Kansas City International Airport (MCI) is 18 miles Northwest of the Downtown Marriott-Kansas City, and is serviced by major airlines to include, Air Canada, Alaska, American, Delta, Southwest, and United.  As well as the mid-sized airlines of Allegiant, Frontier, and Spirit.
Airport to Hotel:
Kansas City has service for the ride apps of zTrip,  Lyft and Uber, with one way costs ranging from $29-$70, depending on your ride level.
Taxis will cost approximately $55 one way.
All major rental car services are also available.
We have put together a package through Super Shuttle of Kansas City.  Shuttles run every 30 minutes from the airport until very late evening (they have CSR’s manning the booths at the airport until midnight). Super Shuttle actually runs 24/7, so as long as you have a reservation, you will be covered whatever the time may be.  The cost is $30 round-trip per person. 
To book this transportation click the following link:
While in downtown:
The hotel has limited courtesy shuttle service for rides around downtown, and of course there are taxis, and the ride app services listed above. 
We have negotiated for free parking for hotel guests.  The hotel offers parking at $3/hr or $19 per day for those needing parking that are not staying at the hotel.  The onsite parking garage height clearance is 6 feet.  There is an offsite garage with clearance of 8 feet 9 inches, subject to the parking fees of that structure, and oversized valet is $30.00 per night.