What is the cheapest airline that flies from Ontario to Europe?

British Airways, Air Canada, and United Airlines are the most popular carriers operating from Ontario to Europe

What airlines fly to Europe?

Iberia, British Airways and Delta are the top three most popular airlines that fly to Europe from Ontario according to our data. Iberia is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Europe. Keep in mind that there are 33 different airlines that fly to Europe on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to Europe?

Prices for flights from Ontario Airport to Europe are updated daily.

How many operators does momondo search for flights from Ontario Airport to Europe?

The number of operators available for flights from Ontario Airport to Europe is 7 as of December 2025.

How old do you have to be to fly from Ontario Airport to Europe?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Europe.

What documentation or ID do you need to fly to Europe?

The travel and health documents required for your trip to Europe can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Europe. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$226 Cheap Flights from Ontario to Europe in 2025/26

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Find the cheapest flights from Ontario to Europe

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

3:09 pm - 1:25 am

ONT

ATH

24h 16m2 stops

8:00 am - 10:48 pm

ATH

ONT

24h 48m2 stops

$490British Airways

Sat, Jan 17 - Sun, Jan 25

6:00 am - 8:10 am

ONT

LIS

18h 10m2 stops

10:55 am - 9:58 pm

LIS

ONT

43h 03m2 stops

$494United Airlines

Fri, Jan 30 - Fri, Feb 6

1:45 pm - 7:45 am

ONT

FCO

57h 00m2 stops

1:05 pm - 12:48 pm

FCO

ONT

56h 43m2 stops

$495United Airlines

Wed, Feb 25 - Tue, Mar 3

12:41 pm - 5:30 pm

ONT

LIS

20h 49m2 stops

5:00 am - 9:05 pm

LIS

ONT

24h 05m2 stops

$501Delta

Tue, Jan 13 - Thu, Jan 22

6:00 am - 1:35 pm

ONT

ATH

21h 35m2 stops

6:05 am - 10:37 pm

ATH

ONT

26h 32m2 stops

$501Delta

Mon, Feb 23 - Fri, Mar 6

10:58 am - 6:50 pm

ONT

ATH

21h 52m2 stops

7:50 pm - 5:22 pm

ATH

ONT

31h 32m2 stops

$504American Airlines

Sat, Jan 17 - Sun, Jan 25

5:06 pm - 5:45 pm

ONT

LIS

16h 39m2 stops

7:05 am - 10:49 pm

LIS

ONT

23h 44m2 stops

$507British Airways

Sun, Feb 15 - Fri, Feb 27

7:16 am - 3:50 pm

ONT

ATH

22h 34m2 stops

8:00 am - 10:13 pm

ATH

ONT

24h 13m3 stops

$509American Airlines

Sat, Jan 17 - Sun, Jan 25

10:58 am - 2:15 pm

ONT

MAD

18h 17m2 stops

12:40 pm - 10:48 pm

MAD

ONT

19h 08m1 stop

$519Iberia

Wed, Jan 14 - Wed, Jan 21

7:10 am - 6:15 am

ONT

MAD

14h 05m1 stop

12:55 am - 10:07 am

MAD

ONT

18h 12m1 stop

$523Iberia

Tue, Feb 24 - Mon, Mar 2

Iberia flights from Ontario to Europe

Our best Iberia deals on Ontario to Europe flight tickets

Iberia

Jan 14

ONT10:58 amOntario

18h 17m

2 stops

MAD2:15 pmMadrid Barajas

Jan 21

MAD12:40 pmMadrid Barajas

19h 08m

1 stop

ONT10:48 pmOntario

$519

Find similar

Iberia

Feb 24

ONT7:10 amOntario

14h 05m

1 stop

MAD6:15 amMadrid Barajas

Mar 2

MAD12:55 amMadrid Barajas

18h 12m

1 stop

ONT10:07 amOntario

$523

Find similar

Iberia

Feb 1

ONT6:00 amOntario

15h 15m

1 stop

MAD6:15 amMadrid Barajas

Feb 9

MAD12:55 amMadrid Barajas

18h 13m

1 stop

ONT10:08 amOntario

$525

Find similar

KLM flights from Ontario to Europe

Our best KLM deals on Ontario to Europe flight tickets

KLM

Feb 25

ONT10:20 pmOntario

27h 10m

1 stop

FCO10:30 amRome Fiumicino

Mar 3

FCO5:15 pmRome Fiumicino

31h 47m

2 stops

ONT4:02 pmOntario

$513

Find similar

KLM

Jan 19

ONT6:00 amOntario

25h 05m

2 stops

MAD4:05 pmMadrid Barajas

Feb 2

MAD1:05 pmMadrid Barajas

36h 10m

2 stops

ONT4:15 pmOntario

$536

Find similar

KLM

Apr 28

ONT12:00 pmOntario

37h 00m

1 stop

ATH11:00 amAthens Eleftherios V.

