Flights from Ontario, CA to USA from $17

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 2022: 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 May, June 2022

The best prices found for ONT to USA flights for May, June

29 May - 15 Jun

$32pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

7 Jun - 8 Jun

$35pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

25 Jun - 1 Jul

$38pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

Ontario to USA 2022 flight deals

Cheap flights to USA from Ontario found for this year

29 May - 15 Jun

$32pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

7 Jun - 8 Jun

$35pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

25 Jun - 1 Jul

$38pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

Non-stop flights to USA from Ontario

Save time with Ontario to USA direct flight deals

7 Jun - 8 Jun

$35pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

25 Jun - 1 Jul

$38pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

8 Jun - 15 Jun

$40pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

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

31 May - 7 Jun

$40pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

31 May - 1 Jun

$41pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

31 May - 7 Jun

$43pp

ONT

Ontario

Frontier

Non-Stop

LAS

Las Vegas Harry Reid Intl

LAS

Las Vegas Harry Reid Intl

Frontier

Non-Stop

ONT

Ontario

One-way flights to USA from Ontario

The cheapest one-way flights from Ontario to USA

5:43 pm - 6:48 pm

Frontier

Nonstop

1h 05m

ONT - LAS

$17

Flights by SU

5:43 pm - 6:48 pm

Frontier

Nonstop

1h 05m

ONT - LAS

$18

Agoda.com

10:27 am - 11:33 am

Frontier

Nonstop

1h 06m

ONT - LAS

$19

Agoda.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?

Frontier, American Airlines, and Alaska 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 $35, but on average you can expect to pay $47.

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 $47.

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 - New York John F Kennedy Intl or Ontario - Honolulu, Ontario - Seattle/Tacoma Intl 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 $75 for a flight from Ontario to USA. The cheapest flight overall is $28 while the most popular route, (Ontario - Seattle/Tacoma Intl) is currently priced at $198.

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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 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) 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 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) 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 $358 pp

Flights from Ontario to Austin from $228 pp

Flights from Ontario to Baltimore from $395 pp

Flights from Ontario to Boston from $278 pp

Flights from Ontario to Charlotte from $370 pp

Flights from Ontario to Cincinnati from $307 pp

Flights from Ontario to Cleveland from $358 pp

Flights from Ontario to Dallas/Fort Worth from $186 pp

Flights from Ontario to Denver from $135 pp

Flights from Ontario to Detroit from $385 pp

Flights from Ontario to Dulles Intl from $436 pp

Flights from Ontario to Fort Lauderdale from $326 pp

Flights from Ontario to George Bush Intcntl from $237 pp

Flights from Ontario to Hobby from $237 pp

Flights from Ontario to Honolulu from $347 pp

Flights from Ontario to Indianapolis from $338 pp

Flights from Ontario to John F Kennedy Intl from $308 pp

Flights from Ontario to Kahului from $238 pp

Flights from Ontario to Kansas City from $337 pp

Flights from Ontario to LaGuardia from $282 pp

Flights from Ontario to Las Vegas from $43 pp

Flights from Ontario to Lihue from $298 pp

Flights from Ontario to Love Field from $474 pp

Flights from Ontario to Miami from $238 pp

Flights from Ontario to Midway from $326 pp

Flights from Ontario to Milwaukee from $253 pp

Flights from Ontario to Minneapolis from $266 pp

Flights from Ontario to Nashville from $333 pp

Flights from Ontario to New Orleans from $307 pp

Flights from Ontario to Newark from $278 pp

Flights from Ontario to O'Hare Intl from $309 pp

Flights from Ontario to Oakland from $157 pp

Flights from Ontario to Orlando from $188 pp

Flights from Ontario to Philadelphia from $372 pp

Flights from Ontario to Portland from $207 pp

Flights from Ontario to Reagan-National from $409 pp

Destination information for USA

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

1h 15m

Airports servicing Ontario

Ontario (ONT)

Airline	Cheapest	Average	Flexibility	On-time	COVID-19 safety
Juneyao Airlines	$12	$22	No cancel fee	66%	We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information.
Frontier	$30	$154	No cancel fee	62%
Alaska Airlines	$38	$360	No cancel fee	75%
JetBlue	$41	$270	No cancel fee	62%
Tunisair	$49	$55	No cancel fee	36%	We couldn't confirm the COVID-19 safety measures taken by Tunisair. Please check directly on their website for additional information.
Delta	$78	$359	No cancel fee	N/A
United Airlines	$93	$285	No cancel fee	69%
American Airlines	$107	$379	No cancel fee	71%
Spirit Airlines	$129	$418	No cancel fee	65%