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Route Reliability

SUN → Seattle

SUN–SEA · 475 miles · SUN Airport to Seattle–Tacoma International Airport

80
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
0 min
Average arrival delay
2.3%
Cancelled
431
Flights in the data

Data through May 2026.

Airlines on this route

  • Alaska Airlines83% on time · 393 flights
  • Delta Air Lines89% on time · 38 flights

Too little history on this route to call a winner. We rank airlines only after 100 flights each.

What the data says

The 12–3 PM departure wins.

SUN–SEA flights departing between 12–3 PM arrived on time 92% of the time, versus 79% between 9 AM–12 PM.

Wednesdays have been rough.

SUN–SEA flights arrived on time 93% of the time on Mondays and just 69% on Wednesdays. That gap is worth planning around.

Trending in the right direction.

SUN–SEA flights arrived on time 96% of the time over the last three months in the data, compared with 87% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon93%(55 flights)
  • Tue92%(48 flights)
  • Wed69%(48 flights)
  • Thu81%(63 flights)
  • Fri80%(64 flights)
  • Sat82%(65 flights)
  • Sun87%(76 flights)
On-time by departure window
  • 9 AM–12 PM79%(260 flights)
  • 12–3 PM92%(72 flights)
  • 6–9 PM89%(87 flights)
On-time trend by month
100%
May

Jun 46% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202546%22
July 202563%30
August 202577%31
September 202577%30
October 202582%11
November 202593%15
December 202581%52
January 202690%59
February 202691%58
March 202687%71
April 2026100%23
May 2026100%17

Keep nerding

Based on 431 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.