|Phoenix–Mesa Gateway Airport|
|Owner/Operator||Phoenix Mesa Gateway Airport Authority|
|Serves||Phoenix metropolitan area|
|Focus city for|
|Elevation AMSL||1,384 ft / 421 m|
FAA airport diagram
Phoenix–Mesa Gateway Airport ( IATA: AZA, ICAO: KIWA, FAA LID: IWA), formerly Williams Gateway Airport (1994–2008) and Williams Air Force Base (1941–1993), is an international airport in the southeastern area of Mesa, Arizona, and 20 miles (17 nmi) southeast of Phoenix, in Maricopa County, Arizona.  The airport is owned and operated by the Phoenix–Mesa Gateway Airport Authority, and is a reliever airport for Phoenix Sky Harbor International Airport. It is a base for Allegiant Air. The airport authority is governed by a six-member board: the mayors of the towns of Gilbert and Queen Creek, the mayors of the cities of Mesa, Phoenix, and Apache Junction, and the tribal governor of the Gila River Indian Community. 
The FAA's National Plan of Integrated Airport Systems for 2007–2011 called Phoenix–Mesa Gateway a reliever airport, which is a general aviation airport used to relieve congestion at a large airline airport.  Allegiant Air began scheduled service from Mesa in October 2007.  Phoenix Mesa Gateway Airport records say the airport had 1,338,216 passenger boardings in calendar year 2017.
Most U.S. airports use the same three-letter location identifier for the FAA and IATA, but Phoenix–Mesa Gateway Airport has different codes for each. The aviation community generally uses the FAA code of IWA, while commercial passenger flight organizations use the IATA code of AZA. 
The airport was built in 1941 as Higley Field; it was renamed Williams Field on 24 February 1942 in honor of Arizona native 1st Lt. Charles Linton Williams (1898–1927), who while serving with the 19th Pursuit Squadron from Wheeler Field, Oahu was killed when he had to ditch his Boeing PW-9A, 26-353, in the Pacific Ocean about one mile off of Fort DeRussy, Territory of Hawaii. Then in 1948 the field was acquired by the United States military and renamed as Williams Air Base in January 1948. It was a flight training field during World War II.
The 1991 Base Realignment and Closure Commission recommended closing the base as its operating costs were too high; the base closed in 1993.
As the base was being shut down, it was decided that, with the growing traffic at Sky Harbor International Airport in Phoenix, an alternative airport would be needed. The runway was expanded to accommodate airliners and the facility opened in 1994 as Williams Gateway Airport. Bids began for some airlines to begin flights almost immediately.
In recent years, the airport has again become a center of flight training. Several large flight schools now take advantage of the flying weather in the Phoenix valley.
On July 31, 2007 the low-cost Las Vegas-based carrier Allegiant Air announced plans to open a focus city at Phoenix–Mesa Gateway Airport, connecting the Phoenix area to 13 cities. Service commenced on October 25, 2007, with cities being added until November 21, 2007. 
In a press release on September 17, 2007, the Williams Gateway Airport Authority governing board approved a name change for Williams Gateway Airport effective October 15, 2007 to Phoenix–Mesa Gateway Airport.
On June 16, 2015, after Elite Airways announced non-stop flights from San Diego and Salt Lake City to Phoenix–Mesa, Allegiant threatened to leave the airport.  This is primarily due to the incentives the airport is offering to Elite.  If Allegiant were to leave, it would consider relocating to the nearby Phoenix Sky Harbor International Airport.  
On January 21, 2017, Phoenix-Mesa welcomed its first international flight and first two international destinations, as Westjet inaugurated its seasonal service to Calgary and Edmonton, Alberta.  Westjet has already seen success at Phoenix Sky Harbor for years, with Calgary and Edmonton being the 1st and 6th most popular international destinations at Sky Harbor, respectively. 
In 1994, the Willams Gateway Airport Authority was established with a three-member board with representation from the three cities immediately adjacent to Williams Field. The original governing board consisted of the mayors of the towns of Gilbert and Queen Creek and the city of Mesa, who continue as members today.
In later years, the Gila River Indian Community and the city of Phoenix joined the Williams Gateway Airport Authority board (now Phoenix Mesa Gateway Airport Authority). Gila River Indian Community joined in 1995 and the City of Phoenix joined in 2006. The city of Apache Junction joined in 2013.
