A Tale of Two Experiences in June
Seattle-Tacoma’s (SeaTac) TSA security wait times for June 2026 presented a story of sharp contrasts. While the overall monthly average held steady at just 7 minutes, unchanged from May 2026, this figure conceals the reality faced by some travelers. One line peaked at an extraordinary 125 minutes, highlighting how averages alone don’t tell the whole story. Despite this, the vast majority of passengers, 96% in fact, passed through security in under 15 minutes.
Looking at the airport’s core operating hours between 5 am and 9 pm, the average wait was slightly higher at 8 minutes. On a typical day, travelers could expect peak lines to reach around 35 minutes. The busiest single day of the month was 15 June, when the average wait climbed to 11 minutes across the airport.
Checkpoint Performance: A Crucial Choice
Your choice of security checkpoint made a significant difference in June. The extreme 125-minute wait was recorded at Checkpoint 3, which also saw a daily average of 8 minutes. Checkpoint 6 was another to watch, with the highest average wait of 10 minutes and its own peak of 50 minutes.
In stark contrast, several checkpoints offered a much faster experience. The most efficient checkpoints included:
- Checkpoint 6 General (5 min average, 5 min peak)
- Checkpoint 5 General (5 min average, 15 min peak)
- Checkpoint 1 (5 min average, 20 min peak)
- Checkpoint 5 (5 min average, 20 min peak)
These figures demonstrate that travellers using the faster checkpoints were unlikely to experience any significant delays throughout the entire month.
Picking the Best Time to Fly
Timing your departure was another key factor for a smooth journey. The data shows that Mondays were the busiest day of the week, with an average wait of 8 minutes. The daily rush hour for security was consistently at 10 am, when queues averaged 10 minutes. Conversely, Fridays were the quietest day of the week, with waits averaging just 6 minutes.
Throughout the day, the quietest period was in the very early hours around 12 am, when waits dropped to 5 minutes. Lines began to build from 3 am, hitting their stride by 6 am and remaining elevated until after the 10 am peak.
For travelers planning a trip through Seattle-Tacoma, the data offers a clear path. To minimize time spent in the TSA line, aim to travel on a Friday and try to avoid the busy 10 am morning period. Where possible, heading to Checkpoints 1, 5, or 6 General offered the best chance of a swift transit.