$433 Cheap Flights from Ontario (ONT) to Tromsø (TOS)

View $433 flight on Sun, Mar 8, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Tromsø (TOS-Langnes)

Cheap Flights from Ontario to Tromsø (ONT-TOS)

Prices were available within the past 7 days and start at $433 for one-way flights and $598 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Mon, Feb 2 - Thu, Feb 5
ONT
Ontario
TOS
Tromsø
$598 Roundtrip, found 5 days ago
$598
Roundtrip
found 5 days ago
Select KLM flight, departing Mon, Feb 2 from Ontario to Tromsø, returning Thu, Feb 5, priced at $598 found 5 days ago
Delta
Mon, Feb 2 - Thu, Feb 5
ONT
Ontario
TOS
Tromsø
$604 Roundtrip, found 5 days ago
$604
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Feb 2 from Ontario to Tromsø, returning Thu, Feb 5, priced at $604 found 5 days ago
American Airlines
Sun, Mar 8 - Tue, Mar 17
ONT
Ontario
TOS
Tromsø
$655 Roundtrip, found 6 days ago
$655
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sun, Mar 8 from Ontario to Tromsø, returning Tue, Mar 17, priced at $655 found 6 days ago
American Airlines
Sat, Mar 7 - Tue, Mar 17
ONT
Ontario
TOS
Tromsø
$661 Roundtrip, found 6 days ago
$661
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Mar 7 from Ontario to Tromsø, returning Tue, Mar 17, priced at $661 found 6 days ago
American Airlines
Mon, Mar 9 - Tue, Mar 17
ONT
Ontario
TOS
Tromsø
$669 Roundtrip, found 6 days ago
$669
Roundtrip
found 6 days ago
Select American Airlines flight, departing Mon, Mar 9 from Ontario to Tromsø, returning Tue, Mar 17, priced at $669 found 6 days ago
British Airways
Mon, Nov 10 - Mon, Nov 17
ONT
Ontario
TOS
Tromsø
$737 Roundtrip, found 2 days ago
$737
Roundtrip
found 2 days ago
Select British Airways flight, departing Mon, Nov 10 from Ontario to Tromsø, returning Mon, Nov 17, priced at $737 found 2 days ago
British Airways
Mon, Feb 23 - Fri, Feb 27
ONT
Ontario
TOS
Tromsø
$756 Roundtrip, found 2 days ago
$756
Roundtrip
found 2 days ago
Select British Airways flight, departing Mon, Feb 23 from Ontario to Tromsø, returning Fri, Feb 27, priced at $756 found 2 days ago
British Airways
Tue, Mar 3 - Wed, Mar 11
ONT
Ontario
TOS
Tromsø
$766 Roundtrip, found 5 days ago
$766
Roundtrip
found 5 days ago
Select British Airways flight, departing Tue, Mar 3 from Ontario to Tromsø, returning Wed, Mar 11, priced at $766 found 5 days ago
American Airlines
Mon, Apr 6 - Fri, Apr 10
ONT
Ontario
TOS
Tromsø
$787 Roundtrip, found 1 day ago
$787
Roundtrip
found 1 day ago
Select American Airlines flight, departing Mon, Apr 6 from Ontario to Tromsø, returning Fri, Apr 10, priced at $787 found 1 day ago
British Airways
Mon, Feb 23 - Fri, Feb 27
ONT
Ontario
TOS
Tromsø
$790 Roundtrip, found 2 days ago
$790
Roundtrip
found 2 days ago
Select British Airways flight, departing Mon, Feb 23 from Ontario to Tromsø, returning Fri, Feb 27, priced at $790 found 2 days ago

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Langnes Airport (TOS) cost?
Grab a cheap one-way flight from $433 or cheap return flight from $598 from Los Angeles - Ontario Intl. Airport (ONT) to Langnes Airport (TOS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Langnes Airport (TOS)?
Traveling in February may help you find better deals, as it's the cheapest month for flights between ONT and TOS. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Langnes Airport (TOS)?
To find the cheapest airline flying from ONT to TOS, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Langnes Airport (TOS)?
You'll need to catch a flight with a layover when traveling from Los Angeles - Ontario Intl. Airport (ONT) to Langnes Airport (TOS). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from ONT to TOS?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* But this can change based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Langnes Airport (TOS)?
To arrive at Langnes Airport (TOS) on schedule, opt for a flight that takes off from Los Angeles - Ontario Intl. Airport (ONT) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Langnes Airport (TOS) last-minute?
Waiting until right before your break to book a ticket from ONT to TOS generally means paying more. While you might find some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule to boost your chances of getting a bargain.
Is it cheaper to book an ONT to TOS flight and hotel package?
You'll typically save money by booking an ONT to TOS flight and hotel package compared to booking separately. In fact, you 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, consider adding extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Langnes Airport (TOS)?
If you booked your ONT to TOS flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more information.

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
Langnes
Airlines serving
British Airways
Roundtrip price
$598
Distance
4943 mi

Book with confidence

Ontario to Tromsø Flights

The cheapest times to fly from Ontario to Tromsø

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 Ontario to Tromsø are during the month of February. You can find some of the cheapest flights from Ontario to Tromsø with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Tromsø

Sunday is one of the best days to book for cheap flights from Ontario to Tromsø: 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 Ontario to Tromsø

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 Ontario to Tromsø in 2025. You can also book with separate airlines for your outbound and return journeys, from $433 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 Ontario to Tromsø 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 Ontario to Tromsø 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.

 

Ontario to Tromsø Flights

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*Available to One Key members.