Great-circle flight route mapper. Enter a gcmap-style route, e.g. LAX-NRT-SIN, and/or a range ring, e.g. LAX+1500km. Use / to branch to multiple destinations, e.g. LAX-HKG/SYD. Just want to mark an airport with no route or range? Enter its code alone, e.g. LAX. Need more than one route or range on the same map? Paste a whole list into the boxes below the map — one per line, or comma-separated.