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Ontario

$34+ Cheap flights from North America 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Dec 7 — Dec 141
Sat 12/7
Sat 12/14
1 adult, Economy
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Cheap flight deals from North America to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from North America (0NA) 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 December 2, 2024.

Find flight deals from North America to Ontario

Cheapest flights from North America to Ontario
Explore the most affordable flight options available from North America to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 2, 2024.

This Cheapflightsfares deal was found by Cheapflights users on 12/1. 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 12/159:59 pmSFO - ONT
Nonstop1h 24mFrontier
Thu 12/197:47 pmONT - SFO
Nonstop1h 31mFrontier
Deal found 12/1$57
This Cheapflightsfares deal was found by Cheapflights users on 12/2. 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 12/1210:15 pmDEN - ONT
Nonstop2h 29mFrontier
Mon 12/1612:59 amONT - DEN
Nonstop2h 23mFrontier
Deal found 12/2$72
This Cheapflightsfares deal was found by Cheapflights users on 12/2. 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.
Tue 12/317:01 pmSEA - ONT
Nonstop2h 38mFrontier
Sun 1/1211:18 amONT - SEA
Nonstop2h 59mFrontier
Deal found 12/2$106
This Frontier deal was found by Cheapflights users on 11/30. 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.
Sat 12/146:35 amDFW - ONT
1 stop10h 31mFrontier
Fri 1/109:28 pmONT - DFW
1 stop5h 12mFrontier
Deal found 11/30$118
This CheapOair deal was found by Cheapflights users on 12/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/187:52 pmIAH - ONT
1 stop18h 37mFrontier
Thu 12/2610:31 pmONT - IAH
1 stop13h 02mFrontier
Deal found 12/1$118
This FlightHub deal was found by Cheapflights users on 12/1. 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.
Thu 12/198:34 pmORD - ONT
1 stop12h 35mFrontier
Thu 1/168:11 pmONT - ORD
1 stop26h 21mFrontier
Deal found 12/1$133
This Frontier deal was found by Cheapflights users on 12/1. 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.
Mon 12/910:36 amHOU - ONT
1 stop13h 05mFrontier
Wed 12/117:45 amONT - HOU
1 stop7h 41mFrontier
Deal found 12/1$140
This CheapOair deal was found by Cheapflights users on 12/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/117:59 amJFK - ONT
1 stop30h 49mFrontier
Sat 12/147:58 pmONT - JFK
1 stop7h 32mFrontier
Deal found 12/1$190
This Alaska Airlines deal was found by Cheapflights users on 12/2. 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.
Mon 12/309:21 pmSEA - ONT
Nonstop2h 38mAlaska Airlines
Mon 1/1311:33 amONT - SEA
Nonstop2h 51mAlaska Airlines
Deal found 12/2$197
This FlightHub deal was found by Cheapflights users on 12/1. 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.
Wed 12/1110:00 pmLGA - ONT
1 stop12h 56mFrontier
Thu 1/239:02 amONT - LGA
1 stop9h 00mFrontier
Deal found 12/1$198
This Expedia deal was found by Cheapflights users on 12/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/115:28 pmSEA - ONT
Nonstop2h 32mMultiple Airlines
Sun 12/1511:09 amONT - SEA
Nonstop3h 00mMultiple Airlines
Deal found 12/1$213
This United Airlines deal was found by Cheapflights users on 12/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:00 amSEA - ONT
1 stop4h 58mUnited Airlines
Tue 1/710:47 amONT - SEA
1 stop4h 58mUnited Airlines
Deal found 12/2$246

Find flights from North America to Ontario within your budget

Customize your flight search to find flights from North America 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 2,650,959 searches. Data last updated December 2, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

