In addition to listing where one can fly direct, this site also provides the number of monthly non stop flights on a particular route, the flight distance, flight time, and how full the flights have been on average. Hope you find nsflight.com useful!
Boston Bozeman (seasonal) Brisbane Burbank Calgary Cancun Charlotte Chicago/Midway Chicago/O'Hare Christchurch (seasonal) Cincinnati Cleveland Columbus Copenhagen Dallas/Fort Worth Dallas Love Field Delhi Denver Detroit Doha Dubai Dublin Edmonton
Arcata/Eureka Atlanta Auckland Austin Bakersfield Baltimore Barcelona (seasonal) Belize City Bengaluru Bishop (seasonal) Boise Boston Bozeman (seasonal) Brisbane Burbank Calgary Cancun Charlotte Chicago/Midway Chicago/O'Hare Christchurch (seasonal)
Boston Bozeman (seasonal) Brisbane Burbank Calgary Cancun Charlotte Chicago/Midway Chicago/O'Hare Christchurch (seasonal) Cincinnati Cleveland Columbus Copenhagen Dallas/Fort Worth Dallas Love Field Delhi Denver Detroit Doha Dubai Dublin Edmonton Eugene Everett Frankfurt Fresno Ft. Lauderdale Grand Junction...