reliability

AS 379 · Alaska Airlines

Baltimore → Seattle (BWI–SEA)95% of its flights flew this route. The rest (SEA–BWI) are included in these numbers.

68
Usually Fine
WanderNerd Reliability Score
64%
Arrive within 15 minutes
11 min
Average arrival delay
0.6%
Cancelled
5 min
Median arrival delay

Based on 355 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

AS 379 departing between 9 AM–12 PM arrived on time 84% of the time, versus 63% between 6–9 PM.

Wednesdays have been rough.

AS 379 arrived on time 72% of the time on Saturdays and just 56% on Wednesdays. That gap is worth planning around.

A bit behind the BWI–SEA route.

AS 379 arrived on time 64% of the time, versus 70% across the BWI–SEA route.

Well behind the Alaska Airlines network.

AS 379 arrived on time 64% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon62%(53 flights)
  • Tue71%(48 flights)
  • Wed56%(50 flights)
  • Thu59%(54 flights)
  • Fri62%(53 flights)
  • Sat72%(43 flights)
  • Sun69%(51 flights)
On-time by departure window
  • 9 AM–12 PM84%(19 flights)
  • 6–9 PM63%(333 flights)
On-time trend by month
75%
May

Jun 40% → May 75% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202540%30
July 202541%29
August 202577%31
September 202587%30
October 202583%24
November 202575%20
December 202539%26
January 202676%29
February 202674%27
March 202639%31
April 202664%28
May 202675%47
Departures on time
75%
Diverted
0.3%
Flights flown
352
Months covered
12

Same route, other flights

Keep nerding

Based on 355 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.