Kansai International Airport (KIX  ^IATA; 関西国際空港 Kansai-kokusai-kūkō, commonly 関空 Kankū) is the main international airport of Japan's Kansai region, including the cities of Osaka, Kyoto and Kobe.

Kansai International Airport was opened in 1994 on an artificial island in Osaka Bay, 40 km to the south of the city of Osaka. It is considered one of the most expensive civil engineering projects in the world. It is estimated that over US$20 billion has been spent between airport construction and fortification of the island, as the soft soils of the Osaka Bay have left the airport sinking into the water under its own weight far faster than predicted.

Unlike Tokyo's Narita, Kansai has fairly good domestic connections throughout Japan, making it a good choice for transiting onward. However, if you're flying domestically and your final destination is in Kansai, it probably makes more sense to fly to the more centrally-located Osaka (Itami) or Kobe airports instead.

The main terminal, Terminal 1, is designed by star Italian architect Renzo Piano. It is reputedly the longest building in the world at 1.7 km, over one mile, from end to end. For international flights, arrivals are on the 1st floor while departures are from the 4th floor. Domestic flights are handled on the 2nd floor.

Terminal 2 is a terminal designed for low-cost airlines (LCCs), with no jet bridges and no A/C. When it rains, passengers are lent umbrellas for their walk to their plane. Most LCCs prefer to stay at Terminal 1 despite higher operating costs, leaving Peach Aviation, Jeju Air, and Spring Airlines as the only tenants.

The Aeroplaza (エアロプラザ Earopuraza), across from Terminal 1, contains restaurants, shops, and a hotel (Hotel Nikko Kansai Airport), and is the place to go if you have time to kill before entering security.

Terminal 1 - Served by full service carriers such as ANA and JAL as well as most low-cost carriers such as AirAsia and Jetstar

Terminal 2 - Served by low-cost carriers Peach Aviation, Jeju Air, and Spring Airlines

Free shuttle buses (outside security) connect Terminal 1 and Terminal 2 at regular intervals between 05:00 and 23:00, departing every 2-10 minutes and taking about 7 minutes.

Within Terminal 1, two Wing Shuttle trains connect the central area to the tips of the North and South Wings, shaving half a kilometer off your walk.

• The Sky View (☏ +81 72-455-2082) is open year round. Shuttle buses run from the passenger terminal building, and take about 6 minutes (¥100 adults, ¥50 children). There is an observation deck (08:00-22:00), an amusement floor (M-F 10:00-18:00, Sa Su 10:00-20:00), a restaurant floor (11:00-22:00, last call 20:00), and a shopping floor (10:00-20:00).
• Kanku Lounge (☏ +81 72-455-2092, open 24 hours), On the second floor. Basic lounge open to all visitors, offering massage, PC desks, shower booths (¥500), women's room, kids' play room and business center. ¥300 for the first 30 min, then ¥600/hour.
• Refresh Room (☏ +81 72-455-2792, open 09:00-21:00, reception to 20:00), in the international departure area (4F), offers coin-op electronic massage chairs (¥200 for 10 minutes), regular massage chairs for ¥500 per hour, shower rooms (¥600 for 30 minutes, towels and soap included) and personal lounges with beds for ¥1,000 per hour (¥500 per hour thereafter).
• The Kids Room (☏ +81 72-455-2791 open 09:30-18:30), also in the international departure area (4F), has facilities for children from infants to seven years old, accompanied by a parent or guardian. The playroom, infant room and nursing room are free, and complimentary baby food and diapers are offered (one per child).
• Card Members Lounges. The 3 lounges accessible to Priority Pass members, all of them in the international departures area on the second floor. "Rokko" is in the North Wing, opposite Gate 12 (open 9:00-12:30); "Kongo" in the South Wing, opposite Gate 29 (9:00-18:00); "Annex Rokko" right next to the intermediate people mover station in the North Wing (8:00-21:00). (updated May 2023)

There are two convenience stores at the north end of the Passenger Terminal building (2F) and the Aeroplaza (1F).

The Aeroplaza (3F) is filled with eateries and shops for passengers who wish to do some last minute shopping. Although not as atrocious as some other international airports, prices may be slightly higher than on the mainland. At the arrival hall and on the departure floor, there are a few Starbucks coffee shops (open until 22:00).

