I don't know if there's anything "special" per se (and more power to you if you want to walk to airports), but I can think of a couple of reasons why they do behave differently:

• Airports require substantially more land than bus or railway stations -- especially compared to some large central city railway stations where basically everything but the main concourse is underground, airports require large amounts of land on the surface, which often has the effect of blocking off the walkable parts of airports (the terminals) from other parts of the city. The noise and pollution can also make it unpleasant to walk.
• The average air traveler (on average! not the "HBO only" flyertalk crowd) has more luggage than the average bus or rail traveler, especially compared a lot of rail and bus travel doesn't permit checked luggage, so people often get naturally limited to what they can carry on their own. Because of their luggage air travelers often need to arrive by some kind of motorized vehicle (whether it be a train, bus or car).
• Airports generally "came of age" in the automobile era, where it was assumed that the majority of people accessing them would be by private vehicle, so little thought was given to pedestrian or even transit paths.
• Also because they came of age later than bus and especially railway stations, airports also tend to be located on the outskirts or in non-central parts of the city, so fewer people are willing to walk there.

Here's an airport that was re-engineered so that many of its passengers arrive by walking:

https://www.portstoronto.com/airport...an-tunnel.aspx

That is an airport on an island in Toronto Harbour. Before the pedestrian tunnel, you would have to wait for a ferry.
Many Torontonians still arrives for YTZ departures by transit, car or cab.

It would have been nice to hear what the OP's motivation was but it doesn't look like we will hear it now.

At -8C, he might be walking on water?

Having spent my junior high and high school days in Edmonton, didn't think too much about -8 (we used to use Fahrenheit back then), but isn't -8 kind of cold for Vancouver? Don't recall it being quite that cold in Victoria.

I've walked to SAN, and sometimes it's faster than sitting in traffic along that route. And I've walked to and from the Rogers Centre in Toronto to Billy Bishop Toronto City Airport for Blue Jays games. The only issue was bringing my carry-on into the park.

From where :confused:

Even from the closest Trolley station it would be no contest. And from downtown :rolleyes: I've walked that at least half dozen times, and there's no way car or bus would take an hour to do this, even when there was construction along the way.

Walk to YVR is nice over Skytrain bridge, just not at 3:30am.

Cycle is doable too. From downtown take Burrard to Arbutus corridor then over Oak Street bridge. Arthur Laing has a marked bike lane but is far too dangerous.

Years ago I walked to CMB, sort of. Because of the Tamil insurgency, the airport was closed to taxis and so I needed to cover the final 1.5 km on foot dragging my Samsonite behind me.
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13F