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Cheap flights from Ontario to Oslo from $421

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 3/23. 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
1:34 pm - 5:55 pm
ONT
-
OSL
19h 21m
2 stops
United Airlines Logo
6:35 am - 10:26 pm
OSL
-
ONT
24h 51m
2 stops
$544United Airlines
Wed, Apr 15 - Wed, Apr 29
United Airlines Logo
6:00 am - 5:55 pm
ONT
-
OSL
26h 55m
2 stops
United Airlines Logo
6:45 am - 10:59 pm
OSL
-
ONT
25h 14m
2 stops
$546United Airlines
Thu, Apr 16 - Thu, Apr 30
United Airlines Logo
1:34 pm - 5:55 pm
ONT
-
OSL
19h 21m
2 stops
United Airlines Logo
6:45 am - 10:26 pm
OSL
-
ONT
24h 41m
2 stops
$548United Airlines
Thu, Apr 16 - Thu, Apr 23
United Airlines Logo
5:15 am - 5:30 pm
ONT
-
OSL
28h 15m
2 stops
United Airlines Logo
6:35 am - 10:26 pm
OSL
-
ONT
24h 51m
2 stops
$557United Airlines
Wed, Mar 25 - Wed, Apr 1
United Airlines Logo
5:10 am - 6:25 pm
ONT
-
OSL
28h 15m
2 stops
United Airlines Logo
6:25 am - 10:26 pm
OSL
-
ONT
25h 01m
2 stops
$559United Airlines
Sun, Apr 12 - Sun, Apr 26
United Airlines Logo
7:00 am - 10:55 am
ONT
-
OSL
18h 55m
2 stops
United Airlines Logo
1:05 pm - 11:06 pm
OSL
-
ONT
19h 01m
2 stops
$572United Airlines
Thu, Aug 20 - Thu, Sep 3
United Airlines Logo
11:59 pm - 3:20 pm
ONT
-
OSL
31h 21m
2 stops
United Airlines Logo
9:55 am - 10:26 pm
OSL
-
ONT
45h 31m
2 stops
$577United Airlines
Tue, Mar 24 - Tue, Mar 31
United Airlines Logo
10:37 am - 3:35 pm
ONT
-
OSL
19h 58m
2 stops
United Airlines Logo
7:10 am - 5:56 pm
OSL
-
ONT
19h 46m
2 stops
$582United Airlines
Sun, May 10 - Thu, May 28
United Airlines Logo
11:59 pm - 5:10 pm
ONT
-
OSL
33h 11m
2 stops
United Airlines Logo
6:55 am - 9:50 pm
OSL
-
ONT
23h 55m
2 stops
$619United Airlines
Sun, Mar 22 - Tue, Apr 28
United Airlines Logo
7:00 am - 5:15 pm
ONT
-
OSL
25h 15m
2 stops
United Airlines Logo
9:55 am - 9:50 pm
OSL
-
ONT
20h 55m
2 stops
$622United Airlines
Sun, Mar 29 - Sun, Apr 5

Delta flights from Ontario to Oslo Gardermoen Airport

Our best Delta deals on Ontario to Oslo Gardermoen Airport flight tickets
Delta
May 26
ONT5:50 pmOntario
17h 50m
2 stops
OSL8:40 pmOslo Gardermoen
Jun 4
OSL6:30 amOslo Gardermoen
26h 04m
2 stops
ONT11:34 pmOntario
$633
Delta
May 26
ONT11:52 amOntario
23h 48m
2 stops
OSL8:40 pmOslo Gardermoen
Jun 5
OSL6:30 amOslo Gardermoen
26h 04m
2 stops
ONT11:34 pmOntario
$683
Delta
May 26
ONT6:45 amOntario
41h 00m
2 stops
OSL8:45 amOslo Gardermoen
Jun 6
OSL6:30 amOslo Gardermoen
19h 33m
2 stops
ONT5:03 pmOntario
$694

United Airlines flights from Ontario to Oslo Gardermoen Airport

Our best United Airlines deals on Ontario to Oslo Gardermoen Airport flight tickets
United Airlines
Apr 15
ONT1:34 pmOntario
19h 21m
2 stops
OSL5:55 pmOslo Gardermoen
Apr 29
OSL6:35 amOslo Gardermoen
24h 51m
2 stops
ONT10:26 pmOntario
$544
United Airlines
Apr 16
ONT6:00 amOntario
26h 55m
2 stops
OSL5:55 pmOslo Gardermoen
Apr 30
OSL6:45 amOslo Gardermoen
25h 14m
2 stops
ONT10:59 pmOntario
$546
United Airlines
Apr 16
ONT1:34 pmOntario
19h 21m
2 stops
OSL5:55 pmOslo Gardermoen
Apr 23
OSL6:45 amOslo Gardermoen
24h 41m
2 stops
ONT10:26 pmOntario
$548

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 February 24, 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

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Wed 4/15

1:34 pm-5:55 pm

2 stops19h 21m

Oslo Gardermoen

Wed 4/29

6:35 am-10:26 pm

2 stops24h 51m

$544

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Thu 4/16

6:00 am-5:55 pm

2 stops26h 55m

Oslo Gardermoen

Thu 4/30

6:45 am-10:59 pm

2 stops25h 14m

$546

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Thu 4/16

1:34 pm-5:55 pm

2 stops19h 21m

Oslo Gardermoen

Thu 4/23

6:45 am-10:26 pm

2 stops24h 41m

$548

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Wed 3/25

5:15 am-5:30 pm

2 stops28h 15m

Oslo Gardermoen

Wed 4/1

6:35 am-10:26 pm

2 stops24h 51m

$557

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 4/12

5:10 am-6:25 pm

2 stops28h 15m

Oslo Gardermoen

Sun 4/26

6:25 am-10:26 pm

2 stops25h 01m

$559

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Thu 8/20

7:00 am-10:55 am

2 stops18h 55m

Oslo Gardermoen

Thu 9/3

1:05 pm-11:06 pm

2 stops19h 01m

$572

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Tue 3/24

11:59 pm-3:20 pm

2 stops31h 21m

Oslo Gardermoen

Tue 3/31

9:55 am-10:26 pm

2 stops45h 31m

$577

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 5/10

10:37 am-3:35 pm

2 stops19h 58m

Oslo Gardermoen

Thu 5/28

7:10 am-5:56 pm

2 stops19h 46m

$582

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 3/22

11:59 pm-5:10 pm

2 stops33h 11m

Oslo Gardermoen

Tue 4/28

6:55 am-9:50 pm

2 stops23h 55m

$619

OntarioOslo

ONT - OSL

ONTOSL

Ontario

Sun 3/29

7:00 am-5:15 pm

2 stops25h 15m

Oslo Gardermoen

Sun 4/5

9:55 am-9:50 pm

2 stops20h 55m

$622

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 is the most popular carrier operating from Ontario to Oslo Gardermoen

What airlines fly to Oslo Gardermoen Airport?

Scandinavian Airlines, Lufthansa and British Airways 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 44% of people opting to fly with this airline when traveling to Oslo Gardermoen Airport. Keep in mind that there are 10 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

18h 49m

Direct flights

None
The fastest flight from Ontario to Oslo Gardermoen Airport takes 18h 49m
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

  • 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 18h 49m, 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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