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Cheap flights from Ontario to Oslo from $331

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Oslo departing on 8/26. 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 Ontario to Oslo

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:00 am - 5:15 pm
ONT
-
OSL
25h 15m
2 stops
United Airlines Logo
6:35 am - 8:01 pm
OSL
-
ONT
22h 26m
3 stops
$766United Airlines
Tue, Aug 11 - Wed, Aug 19
British Airways Logo
4:59 pm - 6:40 pm
ONT
-
OSL
17h 41m
2 stops
British Airways Logo
8:25 am - 6:22 pm
OSL
-
ONT
18h 57m
2 stops
$774British Airways
Mon, Oct 26 - Wed, Nov 4
United Airlines Logo
1:18 pm - 3:45 pm
ONT
-
OSL
17h 27m
2 stops
United Airlines Logo
11:50 am - 11:06 pm
OSL
-
ONT
20h 16m
2 stops
$777United Airlines
Tue, Oct 20 - Tue, Nov 3
United Airlines Logo
7:00 am - 1:05 pm
ONT
-
OSL
21h 05m
2 stops
United Airlines Logo
6:15 am - 8:20 pm
OSL
-
ONT
23h 05m
2 stops
$778United Airlines
Thu, Nov 19 - Thu, Dec 3
United Airlines Logo
1:18 pm - 6:00 pm
ONT
-
OSL
19h 42m
2 stops
United Airlines Logo
6:55 am - 6:11 pm
OSL
-
ONT
20h 16m
2 stops
$789United Airlines
Tue, Aug 18 - Tue, Sep 1
United Airlines Logo
6:39 pm - 10:05 pm
ONT
-
OSL
18h 26m
2 stops
United Airlines Logo
6:35 am - 8:01 pm
OSL
-
ONT
22h 26m
2 stops
$790United Airlines
Sun, Aug 9 - Wed, Sep 2
British Airways Logo
12:35 pm - 4:20 pm
ONT
-
OSL
18h 45m
2 stops
British Airways Logo
8:25 am - 6:57 pm
OSL
-
ONT
18h 32m
2 stops
$791British Airways
Fri, Oct 16 - Fri, Oct 30
British Airways Logo
4:59 pm - 10:20 pm
ONT
-
OSL
20h 21m
2 stops
British Airways Logo
8:35 am - 6:57 pm
OSL
-
ONT
19h 22m
2 stops
$802British Airways
Fri, Oct 16 - Fri, Oct 23
United Airlines Logo
1:56 pm - 6:35 pm
ONT
-
OSL
19h 39m
2 stops
United Airlines Logo
6:25 am - 6:11 pm
OSL
-
ONT
20h 46m
2 stops
$804United Airlines
Fri, Aug 21 - Fri, Sep 4
British Airways Logo
4:59 pm - 10:20 pm
ONT
-
OSL
20h 21m
2 stops
British Airways Logo
8:35 am - 6:57 pm
OSL
-
ONT
19h 22m
2 stops
$805British Airways
Fri, Oct 9 - Fri, Oct 23

British Airways flights from Ontario to Oslo Gardermoen Airport

Our best British Airways deals on Ontario to Oslo Gardermoen Airport flight tickets
British Airways
Oct 26
ONT4:59 pmOntario
17h 41m
2 stops
OSL6:40 pmOslo Gardermoen
Nov 4
OSL8:25 amOslo Gardermoen
18h 57m
2 stops
ONT6:22 pmOntario
$774
British Airways
Oct 16
ONT12:35 pmOntario
18h 45m
2 stops
OSL4:20 pmOslo Gardermoen
Oct 30
OSL8:25 amOslo Gardermoen
18h 32m
2 stops
ONT6:57 pmOntario
$791
British Airways
Oct 16
ONT4:59 pmOntario
20h 21m
2 stops
OSL10:20 pmOslo Gardermoen
Oct 23
OSL8:35 amOslo Gardermoen
19h 22m
2 stops
ONT6:57 pmOntario
$802

United Airlines flights from Ontario to Oslo Gardermoen Airport

Our best United Airlines deals on Ontario to Oslo Gardermoen Airport flight tickets
United Airlines
Aug 11
ONT7:00 amOntario
25h 15m
2 stops
OSL5:15 pmOslo Gardermoen
Aug 19
OSL6:35 amOslo Gardermoen
22h 26m
3 stops
ONT8:01 pmOntario
$766
United Airlines
Oct 20
ONT1:18 pmOntario
17h 27m
2 stops
OSL3:45 pmOslo Gardermoen
Nov 3
OSL11:50 amOslo Gardermoen
20h 16m
2 stops
ONT11:06 pmOntario
$777
United Airlines
Nov 19
ONT7:00 amOntario
21h 05m
2 stops
OSL1:05 pmOslo Gardermoen
Dec 3
OSL6:15 amOslo Gardermoen
23h 05m
2 stops
ONT8:20 pmOntario
$778

