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Cheap flights from the United States to Ontario from $30

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Ontario departing on 12/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from the United States to Los Angeles

Cheap round-trip flights

These are some of the best round-trip flight deals from the United States to Los Angeles that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from the United States to Los Angeles.

Cheap last minute flights

Planning a quick getaway from the United States to Los Angeles? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Los Angeles, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals to Los Angeles

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All round-trip flight deals to Los Angeles

The cheapest plane tickets to Los Angeles found on KAYAK recently.
10:03 pm - 11:31 pmSFO-ONT
1h 28mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$56Frontier
Find Deal
Fri, Jan 24 - Sun, Jan 26
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$57Frontier
Find Deal
Fri, Jan 10 - Mon, Jan 13
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
4:05 pm - 7:00 pmONT-SEA
2h 55mnonstop
$137Delta
Find Deal
Tue, Jan 7 - Wed, Jan 15
11:36 am - 4:59 pmSEA-ONT
5h 23m1 stop
6:00 am - 8:50 amONT-SEA
2h 50mnonstop
$146Alaska Airlines
Find Deal
Tue, Mar 4 - Tue, Mar 11
8:00 am - 10:38 amSEA-ONT
2h 38mnonstop
11:33 am - 2:24 pmONT-SEA
2h 51mnonstop
$157Alaska Airlines
Find Deal
Wed, Jan 29 - Sun, Feb 2
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
$177Delta
Find Deal
Thu, Jan 9 - Mon, Jan 13
8:55 pm - 10:16 pmDFW-ONT
3h 21mnonstop
7:00 am - 12:02 pmONT-DFW
3h 02mnonstop
$179American Airlines
Find Deal
Sat, Jan 25 - Sat, Feb 1
10:30 am - 12:01 pmDFW-ONT
3h 31mnonstop
6:05 am - 11:04 amONT-DFW
2h 59mnonstop
$184American Airlines
Find Deal
Wed, Dec 11 - Sat, Dec 14
4:23 pm - 11:58 pmSEA-ONT
7h 35m1 stop
10:35 am - 3:21 pmONT-SEA
4h 46m1 stop
$194United Airlines
Find Deal
Sat, Dec 14 - Tue, Dec 17
4:24 pm - 5:57 pmSFO-ONT
1h 33mnonstop
10:47 am - 12:20 pmONT-SFO
1h 33mnonstop
$199United Airlines
Find Deal
Mon, Jan 13 - Sat, Jan 18
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
$30Frontier
Find Deal
Fri, Dec 6
7:21 pm - 9:59 pmSEA-ONT
2h 38mnonstop
$31Frontier
Find Deal
Tue, Dec 17
3:40 pm - 6:13 pmSEA-ONT
2h 33mnonstop
$69Alaska Airlines
Find Deal
Sat, Jan 18
11:36 am - 5:04 pmSEA-ONT
5h 28m1 stop
$78Alaska Airlines
Find Deal
Sat, Jan 18
4:50 pm - 6:19 pmSFO-ONT
1h 29mnonstop
$79United Airlines
Find Deal
Sat, Jan 11
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
$89Delta
Find Deal
Fri, Jan 10
12:27 pm - 6:26 pmSFO-ONT
5h 59m1 stop
$99American Airlines
Find Deal
Tue, Feb 18
2:26 pm - 6:26 pmDEN-ONT
5h 00m1 stop
$99American Airlines
Find Deal
