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Cheap flights from the United States to Ontario from $34

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 4/17. 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

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Find the cheapest flights from the United States to Los Angeles

Recent round-trip flight deals from the United States to Los Angeles

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.
8:34 am - 10:02 amSFO-ONT
1h 28mnonstop
8:24 am - 10:02 amONT-SFO
1h 38mnonstop
$57Frontier
Find Deal
Thu, May 15 - Sun, May 18
10:38 pm - 11:59 pmDEN-ONT
2h 21mnonstop
12:59 am - 4:16 amONT-DEN
2h 17mnonstop
$57Frontier
Find Deal
Tue, Apr 22 - Mon, Apr 28
9:30 am - 11:05 amSFO-ONT
1h 35mnonstop
6:00 am - 7:28 amONT-SFO
1h 28mnonstop
$92United Airlines
Find Deal
Thu, Apr 10 - Sat, Apr 12
1:20 pm - 2:50 pmSFO-ONT
1h 30mnonstop
6:39 pm - 8:23 pmONT-SFO
1h 44mnonstop
$112United Airlines
Find Deal
Wed, Apr 9 - Wed, Apr 9
9:40 pm - 11:00 pmDEN-ONT
2h 20mnonstop
7:35 pm - 12:55 amONT-DEN
4h 20m1 stop
$127Southwest
Find Deal
Thu, May 1 - Sun, May 4
8:25 am - 9:45 amDEN-ONT
2h 20mnonstop
3:30 pm - 6:40 pmONT-DEN
2h 10mnonstop
$137Southwest
Find Deal
Wed, May 21 - Tue, Jun 10
11:16 am - 3:32 pmDEN-ONT
5h 16m1 stop
4:35 pm - 9:48 pmONT-DEN
4h 13m1 stop
$198American Airlines
Find Deal
Thu, Apr 3 - Mon, Apr 7
11:16 am - 3:59 pmDEN-ONT
5h 43m1 stop
4:35 pm - 9:48 pmONT-DEN
4h 13m1 stop
$199American Airlines
Find Deal
Sat, Apr 5 - Mon, Apr 7
7:55 pm - 10:35 pmSEA-ONT
2h 40mnonstop
7:05 pm - 10:05 pmONT-SEA
3h 00mnonstop
$208Delta
Find Deal
Wed, May 21 - Tue, May 27
7:05 pm - 11:41 pmPDX-ONT
4h 36m1 stop
6:00 am - 12:28 pmONT-PDX
6h 28m1 stop
$208Delta
Find Deal
Thu, Apr 17 - Sun, Apr 20

Frontier flights from United States to Ontario

Our best Frontier deals on United States to Ontario flight tickets
Frontier
May 15
SFO8:34 amSan Francisco
1h 28m
ONT10:02 amOntario
May 18
ONT8:24 amOntario
1h 38m
SFO10:02 amSan Francisco
Frontier
Apr 15
DEN10:37 pmDenver Intl
2h 22m
ONT11:59 pmOntario
Apr 21
ONT12:59 amOntario
2h 17m
DEN4:16 amDenver Intl
Frontier
May 10
SFO8:34 amSan Francisco
1h 28m
ONT10:02 amOntario
May 12
ONT8:24 amOntario
1h 38m
SFO10:02 amSan Francisco

Alaska Airlines flights from United States to Ontario

Our best Alaska Airlines deals on United States to Ontario flight tickets
Alaska Airlines
Apr 18
DEN5:38 pmDenver Intl
7h 21m
1 stop
ONT11:59 pmOntario
Apr 20
ONT7:00 amOntario
6h 53m
1 stop
DEN2:53 pmDenver Intl
Alaska Airlines
Apr 18
DEN7:57 pmDenver Intl
15h 42m
1 stop
ONT10:39 amOntario
Apr 20
ONT7:00 amOntario
6h 53m
1 stop
DEN2:53 pmDenver Intl
Alaska Airlines
Apr 18
DEN5:38 pmDenver Intl
7h 21m
1 stop
ONT11:59 pmOntario
Apr 23
ONT4:29 pmOntario
6h 30m
1 stop
DEN11:59 pmDenver Intl

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, September 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 $298. If you aren’t able to travel during the month of September, then book flights to Ontario from United States during October instead. Flights to Ontario in October, while not as cheap as those in September, still average around $318.

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 Saturday when prices can be found for as low as $380. 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 $511.

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 $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 evening when prices are $414 on average. Flights to Ontario from United States in the evening 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 Las Vegas Harry Reid Intl to Ontario for the best United States - 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 United States when booking 21 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $403 when searching 21 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from United States for as low as $305 on momondo.

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.

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

$34

Fastest flight time

1h 25m

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 $34. The best round-trip flight deal from United States to Ontario found on momondo in the last 72 hours is $57.
The fastest flight from United States to Ontario takes 1h 25m
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 $26Free CancellationRating
6.3
7,894 reviews
Search Spirit Airlines flights
FrontierPriceFrom $38Free CancellationRating
6.0
3,293 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $45Free CancellationRating
8.0
9,734 reviews
Search Alaska Airlines flights
DeltaPriceFrom $45Free CancellationRating
8.0
7,944 reviews
Search Delta flights
Breeze AirwaysPriceFrom $78Free CancellationRating
8.0
155 reviews
Search Breeze Airways flights
Hawaiian AirlinesPriceFrom $95Free CancellationRating
7.9
2,318 reviews
Search Hawaiian Airlines flights
United AirlinesPriceFrom $100Free CancellationRating
7.4
8,623 reviews
Search United Airlines flights
SouthwestPriceFrom $117Free CancellationRating
8.0
4,292 reviews
Search Southwest flights
JetBluePriceFrom $176Free CancellationRating
7.3
2,953 reviews
Search JetBlue flights
American AirlinesPriceFrom $216Free CancellationRating
7.2
10,000 reviews
Search American Airlines 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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