Introduction. Sinus headaches cause a dull, deep, throbbing pain in the front of your head and face. They are caused by an inflammation in your sinuses, air-filled cavities around your nose, eyes, and cheeks. Bending down or leaning over usually makes the pain worse, as does cold and damp weather. Sinus headaches often begin first thing in the morning, and may be better by afternoon. Sinus headaches can be difficult to diagnose, however, because symptoms are similar to tension headaches and migraines.
The total distance from Boston, MA to Seattle, WA is 2,492 miles. This is equivalent to 4 011 kilometers or 2,166 nautical miles. Your trip begins in Boston, Massachusetts. It ends in Seattle, Washington. Your flight direction from Boston, MA to Seattle, WA is Northwest (-64 degrees from North). The distance calculator helps you figure out how far it is to fly from Boston, MA to Seattle, WA. It does this by computing the straight line flying distance (as the crow flies).
The driving distance from Washington, District of Columbia to Seattle, Washington is:  2,762 miles / 4,445 km     The flight time from Washington, District of Columbâ¦ia to Seattle, Washington is:  4 hours, 39 minutes     The flight distance from Washington, District of Columbia to Seattle, Washington is:  2,328 miles / 3,746 km.