Cheap flights from Ontario (ONT) to USA

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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 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
Frontier
$17
Flights by SU
5:43 pm - 6:48 pm
Frontier
Nonstop
1h 05m
ONT - LAS
Frontier
$18
Agoda.com
10:27 am - 11:33 am
Frontier
Nonstop
1h 06m
ONT - LAS
Frontier
$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.

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.
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Destination information for USA

Things to know before you go - useful duration and weather info for your trip from Ontario to USA.
Flight duration from ONT to United States
1h 15m

Airports servicing Ontario

Top 9 airlines flying from Ontario to USA

The chart below displays the airlines Cheapflights users traveling from Ontario to USA choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
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%
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