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Cheap flights from Ontario (ONT) to the United States from $37

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — LAX
Jun 14 — Jun 211
From?
To?
Fri 6/14
Fri 6/21
1 adult, Economy
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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 31 days in advance, which can save you up to 71% on flights from Ontario to USA compared to booking the week you need them. Waiting 31 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 $398. For sooner than that we have options available in the next 3 days from $545.

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

September can be a great time to fly to USA from Ontario with a flight ticket averaging about $351. Cheapflights users have found deals in the month of September for as cheap as $119. The most expensive prices can be found in the month of December.

What is the cheapest time of day to fly from ONT to 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.

Cheap Ontario to USA flights in June & July 2024

Find cheap flight options from Ontario to USA specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,020,828 searches. Prices were last updated on June 9, 2024.
The lowest fares we've come across on flights traveling from Ontario to USA in June and July 2024. More deals are always being added, so be sure to check back regularly.
Tue 7/95:32 pmONT - LAS
Nonstop1h 14mFrontier
Tue 8/208:00 amLAS - ONT
Nonstop1h 06mFrontier
Deal found 6/7$43
Tue 6/257:26 pmONT - LAS
Nonstop1h 06mFrontier
Sat 6/297:41 amLAS - ONT
Nonstop1h 03mFrontier
Deal found 6/8$46
Tue 6/187:59 amONT - SFO
Nonstop1h 27mFrontier
Wed 6/195:45 amSFO - ONT
Nonstop1h 23mFrontier
Deal found 6/8$46
Tue 7/27:26 pmONT - LAS
Nonstop1h 06mFrontier
Sat 7/132:27 pmLAS - ONT
Nonstop1h 09mFrontier
Deal found 6/9$48
Tue 7/28:09 amONT - SFO
Nonstop1h 28mFrontier
Tue 7/95:45 amSFO - ONT
Nonstop1h 22mFrontier
Deal found 6/8$48
Sat 7/207:46 pmONT - LAS
Nonstop1h 14mFrontier
Tue 7/238:00 amLAS - ONT
Nonstop1h 03mFrontier
Deal found 6/8$49
Wed 7/310:55 pmONT - LAS
Nonstop1h 15mFrontier
Sat 7/67:41 amLAS - ONT
Nonstop1h 03mFrontier
Deal found 6/9$50
Wed 7/178:07 amONT - SFO
Nonstop1h 26mFrontier
Tue 7/235:45 amSFO - ONT
Nonstop1h 22mFrontier
Deal found 6/8$50
Sat 6/227:15 pmONT - LAS
Nonstop1h 06mFrontier
Sun 6/236:00 amLAS - ONT
Nonstop1h 03mFrontier
Deal found 6/8$51

Ontario to USA 2024 flight deals

Discover exclusive flight deals for travel between Ontario and USA in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,020,828 searches. Data last updated June 9, 2024.
The lowest fares we've come across on flights traveling from Ontario to USA in June and July 2024. More deals are always being added, so be sure to check back regularly.
Wed 8/710:30 pmONT - LAS
Nonstop1h 29mFrontier
Tue 8/1311:38 amLAS - ONT
Nonstop1h 09mFrontier
Deal found 6/9$38
Sat 8/241:10 pmONT - LAS
Nonstop1h 21mFrontier
Thu 8/2912:53 pmLAS - ONT
Nonstop1h 09mFrontier
Deal found 6/8$39
Wed 8/75:16 pmONT - LAS
Nonstop1h 14mFrontier
Tue 8/1311:38 amLAS - ONT
Nonstop1h 09mFrontier
Deal found 6/7$40
Wed 9/115:30 pmONT - LAS
Nonstop1h 13mFrontier
Sat 9/218:00 amLAS - ONT
Nonstop1h 06mFrontier
Deal found 6/8$41
Tue 8/67:16 pmONT - LAS
Nonstop1h 14mFrontier
Thu 8/156:00 amLAS - ONT
Nonstop1h 08mFrontier
Deal found 6/9$42
Sat 8/248:35 pmONT - LAS
Nonstop1h 19mFrontier
Mon 8/262:46 pmLAS - ONT
Nonstop1h 09mFrontier
Deal found 6/8$43
Thu 8/225:30 pmONT - LAS
Nonstop1h 13mFrontier
Wed 8/288:00 amLAS - ONT
Nonstop1h 06mFrontier
Deal found 6/8$44
Sun 8/1811:22 pmONT - LAS
Nonstop1h 18mFrontier
Wed 8/2112:15 pmLAS - ONT
Nonstop1h 07mFrontier
Deal found 6/8$45
Tue 6/257:26 pmONT - LAS
Nonstop1h 06mFrontier
Sat 6/297:41 amLAS - ONT
Nonstop1h 03mFrontier
Deal found 6/8$46

