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Flight Reliability

AS 600 · Alaska Airlines

Seattle → Las Vegas (SEA–LAS)97% of its flights flew this route. The rest (SJC–SEA, LAS–LAX) are included in these numbers.

80
Pretty Reliable
WanderNerd Reliability Score
74%
Arrive within 15 minutes
6 min
Average arrival delay
0.4%
Cancelled
2 min early
Median arrival delay

Based on 245 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

AS 600 departing between 12–3 PM arrived on time 83% of the time, versus 52% between 3–6 PM.

Friday is doing you no favors.

AS 600 arrived on time 86% of the time on Tuesdays and just 64% on Fridays. That gap is worth planning around.

A bit behind the SEA–LAS route.

AS 600 arrived on time 74% of the time, versus 77% across the SEA–LAS route.

A bit behind the Alaska Airlines network.

AS 600 arrived on time 74% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon66%(35 flights)
  • Tue86%(35 flights)
  • Wed76%(33 flights)
  • Thu78%(36 flights)
  • Fri64%(36 flights)
  • Sat70%(33 flights)
  • Sun78%(36 flights)
On-time by departure window
  • 6–9 AM—(3 flights)
  • 12–3 PM83%(169 flights)
  • 3–6 PM52%(68 flights)
  • 6–9 PM—(3 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
87%
May

Jun 50% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%18
July 202561%31
August 202550%30
September 202569%29
October 202576%25
February 202694%17
March 202689%28
April 202690%30
May 202687%31
Departures on time
74%
Diverted
0%
Flights flown
244
Months covered
11

Same route, other flights

Keep nerding

Based on 245 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.