May 12

ATH9:10 amAthens Eleftherios V.

19h 05m

1 stop

ONT6:15 pmOntario

$584

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 1/17

3:09 pm-1:25 am

2 stops24h 16m

Athens Eleftherios V.

Sun 1/25

8:00 am-10:48 pm

2 stops24h 48m

$490

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 1/30

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Fri 2/6

10:55 am-9:58 pm

2 stops43h 03m

$494

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 2/25

1:45 pm-7:45 am

2 stops57h 00m

Rome Fiumicino

Tue 3/3

1:05 pm-12:48 pm

2 stops56h 43m

$495

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 1/13

12:41 pm-5:30 pm

2 stops20h 49m

Lisbon Humberto Delgado

Thu 1/22

5:00 am-9:05 pm

2 stops24h 05m

$501

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 2/23

6:00 am-1:35 pm

2 stops21h 35m

Athens Eleftherios V.

Fri 3/6

6:05 am-10:37 pm

2 stops26h 32m

$501

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 1/17

10:58 am-6:50 pm

2 stops21h 52m

Athens Eleftherios V.

Sun 1/25

7:50 pm-5:22 pm

2 stops31h 32m

$504

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sun 2/15

5:06 pm-5:45 pm

2 stops16h 39m

Lisbon Humberto Delgado

Fri 2/27

7:05 am-10:49 pm

2 stops23h 44m

$507

OntarioAthens

ONT - ATH

ONTATH

Ontario

Sat 1/17

7:16 am-3:50 pm

2 stops22h 34m

Athens Eleftherios V.

Sun 1/25

8:00 am-10:13 pm

3 stops24h 13m

$509

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 1/14

10:58 am-2:15 pm

2 stops18h 17m

Madrid Barajas

Wed 1/21

12:40 pm-10:48 pm

1 stop19h 08m

$519

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 2/24

7:10 am-6:15 am

1 stop14h 05m

Madrid Barajas

Mon 3/2

12:55 am-10:07 am

1 stop18h 12m

$523

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Europe

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

Prices

Airlines

What is the cheapest month to fly to Europe?

The cheapest month to fly to Europe from Ontario is in February. Flight prices, which tend to average around $657, are often lower during this time because this is during the off-season. If you aren’t able to travel to Europe during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $679.

What is the cheapest day to depart on your flight to Europe?

The cheapest day to depart from Ontario to Europe is on a Wednesday. Travelers who choose to depart for Europe on a Wednesday will often find tickets for as low as $668. Flights from Ontario to Europe on a Saturday will generally be more expensive and average around $1,112. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Europe?

According to our data, the cheapest time of day to fly to Europe is in the evening. momondo users have found flights departing from Ontario to Europe in the evening for as low as $662. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the morning because they tend to be around $871. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Europe?

You are more likely to see cheaper flights to Europe from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Europe for around $828 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Europe from Ontario for as low as $606 on momondo.

Can stopping save me money on Ontario to Europe flights?

You could potentially save up to 46% on your flight if you consider stops on a Ontario to Europe flight.

Cheap Ontario to Europe flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Europe

Fastest flight time	11h 58m
Direct flights	None

The fastest flight from Ontario to Europe takes 11h 58m

There are no direct flights from Ontario to Europe. There are no popular flight routes from Ontario to Europe.

Search flight deals

When did momondo last update prices for flights from Ontario Airport to Europe?
Prices for flights from Ontario Airport to Europe are updated daily.
How many operators does momondo search for flights from Ontario Airport to Europe?
The number of operators available for flights from Ontario Airport to Europe is 7 as of December 2025.
How old do you have to be to fly from Ontario Airport to Europe?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Europe.
What documentation or ID do you need to fly to Europe?
The travel and health documents required for your trip to Europe can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Europe. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to Europe

Compare and see reviews for airlines that fly from Ontario to Europe with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $444	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
Virgin Atlantic	PriceFrom $469	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights
Iberia	PriceFrom $497	Free Cancellation	Rating 7.0 3,050 reviews	Search Iberia flights
United Airlines	PriceFrom $515	Free Cancellation	Rating 7.4 9,091 reviews	Search United Airlines flights
British Airways	PriceFrom $517	Free Cancellation	Rating 6.7 7,585 reviews	Search British Airways flights
KLM	PriceFrom $580	Free Cancellation	Rating 7.7 1,430 reviews	Search KLM flights
American Airlines	PriceFrom $595	Free Cancellation	Rating 7.2 11,054 reviews	Search American Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Europe for you.

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

Flights from Ontario to Europe with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Ontario to Europe flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Europe from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.