Yellowknife wins on raw statistics: its dry, continental interior climate gives it among the highest clear-night rates of any aurora hub, sitting almost directly beneath the auroral oval at 68.7°N magnetic latitude. But "best" depends on what you're optimizing for. Abisko holds Europe's strongest clear-sky record thanks to a rain-shadow microclimate locals call the Blue Hole, tearing a window through cloud cover that blankets the rest of the continent. Tromsø trades a few percentage points of clear-sky odds for the deepest aurora-tour infrastructure anywhere, hundreds of operators running boat trips, mountain-station stays, and dog-sledding chases for travelers who'd rather book a guide than gamble on a rental car in the Arctic dark.
This ranking weighs three things: statistical aurora frequency and clear-sky odds, geomagnetic latitude relative to the auroral oval (65°+ magnetic latitude sees 150+ aurora nights a year), and how easy each place actually is to reach from an international airport. December and January bring the longest, darkest nights across the whole aurora oval, worth checking against where to go stargazing in December or January if you're building a trip around the calendar rather than a single destination. For month-by-month odds and moon-phase timing across the full season, see the aurora season guide. If you're completely new to aurora chasing, start with how to see the northern lights for the fundamentals before picking a destination from the ranking below.