HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Europe

$233+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Dec 11 — Dec 181
Thu 12/11
Thu 12/18
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 November 11, 2025.

Round-trip from

$440
(oojo)

One-way from

$233
(Travelocity)

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 November 11, 2025.

This Delta deal was found by Cheapflights users on 11/9. 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.
Mon 12/110:25 pmONT - MAD
1 stop25h 50mDelta
Thu 1/2210:00 amMAD - ONT
2 stops20h 07mDelta
Deal found 11/9$448
This oojo deal was found by Cheapflights users on 11/9. 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.
Mon 12/111:59 pmONT - MAD
1 stop24h 26mBritish Airways
Wed 12/1010:35 amMAD - ONT
2 stops20h 53mBritish Airways
Deal found 11/9$464
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.
Fri 11/1410:25 pmONT - MAD
2 stops48h 35mDelta
Wed 12/311:00 amMAD - ONT
2 stops45h 58mDelta
Deal found 11/10$473
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Sun 11/309:35 pmONT - FCO
2 stops25h 10mUnited Airlines
Fri 12/121:10 pmFCO - ONT
3 stops42h 39mUnited Airlines
Deal found 11/9$487
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.
Wed 12/105:05 amONT - MAD
2 stops17h 55mUnited Airlines
Wed 12/241:35 pmMAD - ONT
2 stops32h 03mUnited Airlines
Deal found 11/10$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.
Tue 12/25:05 amONT - MAD
2 stops18h 00mUnited Airlines
Tue 12/99:05 amMAD - ONT
2 stops22h 44mUnited Airlines
Deal found 11/10$491
This Delta deal was found by Cheapflights users on 11/9. 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.
Thu 11/277:05 amONT - MAD
1 stop17h 10mDelta
Tue 1/2011:15 amMAD - ONT
1 stop33h 39mDelta
Deal found 11/9$493
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.
Fri 11/141:29 pmONT - MAD
2 stops57h 36mUnited Airlines
Wed 12/36:25 amMAD - ONT
3 stops25h 24mUnited Airlines
Deal found 11/10$500
This Air Canada deal was found by Cheapflights users on 11/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/299:35 pmONT - FCO
2 stops52h 20mAir Canada
Thu 12/1110:55 amFCO - ONT
2 stops42h 47mAir Canada
Deal found 11/9$501
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.
Sun 11/167:00 amONT - FCO
1 stop15h 45mUnited Airlines
Tue 11/259:45 amFCO - ONT
2 stops22h 06mUnited Airlines
Deal found 11/10$502
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Sun 12/76:00 amONT - FCO
2 stops17h 30mUnited Airlines
Sun 12/1412:20 pmFCO - ONT
2 stops19h 29mUnited Airlines
Deal found 11/9$504
This Finnair deal was found by Cheapflights users on 11/9. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1110:47 amONT - FCO
1 stop14h 58mMultiple Airlines
Thu 12/181:10 pmFCO - ONT
1 stop19h 36mMultiple Airlines
Deal found 11/9$506

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 November 11, 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

Tue 2/17

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Fri 2/27

11:15 am-9:07 pm

1 stop18h 52m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 2/17

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Tue 2/24

11:15 am-9:07 pm

1 stop18h 52m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 2/17

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Wed 2/25

11:15 am-9:07 pm

1 stop18h 52m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sun 2/15

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Fri 2/27

11:15 am-9:07 pm

1 stop18h 52m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 2/23

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Wed 3/4

11:15 am-9:07 pm

1 stop18h 52m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sun 2/15

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Wed 2/25

11:15 am-9:07 pm

1 stop18h 52m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 2/24

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Fri 3/6

11:15 am-9:07 pm

1 stop18h 52m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 2/17

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Thu 2/26

11:15 am-9:07 pm

1 stop18h 52m

$443

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 2/24

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Thu 3/5

10:00 am-9:07 pm

2 stops20h 07m

$448

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 2/24

10:20 pm-9:15 am

1 stop25h 55m

Madrid Barajas

Wed 3/4

10:00 am-9:07 pm

2 stops20h 07m

$448

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

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 November 11, 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 November 11, 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
8,005 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

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
8,005 reviews
Delta
7.9
Good
8,005 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

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
9,012 reviews
Delta
7.9
Good
8,005 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

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
11,047 reviews
Delta
7.9
Good
8,005 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

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
3,008 reviews
Delta
7.9
Good
8,005 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

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
7,511 reviews
Delta
7.9
Good
8,005 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

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 $510, Delta can have you in Europe from Ontario in 20h 05m. Airlines will cover a distance of 6698 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 Newark flights
Los Angeles to Haneda flights
San Francisco to John F Kennedy Intl flights
San Francisco to Newark flights
San Francisco to Las Vegas flights
Los Angeles to Honolulu flights
Los Angeles to Seattle flights
Los Angeles to LaGuardia flights
Los Angeles to Narita flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Cancún flights
Los Angeles to San Francisco flights
Los Angeles to Mexico City flights
San Francisco to Los Angeles flights
San Francisco to Haneda flights
San Francisco to Honolulu flights
Ontario to Seattle flights
San Francisco to LaGuardia flights
Los Angeles to Orlando flights
Los Angeles to Miami flights
Los Angeles to Las Vegas flights
San Francisco to Seattle flights
Los Angeles to Suvarnabhumi flights
San Francisco to Mexico City flights
Ontario to San Francisco flights
San Francisco to Dallas/Fort Worth flights
Los Angeles to Manila flights
Los Angeles to San Salvador flights
Los Angeles to Fort Lauderdale flights
San Francisco to Narita flights
San Diego to John F Kennedy Intl flights
Santa Ana to San Francisco flights
Los Angeles to Heathrow flights
Los Angeles to O'Hare Intl flights
San Francisco to O'Hare Intl flights
San Francisco to Cancún flights
San Francisco to Manila flights
San Francisco to Miami flights
San Jose to Las Vegas flights
Los Angeles to San Jose flights
Los Angeles to Kahului flights
San Francisco to Kahului flights
Los Angeles to Charles de Gaulle flights
Burbank to Las Vegas flights
Los Angeles to Boston flights
Los Angeles to Reagan-National flights
Los Angeles to Hobby flights
San Francisco to Ontario flights
Los Angeles to Dulles Intl 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 November 11, 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.