Thirty miles southeast of downtown Phoenix, deep in the East Valley where the suburban grid gives way to open desert and the Superstition Mountains start rising on the horizon, sits Mesa Gateway Airport (AZA). One passenger terminal, 11 gates, and two operating airline brands. For anyone using AZA as the entry point to a short trip around Phoenix, getting through the airport barely registers as a step in the process.
For passenger bookings, the code is AZA. FAA materials use IWA; the ICAO identifier is KIWA. Check-in, security, and boarding all happen inside a single building, with no concourse maps to study and no shuttles between wings.
Passengers should still follow the airport and airline recommendation to arrive about two hours ahead of departure, mainly because Allegiant’s check-in counters can bottleneck 60 to 90 minutes out.
Williams Air Force Base occupied this site until 1993. Commercial flights launched in 2007, and AZA crossed 2 million travelers for the first time in its most recent full calendar count. Low-cost leisure flights to mid-size cities and seasonal snowbird traffic make up the core of what happens here.
After Phoenix withdrew from the airport authority board in 2024, the remaining members dropped “Phoenix” from the name. Booking platforms and airlines still vary between “Phoenix-Mesa Gateway” and “Mesa Gateway.”
A straight line is the best way to picture it. Enter through the south side, check in at the ticketing counters, follow the hallway to TSA, and step into a single linear pier. Gates 1, 1A, and 2 through 10 line up along that stretch, and nothing inside requires more than a few minutes on foot.
Baggage Claim is in the landside arrivals area. A post-security pet relief area is located near Gate 4, and an outdoor patio past the checkpoint lets you sit in open air while you wait. Complimentary Wi-Fi runs under the network name “Gateway Free Wi-Fi.” No lounge exists anywhere in the building.
Roughly 40 nonstop cities connect through AZA, nearly all mid-size or vacation-oriented: Provo, Fargo, Sioux Falls, Grand Rapids, Des Moines, Billings, Rapid City, and dozens more. Allegiant Air operates most of that traffic from its Las Vegas base, using Airbus A319 and A320 aircraft. Fewer weekly frequencies per route than legacy carriers means not every destination has daily departures, so checking the timetable for your specific city matters.
Alongside Allegiant, Sun Country Airlines operates nonstop flights to Minneapolis/St. Paul on Boeing 737s. Allegiant completed its acquisition of Sun Country in May 2026 and plans eventually to fold everything under the Allegiant brand. Until the two carriers receive a single operating certificate, they keep running separately, so today’s Sun Country ticket to Minneapolis still says Sun Country.
Craft taps and burgers come from O.H.S.O. Brewery between Gates 7 and 8 (with an attached open-air seating area), and grab-and-go sandwiches, soups, and pastries from Panera Bread between Gates 5 and 6. A Cold Beers and Cheeseburgers location near Gate 5 is under construction, with an opening expected by the end of 2026. Dunkin’ is also going in near Gate 3, and a coffee counter operates in Baggage Claim.
A cell phone waiting area is located at 5250 South Sossaman Road, just south of Ray Road on the west side of Sossaman. Vehicles cannot be left unattended.
At 6033 South Sossaman Road in Mesa, the airport is accessible from the Loop 202 Santan Freeway via Power or Hawes exits. Downtown Mesa is roughly 12 miles northwest. Scottsdale is about 30 miles out. Downtown Phoenix is approximately 35 miles away.
Valley Metro Route 184 stops outside Baggage Claim. There is no direct one-seat connection to downtown Phoenix or the light-rail line; you’ll need to transfer through the Valley Metro network.
Most people get here by rideshare, taxi, or private transportation from the Phoenix area. Several nearby hotels, including the Courtyard by Marriott and Hampton Inn, run guest shuttles.
A deep carrier roster, international flights, and concourse-level dining are not part of the equation here. What AZA does well is simplicity: there is less ground to cover, no terminal transfer, and only one security route to learn. Anyone comparing this experience against the multi-terminal layout at Sky Harbor will see a very different scale, but for Allegiant destinations or a Sun Country connection through Minneapolis, the tradeoff works.
Long-range airport vision calls for an eventual east-side terminal, with current concepts showing 14 gates initially and up to 25 in the ultimate phase. For now, 11 gates and a straight hallway are all there is, and that is exactly the point.
