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Route Reliability

Seattle → Miami

SEA–MIA · 2,724 miles · Seattle–Tacoma International Airport to Miami International Airport

80
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
2 min
Average arrival delay
1.0%
Cancelled
1,149
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines79%365 flights
  2. 2.Alaska Airlines78%391 flights
  3. 3.American Airlines76%393 flights

What the data says

Morning-you made the right choice.

SEA–MIA flights departing between 6–9 AM arrived on time 79% of the time, versus 68% between 12–3 PM.

Friday is doing you no favors.

SEA–MIA flights arrived on time 84% of the time on Wednesdays and just 69% on Fridays. That gap is worth planning around.

Delta Air Lines has a slight edge here.

Delta Air Lines arrived on time 79% of the time on this route; American Airlines managed 76%.

Slipping a little lately.

SEA–MIA flights arrived on time 76% of the time over the last three months in the data, compared with 79% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon76%(159 flights)
  • Tue83%(159 flights)
  • Wed84%(158 flights)
  • Thu82%(163 flights)
  • Fri69%(162 flights)
  • Sat74%(165 flights)
  • Sun78%(166 flights)
On-time by departure window
  • 12–3 AM—(3 flights)
  • 6–9 AM79%(716 flights)
  • 9 AM–12 PM—(2 flights)
  • 12–3 PM68%(28 flights)
  • 6–9 PM78%(160 flights)
  • 9 PM–12 AM76%(223 flights)
On-time trend by month
80%
May

Jun 77% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%90
July 202571%90
August 202566%92
September 202582%89
October 202591%92
November 202581%95
December 202577%119
January 202678%98
February 202682%83
March 202671%91
April 202675%89
May 202680%104

Same trip, other airports

Keep nerding

Based on 1,149 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.