Now that the change of the Williams Gateway Airport name to Phoenix–Mesa Gateway Airport has occurred, the board approved resolution and ordinance does not change, diminish, give away, negate, nor reduce any of the board of directors and their respective city, town, or tribal government member voting authority and respective ownership. Phoenix–Mesa Gateway Airport continues to be owned and operated by the Phoenix Mesa Gateway Airport Authority.
A six-member airport Board of Directors is composed of elected officials from neighboring cities and a tribal government. Authority communities are:
- Runway 12C/30C: 10,201 ft × 150 ft (3,109 m × 46 m) Asphalt/Concrete
- Runway 12L/30R: 9,300 ft × 150 ft (2,835 m × 46 m) Concrete
- Runway 12R/30L: 10,401 ft × 150 ft (3,170 m × 46 m) Concrete
In the year ending December 31, 2017 the airport had 290,452 aircraft operations, an average of 796 per day: 80% general aviation, 13% air taxi, 4% airline and 3% military. In 2017, there were 138 aircraft based at this airport: 88 single-engine, 21 multi-engine and 29 jet. 
Seasonal: Cleveland, Indianapolis, Medford, Memphis, Milwaukee, St. Petersburg/Clearwater
|California Pacific Airlines||Carlsbad|
|Flair Airlines||Seasonal: Edmonton (begins December 15, 2018), Winnipeg (begins December 16, 2018)|
|Swoop||Seasonal: Edmonton |
- Air Evac ( Medevac airline)
- Fighter Combat International
- Advanced Training Systems International
- ATP Flight School
- Aviation Performance Solutions
- University of North Dakota UND Aerospace Foundation
- Chandler Gilbert Community College A&P Training
|2||Sioux Falls, South Dakota||34,480||Allegiant|
|3||Fargo, North Dakota||31,240||Allegiant|
|4||Cedar Rapids, Iowa||27,810||Allegiant|
|6||Rapid City, South Dakota||22,310||Allegiant|
|9||Bismarck, North Dakota||21,800||Allegiant|
|10||Idaho Falls, Idaho||20,700||Allegiant|
One of the biggest issues at IWA is the increase in passengers since Allegiant Air started operations. IWA did not anticipate this growth within the first year. Due to the increase from 14,588 enplanements in 2007 to 159,481 in 2008, facilities were becoming crowded. To alleviate this problem, extensive renovations and expansions have been completed, adding nearly 70,000 square feet (6,500 m2) of new space within the terminal. This added eight gates since IWA was established in 1994. The Airport broke ground on a final expansion plan in early 2013, to increase gates to ten. However, IWA is running out of real estate on the west side of the airfield, which will bring a halt to expansions until the east terminal facilities are complete.
In response to the expansion issues, PMGAA has begun planning for a new east terminal. The plan titled, Gateway 2030, was developed in June 2012.  The Gateway 2030 plan outlines the process, major findings, and recommendations associated with the cost feasible phasing approach to the development of approximately 700 acres (280 ha) of airport property and the supporting City infrastructure critical to ensure its success" (IWA, 2012b). The plan will be implemented in 4 phases. With the completion of phase one, IWA will be able to accommodate 1.5 million enplanements (3 million passengers). Much of phase one will address much needed access and infrastructure to access the new terminal. This includes access roads, parking, taxiways, aprons capable of Group III and IV aircraft, and the new 300,000 square feet (28,000 m2) pier concept terminal. The new terminal will have 14 gates, constructed in such a way to make room for 12 Group III aircraft and two Group IV aircraft.
Phase two has yet to be planned in detail, but will add another pier terminal to the main concourse, adding up to six gates, parking for 10,500 vehicles, and a 1,000 feet (300 m) extension of RW 12L/30R. Phase two will create the ability for IWA to handle 2.2 million enplanements. Phase three for the initial Gateway 2030 plan will add another pier terminal and second level to the main concourse and will create an additional eight gates, a new apron, more parking, and an additional taxiway.
Phase three will focus on privately owned retail, office, and hotel buildings that will be located on airport property. Phase three will allow IWA to accommodate 5 million enplanements.
Phase four will complete the 2030 plan, allowing IWA able to handle 10 million enplanements (20 million passengers) annually with a total of 60 gates and 21,000 vehicle parking spaces. Phase four will likely not be undertaken until 2030 or beyond, making cost estimates nearly impossible.
