Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from North America to Los Angeles from $42

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from North America to Los Angeles departing on 1/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from North America to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
9:45 pm - 11:24 pm
DEN
-
ONT
2h 39mnonstop
Frontier Logo
6:20 am - 9:40 am
ONT
-
DEN
2h 20mnonstop
$71Frontier
Sat, Jan 24 - Mon, Jan 26
Frontier Logo
9:45 pm - 11:24 pm
DEN
-
ONT
2h 39mnonstop
Frontier Logo
6:20 am - 9:40 am
ONT
-
DEN
2h 20mnonstop
$72Frontier
Sat, Jan 24 - Sun, Feb 8
Alaska Airlines Logo
6:00 pm - 8:36 pm
SEA
-
ONT
2h 36mnonstop
Alaska Airlines Logo
11:53 am - 2:44 pm
ONT
-
SEA
2h 51mnonstop
$128Alaska Airlines
Wed, Jan 21 - Sat, Jan 31
Alaska Airlines Logo
8:15 am - 10:59 am
SEA
-
ONT
2h 44mnonstop
Alaska Airlines Logo
4:03 pm - 6:54 pm
ONT
-
SEA
2h 51mnonstop
$129Alaska Airlines
Sun, Feb 1 - Tue, Feb 10
Delta Logo
5:30 am - 12:23 pm
SEA
-
ONT
6h 53m1 stop
Delta Logo
5:09 pm - 12:03 am
ONT
-
SEA
6h 54m1 stop
$139Delta
Sat, Mar 14 - Wed, Mar 18
American Airlines Logo
9:00 am - 4:05 pm
JFK
-
ONT
10h 05m2 stops
American Airlines Logo
11:59 pm - 1:59 pm
ONT
-
JFK
11h 00m2 stops
$227American Airlines
Tue, Jan 27 - Thu, Feb 5
American Airlines Logo
11:21 am - 6:20 pm
JFK
-
ONT
9h 59m2 stops
American Airlines Logo
11:59 pm - 1:29 pm
ONT
-
JFK
10h 30m2 stops
$229American Airlines
Tue, Feb 10 - Tue, Feb 24
Southwest Logo
12:10 pm - 1:45 pm
HOU
-
ONT
3h 35mnonstop
Southwest Logo
2:50 pm - 7:45 pm
ONT
-
HOU
2h 55mnonstop
$333Southwest
Sat, Feb 14 - Sat, Mar 7
Southwest Logo
8:00 am - 9:35 am
HOU
-
ONT
3h 35mnonstop
Southwest Logo
10:40 am - 8:25 pm
ONT
-
HOU
7h 45m1 stop
$343Southwest
Thu, Feb 5 - Mon, Feb 9
Delta Logo
5:45 am - 11:31 am
HOU
-
ONT
7h 46m1 stop
Delta Logo
10:30 pm - 10:21 am
ONT
-
HOU
9h 51m1 stop
$353Delta
Sat, Jan 24 - Sat, Feb 7

Frontier flights from North America to Ontario

Our best Frontier deals on North America to Ontario flight tickets
Frontier
Jan 24
DEN9:45 pmDenver Intl
2h 39m
ONT11:24 pmOntario
Jan 26
ONT6:20 amOntario
2h 20m
DEN9:40 amDenver Intl
$71
Find similar
Frontier
Jan 24
DEN9:45 pmDenver Intl
2h 39m
ONT11:24 pmOntario
Feb 8
ONT6:20 amOntario
2h 20m
DEN9:40 amDenver Intl
$72
Find similar
Frontier
Jan 27
DEN1:34 pmDenver Intl
2h 33m
ONT3:07 pmOntario
Jan 30
ONT6:20 amOntario
2h 20m
DEN9:40 amDenver Intl
$73
Find similar

Alaska Airlines flights from North America to Ontario

Our best Alaska Airlines deals on North America to Ontario flight tickets
Alaska Airlines
Jan 21
SEA6:00 pmSeattle/Tacoma Intl
2h 36m
ONT8:36 pmOntario
Jan 31
ONT11:53 amOntario
2h 51m
SEA2:44 pmSeattle/Tacoma Intl
$128
Find similar
Alaska Airlines
Feb 1
SEA8:15 amSeattle/Tacoma Intl
2h 44m
ONT10:59 amOntario
Feb 10
ONT4:03 pmOntario
2h 51m
SEA6:54 pmSeattle/Tacoma Intl
$129
Find similar
Alaska Airlines
Jan 21
SEA6:00 pmSeattle/Tacoma Intl
2h 36m
ONT8:36 pmOntario
Jan 28
ONT4:03 pmOntario
2h 51m
SEA6:54 pmSeattle/Tacoma Intl
$138
Find similar

momondo Fare Finder

 
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, momondo users made 832,500 searches. Data last updated December 25, 2025.
Use the filters below to find and compare flights from North America to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverOntario

