Flights from Ontario, CA to USA from $22

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How to find the cheapest flight from
Ontario (ONT) to USA

All the information you need to plan the best ONT to LAX flight in 2021: compare Ontario to USA flight prices with the expected peak season, weather and rainfall in USA.

How far in advance should I book a flight from Ontario to USA?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 33 days in advance, which can save you up to 19% on flights from Ontario to USA compared to booking the week you need them. Waiting 33 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $91. For sooner than that we have options available in the next 3 days from $113.

When is the cheapest time to fly from Ontario to USA (ONT - US)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to USA as you normally would.

What is the cheapest month to fly from Ontario to USA?

August can be a great time to fly to USA from Ontario with a flight ticket averaging about $93. Cheapflights users have found deals in the month of August for as cheap as $37. The most expensive prices can be found in the month of December.

Cheap flights from Ontario to USA in October, November 2021

The best prices found for ONT to USA flights for October, November

26 Oct - 28 Oct

$33pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

30 Oct - 30 Oct

$39pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

6 Nov - 13 Nov

$40pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

Ontario to USA 2021 flight deals

Cheap flights to USA from Ontario found for this year

26 Oct - 28 Oct

$33pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

30 Oct - 30 Oct

$39pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

6 Nov - 13 Nov

$40pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

Non-stop flights to USA from Ontario

Save time with Ontario to USA direct flight deals

30 Oct - 30 Oct

$39pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

6 Nov - 13 Nov

$40pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

28 Oct - 1 Nov

$44pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

Last minute flights from Ontario to USA

Late deals on round-trip flights to USA from Ontario, departing today and this week

26 Oct - 28 Oct

$33pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

24 Oct - 27 Oct

$39pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

25 Oct - 28 Oct

$44pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas McCarran

LAS

Las Vegas McCarran

Frontier

Non-Stop

ONT

Ontario

One-way flights to USA from Ontario

The cheapest one-way flights from Ontario to USA

3:41 pm - 4:46 pm

Frontier

Nonstop

1h 05m

ONT - LAS

$22

JustFly

3:48 pm - 4:53 pm

Frontier

Nonstop

1h 05m

ONT - LAS

$23

Kiwi.com

4:56 pm - 8:14 pm

Frontier

Nonstop

2h 18m

ONT - DEN

$26

lastminute.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Ontario</span> to <span class="emphasized">USA</span> flights.

Flight FAQs

From Ontario to USA

What airport do you fly from for flights from Ontario to United States?

Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to United States. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

Which airlines flying from Ontario to United States have flexible cancellations due to COVID-19?

United Airlines, Alaska Airlines, and American Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from Ontario to USA for under $100 on Cheapflights?

Yes, there are multiple flights from Ontario to USA for under $100. The cheapest flight booked recently is on Frontier for just $39, but on average you can expect to pay $52.

Are there nonstop flights from Ontario to USA for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Ontario to USA under $100. A good price for a nonstop flight from Ontario to USA is less than $52.

Are there last-minute flights available from Ontario to USA for under $100?

There are currently 20+ open flights from Ontario to USA within the next 7 days for less than $100.

What are the most popular routes from Ontario to USA?

While some choose either Ontario - Seattle/Tacoma Intl or Ontario - Dallas/Fort Worth, Ontario - San Francisco is the most popular route from Ontario to USA.

What are the cheapest flights from Ontario to USA?

On average you can expect to pay $1,828 for a flight from Ontario to USA. The cheapest flight overall is $171 while the most popular route, (Ontario - San Francisco) is currently priced at $85.

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COVID Restrictions

View COVID Travel Restrictions for USA

Do I need a COVID test to fly to USA from Ontario?

Information is based on travel restrictions for travel to USA within the United States

Most visitors from Ontario need to provide a negative COVID-19 test result and/or quarantine to enter USA.

COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to USA.

Quarantine requirements
Visitors from Ontario are not required to quarantine after entering USA.

Do I need a test to fly back to Ontario from USA?

Returning to Ontario from USA

COVID-19 testing requirements
Visitors from USA must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Ontario.

Quarantine requirements
Visitors from USA are not required to quarantine after entering Ontario.

Hide COVID Travel Restrictions for USA

Destination points for flights from Ontario to USA

Select to see more specific information for flights from Ontario to all places in USA.

Flights from Ontario to Atlanta from $102 pp

Flights from Ontario to Austin from $111 pp

Flights from Ontario to Baltimore from $148 pp

Flights from Ontario to Boise from $163 pp

Flights from Ontario to Boston from $208 pp

Flights from Ontario to Charlotte from $117 pp

Flights from Ontario to Cincinnati from $118 pp

Flights from Ontario to Dallas/Fort Worth from $62 pp

Flights from Ontario to Denver from $44 pp

Flights from Ontario to Detroit from $125 pp

Flights from Ontario to Dulles Intl from $232 pp

Flights from Ontario to Eugene from $162 pp

Flights from Ontario to Fort Lauderdale from $123 pp

Flights from Ontario to George Bush Intcntl from $118 pp

Flights from Ontario to Hobby from $118 pp

Flights from Ontario to Honolulu from $268 pp

Flights from Ontario to Indianapolis from $180 pp

Flights from Ontario to Jacksonville from $215 pp

Flights from Ontario to John F Kennedy Intl from $197 pp

Flights from Ontario to Kahului from $197 pp

Flights from Ontario to LaGuardia from $153 pp

Flights from Ontario to Las Vegas from $34 pp

Flights from Ontario to Lihue from $197 pp

Flights from Ontario to Love Field from $285 pp

Flights from Ontario to Miami from $118 pp

Flights from Ontario to Minneapolis from $98 pp

Flights from Ontario to Nashville from $163 pp

Flights from Ontario to New Orleans from $123 pp

Flights from Ontario to Newark from $133 pp

Flights from Ontario to O'Hare Intl from $123 pp

Flights from Ontario to Oakland from $129 pp

Flights from Ontario to Orlando from $118 pp

Flights from Ontario to Philadelphia from $123 pp

Flights from Ontario to Pittsburgh from $273 pp

Flights from Ontario to Portland from $129 pp

Flights from Ontario to Reagan-National from $118 pp

Destination information for USA

Things to know before you go - useful duration and weather info for your trip from Ontario to USA.

1h 59m

Airports servicing Ontario

Ontario (ONT)

Airline	Cheapest	Average	Flexibility	On-time	COVID-19 safety
Frontier	$28	$217	No cancel fee	62%
Alaska Airlines	$43	$291	No cancel fee	75%
United Airlines	$48	$288	No cancel fee	69%
JetBlue	$49	$293	No cancel fee	62%
Delta	$52	$262	No cancel fee	N/A
Spirit Airlines	$62	$195	No cancel fee	65%
American Airlines	$71	$361	No cancel fee	71%
Southwest	$154	$261	No cancel fee	63%
JSX	$208	$313	No cancel fee	N/A	We couldn't confirm the COVID-19 safety measures taken by JSX. Please check directly on their website for additional information.
Linear Air Taxi	$782	$4,463	No cancel fee	N/A	We couldn't confirm the COVID-19 safety measures taken by Linear Air Taxi. Please check directly on their website for additional information.