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

The distance between SeaTac, WA and Newcastle, WA is 22 km by road.

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

The drive from SeaTac, WA to Newcastle, WA takes approximately 25 min by car.

The fastest route from SeaTac, WA to Newcastle, WA covers 22 km with a driving time of approximately 25 min.

Newcastle, WA lies roughly to the north-east of SeaTac, WA.

Distance: 22 kmDrive time: 25 min

Driving from SeaTac, WA to Newcastle, WA takes about 25 min via I 405. The distance is 22 km. The straight-line distance is 14 km. Driving directions

Driving directions20 · 22 km

1 Depart left 3 m
2 Turn sharp right 91 m
3 Turn left 112 m
4 Turn slightly left 145 m
5 Turn slightly left 646 m
6 Merge slightly right onto Airport Expressway 2 km
7 Keep slightly right 815 m
8 Merge slightly left 2 km
9 Keep slightly left 480 m
10 Continue straight 12 km
11 Take exit slightly right 377 m
12 At roundabout, take exit straight onto Lake Washington Boulevard Northeast 189 m
13 Enter roundabout slightly right onto Lake Washington Boulevard Northeast 31 m

The return trip from Newcastle, WA to SeaTac, WA covers roughly the same distance, 22 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 SeaTac, WA to Newcastle, WA?: The distance between SeaTac, WA and Newcastle, WA is 22 km by road.
How long does it take to drive from SeaTac, WA to Newcastle, WA?: The drive from SeaTac, WA to Newcastle, WA takes approximately 25 min by car.
What is the best route from SeaTac, WA to Newcastle, WA?: The fastest route from SeaTac, WA to Newcastle, WA covers 22 km with a driving time of approximately 25 min.
Which direction is Newcastle, WA from SeaTac, WA?: Newcastle, WA lies roughly to the north-east of SeaTac, WA.