DEN - ONT

DENONT

Denver Intl

Sat 1/24

9:45 pm-11:24 pm

Nonstop2h 39m

Ontario

Mon 1/26

6:20 am-9:40 am

Nonstop2h 20m

$71

DenverOntario

DEN - ONT

DENONT

Denver Intl

Sat 1/24

9:45 pm-11:24 pm

Nonstop2h 39m

Ontario

Sun 2/8

6:20 am-9:40 am

Nonstop2h 20m

$72

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Wed 1/21

6:00 pm-8:36 pm

Nonstop2h 36m

Ontario

Sat 1/31

11:53 am-2:44 pm

Nonstop2h 51m

$128

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Sun 2/1

8:15 am-10:59 am

Nonstop2h 44m

Ontario

Tue 2/10

4:03 pm-6:54 pm

Nonstop2h 51m

$129

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Sat 3/14

5:30 am-12:23 pm

1 stop6h 53m

Ontario

Wed 3/18

5:09 pm-12:03 am

1 stop6h 54m

$139

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Tue 1/27

9:00 am-4:05 pm

2 stops10h 05m

Ontario

Thu 2/5

11:59 pm-1:59 pm

2 stops11h 00m

$227

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Tue 2/10

11:21 am-6:20 pm

2 stops9h 59m

Ontario

Tue 2/24

11:59 pm-1:29 pm

2 stops10h 30m

$229

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Sat 2/14

12:10 pm-1:45 pm

Nonstop3h 35m

Ontario

Sat 3/7

2:50 pm-7:45 pm

Nonstop2h 55m

$333

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Thu 2/5

8:00 am-9:35 am

Nonstop3h 35m

Ontario

Mon 2/9

10:40 am-8:25 pm

1 stop7h 45m

$343

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Sat 1/24

5:45 am-11:31 am

1 stop7h 46m

Ontario

Sat 2/7

10:30 pm-10:21 am

1 stop9h 51m

$353

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Los Angeles from

How to get the cheapest flight ticket from North America to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Ontario?

In general, September is the cheapest month to fly from North America to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $287. If you aren’t able to travel during the month of September, then book flights to Ontario from North America during October instead. Flights to Ontario in October, while not as cheap as those in September, still average around $287.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Friday when prices can be found for as low as $302. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from North America to Ontario for around $387.

What is the cheapest time of day to depart on your flight to Ontario?

At noon is the cheapest time of day to fly from North America to Ontario when you can find flight prices for as low as $334. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $362 on average. Flights to Ontario from North America in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest North America to Ontario flight route?

Fly from San Francisco to Ontario for the best North America - Ontario flight prices

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from North America when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $354 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from North America for as low as $270 on momondo.

What cabin class options are available on North America to Ontario flights?

There are 4 cabin classes available to choose from on North America to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on North America to Ontario flights?

No. A direct flight is the cheapest option for a flight between North America to Ontario.

Cheap North America to Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from North America to Ontario

Best Price Found

$73

Fastest flight time

1h 00m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from North America in the past 72 hours is $73. The best round-trip flight deal from North America to Ontario found on momondo in the last 72 hours is $80.
The fastest flight from North America to Ontario takes 1h 00m
Direct flights go from North America to Ontario every day.
There is 1 airport in Ontario. From North America there are direct flights to Ontario (ONT).
Search flight deals

  • When did momondo last update prices for flights from North America to Ontario Airport?

    Prices for flights from North America to Ontario Airport refresh daily.

  • How many operators does momondo search for flights from North America to Ontario Airport?

  • How old do you have to be to fly from North America to Ontario Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from North America to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from North America to Ontario?

Best airlines flying from North America to Ontario

Compare and see reviews for airlines that fly from North America to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $38Free CancellationRating
5.8
3,070 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $44Free CancellationRating
6.3
8,202 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $58Free CancellationRating
7.4
9,115 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $59Free CancellationRating
8.0
11,533 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $84Free CancellationRating
8.0
4,258 reviews
Search Southwest flights
DeltaPriceFrom $108Free CancellationRating
7.9
8,012 reviews
Search Delta flights
American AirlinesPriceFrom $186Free CancellationRating
7.2
11,060 reviews
Search American Airlines flights
JetBluePriceFrom $250Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
VolarisPriceFrom $316Free CancellationRating
6.6
1,165 reviews
Search Volaris flights

Why use momondo?

Why should I use momondo to find a flight deal from North America to Ontario?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from North America to Ontario. momondo saves you time and could save you money on your trip.

Can I find flights from North America to Ontario with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ontario from North America with this policy.

How can momondo help me find flights from North America to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from North America.

I’m not ready to book a flight from North America to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from North America. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 1/24
Sat 1/31
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States