HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Europe

$249+ Cheap flights from Ontario (ONT) to Europe

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
déc. 13 — déc. 201
sam. 12/13
sam. 12/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Europe with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Europe

Keep the following information in mind while searching for Ontario to Europe flight deals. Data was last updated novembre 13, 2025.

Round-trip from

$429
(American Airlines)

One-way from

$249
(Gurufare)

Popular in

June

Cheapest in

February

Average price

$858
From Ontario to Europe
Search Deals
One-way flight from Ontario to Europe
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($195 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Ontario to Europe

Cheapest flights from Ontario to Europe
Explore the most affordable flight options available from Ontario to Europe. Find the lowest fares from popular airlines and budget airlines, with prices last updated on novembre 13, 2025.

This American Airlines deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/316:10 amONT - MAD
1 stop18h 15mAmerican Airlines
mer. 2/181:00 pmMAD - ONT
1 stop33h 57mAmerican Airlines
Deal found 11/11$429
This Expedia deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/23:19 pmONT - MAD
2 stops18h 51mBritish Airways
mer. 12/106:45 amMAD - ONT
2 stops20h 32mBritish Airways
Deal found 11/11$447
This Delta deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/316:00 amONT - MAD
2 stops28h 10mDelta
mer. 2/1810:00 amMAD - ONT
2 stops22h 53mDelta
Deal found 11/11$461
This Delta deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 11/1410:25 pmONT - MAD
2 stops48h 35mDelta
mer. 12/311:00 amMAD - ONT
2 stops45h 58mDelta
Deal found 11/10$473
This Billigflug deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 11/287:05 amONT - MAD
1 stop15h 55mMultiple Airlines
ven. 12/1211:15 amMAD - ONT
1 stop32h 47mMultiple Airlines
Deal found 11/13$479
This Delta deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 12/410:25 pmONT - MAD
1 stop25h 50mDelta
mer. 12/1011:15 amMAD - ONT
1 stop20h 49mDelta
Deal found 11/11$480
This United Airlines deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/26:00 amONT - MAD
2 stops17h 00mUnited Airlines
mer. 12/108:30 amMAD - ONT
3 stops23h 19mUnited Airlines
Deal found 11/11$487
This United Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/35:05 amONT - FCO
2 stops18h 25mUnited Airlines
ven. 12/121:10 pmFCO - ONT
3 stops42h 39mUnited Airlines
Deal found 11/12$488
This United Airlines deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 11/309:35 pmONT - FCO
2 stops40h 25mUnited Airlines
ven. 12/121:10 pmFCO - ONT
3 stops42h 39mUnited Airlines
Deal found 11/10$489
This oojo deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 12/410:47 amONT - MAD
1 stop13h 38mBritish Airways
jeu. 12/111:00 pmMAD - ONT
1 stop17h 07mBritish Airways
Deal found 11/13$490
This United Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/127:00 amONT - MAD
2 stops17h 15mUnited Airlines
mer. 11/191:45 pmMAD - ONT
2 stops18h 06mUnited Airlines
Deal found 11/12$491
This KLM deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 11/267:05 amONT - FCO
1 stop15h 50mKLM
mer. 12/1010:05 amFCO - ONT
1 stop18h 34mKLM
Deal found 11/11$497

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Europe 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, Cheapflights users made 2,558,603 searches. Data last updated novembre 13, 2025.
Use the filters below to find and compare flights from Ontario to Europe that are best for you.

