Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at 3,099.7 miles (4,988.5 km). It begins in Seattle, Washington, and travels through the Pacific Northwest, Mountain West, Great Plains, Midwest, and the Northeast, ending in Boston, Massachusetts.

The I-90 is the longest one in the interstate highway system network covering 3,020 miles (4,861 km). This coast-to-coast highway connects Boston on the east with Seattle on the west. It crosses the continental divide at Homestake Pass just east of Butte in the state of Montana.

The I-90 Interstate 90 Highway is a major automotive & trucking transportation corridor and interstate highway that travels generally in a east-west direction across the United States.

Interstate 90 (sometimes called I-90) is a very long Interstate Highway in the United States. It goes 3,021 miles (4,862 km) across the country from Interstate 5 in Seattle to Logan International Airport in Boston and is the longest Interstate Highway.

Use our interactive traffic map to get the latest information about construction and congestion on the roadways. Use it to plan your route and stay ahead of headaches on the asphalt so you can get...

Feb 1, 2024 · The longest of all Interstates, Interstate 90 stretches nearly coast to coast from Seattle, Washington to Boston's Logan International Airport (BOS).

Interstate 90 (I-90) is a United States interstate highway that starts in Seattle, Washington and runs 3,021 mi (4,862 km) east through the states of Washington, Idaho, Montana, Wyoming, South Dakota, Minnesota, Wisconsin, Illinois, Indiana, Ohio, Pennsylvania, New York and Massachusetts in the East Coast in Boston.