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Cheap flights from Ontario to Oslo from $342

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 10/14. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to Oslo

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:00 am - 5:40 pm
ONT
-
OSL
27h 40m
2 stops
United Airlines Logo
6:15 am - 8:06 pm
OSL
-
ONT
22h 51m
2 stops
$730United Airlines
Tue, Nov 10 - Thu, Nov 12
United Airlines Logo
6:36 pm - 3:45 pm
ONT
-
OSL
36h 09m
2 stops
United Airlines Logo
6:15 am - 8:56 pm
OSL
-
ONT
23h 41m
2 stops
$736United Airlines
Mon, Nov 9 - Thu, Nov 12
Multiple Airlines Logo
7:00 am - 2:15 pm
ONT
-
OSL
22h 15m
2 stops
Multiple Airlines Logo
8:50 pm - 10:23 pm
OSL
-
ONT
34h 33m
2 stops
$743Multiple Airlines
Sun, Nov 1 - Wed, Nov 11
British Airways Logo
9:59 am - 10:40 pm
ONT
-
OSL
27h 41m
2 stops
British Airways Logo
7:05 am - 11:55 pm
OSL
-
ONT
25h 50m
2 stops
$747British Airways
Tue, Dec 1 - Thu, Dec 10
Delta Logo
11:55 am - 6:50 pm
ONT
-
OSL
21h 55m
2 stops
Delta Logo
9:30 am - 4:12 pm
OSL
-
ONT
39h 42m
2 stops
$750Delta
Wed, Dec 2 - Thu, Dec 10
United Airlines Logo
1:13 pm - 5:40 pm
ONT
-
OSL
19h 27m
2 stops
United Airlines Logo
9:35 am - 8:06 pm
OSL
-
ONT
19h 31m
2 stops
$762United Airlines
Fri, Nov 6 - Fri, Nov 20
United Airlines Logo
6:39 pm - 10:05 pm
ONT
-
OSL
18h 26m
2 stops
United Airlines Logo
6:45 am - 6:11 pm
OSL
-
ONT
20h 26m
2 stops
$763United Airlines
Sun, Aug 9 - Mon, Aug 24
Delta Logo
12:00 pm - 6:35 pm
ONT
-
OSL
21h 35m
2 stops
Delta Logo
6:30 am - 11:34 pm
OSL
-
ONT
26h 04m
2 stops
$764Delta
Wed, Aug 5 - Wed, Aug 19
Delta Logo
10:00 pm - 4:20 pm
ONT
-
OSL
33h 20m
2 stops
Delta Logo
2:10 pm - 4:24 pm
OSL
-
ONT
35h 14m
2 stops
$769Delta
Sun, Aug 9 - Mon, Aug 24
United Airlines Logo
6:00 am - 5:30 pm
ONT
-
OSL
26h 30m
2 stops
United Airlines Logo
1:55 pm - 11:06 pm
OSL
-
ONT
18h 11m
2 stops
$771United Airlines
Mon, Nov 30 - Wed, Dec 9

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Delta flights from Ontario to Oslo Gardermoen Airport

Our best Delta deals on Ontario to Oslo Gardermoen Airport flight tickets
Delta
Dec 2
ONT11:55 amOntario
21h 55m
2 stops
OSL6:50 pmOslo Gardermoen
Dec 10
OSL9:30 amOslo Gardermoen
39h 42m
2 stops
ONT4:12 pmOntario
$750
Delta
Aug 5
ONT12:00 pmOntario
21h 35m
2 stops
OSL6:35 pmOslo Gardermoen
Aug 19
OSL6:30 amOslo Gardermoen
26h 04m
2 stops
ONT11:34 pmOntario
$764
Delta
Aug 9
ONT10:00 pmOntario
33h 20m
2 stops
OSL4:20 pmOslo Gardermoen
Aug 24
OSL2:10 pmOslo Gardermoen
35h 14m
2 stops
ONT4:24 pmOntario
$769

United Airlines flights from Ontario to Oslo Gardermoen Airport

Our best United Airlines deals on Ontario to Oslo Gardermoen Airport flight tickets
United Airlines
Nov 10
ONT5:00 amOntario
27h 40m
2 stops
OSL5:40 pmOslo Gardermoen
Nov 12
OSL6:15 amOslo Gardermoen
22h 51m
2 stops
ONT8:06 pmOntario
$730
United Airlines
Nov 9
ONT6:36 pmOntario
36h 09m
2 stops
OSL3:45 pmOslo Gardermoen
Nov 12
OSL6:15 amOslo Gardermoen
23h 41m
2 stops
ONT8:56 pmOntario
$736
United Airlines
Nov 6
ONT1:13 pmOntario
19h 27m
2 stops
OSL5:40 pmOslo Gardermoen
Nov 20
OSL9:35 amOslo Gardermoen
19h 31m
2 stops
ONT8:06 pmOntario
$762

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 July 12, 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 11/10

5:00 am-5:40 pm

2 stops27h 40m

Oslo Gardermoen

Thu 11/12

6:15 am-8:06 pm

2 stops22h 51m

$730

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Mon 11/9

6:36 pm-3:45 pm

2 stops36h 09m

Oslo Gardermoen

Thu 11/12

6:15 am-8:56 pm

2 stops23h 41m

$736

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 11/1

7:00 am-2:15 pm

2 stops22h 15m

Oslo Gardermoen

Wed 11/11

8:50 pm-10:23 pm

2 stops34h 33m

$743

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Tue 12/1

9:59 am-10:40 pm

2 stops27h 41m

Oslo Gardermoen

Thu 12/10

7:05 am-11:55 pm

2 stops25h 50m

$747

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Wed 12/2

11:55 am-6:50 pm

2 stops21h 55m

Oslo Gardermoen

Thu 12/10

9:30 am-4:12 pm

2 stops39h 42m

$750

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Fri 11/6

1:13 pm-5:40 pm

2 stops19h 27m

Oslo Gardermoen

Fri 11/20

9:35 am-8:06 pm

2 stops19h 31m

$762
Quickest round-trip

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 8/9

6:39 pm-10:05 pm

2 stops18h 26m

Oslo Gardermoen

Mon 8/24

6:45 am-6:11 pm

2 stops20h 26m

$763

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Wed 8/5

12:00 pm-6:35 pm

2 stops21h 35m

Oslo Gardermoen

Wed 8/19

6:30 am-11:34 pm

2 stops26h 04m

$764

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 8/9

10:00 pm-4:20 pm

2 stops33h 20m

Oslo Gardermoen

Mon 8/24

2:10 pm-4:24 pm

2 stops35h 14m

$769

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Mon 11/30

6:00 am-5:30 pm

2 stops26h 30m

Oslo Gardermoen

Wed 12/9

1:55 pm-11:06 pm

2 stops18h 11m

$771

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?

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

What airlines fly to Oslo Gardermoen Airport?

Scandinavian Airlines, KLM and Lufthansa 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 46% of people opting to fly with this airline when traveling to Oslo Gardermoen Airport. Keep in mind that there are 9 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 41m

Direct flights

None
The fastest flight from Ontario to Oslo Gardermoen Airport takes 16h 41m
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 41m, 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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