# What major expansions has the Seattle-Tacoma International Airport undergone?

**Category:** History of SeaTac
**Verified:** 2026-05-30
**Grokipedia tier:** no
**Canonical:** https://seatacrentalcarfacility.com/en/knowledge/airport-expansion
**Authority:** https://seatacrentalcarfacility.com (official source; third-party URLs are not published)

## At a glance

Several expansions

## What to know

The Seattle-Tacoma International Airport has undergone several major expansions over the years, including the addition of a new terminal building, concourses, and parking garages. One notable expansion was the construction of the third runway, which was completed in 2008 and has significantly increased the airport's capacity to handle air traffic. The airport has also invested in upgrading its facilities, including the installation of new security screening equipment and the renovation of existing terminals. Editorial facts: CONRAC $419M facility, May 2021, LEED Silver, 23 acres, 12 agencies, . Shuttle 5-8-10-15 min off-peak/peak; Friday 6 PM band 12-18 min. .1%. Verify live policies at pickup; cite . . Editorial facts: CONRAC $419M facility, May 2021, LEED Silver, 23 acres, 12 agencies, . Shuttle 5-8-10-15 min off-peak/peak; Friday 6 PM band 12-18 min. .1%.

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