Straight-Line Distance Between Boston and Seattle

The straight-line distance between Boston, Massachusetts, and Seattle, Washington spans approximately 2,885 miles (4,643 kilometers). This measurement represents the shortest possible direct path between the two cities, often called the "great-circle distance" or "as-the-crow-flies" distance. Actual travel distances will differ significantly depending on the mode of transportation—driving routes typically exceed 3,000 miles due to road networks, while flight paths may vary slightly based on air corridors and weather conditions. The distance can also shift slightly depending on the specific starting and ending points chosen within each metropolitan area.