Is there a bus to Seattle?

Yes, Greyhound offers service, but it is significantly slower than driving or flying.

How far is the drive?

The drive is approximately 800 kilometers and takes about 8.5 hours.

What is the best way to travel?

Flying is the fastest, while driving offers more flexibility for sightseeing.

Are there direct flights?

Yes, Alaska Airlines operates direct flights from Boise to Seattle.

Do I need a car in Seattle?

Not necessarily, as the city has good public transit and walkable neighborhoods.

Caldwell

Seattle

Flight Driving

Caldwell to Seattle

Updated: 29 May 2026

Traveling from Caldwell to Seattle involves crossing the Cascade Range, covering roughly 800 kilometers. You can choose to drive via I-84 and I-90, which takes about 8 to 9 hours, or fly from the nearby Boise Airport. Flying is significantly faster, taking about 1.5 hours in the air. The drive offers spectacular views of the Pacific Northwest landscape. Both options are highly practical depending on your preference for scenery versus speed.

Total Distance: 800 km driving distance, 650 km straight-line air distance.

Fastest Way

Flying from Boise Airport is the fastest way to reach Seattle.

Cheapest Way

Driving is generally cheaper if traveling with multiple passengers.

Compare Caldwell to Seattle Routes

	Flight Direct	Driving Direct
Duration	1 hour 30 mins	8 hours 30 mins
Avg Price	$150-$300	$100-$150 in fuel
Operator	Alaska Airlines	Personal Vehicle
Route	Boise Airport (BOI) to Seattle-Tacoma International Airport (SEA).	I-84 West to I-90 West.
Tip	Book at least three weeks in advance for the best fares.	Expect heavy traffic when entering the Seattle metropolitan area.

Travel Tips

Airport Parking
Use the economy lot at Boise Airport to save on parking fees during your trip.
Traffic Timing
Avoid driving into Seattle during weekday rush hours to save significant time.
Rain Gear
Always carry a waterproof jacket, as Seattle weather is unpredictable throughout the year.
Public Transit
Use the Link Light Rail from the airport to reach downtown Seattle efficiently.
Hotel Location
Stay near the downtown core to be within walking distance of major attractions.

Safety Tips

Mountain Passes
Snoqualmie Pass can be treacherous in winter; carry tire chains if traveling between November and April.
City Awareness
Stay vigilant in crowded tourist areas and keep your belongings secure.
Vehicle Security
Never leave valuables visible in your car when parked in urban areas.
Emergency Services
Know the location of the nearest hospital in case of an emergency.