Just found out that one can cycle to airport in St. Louis.

I forgot to mention here:

Here in downtown Vancouver, we have 2 smallish companies that fly seaplanes to Vancouver Island and the Gulf Islands several times per day. The capital of British Columbia is Victoria which is located on Vancouver Island.

So there are a few bike racks right at their ticket/take-off office locations in Vancouver. Yes, people on business do fly between the 2 areas (it's only about half hr. and terrific views of ocean, Gulf Islands, etc.) and one can bike to and from the offices.

The landing/take-off areas are beside the Seaside/Seawill bike/pedestrian path and overlook the harbour/mountains.

It is actually a spectacular way to combine multi-modal --cycle-fly with an ocean, mountains and islands view directly from downtown.

No, these planes do not fly into the U.S.