Is a 1½ hr layover in Ontario long enough?

ONT · Ontario International · Ontario, United States
Probably Enough

Yes, 1½ hours is probably enough for a layover at ONT (Ontario).

Well above any MCT here, leaving room for minor delays without stress.
Concourses
2
Max Transit
15m
Avg. Security
10m
Primary Hub
Domestic → Domestic
40min
Domestic → International
65min
International → Domestic
65min
International → International
75min
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Allow extra time if your connection requires moving between Terminal 2 and Terminal 4, since you must re-clear security.
Volaris flights to Mexico use a small federal inspection facility, so international connections should not be cut close.
Security lines are usually short outside of early morning and early evening banks, making quick connections feasible within a single terminal.
Check which terminal each of your flights uses in advance, as airline assignments split fairly evenly between the two buildings.
There is no landside train, so budget walking time or wait for the shuttle rather than assuming instant transfer.
12a6a12p6p12a
Low risk
Moderate
High risk
Tight connections are safer outside peak hours. Morning rush (6–9a), midday (11a–2p), and evening (4–8p) are highest risk.
Terminal 2 and Terminal 4 sit a few hundred yards apart and are connected by an outdoor walkway as well as a periodic shuttle bus that circles the terminal loop road. Passengers connecting between the two terminals must exit security, walk or ride the shuttle, and re-clear TSA screening, since there is no sterile connector between the buildings.
Is 1½ hours enough for a layover at Ontario International (ONT)?

Well above any MCT here, leaving room for minor delays without stress.

What is the minimum connection time at ONT?

Minimum connection times at Ontario International: Domestic-to-Domestic is 40 minutes, International-to-International is 75 minutes. These are the shortest layovers airlines will sell.

Can I make a 1½ hours connection at ONT on an international flight?

1½ hours clears the 75-minute international minimum connection time at Ontario International, but you should still head directly to your gate. Terminal 2 and Terminal 4 sit a few hundred yards apart and are connected by an outdoor walkway as well as a periodic shuttle bus that circles the terminal loop road. Passengers connecting between the two terminals must exit security, walk or ride the shuttle, and re-clear TSA screening, since there is no sterile connector between the buildings.

How much time do I need for a layover at ONT?

We recommend at least 45 minutes for a comfortable connection at Ontario International. This gives you enough buffer for security (typically 10 minutes) and transit between terminals (up to 15 minutes).

What happens if I miss my connection at ONT?

If you miss a connection, head to your airline's ticket counter in the departing terminal, as ONT's small size means gate agents can often rebook quickly, though same-day options may be limited given lower flight frequency.

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