How far is it from Newcastle, WA to SeaTac, WA?

The distance between Newcastle, WA and SeaTac, WA is 21 km by road.

How long does it take to drive from Newcastle, WA to SeaTac, WA?

The drive from Newcastle, WA to SeaTac, WA takes approximately 30 min by car.

The fastest route from Newcastle, WA to SeaTac, WA covers 21 km with a driving time of approximately 30 min.

SeaTac, WA lies roughly to the south-west of Newcastle, WA.

Distance: 21 kmDrive time: 30 min

Driving from Newcastle, WA to SeaTac, WA takes about 30 min via I 405. The distance is 21 km. The straight-line distance is 14 km. Driving directions

Driving directions23 · 21 km

The return trip from SeaTac, WA to Newcastle, WA covers roughly the same distance, 21 km.

No notable attractions were found along this route.

Distance and drive time are computed from OpenStreetMap road data with the OSRM routing engine. Updated 5 October 2026.

How far is it from Newcastle, WA to SeaTac, WA?: The distance between Newcastle, WA and SeaTac, WA is 21 km by road.
How long does it take to drive from Newcastle, WA to SeaTac, WA?: The drive from Newcastle, WA to SeaTac, WA takes approximately 30 min by car.
What is the best route from Newcastle, WA to SeaTac, WA?: The fastest route from Newcastle, WA to SeaTac, WA covers 21 km with a driving time of approximately 30 min.
Which direction is SeaTac, WA from Newcastle, WA?: SeaTac, WA lies roughly to the south-west of Newcastle, WA.