Bike bag options for commuting to and from Airport
You could pair a Burly Travoy with a bike suitcase if you're willing to put up with a trailer while you're touring:


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The bonus is that you get to use the bike suitcase to hold all your belongings in a nice, watertight compartment while on the road. The downside is that it looks wonky. I'm not sure if the Travoy is designed for hundreds of miles of touring. It's certainly heavier and more unwieldy than an axle-mounted trailer. And you'll likely get hit with extra baggage fees for the bike suitcase.

In any case the Travoy+bike-suitcase combo what some Bromptoneers and other folders do, albeit our bikes are much smaller and so it's actually workable since we don't pay extra fees for our bikes. Here's a youtube video of someone doing it with a Tern.


                
            

Alternately: there's nothing that stops you from doing this with another type of trailer (such as an axle-mount). Or that would stop you from designing your own bike suitcase with detachable wheels so that it turns into a trailer (or trailer into a bike suitcase):