BUT, there are more, perhaps, less controlled borders to Denmark, they follow below,
and also warnings against the more controlled border crossings.
DONT TRAVEL THROUGH:
Copenhagen Airport or Billund Airport
The land border crossing at PADBORG, KRUSÅ, in other
words AVOID any land border crossings in Jylland!
TRAVEL BETTER THROUGH THESE CROSSINGS
RED ROUTE ONE;
Travel to Rostock in Germany (old DDR), best by train/bus/car, then
jump on the ferry (SCANDLINES) to GEDSER port in Denmark, less
heavy controlled, at the moment.
Then jump on the train/bus to Copenhagen, takes two hours.
RED ROUTE TWO;
Travel to Helsingborg in Sweden, best by train/bus/car, then
jump on the ferry (SCANDLINES or HH-ferries) to HELSINGØR port in Denmark,
less heavy controlled, at the moment.
Then jump on the train to Copenhagen, takes one hour.
Or take the local train to Hillerød (half an hour) and then the S-train
to Copenhagen, 40 mint. travel time.
RED ROUTE THREE;
Travel to Oslo in Norway, take the ferry direct to Copenhagen (DFDS).
RED ROUTE FOUR;
Travel to Bornholm, then by ferry to Køge, then S-train to Copenhagen (half hour).