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Route Reliability

Atlanta → Seattle

ATL–SEA · 2,182 miles · Hartsfield–Jackson Atlanta International Airport to Seattle–Tacoma International Airport

82
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
5 min
Average arrival delay
0.7%
Cancelled
3,281
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 Lines80%2,375 flights
  2. 2.Alaska Airlines73%906 flights

What the data says

Morning-you made the right choice.

ATL–SEA flights departing between 6–9 AM arrived on time 85% of the time, versus 65% between 6–9 PM.

Saturday has been the better bet.

A small edge: 81% on time on Saturdays against 74% on Fridays.

Delta Air Lines runs this route best.

Delta Air Lines arrived on time 80% of the time on this route; Alaska Airlines managed 73%.

Trending in the right direction.

ATL–SEA flights arrived on time 79% of the time over the last three months in the data, compared with 71% 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%(479 flights)
  • Tue77%(446 flights)
  • Wed80%(443 flights)
  • Thu80%(475 flights)
  • Fri74%(471 flights)
  • Sat81%(443 flights)
  • Sun77%(490 flights)
On-time by departure window
  • 6–9 AM85%(696 flights)
  • 9 AM–12 PM80%(865 flights)
  • 12–3 PM84%(393 flights)
  • 3–6 PM75%(377 flights)
  • 6–9 PM65%(669 flights)
  • 9 PM–12 AM80%(247 flights)
On-time trend by month
78%
May

Jun 72% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%323
July 202578%341
August 202577%314
September 202589%283
October 202582%291
November 202585%255
December 202562%265
January 202674%211
February 202677%191
March 202670%226
April 202688%251
May 202678%296

Keep nerding

Based on 3,281 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.