Skip to content
WanderNerd
Check a flight

Route Reliability

Seattle → SUN

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

90
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
2 min early
Average arrival delay
0.9%
Cancelled
431
Flights in the data

Data through May 2026.

Airlines on this route

  • Alaska Airlines91% on time · 393 flights
  • Delta Air Lines87% 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

Mornings have a slight edge.

Departures between 6–9 AM arrived on time 91% of the time, against 87% between 9 AM–12 PM.

Monday is the weak spot.

SEA–SUN flights arrived on time 95% of the time on Saturdays. On Mondays: 86%.

Flights on this route

The breakdown

On-time by weekday
  • Mon86%(55 flights)
  • Tue90%(48 flights)
  • Wed88%(48 flights)
  • Thu87%(63 flights)
  • Fri90%(67 flights)
  • Sat95%(65 flights)
  • Sun95%(76 flights)
On-time by departure window
  • 6–9 AM91%(296 flights)
  • 9 AM–12 PM87%(38 flights)
  • 3–6 PM89%(88 flights)
On-time trend by month
88%
May

Jun 96% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202596%22
July 202597%30
August 202597%31
September 202597%30
October 2025100%10
November 202593%15
December 202585%54
January 202690%59
February 202688%59
March 202685%72
April 202691%23
May 202688%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.