Due to the changing market, phase two, three, and four are likely to change. Gateway 2030 is estimated to cost more than $1.4 billion.
(NRHP = National Register of Historic Places)
(MHP = Mesa Historic Properties)
Housing Storage Supply Warehouse at Williams Air Force Base (now Arizona State University at the Polytechnic campus). The housing supply warehouse was constructed in December 1941 by the Del E. Webb Construction Company. The housing supply warehouse is significant for its association with the initial development and construction at Williams Air Force Base which is in the land in which the Phoenix–Mesa Gateway Airport and the Arizona State University at the Polytechnic campus are now located. Listed in the National Register of Historic Places – 1995. Reference 95000746
Water Tower at Williams Air Force Base (now Arizona State University at the Polytechnic campus). The water tower was constructed in the winter of 1941–1942 by the Del E. Webb Construction Company. The water tower possesses the associative quality that connects it to the history of Williams Air Force Base in the land in which Phoenix–Mesa Gateway Airport and the Arizona State University at the Polytechnic campus are now located. Listed in the National Register of Historic Places – 1995. Reference 95000745
The Flagpole was built in December 1941, the Base Flagpole is significant as an object for its important symbolic and traditional associations with the origins and history of Williams Air Force Base (now Phoenix–Mesa Gateway Airport). The pole was erected by the Del E. Webb Construction Company. Listed in the National Register of Historic Places – 1995 Reference 95000744.
Demountable Hangar located at the North Apron, Phoenix–Mesa Gateway Airport (formally Williams AFB), Mesa, Arizona. Built in 1942 and designed by the Del E. Webb Construction Company to resemble an enlisted aviator badge of the Army Air Force. Listed on the National Register of Historic Places in 1995, ref. #95000743.
- Phoenix Sky Harbor International Airport
- Williams Air Force Base
- Arizona World War II Army Airfields
- List of airports in Arizona
- FAA Airport Master Record for IWA ( PDF) effective August 17, 2017, AirportIQ 5010, GCR Inc.
- "Airport Authority Approves City of Apache Junction Membership". By Brian Sexton(Primary). Phoenix–Mesa Gateway Airport Authority. 29 July 2013. Retrieved 29 July 2013.
- National Plan of Integrated Airport Systems: 2007–2011, FAA, 2006-10-06
- "Allegiant Air announces new base in Phoenix–Mesa", Press release, Allegiant Air, 2007-07-31, archived from the original on 2007-10-12
- Phoenix–Mesa Gateway Airport Media Guide (PDF), Phoenix–Mesa Gateway Airport Authority, 2011-04-01
- "The Southeast Valley Insider", The Arizona Republic, 2006-03-30
- "Archived copy". Archived from the original on 2015-06-18. Retrieved 2015-06-17.
- "Phoenix-Mesa Gateway Airport May Get Dumped By Allegiant Air". KJZZ. 16 June 2015.
- "Report". bizjournals.com.
- http://www.washingtontimes.com, The Washington Times. "Allegiant Air may depart Gateway airport for Sky Harbor".
- "Phoenix-Mesa Gateway Airport to welcome first international flight". 19 January 2017.
- "U.S. International Air Passenger and Freight Statistics Report". 13 August 2012.
- "Swoop: New Canadian airline to offer flights from Phoenix-Mesa Gateway Airport". Retrieved 2 August 2018.
- Phoenix, AZ: Phoenix – Mesa Gateway (AZA) Scheduled Services except Freight/Mail, Bureau of Transportation Statistics, Research and Innovative Technology Administration, United States Department of Transportation, 2013, retrieved February 17, 2017
- "Airport Statistics". Phoenix-Mesa Gateway Airport. Retrieved July 2, 2017.
- "Gateway 2030: A Vision for the Northeast Area Development" (PDF), Press release, Phoenix–Mesa Gateway Airport, 2012-06-30, archived from the original (PDF) on 2012-10-14
- Phoenix–Mesa Gateway Airport, official web site
- Phoenix–Mesa Gateway Airport (IWA) at Arizona DOT airport directory
- Williams Air Force Base at GlobalSecurity.org
- ( PDF), effective November 8, 2018
- FAA Terminal Procedures for IWA, effective November 8, 2018
- Resources for this airport: