Springfield SFY (MA) to Springfield SPI (IL) doesn't result in any connection for my booking advisor, neither to Springfield SGF (MO) nor Springfield VSF (VT). Neither does any other combination yield results, nor does Marshall MLL (AK) to the Marshall Islands MAJ nor St. Petersburg PIE (FL) to St. Petersburg/Leningrad LED (Russia)too bad, we could have listened to the song of the same name on the flight, nor could any combination of Newcastle/New Castle to New Castle be found.
To get from Alexandria AEX (LA, USA) to Alexandria HBE (Egypt) it takes 3 to 4 stops, so sadly that's out. Most ancient Alexandrias lack airports.
Glasgow GLA (Scotland) to Glasgow GCW (MT) has 3 stops. As is Trinidad (TTD) to Trinidad-Tobago, a country, using Port of Spain POS as a mark. Or Armenia AXM in Colombia to Yereven EVN in Armenia.
From Lebanon LEB (NH), it's 2 stops to Beirut BEI in Lebanon, so... kinda on/off the mark again? But remember Newcastle? Newcastle NCL (England) connects with Newcastle NTL (Australia) via 2 stops. Melbournde MEL (Australia) to Melbourne MLB (FL) has, once again, 2 stops. Roma RMA (Australia) to Roma ROM (Italy) usually has 2 or 3 stops.
More 2 stop: La Paz LPB (Bolivia) to La Paz LAP (Mexico). Sydney YQY (NS) to Sydney SYD (Australia). Augusta AGS (GA) to Augusta AUG (ME). Aberdeen ABZ (Scotland) to Aberdeen ABR (SD). Kandahar KDH (Afganistan) to Alexandria HBE (Egypt), because Kandahar is one of the 20-something Alexandrias. Or Kandahar KDH to Khujand LBD (Tajikistan), also founded as... Alexandria. Or from Khujand LBD to Termez TMJ (Uzbekistan)...
Kingston KIN (Jamaica) to Kingston YGK (ON, Canada) is 1 or 2 stops, we get better!
Same for London LON (England) to London YXU (ON), 1 stop and occasional 2 stops, as is San Jose SJC (CA) to San Jose SJO (Costa Rica), as is from San Jose SJO to San Jose SJD (Mexico), or Santiago SCL (Chile) to Santiago STI (Dominican Republic), or Manchester NHT (NH) to Manchester MAN (England) or Rochester ROC (NY) to Rochester RST (MN). Or Manhattan MHK (KS) to Manhattan, New York NYC (NY), landing in EWR or JFK.
But to get from San Jose SJC (CA) to San Jose SJD (Mexico) or Columbus CMH to Columbus CSG (GA), it's always 1 stop, Again, a little better on the track. Same for Washington (DC) WAS to Washington (State) using SEA. Or Saint John YSJ (Canada) to St.John's YYT (Canada). And another case of former-Alexandrias: Kandahar KDH to Herat HEA (both Afganistan) via Kabul.
my winner is:
- Santa Cruz (de la Palma) SPC Santa Cruz (de la Tenerife) TCI (both Spain) - which is a 30 mintues nonstop domestic flight in Spain.
Kaliningrad (since 1996: Korolyov) to Kaliningrad KGD (formerly: Königsberg) in Kaliningrad Oblast would have been a nonstop flight... from Moscow SVO.
The mad Alexandria-dash, always taking 2 stops inbetween ancient Alexandrias:
Alexandria HBE - Kandahar KDH - Khujad LBD - Termez TMJ