Washington is 51% more expensive than Anchorage.
When comparing Washington, DC and Anchorage, AK, the overall cost of living indices are 171 and 113 respectively (national median = 100). Rent is $447/month cheaper in Anchorage, saving renters about $5,364/year.
Median household income is $8,135/year higher in Washington. Home values also differ significantly — the median in Washington is $724,600 compared to $375,900 in Anchorage.
Alaska has no state income tax, giving Anchorage residents a significant tax advantage over District of Columbia's 10.75% rate.
Washington vs Anchorage — common questions
Other cost of living comparisons for Washington and Anchorage