Tue, Feb 18
10:15 am - 2:29 pmDEN-ONT
5h 14m1 stop
$108United Airlines
Find Deal
Thu, Feb 20
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
$114Delta
Find Deal
Mon, Jan 20
4:36 pm - 6:02 pmSFO-ONT
1h 26mnonstop
4:07 pm - 5:33 pmONT-SFO
1h 26mnonstop
$100Frontier
Find Deal
Mon, Nov 25 - Tue, Nov 26
1:43 pm - 3:05 pmSFO-ONT
1h 22mnonstop
6:52 pm - 8:19 pmONT-SFO
1h 27mnonstop
$108Frontier
Find Deal
Tue, Nov 26 - Thu, Nov 28
9:31 pm - 11:59 pmSEA-ONT
2h 28mnonstop
8:55 pm - 11:44 pmONT-SEA
2h 49mnonstop
$309Alaska Airlines
Find Deal
Sun, Nov 24 - Thu, Dec 12
10:55 am - 1:27 pmSEA-ONT
2h 32mnonstop
6:00 am - 8:56 amONT-SEA
2h 56mnonstop
$312Alaska Airlines
Find Deal
Sun, Nov 24 - Fri, Dec 20
7:00 am - 4:45 pmJFK-ONT
12h 45m1 stop
12:11 pm - 12:54 amONT-JFK
9h 43m1 stop
$348Delta
Find Deal
Mon, Nov 25 - Fri, Dec 6
7:55 pm - 10:45 pmSEA-ONT
2h 50mnonstop
5:40 am - 8:40 amONT-SEA
3h 00mnonstop
$357Delta
Find Deal
Tue, Nov 26 - Fri, Nov 29
4:10 pm - 10:02 pmSFO-ONT
5h 52m1 stop
4:25 pm - 10:33 pmONT-SFO
6h 08m1 stop
$413American Airlines
Find Deal
Sat, Nov 23 - Wed, Nov 27
11:35 am - 1:00 pmSFO-ONT
1h 25mnonstop
6:00 am - 7:26 amONT-SFO
1h 26mnonstop
$432United Airlines
Find Deal
Tue, Nov 26 - Sat, Dec 7
2:26 pm - 10:02 pmEWR-ONT
10h 36m1 stop
5:05 am - 5:18 pmONT-EWR
9h 13m1 stop
$502United Airlines
Find Deal
Tue, Nov 26 - Thu, Nov 28
4:34 pm - 10:02 pmEWR-ONT
8h 28m1 stop
12:53 pm - 11:37 pmONT-EWR
7h 44m1 stop
$596American Airlines
Find Deal
Sun, Nov 24 - Fri, Dec 6
10:03 pm - 11:31 pmSFO-ONT
1h 28mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$56Frontier
Find Deal
Fri, Jan 24 - Sun, Jan 26
9:59 pm - 11:23 pmSFO-ONT
1h 24mnonstop
6:45 am - 8:20 amONT-SFO
1h 35mnonstop
$57Frontier
Find Deal
Fri, Jan 10 - Sun, Jan 12
9:56 am - 12:33 pmSEA-ONT
2h 37mnonstop
6:00 am - 8:54 amONT-SEA
2h 54mnonstop
$130Alaska Airlines
Find Deal
Sat, Jan 4 - Sat, Jan 11
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
$137Delta
Find Deal
Wed, Jan 8 - Tue, Jan 14
6:30 pm - 9:04 pmSEA-ONT
2h 34mnonstop
6:00 am - 8:53 amONT-SEA
2h 53mnonstop
$147Alaska Airlines
Find Deal
Sat, Dec 14 - Tue, Dec 17
8:31 am - 9:56 amDFW-ONT
3h 25mnonstop
7:00 am - 12:02 pmONT-DFW
3h 02mnonstop
$169American Airlines
Find Deal
Sat, Jan 25 - Sat, Feb 1
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
4:05 pm - 7:00 pmONT-SEA
2h 55mnonstop
$177Delta
Find Deal
Thu, Jan 9 - Mon, Jan 13
8:55 pm - 10:16 pmDFW-ONT
3h 21mnonstop
7:00 am - 12:02 pmONT-DFW
3h 02mnonstop
$179American Airlines
Find Deal
Sat, Jan 25 - Sat, Feb 1
4:35 pm - 6:04 pmSFO-ONT
1h 29mnonstop
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$179United Airlines
Find Deal
Wed, Jan 15 - Wed, Jan 22
8:25 am - 9:51 amSFO-ONT
1h 26mnonstop
6:15 am - 7:46 amONT-SFO
1h 31mnonstop
$199United Airlines
Find Deal
Mon, Jan 13 - Wed, Jan 15

