HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Oslo Gardermoen

$350+ Cheap flights from Ontario (ONT) to Oslo Gardermoen (OSL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OSL
Jun 28 — Jul 51
Sat 6/28
Sat 7/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Oslo Gardermoen with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Oslo Gardermoen

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Oslo Gardermoen (OSL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 23, 2025.

Round-trip from

$375
(American Airlines)

One-way from

$350
(British Airways)

Popular in

June

Cheapest in

March

Average price

$982
From Ontario to Oslo Gardermoen
Search Deals
One-way flight from Ontario to Oslo Gardermoen
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($157 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Ontario to Oslo Gardermoen

Cheapest flights from Ontario to Oslo Gardermoen
Explore the most affordable flight options available from Ontario to Oslo Gardermoen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2025.

This American Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/174:54 pmONT - OSL
2 stops21h 46mAmerican Airlines
Fri 8/221:10 pmOSL - ONT
2 stops18h 38mAmerican Airlines
Deal found 6/22$375
This Orbitz deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/42:30 pmONT - OSL
2 stops24h 25mBritish Airways
Mon 9/88:35 pmOSL - ONT
2 stops31h 19mBritish Airways
Deal found 6/21$463
This Delta deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/62:14 pmONT - OSL
2 stops17h 06mDelta
Wed 8/206:30 amOSL - ONT
2 stops19h 41mDelta
Deal found 6/20$523
This United Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/305:40 amONT - OSL
2 stops22h 20mUnited Airlines
Tue 12/96:15 amOSL - ONT
2 stops20h 31mUnited Airlines
Deal found 6/22$547
This American Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/223:00 pmONT - OSL
2 stops19h 15mMultiple Airlines
Tue 11/411:40 amOSL - ONT
2 stops19h 20mMultiple Airlines
Deal found 6/22$623
This Iberia deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:00 amONT - OSL
2 stops18h 15mIberia
Wed 12/33:00 pmOSL - ONT
2 stops29h 30mIberia
Deal found 6/22$790

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Oslo Gardermoen that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 23, 2025.
Use the filters below to find and compare flights from Ontario to Oslo Gardermoen Airport that are best for you.

Fly from

Ontario

Fly to

Oslo Gardermoen

Route

Depart

Return

Price

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 8/17

4:54 pm-11:40 pm

2 stops21h 46m

Oslo Gardermoen

Fri 8/22

1:10 pm-10:48 pm

2 stops18h 38m

$375

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Thu 9/4

2:30 pm-11:55 pm

2 stops24h 25m

Oslo Gardermoen

Mon 9/8

8:35 pm-6:54 pm

2 stops31h 19m

$463

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Wed 8/6

2:14 pm-4:20 pm

2 stops17h 06m

Oslo Gardermoen

Wed 8/20

6:30 am-5:11 pm

2 stops19h 41m

$523

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 11/30

5:40 am-1:00 pm

2 stops22h 20m

Oslo Gardermoen

Tue 12/9

6:15 am-5:46 pm

2 stops20h 31m

$547

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Wed 10/22

3:00 pm-7:15 pm

2 stops19h 15m

Oslo Gardermoen

Tue 11/4

11:40 am-10:00 pm

2 stops19h 20m

$623

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Wed 11/19

11:00 am-2:15 pm

2 stops18h 15m

Oslo Gardermoen

Wed 12/3

3:00 pm-11:30 am

2 stops29h 30m

$790

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Wed 8/13

4:54 pm-11:30 pm

2 stops21h 36m

$350

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Mon 8/11

1:34 pm-6:05 pm

2 stops19h 31m

$401

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sat 8/23

11:39 am-12:35 pm

2 stops15h 56m

$2,537

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Fri 8/22

10:50 am-4:35 pm

2 stops20h 45m

$3,791

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/22

Best time to book a flight from Ontario to Oslo Gardermoen

Have a flexible travel schedule? Discover the best time to fly to Oslo Gardermoen from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Oslo Gardermoen Airport

What is the cheapest month to book a flight from Ontario to Oslo Gardermoen Airport?

Currently, November is the cheapest month in which you can book a flight from Ontario to Oslo Gardermoen Airport (average of $567). Flying from Ontario to Oslo Gardermoen Airport in June is currently the most expensive (average of $1,016). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to OSL?

Find hourly flight availability from Ontario to Oslo Gardermoen. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 23, 2025.

It’s typically best to fly out from Ontario to Oslo Gardermoen Airport in the morning. Doing so could potentially save you 41% on the flight price compared to flying at noon, which is usually more expensive.

Rainfall in Oslo Gardermoen by month

Plan your trip to Oslo Gardermoen by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Oslo Gardermoen Airport ranges from 1.6 - 3.5 inches per month. August is typically the wettest month, when rainfall can reach 3.5 in. February is typically the driest time to visit Oslo Gardermoen Airport when rainfall is around 1.6 in.

Temperature in Oslo Gardermoen by month

Plan your trip to Oslo Gardermoen by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Oslo Gardermoen Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.6 F).

Reviews of airlines servicing Oslo Gardermoen

Get insights into the airlines that provide service to Oslo Gardermoen. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Oslo Gardermoen. Reviews last updated June 23, 2025.
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,966 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,831 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
2,794 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
7,056 reviews
Delta
8.0
Very good
7,966 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Oslo Gardermoen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Oslo Gardermoen?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Oslo Gardermoen. 0 airlines have flights from Ontario to Oslo Gardermoen on a regular basis. Booking flights from Ontario to Oslo Gardermoen should not be difficult; the airport handles an average of 0 outbound flights to Oslo Gardermoen per day.

  • What are the cheapest airlines flying from Ontario to Oslo Gardermoen Airport round-trip?

    Cheapflights users have booked flights from Ontario to Oslo Gardermoen Airport round-trip from $375. Other airlines that can offer you cheap pricing are British Airways, from $463, and Delta, from $523.

  • What are the cheapest airlines to fly from Ontario to Oslo Gardermoen Airport one-way?

    One-way options have recently been found by users for as low as $350 on British Airways. Other airlines that offer cheap prices include United Airlines from $401 and American Airlines from $3,791 one-way.

  • Can I find deals for flights from Ontario to Oslo Gardermoen that include hotel bookings?

    Yes. In addition to deals on Ontario to Oslo Gardermoen flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Oslo Gardermoen?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Oslo Gardermoen.

  • Can I find deals for business class flights from Ontario to Oslo Gardermoen?

    Yes. Cheapflights offers flight deals from Ontario to Oslo Gardermoen by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Oslo Gardermoen Airport?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Oslo Gardermoen Airport (average of $567). Flying from Ontario to Oslo Gardermoen Airport in June is currently the most expensive (average of $1,016). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Gardermoen

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Oslo Gardermoen

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Oslo Gardermoen flights
San Francisco to Oslo Gardermoen flights
Los Angeles to Sandefjord flights
Santa Ana to Oslo Gardermoen flights
Burbank to Oslo Gardermoen flights
San Jose to Oslo Gardermoen flights
Oakland to Oslo Gardermoen flights
San Francisco to Sandefjord flights
San Diego to Oslo Gardermoen flights
Long Beach to Oslo Gardermoen flights
San Jose to Sandefjord flights
Las Vegas to Oslo Gardermoen flights
Sacramento to Oslo Gardermoen flights
Reno to Oslo Gardermoen flights
Medford to Oslo Gardermoen flights
San Diego to Sandefjord flights
Fresno to Oslo Gardermoen flights
Santa Barbara to Oslo Gardermoen flights
Sacramento to Sandefjord flights
Oakland to Sandefjord flights
Monterey to Oslo Gardermoen flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.