$584 Cheap Flights from Helsinki (HEL) to Ontario (ONT)

View $584 flight on Mon, Sep 29, 2025Opens in a new window

Popular airlines from Helsinki-Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Helsinki to Ontario (HEL-ONT)

Prices were available within the past 7 days and start at $584 for one-way flights and $839 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Fri, Jan 30 - Tue, Feb 10
HEL
Helsinki
ONT
Ontario
$839 Roundtrip, found 5 days ago
$839
Roundtrip
found 5 days ago
Select British Airways flight, departing Fri, Jan 30 from Helsinki to Ontario, returning Tue, Feb 10, priced at $839 found 5 days ago
British Airways
Thu, Mar 19 - Sat, Mar 28
HEL
Helsinki
ONT
Ontario
$845 Roundtrip, found 2 days ago
$845
Roundtrip
found 2 days ago
Select British Airways flight, departing Thu, Mar 19 from Helsinki to Ontario, returning Sat, Mar 28, priced at $845 found 2 days ago
American Airlines
Sat, Aug 30 - Sun, Sep 7
HEL
Helsinki
ONT
Ontario
$871 Roundtrip, found 4 days ago
$871
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Aug 30 from Helsinki to Ontario, returning Sun, Sep 7, priced at $871 found 4 days ago
British Airways
Mon, Nov 24 - Thu, Dec 4
HEL
Helsinki
ONT
Ontario
$873 Roundtrip, found 20 hours ago
$873
Roundtrip
found 20 hours ago
Select British Airways flight, departing Mon, Nov 24 from Helsinki to Ontario, returning Thu, Dec 4, priced at $873 found 20 hours ago
British Airways
Mon, Nov 10 - Thu, Nov 27
HEL
Helsinki
ONT
Ontario
$875 Roundtrip, found 1 day ago
$875
Roundtrip
found 1 day ago
Select British Airways flight, departing Mon, Nov 10 from Helsinki to Ontario, returning Thu, Nov 27, priced at $875 found 1 day ago
American Airlines
Sat, Aug 30 - Sun, Sep 7
HEL
Helsinki
ONT
Ontario
$900 Roundtrip, found 4 days ago
$900
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Aug 30 from Helsinki to Ontario, returning Sun, Sep 7, priced at $900 found 4 days ago
American Airlines
Thu, Nov 13 - Sun, Nov 30
HEL
Helsinki
ONT
Ontario
$902 Roundtrip, found 1 hour ago
$902
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Thu, Nov 13 from Helsinki to Ontario, returning Sun, Nov 30, priced at $902 found 1 hour ago
British Airways
Sat, Sep 13 - Sat, Sep 27
HEL
Helsinki
ONT
Ontario
$902 Roundtrip, found 19 hours ago
$902
Roundtrip
found 19 hours ago
Select British Airways flight, departing Sat, Sep 13 from Helsinki to Ontario, returning Sat, Sep 27, priced at $902 found 19 hours ago
British Airways
Fri, Sep 5 - Tue, Sep 9
HEL
Helsinki
ONT
Ontario
$909 Roundtrip, found 3 days ago
$909
Roundtrip
found 3 days ago
Select British Airways flight, departing Fri, Sep 5 from Helsinki to Ontario, returning Tue, Sep 9, priced at $909 found 3 days ago
Iberia
Thu, Nov 13 - Sun, Nov 30
HEL
Helsinki
ONT
Ontario
$1,094 Roundtrip, found 1 hour ago
$1,094
Roundtrip
found 1 hour ago
Select Iberia flight, departing Thu, Nov 13 from Helsinki to Ontario, returning Sun, Nov 30, priced at $1,094 found 1 hour ago

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Los Angeles - Ontario Intl. ONT. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $967
ONT
Los Angeles - Ontario Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $967
Flights from Helsinki (HEL) to Ontario (ONT)
Origin airport
Vantaa
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
British Airways
Roundtrip price
$838
Distance
5578 mi

Helsinki to Ontario Flights

The cheapest times to fly from Helsinki to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Helsinki to Ontario are during the month of January. You can find some of the cheapest flights from Helsinki to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Helsinki to Ontario

Sunday is one of the best days to book for cheap flights from Helsinki to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Helsinki to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Helsinki to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $584 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Helsinki to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Helsinki to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Secure a cheap one-way flight from $584 or cheap return flight from $839 from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT)?
January is the most affordable month to fly from HEL to ONT. Traveling during an off-peak travel window is often the key to finding better deals on flights.
What is the cheapest airline that flies from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from HEL to ONT. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT)?
Direct flights from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from HEL to ONT?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on a number of factors, including the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT)?
Select a flight from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Ontario from Vantaa Airport (HEL)?
If you're taking a direct flight from Vantaa Airport (HEL) to Ontario, Los Angeles Intl. Airport (LAX) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Waiting until just before your trip to book your flight from HEL to ONT generally means paying more. While it's possible to find some last-minute deals, there's no guarantee. Be flexible with your travel plans for a better chance of scoring a bargain.
Is it cheaper to book a HEL to ONT flight and hotel package?
You'll generally save money by booking a HEL to ONT flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've selected your ideal flights and accommodations, you can add extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Vantaa Airport (HEL) to Los Angeles - Ontario Intl. Airport (ONT)?
Usually, it's possible to reschedule or cancel your HEL to ONT flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.