17 airports, 2 territories

Canada

YUL

Montreal

YYZ

Toronto Pearson

BRD

Brainerd Lakes

CLT

Charlotte

ORD

Chicago O'Hare

DPA

Chicago DuPage

DET

Detroit Coleman A. Young

IAH

Houston

MSN

Madison, WI

ACK

Nantucket

LGA

New York LaGuardia

PTK

Oakland County

PIT

Pittsburgh

SAV

Savannah

VRB

Vero Beach

IAD

Washington Dulles

UES

Waukesha