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Oslo Gardermoen Airport 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, momondo users made 832,500 searches. Data last updated May 23, 2026.
Use the filters below to find and compare flights from Ontario to Oslo Gardermoen Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Tue 8/11

7:00 am-5:15 pm

2 stops25h 15m

Oslo Gardermoen

Wed 8/19

6:35 am-8:01 pm

3 stops22h 26m

$766
Quickest round-trip

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Mon 10/26

4:59 pm-6:40 pm

2 stops17h 41m

Oslo Gardermoen

Wed 11/4

8:25 am-6:22 pm

2 stops18h 57m

$774

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Tue 10/20

1:18 pm-3:45 pm

2 stops17h 27m

Oslo Gardermoen

Tue 11/3

11:50 am-11:06 pm

2 stops20h 16m

$777

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Thu 11/19

7:00 am-1:05 pm

2 stops21h 05m

Oslo Gardermoen

Thu 12/3

6:15 am-8:20 pm

2 stops23h 05m

$778

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Tue 8/18

1:18 pm-6:00 pm

2 stops19h 42m

Oslo Gardermoen

Tue 9/1

6:55 am-6:11 pm

2 stops20h 16m

$789

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 8/9

6:39 pm-10:05 pm

2 stops18h 26m

Oslo Gardermoen

Wed 9/2

6:35 am-8:01 pm

2 stops22h 26m

$790

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Fri 10/16

12:35 pm-4:20 pm

2 stops18h 45m

Oslo Gardermoen

Fri 10/30

8:25 am-6:57 pm

2 stops18h 32m

$791

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Fri 10/16

4:59 pm-10:20 pm

2 stops20h 21m

Oslo Gardermoen

Fri 10/23

8:35 am-6:57 pm

2 stops19h 22m

$802

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Fri 8/21

1:56 pm-6:35 pm

2 stops19h 39m

Oslo Gardermoen

Fri 9/4

6:25 am-6:11 pm

2 stops20h 46m

$804

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Fri 10/9

4:59 pm-10:20 pm

2 stops20h 21m

Oslo Gardermoen

Fri 10/23

8:35 am-6:57 pm

2 stops19h 22m

$805

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Oslo from

How to get the cheapest flight ticket from Ontario to Oslo Gardermoen Airport

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 airline that flies from Ontario to Oslo Gardermoen?

Alaska Airlines and United Airlines are the most popular carriers operating from Ontario to Oslo Gardermoen

What airlines fly to Oslo Gardermoen Airport?

Scandinavian Airlines, Lufthansa and KLM are the top three most popular airlines that fly to Oslo Gardermoen Airport from Ontario according to our data. Scandinavian Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Oslo Gardermoen Airport. Keep in mind that there are 11 different airlines that fly to Oslo Gardermoen Airport on a routine basis, so you have a few additional options to choose from.

When to book flights from Ontario to Oslo Gardermoen Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Oslo Gardermoen Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Oslo Gardermoen Airport (ONT to OSL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Oslo Gardermoen Airport

Fastest flight time

16h 20m

Direct flights

None
The fastest flight from Ontario to Oslo Gardermoen Airport takes 16h 20m
There are no direct flights from Ontario to Oslo Gardermoen Airport. There are no popular flight routes from Ontario to Oslo Gardermoen Airport.
Search flight deals

Frequently asked questions about flying from Ontario to Oslo Gardermoen Airport

  • How far is Ontario to Oslo Gardermoen by plane?

    The straight-line distance from Ontario to Oslo Gardermoen is 5303.0 mi. Flights usually cover this in 16h 20m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Ontario Airport to Oslo Gardermoen Airport?

    Prices for flights from Ontario Airport to Oslo Gardermoen Airport are updated daily.

  • How old do you have to be to fly from Ontario Airport to Oslo Gardermoen 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 Ontario Airport to Oslo Gardermoen Airport.

  • What documentation or ID do you need to fly to Oslo Gardermoen Airport?

    The necessary travel and health documents for your Oslo Gardermoen Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Oslo?

Book flights to Oslo if you plan to visit one of these locations
Gardermoen
Fredrikstad
Lillehammer
Drammen

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Oslo?

Finding the right flight to Oslo from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Oslo quick and easy, saving you time and money.

Can I find flights from Ontario to Oslo with flexible booking policies on momondo?

momondo does allow users to show only those flights to Oslo from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Oslo?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Oslo from Ontario.

I’m not ready to book a flight from Ontario to Oslo right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Oslo from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Oslo Gardermoen Airport trip

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