Ontario to USA flights leaving soon

Find last-minute flight options from Ontario to USA for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,020,828 searches. Data last updated June 9, 2024.
Have a look at some of the flights available from Ontario to USA departing last-minute. Tip: verify your flight details before completing your reservation.
Wed 6/198:09 amONT - SFO
Nonstop1h 28mFrontier
Sun 6/235:45 amSFO - ONT
Nonstop1h 23mFrontier
Deal found 6/8$66
Tue 6/187:59 amONT - SFO
Nonstop1h 27mFrontier
Sun 6/235:45 amSFO - ONT
Nonstop1h 23mFrontier
Deal found 6/9$68
Sun 6/169:20 pmONT - LAS
Nonstop1h 13mFrontier
Fri 6/2112:04 pmLAS - ONT
Nonstop1h 10mFrontier
Deal found 6/9$70
Mon 6/177:59 amONT - SFO
Nonstop1h 27mFrontier
Tue 6/185:45 amSFO - ONT
Nonstop1h 23mFrontier
Deal found 6/8$70
Mon 6/177:59 amONT - SFO
Nonstop1h 27mFrontier
Fri 6/215:45 amSFO - ONT
Nonstop1h 23mFrontier
Deal found 6/9$73
Sat 6/159:15 pmONT - LAS
Nonstop1h 13mFrontier
Tue 6/187:56 amLAS - ONT
Nonstop1h 03mFrontier
Deal found 6/9$74
Mon 6/177:59 amONT - SFO
Nonstop1h 27mFrontier
Thu 6/205:45 amSFO - ONT
Nonstop1h 23mFrontier
Deal found 6/9$75
Wed 6/198:09 amONT - SFO
Nonstop1h 28mFrontier
Mon 6/245:45 amSFO - ONT
Nonstop1h 23mFrontier
Deal found 6/7$76
Mon 6/1712:59 amONT - DEN
Nonstop2h 20mFrontier
Tue 6/256:05 amDEN - ONT
Nonstop2h 22mFrontier
Deal found 6/9$76

One-way flights to USA from Ontario

Search for one-way flight options from Ontario to USA. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,020,828 searches. Data last updated June 9, 2024.
Take a look at some of the one-way flights we've detected from Ontario to USA. Users can also find round-trip Ontario to USA flights by using the search form above.
Tue 8/276:57 amONT - DFW
Nonstop3h 14mFrontier
Deal found 6/8$37
Thu 8/89:52 pmONT - LAS
Nonstop1h 22mFrontier
Deal found 6/9$37
Mon 7/112:59 amONT - DEN
Nonstop2h 20mFrontier
Deal found 6/9$37
Thu 10/109:36 pmONT - LAS
Nonstop1h 24mFrontier
Deal found 6/8$38
Mon 6/1712:59 amONT - DEN
Nonstop2h 20mFrontier
Deal found 6/8$38
Sat 10/196:57 amONT - DFW
Nonstop3h 14mFrontier
Deal found 6/8$39
Fri 11/18:35 pmONT - LAS
Nonstop1h 19mFrontier
Deal found 6/9$39
Tue 7/910:08 amONT - SEA
Nonstop2h 36mFrontier
Deal found 6/8$39
Sun 6/307:59 amONT - SFO
Nonstop1h 27mFrontier
Deal found 6/7$39

Find flights from Ontario to USA within your budget

Customize your flight search to find flights from Ontario to USA that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,020,828 searches. Data last updated June 9, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$38 - $144

Route

Depart

Return

Price

OntarioLas Vegas Harry Reid Intl

ONT - LAS

ONTLAS

Ontario

Wed 8/7

Nonstop1h 29m

Las Vegas Harry Reid Intl

Tue 8/13

Nonstop1h 09m

$38

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Wed 8/7

Nonstop1h 26m

San Francisco

Wed 8/7

Nonstop1h 23m

$38

OntarioLas Vegas Harry Reid Intl

ONT - LAS

ONTLAS

Ontario

Sat 8/24

Nonstop1h 21m

Las Vegas Harry Reid Intl

Thu 8/29

Nonstop1h 09m

$39

OntarioLas Vegas Harry Reid Intl

ONT - LAS

ONTLAS

Ontario

Wed 8/7

Nonstop1h 14m

Las Vegas Harry Reid Intl

Tue 8/13

Nonstop1h 09m

$40

OntarioLas Vegas Harry Reid Intl

ONT - LAS

ONTLAS

Ontario

Wed 9/11

Nonstop1h 13m

Las Vegas Harry Reid Intl

Sat 9/21

Nonstop1h 06m

$41

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 8/20

Nonstop1h 26m

San Francisco

Wed 8/28

Nonstop1h 21m

$41

OntarioLas Vegas Harry Reid Intl

ONT - LAS

ONTLAS

Ontario

Sat 8/24

Nonstop1h 21m

Las Vegas Harry Reid Intl

Sat 8/24

Nonstop1h 06m

$42

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Fri 9/6

Nonstop1h 27m

San Francisco

Sun 9/8

Nonstop1h 26m

$139

OntarioDallas/Fort Worth

ONT - DFW

ONTDFW

Ontario

Tue 9/3

Nonstop3h 14m

Dallas/Fort Worth

Tue 9/10

1 stop8h 35m

$144

Flights are sorted by cheapest first

Deals found on 6/9

No data available for this route at this time. Please check back soon.

