Terminal 4 is the busiest of Phoenix Sky Harbor's two active terminals — home to American Airlines' largest hub, a major Southwest Airlines base, and a deep roster of international carriers. If you're flying out of PHX, chances are good this is your terminal, and a little preparation goes a long way. Below is everything travelers need before departure day: checkpoint locations and hours, TSA PreCheck availability, realistic security wait times, parking rates, Sky Train access on Level 3, and when a door-to-door shuttle makes more sense than driving yourself.
Which Airlines Fly From Terminal 4 at PHX?
Sky Harbor operates two active passenger terminals today — Terminal 3 and Terminal 4. (Terminal 2 closed in 2020.) Terminal 4 carries the heavier load:
- American Airlines: Phoenix is American's largest hub, and Terminal 4 is the heart of that operation.
- Southwest Airlines: Southwest bases a major operation here, with a dense schedule of domestic flights.
- International carriers: Aeromexico, Air France, British Airways, China Airlines, STARLUX, Volaris, and WestJet connect PHX nonstop to Mexico, Europe, Asia, and Canada.
- Contour: A domestic regional carrier that rounds out the lineup.
Flying Delta, United, Alaska, Air Canada, Frontier, JetBlue, Sun Country, Hawaiian, Breeze, Allegiant, Porter, Southern Airways Express, Denver Air Connection, or Advanced Air? Those airlines all operate from Terminal 3 — double-check your terminal before you leave home.
Terminal 4 Security Checkpoints: Hours and Tips
Terminal 4 has four security checkpoints, each with its own hours:
- Checkpoint A: Open 24 hours
- Checkpoint B: 4:15 a.m. – 8:30 p.m.
- Checkpoint C: 3:15 a.m. – 12:30 a.m.
- Checkpoint D: 3:15 a.m. – 7:30 p.m.
Three tips worth knowing:
- TSA PreCheck is available at all four checkpoints from 5 a.m. to 7 p.m. daily.
- Checkpoint lines are flexible. If the line at your nearest checkpoint is longer than another, you can use any checkpoint in Terminal 4 — an easy way to cut your wait during peak periods.
- Late-night and pre-dawn flyers should plan on Checkpoint A. It's the only T4 checkpoint open around the clock. (Terminal 3's checkpoint, by comparison, runs 24 hours.)
Why Terminal 4 Is the Busiest — and Why You Should Arrive Earlier
Terminal 4 funnels two enormous airline operations — American's biggest hub and Southwest's Phoenix base — through one set of security lanes, plus all international departures. The result is wait times that swing widely depending on when you fly:
- Typical waits: Security usually runs about 10–20 minutes.
- 5–8 a.m. rush: Expect 30–45+ minutes as the morning wave of departures stacks up.
- Holidays and spring break: The same 30–45+ minute range applies, and lines can stretch longer.
- Quietest stretch: Roughly 10 a.m. to 2 p.m.
The practical takeaway: build in extra buffer for early-morning flights, holiday travel, and spring break. At the airport's busiest terminal, the difference between a calm start and a gate sprint is almost always how early you arrived.
Reserve Your Spot in Line: PHX Reserve
Sky Harbor offers a free service called PHX Reserve (phx.seamless.aero) that lets you book a TSA-line appointment ahead of time. You show up at your scheduled window and clear security with far less waiting — especially helpful during the morning rush or holiday crowds.
- Terminal 3: Appointments are available 24/7.
- Terminal 4: Appointments are offered at Checkpoint A 24 hours a day, and at Checkpoints B, C, and D during their regular hours.
Terminal 4 Parking: Rates and Daily Maximums
Prefer to drive yourself? Sky Harbor parking is charged at $6 for the first hour, plus $3 for each additional 30 minutes, until you reach the lot's daily maximum:
- Terminal garages: $33/day — closest to the doors, highest price.
- East Economy Garages A & B: $19/day.
- East Economy (uncovered): $16/day.
- 24th Street Station: $16/day, with direct Sky Train access.
- West Economy Garage: $19/day, with a seasonal Park & Walk rate of $10.
- Valet: $43/day for curbside convenience.