• There are 47 restaurants in the Passenger Terminal, primarily on the 2nd and 3rd floors. Generally, these are less expensive than the airside options.
  • Matsuya (松屋) (3F) is a cheap Japanese fast food staple, open 24 hours, offering beef bowls.
  • 551 Horai (2F). A Chinese restaurant featuring "Butaman" - a pork meat pie something like piroshki, famous in Osaka.
• In the international departures area, your options are limited: a few coffee shops and convenience stores, plus Ganko Sushi in the middle of the main building, between the two immigration counters. The selection is limited relative to the landside portion of the terminal - if you have extra time, consider eating before going through the security checkpoint.
• For slightly cheaper eats, try the shops on the main floor of the hotel building. This area is also a good place for gift shopping, and has several other amenities such as a video arcade. Food and retail outlets usually close by 22:00.
• In the Aeroplaza (3F), there is a basic "Japanese-style pub".
• Hotel Nikko Kansai is the only other place for a pre-flight drink, with bars on the 11th floor.
• Budget travellers: on the terminal 4th floor, there is a variety shop called Air Rout, which sells beer and shochu-based drinks (chu-hai) at regular Japanese prices (about US$2 per can, much cheaper than most options), if you are satisfied to sit in general areas and drink beer.

• ATMs for cash withdrawal are available throughout the airport. Machines that accept International ATM cards include Seven Bank (First Floor near the International North Arrival Gate, Second Floor concourse and Fourth Floor International Departure Lobby), Japan Post (Second Floor concourse) and AEON Bank (Second Floor concourse). If you have a Maestro-issued EMV chip card (i.e. IC, chip-and-pin), you can only use the Seven Bank and AEON ATM machines.
• Currency Exchange facilities are available around the airport, with most open from the early morning until the late evening.
• The Aeroplaza (3F) features several stores, including Uniqlo for cheap, foreigner-sized clothing.
• Rinku Premium Outlets / Aeon Rinku Shopping Center, 3-28 Rinku-ourai-minami, Izumisano, ☏ +81 72-458-4600. 10:00 to 20:00. There are over 150 shops and restaurants. A shuttle bus runs from the north end of the international arrivals area outside the first floor of the airport. It takes about 10 minutes and costs ¥100. By taxi, it is about ¥3,000 from airport. 
• Sky Shop Town, on the same shuttle bus route, is in the Sky View (see above) area.
• Hotel Nikko Kansai (see below) also features an upscale gift shop.
• Numerous duty-free shops populate the international departures gate area.

Small internet kiosks are available throughout the airport. In the arrivals building, they cost ¥100 for 15 minutes, but once you're through the gates in the international departures area, access is free - look for the e symbol "information" computers.

There is also free wireless internet access in many parts of the terminal building. As of end of 2013 the speed of the connection is quite slow and on some gates the connection to the internet times out.

• There are nursing rooms on the second, third and fourth floors, inside the women's restrooms, and near the domestic and international gates.
• Business Center (☏ +81 72-456-7151, open 08:00-20:00) 4th floor.
• Coin-Operated Photo Booths, 4th and 2nd floor. 24 hr. ¥700.
• Prayer room, in the international departure area (4F), near "Refresh Room".
• There is a post office on the 2nd floor, with an ATM that accepts international credit cards. Open M-F 08:00-21:00, weekends & holidays 09:00-17:00.
• If you're feeling unwell, there is a health clinic (☏ +81 72-456-7185; 09:00-17:00 regular hours, emergency treatment available 24 hours) on the second floor provided by Kinki University Hospital.
• There is a hospital at Rinku-Town (about 10 minutes by car), Rinku General Medical Center, with English, Portuguese, Chinese and Spanish-speaking staff. (☏ +81 72-469-3111)
• There is a dental clinic (☏ +81 72-456-8601; open Sa Su 09:30-13:00, 14:00-19:30) on the third floor. Walk-ins are welcome.
• On the other hand, if you've had it with your good health, there are plenty of smoking rooms once you're through the international departures gate (4F) and on the domestic level (2F).
• There is a Police office in Kansai airport, 2nd floor North Area. English, French, German, Spanish, Chinese, Korean and Japanese Sign Language are understood.

• Rinku Town^{[dead link]} (りんくうタウン) is a shopping and entertainment complex located across the bridge from Kansai Airport. It's a 5-minute trip by JR or Nankai train (¥370).

Nanba ← Sumiyoshi Taisha ← Sakai ←	N  S	→ Wakayamashi
END ←	W  S	→ into → Wakayama
END ←	W  N	→ into → Sakai → Osaka