Northern California TRACON (NCT) (Terminal Radar Approach Control), or NorCal TRACON for short, is an air traffic control facility that provides safety alerts, separation, and sequencing of air traffic arriving, departing, and transiting the airspace and airports in Northern California.
 Located in Rancho Cordova near Sacramento, NCT controls airspace over 19000 square miles, and serves Reno International Airport, Sacramento International Airport, San Jose International Airport, Oakland International Airport, and San Francisco International Airport, plus 19 other smaller airports with air traffic control towers.
 NCT is the 3rd busiest TRACON in America.
 NorCal TRACON is the step between local control (in an airport's control tower) and Air Route Traffic Control Center (ARTCC), in this case, Oakland Center (ICAO code: ZOA).
 San Francisco International Airport is the 2nd largest airport in California and the largest airport serving Northern California.
Oakland International Airport (IATA: OAK, ICAO: KOAK, FAA LID: OAK) is an international airport in Oakland, California, United States.
 It is located approximately 10 miles south of Downtown.
 It is owned by the Port of Oakland.
 The airport has passenger service to cities in the United States, Mexico, and Europe.
 Cargo flights fly to cities in the United States, Canada, and Japan.
Provo Municipal Airport (IATA: PVU, ICAO: KPVU, FAA LID: PVU) is a public airport two miles (3 km) west of Provo, in Utah County, Utah.
 The airport hosts Allegiant Air flights to four airports, one in Arizona and three in California - Phoenix/Mesa Gateway Airport, Los Angeles International Airport, San Diego International Airport and Oakland International Airport.
 It is the second busiest public airport in Utah by aircraft movements, with 172,000 aircraft operations in the year ending May 2007.
Oakland International Airport station is a Bay Area Rapid Transit (BART) station on the Coliseum–Oakland International Airport line in Oakland, California, United States.
 This station is on the system's Automated Guideway Transit (AGT) spur line, which carries passengers between Oakland International Airport (OAK) and Oakland Coliseum Station.
Boise Airport (IATA: BOI, ICAO: KBOI, FAA LID: BOI) (Boise Air Terminal or Gowen Field) is a joint civil-military airport three miles south of Boise in Ada County, Idaho, United States.
 The airport is operated by the city of Boise Department of Aviation and is overseen by an Airport Commission.
 It is by far the busiest airport in the state of Idaho, serving more passengers than all other Idaho airports combined and roughly ten times as many passengers as Idaho's second busiest airport, Idaho Falls Regional Airport.
The Doolittle maintenance and storage facility (also known as “The Wheelhouse”) is the operations management center for the Coliseum–Oakland International Airport line.
 The building is used for storage and maintenance of the Cable Liner cars, and is also the powerhouse for the system’s 12 ft drive wheels, and is an essential part of Bay Area Rapid Transit's Coliseum–Oakland International Airport line.
ATA Airlines, Inc. – formerly known as American Trans Air and commonly referred to as ATA – was an American low-cost scheduled service and charter airline based in Indianapolis, Indiana.
 ATA operated scheduled passenger flights throughout the U.S. mainland and Hawaii and San Juan, Puerto Rico, as well as military and commercial charter flights around the world.
 ATA also operated flights to Portugal (LIS, OPO, TER, PDL and SMA).
 In its early days the airline did charters throughout the World and had bases in Chicago, Detroit, New York, Indianapolis, Oakland and Milwaukee.
 Later when they entered scheduled service the airlines maintained focus cities at Chicago Midway International Airport, Honolulu International Airport, and Oakland International Airport.
Trans International Airlines (TIA) was an airline that offered charter service from and within the United States.
 It also operated scheduled passenger service flying as Transamerica Airlines as well as charter flights during its last decade.
 Its headquarters were on the grounds of Oakland International Airport (OAK) in Oakland, California.
The Coliseum–Oakland International Airport line, also known informally as the BART to OAK line, is an automated guideway transit (AGT) system operated by Bay Area Rapid Transit (BART) between BART's Coliseum Station and Oakland International Airport.
 The system opened for revenue service on November 22, 2014 and is integrated into BART’s fare system.
 During planning and construction, it was known as the Oakland Airport Connector (OAC) project.
John C. Munro Hamilton International Airport (IATA: YHM, ICAO: CYHM) is an international airport located in Mount Hope, Hamilton, Ontario, Canada.
 It is named for John Carr Munro, former Canadian Member of Parliament in Hamilton and cabinet minister.
 The airport is situated 11 km and 64 km southwest of Downtown Hamilton and Downtown Toronto, respectively.
 It is one of four airports serving Greater Toronto providing scheduled passenger service and serves as an alternate and reliever for nearby Toronto Pearson International Airport.
 Former British airline Flyglobespan referred to the airport as "Toronto Hamilton International Airport".

Question: Which airport has passenger service to Canada and Japan, Oakland International Airport, or Boise Airport?
Answer: Oakland International Airport