Getting to Terminal 4: Free Sky Train, Level 3 Station
You don't have to park at the terminal to reach it. The PHX Sky Train is free, runs 24/7, and stops directly at Terminal 4:
- Frequency: Trains arrive roughly every 3.5–7 minutes between 5 a.m. and 10 p.m., with reduced frequency overnight (10 p.m.–5 a.m.).
- Stations: 44th St/Washington (a connection point for Valley Metro Rail), 24th Street, Terminal 3 (Level 5), Terminal 4 (Level 3), and the Rental Car Center.
- Terminal 4 access: The station sits on Level 3 of the terminal itself, so you're inside the building the moment you step off the train.
If you're coming from light rail, the 44th St/Washington station lets you transfer from Valley Metro Rail straight onto the Sky Train — no driving required.
Meeting an Arriving Flight? Three Free Cell Phone Lots
Sky Harbor maintains three free, 24-hour Cell Phone Waiting Lots for pickups:
- East Cell Phone Lot: about 90 spaces
- West Cell Phone Lot: about 90 spaces
- 44th Street Station Lot: about 25 spaces
Each lot offers real-time flight displays so you can time your pickup, and drivers must stay with their vehicles.
Skip the Garage: Door-to-Door Shuttle Service
For many travelers, the simplest way to start a trip is not to drive at all. Airport Shuttle of Phoenix provides door-to-door airport shuttle service to and from PHX — you're picked up at your home, hotel, or office and dropped off right at the terminal. No circling the garage for a spot, no hauling luggage from an economy lot to the Sky Train, and no parking fees adding up while you're away.
The service covers Phoenix Sky Harbor and cities throughout the Valley, including Tempe, Scottsdale, Mesa, Chandler, Gilbert, Glendale, Peoria, and Surprise, along with longer trips to Tucson, Flagstaff, Sedona, and Prescott. For those notoriously busy 5–8 a.m. departures out of Terminal 4, a scheduled pickup means your travel day starts on your timeline — not the parking garage's.
Traveling from outside Phoenix proper? Airport Shuttle of Phoenix provides door-to-door service across the Valley and beyond — including the Chandler airport shuttle, the Gilbert airport shuttle, and the Tempe airport shuttle.
Terminal 4 FAQ
What terminal is American Airlines at Phoenix Sky Harbor?
American Airlines operates from Terminal 4, which serves as the airline's largest hub. Southwest also flies from Terminal 4, along with international carriers such as British Airways, Air France, and WestJet. Delta, United, Alaska, Frontier, and the airport's other domestic carriers use Terminal 3.
What time does TSA open at Terminal 4?
Checkpoint A is open 24 hours. Checkpoint B runs 4:15 a.m.–8:30 p.m., Checkpoint C runs 3:15 a.m.–12:30 a.m., and Checkpoint D runs 3:15 a.m.–7:30 p.m. TSA PreCheck lanes are available at all four T4 checkpoints from 5 a.m. to 7 p.m. daily.
Can I use any security checkpoint at Terminal 4?
Yes. If the line at your nearest checkpoint is longer than another, you can use any checkpoint in Terminal 4 — especially handy during the 5–8 a.m. peak.
How early should I arrive for a flight out of Terminal 4?
Allow extra time at Terminal 4, the airport's busiest terminal. Security waits typically run 10–20 minutes, but plan for 30–45+ minutes during the 5–8 a.m. rush, holidays, and spring break. The quietest window is roughly 10 a.m.–2 p.m. A free PHX Reserve appointment at phx.seamless.aero can also shorten your wait.
Is there free parking at Phoenix Sky Harbor?
Terminal parking isn't free, but drivers picking up arriving passengers can use three free 24-hour Cell Phone Waiting Lots — East (about 90 spaces), West (about 90), and 44th Street Station (about 25). For parking, drive-up rates start at $6 for the first hour, with daily maximums ranging from $16 to $33 depending on the lot; valet is $43/day.
Does Airport Shuttle of Phoenix serve areas outside Phoenix?
Yes. The shuttle serves the entire Valley — Tempe, Scottsdale, Mesa, Chandler, Gilbert, Glendale, Peoria, and Surprise — plus Tucson, Flagstaff, Sedona, and Prescott, all with door-to-door transportation to and from Sky Harbor.
Related reading: Phoenix Sky Harbor Terminal 3: Complete Traveler Guide and PHX TSA Wait Times by Hour in our PHX travel series.