Frontier flights from United States to Ontario

Our best Frontier deals on United States to Ontario flight tickets
Frontier
Jan 24
SFO10:03 pmSan Francisco
1h 28m
ONT11:31 pmOntario
Jan 26
ONT6:45 amOntario
1h 35m
SFO8:20 amSan Francisco
Frontier
Jan 10
SFO9:59 pmSan Francisco
1h 24m
ONT11:23 pmOntario
Jan 13
ONT6:45 amOntario
1h 35m
SFO8:20 amSan Francisco
Frontier
Jan 18
DEN10:15 pmDenver Intl
2h 32m
ONT11:47 pmOntario
Jan 21
ONT7:45 amOntario
2h 25m
DEN11:10 amDenver Intl

Delta flights from United States to Ontario

Our best Delta deals on United States to Ontario flight tickets
Delta
Jan 7
SEA7:45 pmSeattle/Tacoma Intl
2h 47m
ONT10:32 pmOntario
Jan 15
ONT4:05 pmOntario
2h 55m
SEA7:00 pmSeattle/Tacoma Intl
Delta
Jan 9
SEA7:45 pmSeattle/Tacoma Intl
2h 47m
ONT10:32 pmOntario
Jan 13
ONT6:00 amOntario
2h 55m
SEA8:55 amSeattle/Tacoma Intl
Delta
Dec 13
IAH1:10 pmHouston George Bush Intcntl
13h 04m
2 stops
ONT12:14 amOntario
Dec 15
ONT10:00 pmOntario
8h 33m
1 stop
IAH8:33 amHouston George Bush Intcntl

See travel insights to Los Angeles from

How to get the cheapest flight ticket from United States 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, January is the cheapest month to fly from United States to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $255. If you aren’t able to travel during the month of January, then book flights to Ontario from United States during September instead. Flights to Ontario in September, while not as cheap as those in January, still average around $298.

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 Wednesday when prices can be found for as low as $346. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from United States to Ontario for around $440.

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 United States to Ontario when you can find flight prices for as low as $324. 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 afternoon when prices are $396 on average. Flights to Ontario from United States in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest United States to Ontario flight route?

Fly from San Francisco to Ontario for the best United States - Ontario flight prices

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

Most flyers found that booking tickets 47 days in advance of their planned departure date is the best time to get cheap flights to Ontario. During this timeframe, flight prices are around $370. However, in the past 72 hours, people saw flights from United States for as low as $249.

What cabin class options are available on United States to Ontario flights?

There are 4 cabin classes available to choose from on United States 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 United States to Ontario flights?

You could potentially save up to 85% on your flight if you consider stops on a United States to Ontario flight.

Cheap United States to Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Ontario

Best Price Found

$30

Fastest flight time

1h 21m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from United States in the past 72 hours is $30. The best round-trip flight deal from United States to Ontario found on momondo in the last 72 hours is $56.
The fastest flight from United States to Ontario takes 1h 21m
Direct flights go from United States to Ontario every day.
There is 1 airport near Ontario: Ontario (ONT)

  • When did momondo last update prices for flights from United States to Ontario Airport?

    Prices for flights from United States to Ontario Airport refresh daily.

  • How many operators does momondo search for flights from United States to Ontario Airport?

  • How old do you have to be to fly from United States to Ontario Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United States 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 United States to Ontario?


Best airlines flying from United States to Ontario

Compare and see reviews for airlines that fly from United States to Ontario with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $29Free CancellationRating
6.3
8,169 reviews
Search Spirit Airlines flights
FrontierPriceFrom $38Free CancellationRating
6.1
3,536 reviews
Search Frontier flights
DeltaPriceFrom $45Free CancellationRating
8.0
8,755 reviews
Search Delta flights
Alaska AirlinesPriceFrom $55Free CancellationRating
8.0
9,464 reviews
Search Alaska Airlines flights
Breeze AirwaysPriceFrom $78Free CancellationRating
8.2
123 reviews
Search Breeze Airways flights
United AirlinesPriceFrom $138Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights
American AirlinesPriceFrom $173Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
JetBluePriceFrom $176Free CancellationRating
7.4
3,389 reviews
Search JetBlue flights
SouthwestPriceFrom $186Free CancellationRating
8.1
5,005 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from United States to Ontario?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from United States to Ontario. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from United States to Ontario with flexible booking policies on momondo?

All flight searches from United States to Ontario on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from United States to Ontario?

Once all potential United States to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Ontario from United States are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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