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

British Airways, Delta, and Iberia 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 6 as of November 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.

$241 Cheap Flights from Ontario to Europe in 2025/26

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Find the cheapest flights from Ontario to Europe

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Cheap round-trip flights

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7:05 am - 9:15 amONT-MAD

17h 10m1 stop

11:15 am - 11:04 pmMAD-ONT

20h 49m1 stop

$438Delta

Find Deal

Tue, Dec 2 - Thu, Dec 11

10:47 am - 9:25 amONT-MAD

13h 38m1 stop

1:00 pm - 9:07 pmMAD-ONT

17h 07m1 stop

$466British Airways

Find Deal

Tue, Dec 2 - Thu, Dec 11

5:00 am - 8:00 amONT-MAD

18h 00m2 stops

12:35 pm - 10:25 pmMAD-ONT

41h 50m2 stops

$482United Airlines

Find Deal

Wed, Mar 4 - Wed, Mar 11

5:05 am - 8:00 amONT-MAD

17h 55m2 stops

6:00 am - 5:37 pmMAD-ONT

20h 37m2 stops

$487United Airlines

Find Deal

Tue, Dec 2 - Thu, Dec 11

11:59 pm - 9:25 amONT-MAD

24h 26m1 stop

1:00 pm - 10:48 pmMAD-ONT

18h 48m1 stop

$496British Airways

Find Deal

Mon, Jan 19 - Mon, Jan 26

6:00 am - 1:15 amONT-ATH

33h 15m2 stops

12:50 pm - 11:13 amATH-ONT

32h 23m2 stops

$512Delta

Find Deal

Mon, Dec 1 - Wed, Dec 10

11:59 pm - 9:25 amONT-MAD

24h 26m1 stop

1:00 pm - 10:08 amMAD-ONT

30h 08m1 stop

$513American Airlines

Find Deal

Mon, Jan 12 - Tue, Jan 27

7:10 am - 3:15 pmONT-ATH

22h 05m2 stops

3:55 pm - 1:57 pmATH-ONT

32h 02m2 stops

$517Iberia

Find Deal

Thu, Feb 12 - Fri, Feb 27

10:58 am - 8:15 pmONT-IST

22h 17m2 stops

7:35 am - 10:48 pmIST-ONT

26h 13m2 stops

$572American Airlines

Find Deal

Sat, Jan 17 - Sat, Jan 31

6:10 am - 9:45 amONT-BCN

18h 35m2 stops

9:15 pm - 1:57 pmBCN-ONT

49h 42m2 stops

$708Iberia

Find Deal

Thu, Feb 12 - Tue, Feb 17

Delta flights from Ontario to Europe

Our best Delta deals on Ontario to Europe flight tickets

Delta

Dec 2

ONT7:05 amOntario

17h 10m

1 stop

MAD9:15 amMadrid Barajas

Dec 11

MAD11:15 amMadrid Barajas

20h 49m

1 stop

ONT11:04 pmOntario

$438

Find similar

Delta

Dec 2

ONT6:00 amOntario

16h 55m

2 stops

FCO7:55 amRome Fiumicino

Dec 10

FCO12:40 pmRome Fiumicino

19h 24m

1 stop

ONT11:04 pmOntario

$511

Find similar

Delta

Dec 1

ONT6:00 amOntario

33h 15m

2 stops

ATH1:15 amAthens Eleftherios V.

Dec 10

ATH12:50 pmAthens Eleftherios V.

32h 23m

2 stops

ONT11:13 amOntario

$512

Find similar

British Airways flights from Ontario to Europe

Our best British Airways deals on Ontario to Europe flight tickets

British Airways

Dec 2

ONT10:47 amOntario

13h 38m

1 stop

MAD9:25 amMadrid Barajas

Dec 11

MAD1:00 pmMadrid Barajas

17h 07m

1 stop

ONT9:07 pmOntario

$466

Find similar

British Airways

Jan 19

ONT11:59 pmOntario

24h 26m

1 stop

MAD9:25 amMadrid Barajas

Jan 26

MAD1:00 pmMadrid Barajas

18h 48m

1 stop

ONT10:48 pmOntario

$496

Find similar

British Airways

Jan 12

ONT10:58 amOntario

18h 17m

2 stops

MAD2:15 pmMadrid Barajas

Jan 26

MAD12:55 amMadrid Barajas

22h 23m

1 stop

ONT2:18 pmOntario

$509

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

7:05 am-9:15 am

1 stop17h 10m

Madrid Barajas

Thu 12/11

11:15 am-11:04 pm

1 stop20h 49m

$438

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

10:47 am-9:25 am

1 stop13h 38m

Madrid Barajas

Thu 12/11

1:00 pm-9:07 pm

1 stop17h 07m

$466

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Wed 3/4

5:00 am-8:00 am

2 stops18h 00m

Madrid Barajas

Wed 3/11

12:35 pm-10:25 pm

2 stops41h 50m

$482

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 12/2

5:05 am-8:00 am

2 stops17h 55m

Madrid Barajas

Thu 12/11

6:00 am-5:37 pm

2 stops20h 37m

$487

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 1/19

11:59 pm-9:25 am

1 stop24h 26m

Madrid Barajas

Mon 1/26

1:00 pm-10:48 pm

1 stop18h 48m

$496

OntarioAthens

ONT - ATH

ONTATH

Ontario

Mon 12/1

6:00 am-1:15 am

2 stops33h 15m

Athens Eleftherios V.

Wed 12/10

12:50 pm-11:13 am

2 stops32h 23m

$512

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 1/12

11:59 pm-9:25 am

1 stop24h 26m

Madrid Barajas

Tue 1/27

1:00 pm-10:08 am

1 stop30h 08m

$513

OntarioAthens

ONT - ATH

ONTATH

Ontario

Thu 2/12

7:10 am-3:15 pm

2 stops22h 05m

Athens Eleftherios V.

Fri 2/27

3:55 pm-1:57 pm

2 stops32h 02m

$517

OntarioIstanbul

ONT - IST

ONTIST

Ontario

Sat 1/17

10:58 am-8:15 pm

2 stops22h 17m

Istanbul

Sat 1/31

7:35 am-10:48 pm

2 stops26h 13m

$572

OntarioBarcelona

ONT - BCN

ONTBCN

Ontario

Thu 2/12

6:10 am-9:45 am

2 stops18h 35m

Barcelona-El Prat

Tue 2/17

9:15 pm-1:57 pm

2 stops49h 42m

$708

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 October. Flight prices, which tend to average around $679, 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 October, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $684.

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 $834 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 34% 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

Direct flights	None

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 6 as of November 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 8,002 reviews	Search Delta flights
Iberia	PriceFrom $489	Free Cancellation	Rating 7.0 3,026 reviews	Search Iberia flights
British Airways	PriceFrom $489	Free Cancellation	Rating 6.7 7,533 reviews	Search British Airways flights
United Airlines	PriceFrom $515	Free Cancellation	Rating 7.4 9,020 reviews	Search United Airlines flights
KLM	PriceFrom $580	Free Cancellation	Rating 7.7 1,412 reviews	Search KLM flights
American Airlines	PriceFrom $595	Free Cancellation	Rating 7.2 11,046 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.