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$29+ Cheap flights from Ontario (ONT) to the United States

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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Nov 5 — Nov 121
1 adult
Tue 11/5
Tue 11/12
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Find flight deals from Ontario to USA

Cheapest flights from Ontario to USA
Explore the most affordable flight options available from Ontario to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 31, 2024.

This Cheapflightsfares deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1710:58 pmONT - LAS
Nonstop1h 01mFrontier
Fri 11/228:00 amLAS - ONT
Nonstop1h 04mFrontier
Deal found 10/31$46
This Cheapflightsfares deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/163:41 pmONT - SFO
Nonstop1h 27mFrontier
Sun 11/178:05 amSFO - ONT
Nonstop1h 25mFrontier
Deal found 10/29$50
This Cheapflightsfares deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/217:58 amONT - SEA
Nonstop2h 56mFrontier
Fri 11/226:35 pmSEA - ONT
Nonstop2h 40mFrontier
Deal found 10/31$77
This FlightHub deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1510:58 pmONT - DFW
1 stop4h 50mFrontier
Tue 11/198:57 pmDFW - ONT
Nonstop3h 20mFrontier
Deal found 10/31$113
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/55:40 amONT - SEA
Nonstop3h 00mDelta
Mon 12/97:55 pmSEA - ONT
Nonstop2h 47mDelta
Deal found 10/31$117
This Frontier deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1412:32 pmONT - ORD
1 stop9h 40mFrontier
Sun 11/179:27 pmORD - ONT
1 stop12h 09mFrontier
Deal found 10/30$128
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/164:07 pmONT - HOU
1 stop18h 19mFrontier
Sat 11/232:53 pmHOU - ONT
1 stop11h 05mFrontier
Deal found 10/30$128
This Orbitz deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/299:54 amONT - SEA
Nonstop2h 56mMultiple Airlines
Fri 12/69:26 pmSEA - ONT
Nonstop2h 33mMultiple Airlines
Deal found 10/31$146
This eDestinos deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/210:05 pmONT - DFW
1 stop9h 47mMultiple Airlines
Thu 12/56:15 amDFW - ONT
1 stop5h 24mMultiple Airlines
Deal found 10/30$149
This Alaska Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/188:52 pmONT - SEA
Nonstop2h 52mAlaska Airlines
Tue 1/710:00 amSEA - ONT
1 stop7h 04mAlaska Airlines
Deal found 10/30$156
This FlightHub deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/164:07 pmONT - LGA
1 stop16h 32mFrontier
Mon 11/1812:29 pmLGA - ONT
1 stop14h 14mFrontier
Deal found 10/30$158
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1810:58 pmONT - JFK
1 stop28h 32mFrontier
Thu 11/217:59 amJFK - ONT
1 stop28h 05mFrontier
Deal found 10/30$158

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 2,570,725 searches. Data last updated October 31, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 12/18

2:33 pm-3:45 pm

Nonstop1h 12m

$32

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Thu 12/12

6:00 am-8:53 am

Nonstop2h 53m

$59

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Fri 2/28

7:36 am-9:02 am

Nonstop1h 26m

$32

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 11/20

5:25 pm-8:27 pm

Nonstop3h 02m

$69

OntarioDallas

ONT - DFW

ONTDFW

Ontario

Wed 11/6

9:26 am-12:12 am

1 stop12h 46m

$77

OntarioDallas

ONT - DFW

ONTDFW

Ontario

Tue 2/4

6:05 am-11:07 am

Nonstop3h 02m

$80

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Wed 12/4

8:35 am-1:35 pm

Nonstop3h 00m

$89

OntarioDallas

ONT - DFW

ONTDFW

Ontario

Tue 11/19

5:45 am-10:47 am

Nonstop3h 02m

$44

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Mon 11/25

6:00 am-11:53 am

1 stop5h 53m

$98

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Mon 1/27

9:35 am-1:50 pm

Nonstop6h 15m

$111

Flights are sorted by cheapest first

Deals found on 10/31

Showing 1-10 of 60 results
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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.

Travel insights for flights from Ontario to USA

Get recent, data-driven insights about flights from Ontario to USA including ideal travel times, pricing trends, and more.

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 $240). Flying from Ontario to USA in July is currently the most expensive (average of $322). 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.

What is the cheapest time of day to fly from ONT to US?

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 October 31, 2024.

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.

Rainfall in USA by month

Plan your trip to USA by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in USA ranges from 2.8 - 4.5 inches per month. July is typically the wettest month, when rainfall can reach 4.5 in. February is typically the driest time to visit USA when rainfall is around 2.8 in.

Temperature in USA by month

Plan your trip to USA by taking into account the average temperature totals by month.

If weather is an important factor for your trip to USA, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

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 October 31, 2024.
Peruse reviews from past customers who have flown with United Airlines, Alaska Airlines and Frontier 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.
Southwest
8.1
Very good
5,116 reviews

Boarding

8.3

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,116 reviews
Southwest
8.1
Very good
5,116 reviews

Boarding

8.3

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,420 reviews
Southwest
8.1
Very good
5,116 reviews

Boarding

8.3

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,835 reviews
Southwest
8.1
Very good
5,116 reviews

Boarding

8.3

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Hawaiian Airlines
7.9
Good
2,303 reviews
Southwest
8.1
Very good
5,116 reviews

Boarding

8.3

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,240 reviews
Southwest
8.1
Very good
5,116 reviews

Boarding

8.3

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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 $36, but on average you can expect to pay $145.

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

    Cheapflights has at least 13 direct flights from Ontario to USA under $100. A good price for a nonstop flight from Ontario to USA is less than $158.

  • 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 cheapest airlines to fly from Ontario to USA one-way?

    $29 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Alaska Airlines and American Airlines, with prices starting from $59 and $80, respectively.

  • 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: Miami Airport (MIA), San Francisco Airport (SFO), Boston Logan Intl Airport (BOS), New York John F Kennedy Intl Airport (JFK), Las Vegas Harry Reid Intl Airport (LAS).

  • 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 10/31.

  • 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 $240). Flying from Ontario to USA in July is currently the most expensive (average of $322). 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.

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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 10 airlines flying from Ontario to USA

Discover the top 10 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 2,570,725 searches. Data last updated October 31, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$36Average$179FlexibilityNo cancel feeOn-time65%
FrontierCheapest$38Average$193FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$38Average$237FlexibilityNo cancel feeOn-time75%
DeltaCheapest$55Average$343FlexibilityNo cancel feeOn-timeN/A
Breeze AirwaysCheapest$78Average$147FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$78Average$366FlexibilityNo cancel feeOn-time62%
Ravn AlaskaCheapest$86Average$138FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$135Average$427FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$157Average$360FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$197Average$416FlexibilityNo cancel feeOn-time71%
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