Sadly, this happens more often than you might think. Some international and domestic carriers experienced "uh oh" landing gaffs below:

2010s

October 30, 2011 - An Azul Linhas Aereas E-195, bound for Teresina, Brazil (THE), mistakenly lands at Domingos Rego Airport in Timon. Link.
September 7, 2011 - A Colgan Air Saab 340, bound for Lakes Charles, Louisiana (LCH), mistakenly lands at Southland Field (L75) in Carlyss. Link.
September 13, 2010 - An Aeromexico MD-83, bound for Tuxtla, Mexico (TGZ), mistakenly lands at Francisco Sarabia/Teran Military Airport. Link.

2000s

April 17, 2009 - A TAAG Angola 737, bound for Lusaka, Zambia (LUN), mistakenly lands at Zambia Air Force City Airport. Link.
April 8, 2009 - A Turkish Airlines 737, bound for Tbilisi, Georgia (TBS), mistakenly lands at Tbilisi Vaziani, a military airfield. Link.
August 16, 2006 - A Turkish Sky Airlines 737, bound for Poznan, Poland (POZ), mistakenly lands at Krzesiny, a military airfield. Link.
March 29, 2006 - A Eirjet A320, bound for Derry, Northern Ireland (LDY), mistakenly lands at Ballykelly, a military airfield. Link.
December 16, 2005 - A Pakistan International Airlines 737, bound for Karachi, Pakistan (KHI), mistakenly lands at Faisal, a military airfield. Link.
September 5, 2005 - A Wings Air MD-80, bound for Minangkabau International Airport in Padang, Indonesia (PDG), mistakenly lands at Tabing Airport, a military airfield. Link.
June 19, 2004 - The above-mentioned incident of a Northwest Airlines A319, bound for Rapid City, South Dakota (RAP), mistakenly landing at Ellsworth Air Force Base.
January 9, 2004 - A Shuttle America Saab 340, bound for University Park Airport in State College, Pennsylvania (SCE), mistakenly lands at Mid-State Regional Airport in Philipsburg (PSB). Link.
January 22, 2003 - A Chatauqua Airlines Embraer 145, chartered by the University of Notre Dame basketball team and bound for South Bend, Indiana (SBN), mistakenly lands at Elkhart Municipal Airport (EKI). See Tom Coyne, "Irish land at wrong airport because of pilot mistake," Associated Press, January 24, 2003.
July 30, 2002 - A LOT Polish Airlines aircraft, bound for Kaliningrad, Russia (KGD), mistakenly lands at Chkalovsk, an abandoned military airfield. Link.
June 27, 2001 - A TAM Fokker 100, bound for Teresina, Brazil (THE), mistakenly lands at Timon. See "Brazilian pilot mistakes private airstrip for urban airport," Deutsche Presse-Agentur, June 27, 2001.
March 14, 2001 - A TWA MD-80, bound for Yampa Valley Airport (HDN), in Steamboat Springs, Colorado mistakenly lands at Craig-Moffat Airport (CIG). Link.
December 8, 2000 - A BAX Global DC-8, bound for Oscoda-Wurtsmith Airport (OSC) in Oscoda, Michigan, mistakenly lands at Iosco County Airport (ECA) in East Tawas. Link.
June 17, 2000 - An Air Nova Dash 8, bound for Mont Joli, Quebec (YYY), mistakenly lands at Rimouski Airport (YXK). See "Pilots land at wrong airport," The Gazette (Montreal, Quebec), June 20, 2000.