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$124+ Cheap flights from LaGuardia, NY (LGA) to Ontario (ONT)

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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
LGA — ONT
Jul 12 — Jul 191
Sat 7/12
Sat 7/19
1 adult, Economy
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Cheap flight deals from LaGuardia to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from LaGuardia (LGA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 7, 2025.

Round-trip from

$221
(Southwest)

One-way from

$124
(Southwest)

Popular in

December

Cheapest in

September

Average price

$397
From New York LaGuardia to Ontario
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One-way flight from New York LaGuardia to Ontario
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Highest demand for flights based on searches. 11% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from LaGuardia to Ontario

Cheapest flights from LaGuardia to Ontario
Explore the most affordable flight options available from LaGuardia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 7, 2025.

This Southwest deal was found by Cheapflights users on 7/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/86:25 amLGA - ONT
1 stop13h 05mSouthwest
Tue 11/118:55 pmONT - LGA
2 stops9h 05mSouthwest
Deal found 7/7$177
This American Airlines deal was found by Cheapflights users on 7/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/51:00 pmLGA - ONT
1 stop8h 54mAmerican Airlines
Sun 9/711:59 pmONT - LGA
1 stop10h 00mAmerican Airlines
Deal found 7/7$201
This FlightHub deal was found by Cheapflights users on 7/7. 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.
Tue 7/2910:55 pmLGA - ONT
1 stop13h 14mFrontier
Wed 7/3012:59 amONT - LGA
1 stop18h 10mFrontier
Deal found 7/7$265
This Delta deal was found by Cheapflights users on 7/7. 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.
Wed 8/135:00 pmLGA - ONT
1 stop8h 20mDelta
Mon 8/1810:00 pmONT - LGA
1 stop7h 15mDelta
Deal found 7/7$277

Cheapflights Fare Finder

Customize your flight search to find flights from LaGuardia to Ontario 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 2,558,603 searches. Data last updated July 7, 2025.
Use the filters below to find and compare flights from New York LaGuardia Airport to Ontario that are best for you.

Fly from

LaGuardia

Fly to

Ontario

Route

Depart

Return

Price

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Sat 11/8

6:25 am-4:30 pm

1 stop13h 05m

Ontario

Tue 11/11

8:55 pm-9:00 am

2 stops9h 05m

$177

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Fri 9/5

1:00 pm-6:54 pm

1 stop8h 54m

Ontario

Sun 9/7

11:59 pm-12:59 pm

1 stop10h 00m

$201

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Tue 7/29

10:55 pm-9:09 am

1 stop13h 14m

Ontario

Wed 7/30

12:59 am-10:09 pm

1 stop18h 10m

$265

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 8/13

5:00 pm-10:20 pm

1 stop8h 20m

Ontario

Mon 8/18

10:00 pm-8:15 am

1 stop7h 15m

$277

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Fri 8/22

6:30 am-12:40 pm

2 stops9h 10m

$124

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Tue 7/29

10:55 pm-9:09 am

1 stop13h 14m

$129

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 8/20

7:30 am-11:52 am

1 stop7h 22m

$140

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 8/20

4:20 pm-11:40 pm

2 stops10h 20m

$144

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Mon 8/18

3:25 pm-10:06 pm

1 stop9h 41m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Best time to book a flight from LaGuardia to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from LaGuardia 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.

Cheapflights Insights

Everything you need to know about your flight from New York LaGuardia Airport to Ontario

What is the cheapest month to book a flight from New York LaGuardia Airport to Ontario?

Currently, August is the cheapest month in which you can book a flight from New York LaGuardia Airport to Ontario (average of $246). Flying from New York LaGuardia Airport to Ontario in March is currently the most expensive (average of $328). 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 LGA to ONT?

Find hourly flight availability from LaGuardia to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 7, 2025.

When flying from New York LaGuardia Airport to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 32% versus a flight in the afternoon.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 7, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from New York LaGuardia Airport to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,257 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.0
Very good
4,257 reviews
Southwest
8.0
Very good
4,257 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,962 reviews
Southwest
8.0
Very good
4,257 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,844 reviews
Southwest
8.0
Very good
4,257 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,257 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Frontier
5.9
Fair
3,275 reviews
Southwest
8.0
Very good
4,257 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Related info for your journey

Find useful and relevant information for your journey from LaGuardia to Ontario. 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 into for flights to Ontario from New York LaGuardia?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Ontario from New York LaGuardia. Booking flights from New York LaGuardia to Ontario (ONT) should be relatively easy as there are 0 daily inbound flights from New York LaGuardia from 5 different airlines.

  • What are the cheapest airlines flying from New York LaGuardia Airport to Ontario round-trip?

    Southwest, at $221, was found to be the cheapest airline from New York LaGuardia Airport to Ontario.Alternate airlines to your destination round-trip include Frontier and Delta. Southwest is currently priced 41% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from New York LaGuardia Airport to Ontario one-way?

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $124. However, be on the lookout for offers from Frontier and American Airlines, as they are both options that can get you from New York LaGuardia Airport to Ontario for a low price.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from New York LaGuardia Airport to Ontario?

    Currently, August is the cheapest month in which you can book a flight from New York LaGuardia Airport to Ontario (average of $246). Flying from New York LaGuardia Airport to Ontario in March is currently the most expensive (average of $328). 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 LaGuardia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from LaGuardia to Ontario

Discover the top 5 airlines that operate flights from LaGuardia to Ontario. 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 2,558,603 searches. Data last updated July 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$153Average$290FlexibilityNo cancel feeOn-time62%
DeltaCheapest$256Average$378FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$266Average$396FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$278Average$610FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$286Average$447FlexibilityNo cancel feeOn-time63%

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