Fly from

Ontario

Fly to

Europe

Route

Depart

Return

Price

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

mer. 2/11

5:05 am-8:00 am

2 stops17h 55m

Madrid Barajas

mer. 2/18

5:55 am-8:50 pm

2 stops23h 55m

$487

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

mar. 12/9

6:00 am-9:15 am

2 stops18h 15m

Madrid Barajas

mar. 12/16

6:00 am-10:49 pm

2 stops25h 49m

$492

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

jeu. 12/4

10:25 pm-9:15 am

1 stop25h 50m

Madrid Barajas

jeu. 12/11

11:15 am-11:04 pm

1 stop20h 49m

$494

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

jeu. 12/4

10:25 pm-9:15 am

1 stop25h 50m

Madrid Barajas

mer. 12/10

10:00 am-11:04 pm

2 stops22h 04m

$499

OntarioRome

ONT - FCO

ONTFCO

Ontario

mar. 11/25

7:00 am-7:45 am

1 stop15h 45m

Rome Fiumicino

mar. 12/2

7:00 am-8:42 pm

2 stops22h 42m

$504

OntarioRome

ONT - FCO

ONTFCO

Ontario

jeu. 12/11

7:05 am-10:30 am

1 stop18h 25m

Rome Fiumicino

mer. 12/24

10:05 am-7:50 pm

1 stop18h 45m

$506

OntarioRome

ONT - FCO

ONTFCO

Ontario

mer. 11/26

7:05 am-10:30 am

1 stop18h 25m

Rome Fiumicino

ven. 12/5

12:40 pm-11:04 pm

1 stop19h 24m

$506

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

lun. 12/8

1:50 pm-8:00 am

2 stops33h 10m

Madrid Barajas

lun. 12/15

1:45 pm-8:42 pm

2 stops39h 57m

$506

OntarioLuqa

ONT - MLA

ONTMLA

Ontario

sam. 1/31

6:00 am-3:35 pm

2 stops24h 35m

Luqa Malta Intl

sam. 2/7

12:15 pm-10:53 pm

2 stops19h 38m

$507

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

mer. 1/7

5:05 am-4:00 pm

2 stops25h 55m

Madrid Barajas

mer. 2/11

8:30 am-12:38 pm

2 stops37h 08m

$507

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Ontario to Europe

Have a flexible travel schedule? Discover the best time to fly to Europe from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Europe

What is the cheapest month to book a flight from Ontario to Europe?

Currently, November is the cheapest month in which you can book a flight from Ontario to Europe (average of $342). Flying from Ontario to Europe in June is currently the most expensive (average of $582). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to EU?

Find hourly flight availability from Ontario to Europe. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated novembre 13, 2025.

One of the essential ways to save on airfare from Ontario to Europe is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 8% on airfare.

What is the cheapest day to fly from Ontario to Europe?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Europe. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Europe flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Europe

Get insights into the airlines that provide service to Europe. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Europe. Reviews last updated novembre 13, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Ontario to Europe have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,007 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
7.9
Good
8,007 reviews
Delta
7.9
Good
8,007 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
9,015 reviews
Delta
7.9
Good
8,007 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
11,050 reviews
Delta
7.9
Good
8,007 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
3,010 reviews
Delta
7.9
Good
8,007 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.7
Okay
7,516 reviews
Delta
7.9
Good
8,007 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Europe. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Europe?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Europe.

  • How long is the flight from Ontario to Europe?

    For as low as $487, United Airlines can have you in Europe from Ontario in 17h 55m. Airlines will cover a distance of 5790 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Ontario to Europe one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at $318. United Airlines flights start at $399 while deals on KLM start at $401 one-way.

  • What are the most popular routes from Ontario to Europe?

    The most popular route from Ontario to Europe is Ontario - Paris Charles de Gaulle. You may also consider Ontario - London Heathrow or Ontario - Rome Fiumicino.

  • Can I find deals for flights from Ontario to Europe that include hotel bookings?

    Yes. In addition to deals on Ontario to Europe flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Europe?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Europe.

  • Can I find deals for business class flights from Ontario to Europe?

    Yes. Cheapflights offers flight deals from Ontario to Europe by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Europe?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Europe (average of $342). Flying from Ontario to Europe in June is currently the most expensive (average of $582). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Europe

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Haneda flights
Los Angeles to Newark flights
San Francisco to John F Kennedy Intl flights
San Francisco to Newark flights
Los Angeles to Seattle flights
Los Angeles to LaGuardia flights
San Francisco to Las Vegas flights
Los Angeles to Honolulu flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to San Francisco flights
San Francisco to Los Angeles flights
Los Angeles to Narita flights
Los Angeles to Mexico City flights
Los Angeles to Cancún flights
Ontario to San Francisco flights
Los Angeles to Miami flights
San Francisco to Ontario flights
San Francisco to Haneda flights
San Francisco to LaGuardia flights
San Francisco to Honolulu flights
Los Angeles to Las Vegas flights
Los Angeles to Fort Lauderdale flights
San Francisco to Santa Ana flights
Los Angeles to Orlando flights
San Francisco to Dallas/Fort Worth flights
San Diego to John F Kennedy Intl flights
San Francisco to Seattle flights
San Francisco to Cancún flights
Burbank to Las Vegas flights
San Jose to Las Vegas flights
San Francisco to Mexico City flights
Ontario to Seattle flights
Los Angeles to Manila flights
Los Angeles to O'Hare Intl flights
San Francisco to Narita flights
Los Angeles to Heathrow flights
Los Angeles to San Jose flights
Santa Ana to San Francisco flights
Los Angeles to San Salvador flights
Los Angeles to Suvarnabhumi flights
Los Angeles to Hobby flights
Ontario to John F Kennedy Intl flights
Los Angeles to Boston flights
Santa Ana to Dallas/Fort Worth flights
Santa Ana to Las Vegas flights
San Jose to Los Angeles flights
San Francisco to O'Hare Intl flights
Santa Ana to Seattle flights
San Francisco to Kahului flights

Top 6 airlines flying from Ontario to Europe

Discover the top 6 airlines that operate flights from Ontario to Europe. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated novembre 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$879FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$489Average$855FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$489Average$947FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$515Average$831FlexibilityNo cancel feeOn-time69%
KLMCheapest$580Average$818FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$595Average$1,101FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.