| 2026-06-16 | Center of activity |
| 2025-11-27 | Center of activity |
| 2025-07-14 | Major airport, e.g. |
| 2024-11-17 | Kennedy for American, e.g. |
| 2023-07-10 | Place with many airline connections |
| 2023-03-17 | Pivotal part of a revolution |
| 2022-11-14 | Center of activity |
| 2022-10-09 | Center |
| 2020-09-19 | Where many connections are made |
| 2019-07-20 | Nucleus |
| 2019-05-11 | Likely spot for a layover |
| 2018-07-27 | Relatively easy city to fly into and out of |
| 2016-09-12 | Wheel's center |
| 2016-08-08 | Airline's base of operations |
| 2016-06-16 | Nerve center |
| 2015-12-29 | Airport with many connecting flights |
| 2015-09-20 | Nucleus |
| 2015-04-22 | LAX or ORD, to United |
| 2015-02-10 | Center |
| 2014-10-24 | Trivial Pursuit board location |
| 2013-12-29 | Center of activity |
| 2013-11-07 | O'Hare or Newark Liberty |
| 2012-11-09 | Many a layover locale |
| 2012-10-25 | Turning point |
| 2012-05-09 | Center of a Trivial Pursuit board |
| 2011-10-19 | Big airport |
| 2011-02-14 | Wheel's center |
| 2009-05-10 | Indirect flight stop-off |
| 2009-01-19 | Atlanta, for Delta |
| 2007-11-07 | Important airport |
| 2005-09-20 | Center of activity |
| 2005-09-13 | Airline's home base |
| 2005-06-18 | Activity center |
| 2004-08-16 | Center of activity |
| 2004-05-10 | Where spokes meet |
| 2004-02-24 | Airline's home base |
| 2003-05-06 | Wheel's center |
| 2002-12-15 | Center |
| 2002-10-13 | Airline locale |
| 2002-07-09 | Busy airport |
| 2001-12-11 | Focal point |
| 2001-05-27 | Core |
| 2000-11-03 | Turning point |
| 1999-04-14 | Center |
| 1998-11-25 | Focus |
| 1998-05-02 | Meeting place |
| 1997-01-10 | Focal point |
| 1995-04-03 | Boston's nickname, with "the" |
| 1994-12-16 | Pivot |
| 1994-12-03 | Focus |
| 1994-07-30 | Center piece |
| 1994-02-21 | Spokes' intersection |