$400 Cheap Flights from Ontario (ONT) to Oslo (OSL)

View $400 flight on Wed, Jan 14, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Gardermoen Airport (OSL)

Cheap Flights from Ontario to Oslo (ONT-OSL)

Prices were available within the past 7 days and start at $400 for one-way flights and $530 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$530 Roundtrip, found 16 hours ago
$530
Roundtrip
found 16 hours ago
Select Delta flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $530 found 16 hours ago
Delta
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$536 Roundtrip, found 16 hours ago
$536
Roundtrip
found 16 hours ago
Select Delta flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $536 found 16 hours ago
Delta
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$536 Roundtrip, found 16 hours ago
$536
Roundtrip
found 16 hours ago
Select Delta flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $536 found 16 hours ago
Delta
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$537 Roundtrip, found 16 hours ago
$537
Roundtrip
found 16 hours ago
Select Delta flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $537 found 16 hours ago
Delta
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$540 Roundtrip, found 16 hours ago
$540
Roundtrip
found 16 hours ago
Select Delta flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $540 found 16 hours ago
Delta
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$542 Roundtrip, found 16 hours ago
$542
Roundtrip
found 16 hours ago
Select Delta flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $542 found 16 hours ago
United
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$550 Roundtrip, found 16 hours ago
$550
Roundtrip
found 16 hours ago
Select United flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $550 found 16 hours ago
British Airways
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$591 Roundtrip, found 16 hours ago
$591
Roundtrip
found 16 hours ago
Select British Airways flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $591 found 16 hours ago
KLM
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$595 Roundtrip, found 16 hours ago
$595
Roundtrip
found 16 hours ago
Select KLM flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $595 found 16 hours ago
Air France
Wed, Jan 14 - Wed, Jan 21
ONT
Ontario
OSL
Oslo
$595 Roundtrip, found 16 hours ago
$595
Roundtrip
found 16 hours ago
Select Air France flight, departing Wed, Jan 14 from Ontario to Oslo, returning Wed, Jan 21, priced at $595 found 16 hours ago

Alternative airports near Oslo

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

Select flight to Gardermoen OSL. Cheapest and Closest option available. Average driving time to city center is 40 minutes. Flights from $1,116
OSL
Gardermoen
CheapestClosest
Average driving time to city center40 min
Flights from $1,116

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Gardermoen Airport (OSL) cost?
Lock in a cheap one-way flight from $400 or cheap return flight from $530 from Los Angeles - Ontario Intl. Airport (ONT) to Gardermoen Airport (OSL) 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 Los Angeles - Ontario Intl. Airport (ONT) to Gardermoen Airport (OSL)?
January is the cheapest month to fly from ONT to OSL. Traveling outside of peak seasons is often the key to finding a great deal.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Gardermoen Airport (OSL)?
To find the cheapest airline flying from ONT to OSL, use Expedia's filter tool. Customize your search based on your travel style, 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 Gardermoen Airport (OSL)?
There are no daily direct flights available from Los Angeles - Ontario Intl. Airport (ONT) to Gardermoen Airport (OSL). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from ONT to OSL?
Generally you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the season, airline 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 Gardermoen Airport (OSL)?
To avoid possible delays on the Los Angeles - Ontario Intl. Airport (ONT) to Gardermoen Airport (OSL) route, aim to travel before 3 PM. Later flights are 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.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Gardermoen Airport (OSL) last-minute?
Last-minute bookings from ONT to OSL are usually more expensive. To secure the best rates, start looking for flights early. That said, if you can play around with your travel dates, it's possible to find a cheap ticket right before your trip.
Is it cheaper to book an ONT to OSL flight and hotel package?
You'll generally save money by securing an ONT to OSL 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 it all in one convenient place. After selecting your ideal accommodations and flights, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Gardermoen Airport (OSL)?
It's usually possible to cancel or reschedule your ONT to OSL flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
Gardermoen
Airlines serving
Air France, American Airlines, British Airways, Delta, Iberia, KLM, United
Roundtrip price
$530
Distance
5305 mi

Book with confidence

Book with confidence

Ontario to Oslo Flights

The cheapest times to fly from Ontario to Oslo

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

 

The best time to book a flight from Ontario to Oslo

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

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 Oslo in 2025. You can also book with separate airlines for your outbound and return journeys, from $400 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 Oslo 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 Oslo 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 Oslo Flights

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*Available to One Key members.