Question: What airport sharing a state with KOFI is the busiest?

full_context: Document 1: Alaska: Regular flights to most villages and towns within the state that are commercially viable are challenging to provide, so they are heavily subsidized by the federal government through the Essential Air Service program. Alaska Airlines is the only major airline offering in-state travel with jet service (sometimes in combination cargo and passenger Boeing 737-400s) from Anchorage and Fairbanks to regional hubs like Bethel, Nome, Kotzebue, Dillingham, Kodiak, and other larger communities as well as to major Southeast and Alaska Peninsula communities.
Document 2: KPHI: KPHI (1130 AM) is a radio station located in Honolulu, Hawaii. The station, which is owned by Hochman-McCain Hawaii and offers a Hawaiian Oldies/Classic Hits format, and debuted between 2018-2019. In addition to broadcasting at 1130 kHz, it is also transmitting on Oceanic Time Warner Cable digital channel 882 for the entire state of Hawaii. Its studios are located in Downtown Honolulu, and its transmitter is located near Mililani, Hawaii.
Document 3: Alaska: Many communities have small air taxi services. These operations originated from the demand for customized transport to remote areas. Perhaps the most quintessentially Alaskan plane is the bush seaplane. The world's busiest seaplane base is Lake Hood, located next to Ted Stevens Anchorage International Airport, where flights bound for remote villages without an airstrip carry passengers, cargo, and many items from stores and warehouse clubs. In 2006 Alaska had the highest number of pilots per capita of any U.S. state.
Document 4: KOFI: KOFI (1180 AM) is a radio station licensed to serve Kalispell, Montana. The station is owned by KOFI, Inc. It airs an Oldies music and News/Talk radio format. The station first signed on in 1955. It was assigned these call letters by the Federal Communications Commission.
Document 5: KIRX: KIRX (1450 AM, "NewsTalk & Good Time Oldies") is a radio station licensed to the city of Kirksville, Missouri and serves the northeast Missouri area.
Document 6: KFAB: KFAB (1110 AM) is a 50,000 watt clear channel news and talk radio station licensed to Omaha, Nebraska. The station is owned by iHeartMedia, Inc..
Document 7: KXZI-LP: KXZI-LP (101.9 FM, "Montana Radio Cafe") is a radio station licensed to serve Kalispell, Montana. The station is owned by Scott Johnston and the broadcast license is held by The Cross Works Ministries. KXZI-LP airs a variety format described as "front porch" music.
Document 8: KONI (FM): KONI (104.7 FM) is a radio station licensed to serve Lanai City, Hawaii. The station is owned by Hochman Hawaii Publishing, Inc. It airs an Oldies music format.
Document 9: Montana: Bozeman Yellowstone International Airport is the busiest airport in the state of Montana, surpassing Billings Logan International Airport in the spring of 2013. Montana's other major Airports include Billings Logan International Airport, Missoula International Airport, Great Falls International Airport, Glacier Park International Airport, Helena Regional Airport, Bert Mooney Airport and Yellowstone Airport. Eight smaller communities have airports designated for commercial service under the Essential Air Service program.
Document 10: KZOI: KZOI (1250 AM) and its translator at 97.1 FM is a radio station licensed to serve Dakota City, Nebraska. The station is owned by John and Heidi Small, through licensee Cup O' Dirt LLC. It airs a regional Mexican format.
Document 11: Montana: Montana has 56 counties with the United States Census Bureau stating Montana's contains 364 "places", broken down into 129 incorporated places and 235 census-designated places. Incorporated places consist of 52 cities, 75 towns, and two consolidated city-counties. Montana has one city, Billings, with a population over 100,000; and two cities with populations over 50,000, Missoula and Great Falls. These three communities are considered the centers of Montana's three Metropolitan Statistical Areas.
Document 12: Alaska: The bulk of remaining commercial flight offerings come from small regional commuter airlines such as Ravn Alaska, PenAir, and Frontier Flying Service. The smallest towns and villages must rely on scheduled or chartered bush flying services using general aviation aircraft such as the Cessna Caravan, the most popular aircraft in use in the state. Much of this service can be attributed to the Alaska bypass mail program which subsidizes bulk mail delivery to Alaskan rural communities. The program requires 70% of that subsidy to go to carriers who offer passenger service to the communities.
Document 13: KOAI: KOAI (95.1/94.9 FM "The Oasis") is a classic hits radio station serving the Phoenix metropolitan area and licensed to Sun City West, Arizona. The station is owned by Sun City Holdings under the name of "Sun City Communications," and is part of the Great Hill Partners investment portfolio. It is licensed to and operated by Riviera Broadcast Group. Its studios are located on 7th Street in Midtown Phoenix, while its transmitter is located in Crown King, Arizona (producing a rimshot signal from 50 miles northwest of Phoenix).
Document 14: Montana: Railroads have been an important method of transportation in Montana since the 1880s. Historically, the state was traversed by the main lines of three east-west transcontinental routes: the Milwaukee Road, the Great Northern, and the Northern Pacific. Today, the BNSF Railway is the state's largest railroad, its main transcontinental route incorporating the former Great Northern main line across the state. Montana RailLink, a privately held Class II railroad, operates former Northern Pacific trackage in western Montana.
Document 15: Havre City–County Airport: Havre City–County Airport is a public use airport located three nautical miles (6 km) west of the central business district of Havre, a city in Hill County, Montana, United States. It is owned by the City of Havre and Hill County. The airport is served by one commercial airline, subsidized by the Essential Air Service program.
ground_truth: Bozeman Yellowstone International Airport
sub_queries: What state is KOFI located? Answer: Montana
What is the name of the busiest airport in Montana ? Answer: Bozeman Yellowstone International Airport