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), sourced from the airport or the operator that runs each service, with minimums from OAG data.
Quick answer
- Terminals: 2 terminals
- Minimum connection time: 30 min domestic, 1 hr 30 min international to domestic
- Arrive: 2 hr before domestic, 3 hr before international (TSA advice)
- Free WiFi: Yes
Map
Terminals & connections
Ontario International Airport has 2 terminals. Transfer system: Short walk between terminals (landside).
Terminal 2
8 airlines: Alaska Airlines, Delta Air Lines, United Airlines, JetBlue, Frontier Airlines, Allegiant Air, and more
Terminal 4
2 airlines: American Airlines, Southwest Airlines
Minimum connection times
- Domestic to domestic
- 30 min
- Domestic to international
- 1 hr
- International to domestic
- 1 hr 30 min
- International to international
- 1 hr 30 min
- Transfer system
- Short walk between terminals (landside)
- Airside connected
- Not published
Layover helper
Find how long to plan for a connection at ONT: the official minimum connection time, plus a comfortable time of 30 minutes more, or 60 more when you clear customs or go through security again after a terminal change. Adjust trip type, terminal change, and checked-bag assumptions to match your itinerary.
Writing about ONT? Embed this connection time calculator on your site
Security & TSA
Security waits at ONT vary by time of day and checkpoint. The TSA advises arriving at least 2 hours before a domestic flight and 3 hours before an international flight, as Ontario International Airport's website notes.
- 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
No official source we checked publishes a ride time from ONT to downtown Ontario.
| Option | Cost | Time |
|---|---|---|
Uber/Lyft Rideshare | Varies | Varies |
Metrolink (via ONT Connect shuttle) Train Free ONT Connect shuttle between Terminal 2 or 4 and Rancho Cucamonga Metrolink station on the San Bernardino Line, then rail into LA Union Station. | Varies | Varies |
Parking
ONT parking ranges from $20/day economy to $30/day short-term. Official daily rates (all lots cashless): Lot 2/4 General $30 (close to terminals), Lot 2/4 Premium $35, Lot 3 Daily $25, Lots 5 & 6 $20 (cheapest general), Valet $40. ONT has no sub-$20 economy lot. General lots are shown as the short-term rate, Lot 3 Daily as long-term, and Lots 5 & 6 as economy.
- Short-term
- $30/day
- Long-term
- $25/day
- Economy
- $20/day
- Valet
- $40/day
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.
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 Airport5-min shuttle
Frequently asked questions
How early should I arrive at ONT?
The TSA advises arriving at least 2 hours before a domestic flight and 3 hours before an international flight, as Ontario International Airport's website notes. Security waits vary by time of day and checkpoint, so add buffer at busy times.
What is the minimum connection time at ONT?
ONT requires at least 30 minutes for domestic-to-domestic connections and 90 minutes for international-to-domestic connections. Transfer system: Short walk between terminals (landside).
How long does it take to get between terminals at ONT?
We have no officially published terminal-to-terminal transfer time for ONT, so plan around the minimum connection time and add time for the terminal change.
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. 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?
See the ground transport section for all options from ONT to Ontario.
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. Security waits vary by time of day and checkpoint.
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: $30/day short-term, $25/day long-term, $20/day economy, $40/day valet. Official daily rates (all lots cashless): Lot 2/4 General $30 (close to terminals), Lot 2/4 Premium $35, Lot 3 Daily $25, Lots 5 & 6 $20 (cheapest general), Valet $40. ONT has no sub-$20 economy lot. General lots are shown as the short-term rate, Lot 3 Daily as long-term, and Lots 5 & 6 as economy.
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. 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.
Can I cruise from Ontario?
Yes. Cruise ports within 100 miles of ONT: Port of Long Beach (40 mi). See our cruise port guides for sailing lines, parking, and embarkation details.
Compare ONT to other airports
See how ONT ranks against the other 111 airports in our dataset.
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.
Cruise ports near ONT
Cruise terminals within 100 miles of Ontario International Airport.
Compare other airports
Sources & verification
- Overview: https://www.flyontario.com
- Ground transport: https://www.flyontario.com/ground-transportation
- Terminals: https://www.flyontario.com/parking/lots
- Connection times: https://www.expertflyer.com/air/travel-information https://www.cbp.gov/sites/default/files/documents/WelcomeToTheUS.pdf
- Security: https://www.tsa.gov/precheck/schedule https://flyontario.com/at-airport/airport-security
- Parking: https://www.flyontario.com/parking/lots
- Wikipedia: https://en.wikipedia.org/wiki/Ontario_International_Airport
Connection times, security, ground transport and parking verified Oct 2026 against the sources above. Amenities, lounges and nearby hotels without a listed source are not yet verified. Always confirm with Ontario International Airport before flying.
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