Best time to book a flight from Ontario to USA

Have a flexible travel schedule? Discover the best time to fly to USA from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing USA

Get insights into the airlines that provide service to USA. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to USA. Reviews last updated June 9, 2024.
Peruse reviews from past customers who have flown with Frontier, United Airlines and CitizenPlane from Ontario to USA to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,245 reviews

Food

7.3

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,245 reviews
Alaska Airlines
8.1
Very good
9,245 reviews

Food

7.3

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.0
Very good
10,310 reviews
Alaska Airlines
8.1
Very good
9,245 reviews

Food

7.3

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Hawaiian Airlines
8.0
Very good
2,293 reviews
Alaska Airlines
8.1
Very good
9,245 reviews

Food

7.3

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

JetBlue
7.6
Good
4,288 reviews
Alaska Airlines
8.1
Very good
9,245 reviews

Food

7.3

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
10,661 reviews
Alaska Airlines
8.1
Very good
9,245 reviews

Food

7.3

Crew

8.6

Entertainment

7.3

Overall

8.1

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from Ontario to USA. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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.

  • 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 $38, but on average you can expect to pay $43.

  • 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 $43.

  • 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 - Dallas/Fort Worth or Ontario - New York John F Kennedy Intl, Ontario - Seattle/Tacoma Intl is the most popular route from Ontario to USA.

  • What does ONT to LAX mean?

    ONT stands for Ontario Airport, while LAX stands for Los Angeles Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Ready for more IATA code knowledge? These are related airports for your current travel destination: San Francisco Airport (SFO), Miami Airport (MIA), New York John F Kennedy Intl Airport (JFK), Boston Logan Intl Airport (BOS), Atlanta Hartsfield-Jackson Airport (ATL).

  • Can I find deals for flights from Ontario to USA that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to USA flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to USA with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to USA flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Ontario to USA that include hotel bookings?

    Yes. In addition to deals on Ontario to USA flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to USA?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to USA.

  • Can I find deals for business class flights from Ontario to USA?

    Yes. Cheapflights offers flight deals from Ontario to USA by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ontario to USA that allow pets onboard?

    Many airlines flying from Ontario to USA offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to USA?

    Yes, you can often find last-minute deals on Ontario to USA flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to USA flight deals updated?

    The Ontario to USA flight deals you see on this page were last updated on 6/9.

  • What is the cheapest month to book a flight from Ontario to USA?

    Currently, September is the cheapest month in which you can book a flight from Ontario to USA (average of $238). Flying from Ontario to USA in June is currently the most expensive (average of $324). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ontario to USA
See prices for flight routes from nearby airports that may be better suited for you.

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Top 9 airlines flying from Ontario to USA

Discover the top 9 airlines that operate flights from Ontario to USA. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,020,828 searches. Data last updated June 9, 2024.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$35Average$293FlexibilityNo cancel feeOn-time75%
Breeze AirwaysCheapest$36Average$166FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$37Average$163FlexibilityNo cancel feeOn-time65%
FrontierCheapest$38Average$168FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$39Average$245FlexibilityNo cancel feeOn-time62%
DeltaCheapest$45Average$300FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$48Average$375FlexibilityNo cancel feeOn-time69%
Ravn AlaskaCheapest$71Average$138FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$158Average$384FlexibilityNo cancel feeOn-time71%
Dallas to San Diego flights
Los Angeles to New Delhi flights
Phoenix to New York flights
San Francisco to New York John F Kennedy Intl Airport flights
New York to Dominican Republic flights
Austin to New Orleans flights
Houston to Nashville flights
Dallas to Atlanta flights
Los Angeles to Bangkok flights
Boston to Houston flights
Los Angeles to Baltimore flights
Ontario to Concord flights

Search flights from Ontario to USA by cabin class

Find flights from Ontario to USA, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Ontario to USA

Find hourly flight availability from Ontario to USA. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 9, 2024.
21%of flight departuresEarly morningMidnight to 6 am
38%of flight departuresMorning6 am to noon
21%of flight departuresAfternoonNoon to 6 pm
20%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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