ONT · Ontario, CA · Medium Hub

Ontario International Airport Guide

Terminals, minimum connection times, ground transport, parking, lounges, and layover advice for Ontario International Airport (ONT), every figure cited to the airport's own data.

Quick answer

  • Terminals: 2 terminals, not airside-connected (re-security between some)
  • Minimum connection time: 30 min domestic, 1 hr 15 min international to domestic
  • Arrive: 1 hr 15 min before domestic, 2 hr before international
  • To Ontario: about 1 hr one-way
  • Free WiFi: Yes

Terminals & connections

Ontario International Airport has 2 terminals. Not all terminals are airside-connected; transfers between some terminals require exiting security and re-clearing TSA.

Terminal 2

8 airlines: Alaska Airlines, Delta Air Lines, United Airlines, JetBlue, Frontier Airlines, Allegiant Air, and more

Terminal 4

3 airlines: American Airlines, Southwest Airlines, Spirit Airlines

Minimum connection times

Domestic to domestic
30 min
Domestic to international
45 min
International to domestic
1 hr 15 min
International to international
1 hr
Transfer system
Short walk between terminals (landside)
Airside connected
No

Layover helper

Interactive tool

Enter your layover details and we will tell you whether you have a tight connection, a comfortable connection, or enough time to leave ONT.

Security & TSA

Typical TSA wait at ONT is 20 minutes at peak and 5 minutes off-peak. Arrive at least 1 hr 15 min before a domestic flight and 2 hr before international.

TSA PreCheck
Available
CLEAR
Available
Global Entry
Available

Amenities

3 of 7 core amenities available at ONT: free WiFi, nursing rooms, pet relief. Free WiFi quality is rated good. Dining options span 1 terminal.

Showers

Not available

Sleep pods

Not available

WiFi

Free (good)

Nursing rooms

Available

Both terminals

Chapel

Not available

Pet relief areas

Available

Pet relief areas

Dining highlights

Terminal 2: El Cholo Cafe, Habit Burger

Ground transport to Ontario

ONT is about 1 hr from downtown Ontario by the fastest transit option.

Option Cost Time
Uber/Lyft
Rideshare
ONT is 40+ miles east of LA; traffic varies widely. Good alternative for Inland Empire destinations.
 $40-$120 45-120 min
Metrolink (via shuttle)
Train
Free shuttle to East Ontario Metrolink station, then rail into LA Union Station.
 $7-$15 60-90 min

Parking

ONT parking ranges from $10/day economy to $28/day short-term.

Short-term
$28/day
Long-term
$15/day
Economy
$10/day
Valet
Not available

Can I leave ONT during a layover?

With a 3-hour layover, stay inside ONT. Even 6-hour layovers can be tight at ONT given traffic and re-screening. Round-trip to the city center is about 2 hr plus re-screening on return.

LA is a long round trip; ONT is best used as the final destination for travelers to the Inland Empire, Riverside, or San Bernardino.

Overnight layover hotels

  • Hyatt Place Ontario Airport
    5-min shuttle
    $$

Frequently asked questions

How early should I arrive at ONT?

Arrive at least 75 minutes before a domestic flight from ONT, and 120 minutes before an international flight.

What is the minimum connection time at ONT?

ONT requires at least 30 minutes for domestic-to-domestic connections and 75 minutes for international-to-domestic connections. ONT terminals are not all airside-connected; expect to re-clear security between some terminals. Transfer system: Short walk between terminals (landside).

How long does it take to get between terminals at ONT?

Budget 5 min for same-terminal transfers and 15 min for different-terminal transfers at ONT via Short walk between terminals (landside).

Can I leave ONT during a 6-hour layover?

With 3 hours you should stay inside ONT. Even 6-hour layovers are tight at ONT. Round-trip to the city center is about 120 minutes plus re-screening. LA is a long round trip; ONT is best used as the final destination for travelers to the Inland Empire, Riverside, or San Bernardino.

Does ONT have showers?

ONT does not have dedicated public showers. Paid lounge access is typically required for shower facilities.

Does ONT have sleep pods?

ONT does not have dedicated sleep pods. Check premium airline lounges for quiet rooms.

Is WiFi free at ONT?

Yes. ONT offers free WiFi throughout the airport.

What is the cheapest way to get from ONT to Ontario?

The cheapest option is typically Metrolink (via shuttle) at $7-$15, taking 60-90 minutes. Free shuttle to East Ontario Metrolink station, then rail into LA Union Station.

Is there TSA PreCheck and CLEAR at ONT?

ONT supports TSA PreCheck and has CLEAR lanes. Global Entry kiosks are available for returning international travelers. Typical peak-hour wait is 20 minutes.

Where should I eat at ONT during a layover?

Notable dining at ONT includes El Cholo Cafe (Terminal 2), Habit Burger (Terminal 2).

How much does parking cost at ONT?

ONT parking rates: $28/day short-term, $15/day long-term, $10/day economy. Book online in advance for significant discounts vs. drive-up rates.

Is there a hotel at ONT for overnight layovers?

The closest option is Hyatt Place Ontario Airport (5-min shuttle, $$). Budget time for the shuttle or rideshare in your overnight plan.

Which terminal does my airline use at ONT?

ONT has 2 terminals. Major airline assignments: Terminal 2: Alaska Airlines, Delta Air Lines, United Airlines; Terminal 4: American Airlines, Southwest Airlines, Spirit Airlines. Confirm with your boarding pass before arrival since a few airlines operate from multiple terminals depending on route.

Are there pet relief areas at ONT?

Yes. Pet relief areas.

Compare ONT to other airports

See how ONT ranks against the other 69 airports in our dataset.

Best for layovers ONT is one of the harder airports to leave With sleep pods See which airports offer capsule hotels and nap rooms Shortest MCT ONT dom-to-dom: 30 min · intl-to-dom: 1 hr 15 min

Airlines operating at ONT

Look up baggage policies for any airline flying out of ONT.

Pack for your Ontario trip

Destination packing lists for cities served by ONT.

Compare other airports

Sources & verification

Verified 2026-04-14. Airport operations, parking rates, and amenities change; always confirm with Ontario International Airport before flying.