San FranciscoOntario

SFO - ONT

SFOONT

San Francisco

Sun 2/2

9:59 pm-11:24 pm

Nonstop1h 25m

Ontario

Thu 2/13

8:26 am-10:02 am

Nonstop1h 36m

$54

DenverOntario

DEN - ONT

DENONT

Denver Intl

Thu 2/20

10:37 pm-12:09 am

Nonstop2h 32m

Ontario

Sun 3/2

5:13 pm-8:35 pm

Nonstop2h 22m

$71

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Sun 2/16

1:36 pm-4:13 pm

Nonstop2h 37m

Ontario

Fri 2/21

11:25 am-2:16 pm

Nonstop2h 51m

$106

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Sat 1/11

10:00 am-5:04 pm

1 stop7h 04m

Ontario

Mon 1/13

6:00 am-8:54 am

Nonstop2h 54m

$115

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Tue 1/21

7:45 pm-10:32 pm

Nonstop2h 47m

Ontario

Tue 1/28

6:00 am-8:55 am

Nonstop2h 55m

$117

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

Sat 2/22

7:36 pm-12:09 am

1 stop6h 33m

Ontario

Sat 3/1

7:58 pm-12:56 am

Nonstop2h 58m

$117

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 1/18

7:10 pm-7:11 am

1 stop14h 01m

Ontario

Tue 1/21

7:45 am-12:14 pm

1 stop26h 29m

$118

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Wed 1/8

6:18 pm-10:26 am

1 stop18h 08m

Ontario

Wed 1/15

7:45 am-5:28 pm

1 stop7h 43m

$118

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Thu 2/13

1:36 pm-4:13 pm

Nonstop2h 37m

Ontario

Sun 2/16

7:00 am-11:27 am

1 stop4h 27m

$131

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Thu 12/19

8:34 pm-7:09 am

1 stop12h 35m

Ontario

Thu 1/16

8:11 pm-12:32 am

1 stop26h 21m

$133

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

Showing 1-10 of 60 results
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Best time to book a flight from North America to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from North America 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 North America to Ontario

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

What is the cheapest month to book a flight from North America to Ontario?

Currently, September is the cheapest month in which you can book a flight from North America to Ontario (average of $236). Flying from North America to Ontario in December is currently the most expensive (average of $298). 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 NA to ONT?

Find hourly flight availability from North America 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 December 2, 2024.

When flying from North America to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 December 2, 2024.
Southwest
8.1
Very good
4,951 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Southwest
8.1
Very good
4,951 reviews
Southwest
8.1
Very good
4,951 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Alaska Airlines
8.0
Very good
9,513 reviews
Southwest
8.1
Very good
4,951 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Delta
8.0
Very good
8,698 reviews
Southwest
8.1
Very good
4,951 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

United Airlines
7.4
Good
9,141 reviews
Southwest
8.1
Very good
4,951 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,951 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Crew

8.7

Food

7.2

Reviews

1 / 10

My first time, surprisingly good! It was a good ride overall. Coming from Singapore, this budget flight is better than the budget airline for our national carrier Singapore Airlines.

Related info for your journey

Find useful and relevant information for your journey from North America 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 North America?

    If you book a flight to Ontario from North America, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • What are the cheapest airlines to fly from North America to Ontario one-way?

    The cheapest airlines for a one-way flight from North America to Ontario are Frontier ($35), Alaska Airlines ($59), and Delta ($69).

  • What are the most popular routes from North America to Ontario?

    The most popular flight routes from North America to Ontario are Seattle/Tacoma Intl - Ontario, Dallas/Fort Worth - Ontario and Newark - Ontario.

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

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

  • How can I find direct flights from North America to Ontario?

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

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

    Yes. Cheapflights offers flight deals from North America 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 North America to Ontario?

    Currently, September is the cheapest month in which you can book a flight from North America to Ontario (average of $236). Flying from North America to Ontario in December is currently the most expensive (average of $298). 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 North America to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from North America to Ontario

Discover the top 9 airlines that operate flights from North America 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 2,650,959 searches. Data last updated December 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$27Average$196FlexibilityNo cancel feeOn-time65%
FrontierCheapest$38Average$219FlexibilityNo cancel feeOn-time62%
DeltaCheapest$45Average$360FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$55Average$185FlexibilityNo cancel feeOn-time75%
Breeze AirwaysCheapest$78Average$129FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$138Average$481FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$186Average$398FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$201Average$380FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$216Average$408FlexibilityNo cancel feeOn-time71%
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