HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Europe

$327+ 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 6/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
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 March 25, 2025.

Round-trip from

$593
(British Airways)

One-way from

$327
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$971
From Ontario to Europe
Search Deals
One-way flight from Ontario to Europe
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($262 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 25, 2025.

This Finnair deal was found by Cheapflights users on 3/23. 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.
Sat 11/156:38 amONT - FCO
2 stops17h 22mMultiple Airlines
Sat 11/221:10 pmFCO - ONT
2 stops19h 35mMultiple Airlines
Deal found 3/23$507
This United deal was found by Cheapflights users on 3/25. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/316:00 amONT - FCO
1 stop22h 20mUnited Airlines
Tue 4/812:25 pmFCO - ONT
2 stops35h 52mUnited Airlines
Deal found 3/25$526
This KLM deal was found by Cheapflights users on 3/25. 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.
Mon 3/317:00 amONT - FCO
1 stop19h 05mKLM
Tue 4/811:35 amFCO - ONT
1 stop20h 01mKLM
Deal found 3/25$543
This Flightnetwork deal was found by Cheapflights users on 3/24. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2411:59 pmONT - FCO
1 stop27h 21mBritish Airways
Fri 4/410:00 amFCO - ONT
1 stop21h 10mBritish Airways
Deal found 3/24$561
This United Airlines deal was found by Cheapflights users on 3/24. 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 11/46:00 amONT - MAD
2 stops17h 05mUnited Airlines
Tue 11/1811:05 amMAD - ONT
2 stops20h 30mUnited Airlines
Deal found 3/24$565
This AirNGo deal was found by Cheapflights users on 3/25. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/17:00 amONT - FCO
1 stop15h 35mAir France
Tue 4/1511:35 amFCO - ONT
1 stop20h 01mAir France
Deal found 3/25$588
This Iberia deal was found by Cheapflights users on 3/24. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/223:00 pmONT - MAD
1 stop14h 20mIberia
Thu 11/134:00 pmMAD - ONT
1 stop16h 45mIberia
Deal found 3/24$593
This Iberia deal was found by Cheapflights users on 3/24. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1912:51 pmONT - DUB
1 stop12h 54mIberia
Wed 11/52:05 pmDUB - ONT
1 stop15h 55mIberia
Deal found 3/24$599
This United Airlines deal was found by Cheapflights users on 3/24. 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 10/127:00 amONT - DUB
1 stop18h 45mUnited Airlines
Sat 11/19:00 amDUB - ONT
2 stops20h 26mUnited Airlines
Deal found 3/24$610
This Iberia deal was found by Cheapflights users on 3/24. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/712:50 pmONT - LHR
1 stop14h 00mIberia
Tue 4/223:10 pmLHR - ONT
1 stop15h 00mIberia
Deal found 3/24$619
This Ticket deal was found by Cheapflights users on 3/24. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/712:42 pmONT - LHR
1 stop14h 28mKLM
Tue 4/2211:20 amLHR - ONT
1 stop16h 08mKLM
Deal found 3/24$620
This Flightnetwork deal was found by Cheapflights users on 3/24. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/74:35 pmONT - LHR
1 stop12h 15mBritish Airways
Tue 4/223:10 pmLHR - ONT
1 stop15h 00mBritish Airways
Deal found 3/24$638

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 March 25, 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

OntarioRome

ONT - FCO

ONTFCO

Ontario

Fri 4/4

7:00 am-8:05 am

1 stop16h 05m

Rome Fiumicino

Wed 4/9

10:00 am-6:29 pm

1 stop17h 29m

$593

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 4/7

12:50 pm-10:50 am

1 stop14h 00m

London Heathrow

Tue 4/22

4:25 pm-11:50 pm

1 stop15h 25m

$619

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 4/7

12:42 pm-11:10 am

1 stop14h 28m

London Heathrow

Tue 4/22

11:20 am-7:28 pm

1 stop16h 08m

$620

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 4/7

4:35 pm-12:50 pm

1 stop12h 15m

London Heathrow

Tue 4/22

3:10 pm-10:10 pm

1 stop15h 00m

$638

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 4/7

1:30 pm-9:50 am

1 stop12h 20m

London Heathrow

Tue 4/22

10:55 am-4:33 pm

1 stop13h 38m

$642

OntarioRome

ONT - FCO

ONTFCO

Ontario

Fri 4/4

7:00 am-8:05 am

1 stop16h 05m

Rome Fiumicino

Sun 4/6

10:00 am-10:10 pm

1 stop21h 10m

$643

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 4/7

12:42 pm-11:10 am

1 stop14h 28m

London Heathrow

Mon 4/14

7:45 pm-4:33 pm

2 stops28h 48m

$657

OntarioAmsterdam

ONT - AMS

ONTAMS

Ontario

Sun 5/18

7:30 am-8:00 am

1 stop15h 30m

Amsterdam Schiphol

Tue 6/3

10:55 am-6:36 pm

1 stop16h 41m

$658

OntarioAmsterdam

ONT - AMS

ONTAMS

Ontario

Tue 9/9

8:43 am-8:00 am

1 stop14h 17m

Amsterdam Schiphol

Tue 9/16

10:55 am-5:40 pm

1 stop15h 45m

$660

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 5/6

1:20 pm-12:20 pm

1 stop14h 00m

Rome Fiumicino

Tue 5/20

2:20 pm-8:53 pm

1 stop15h 33m

$662

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

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 $523). Flying from Ontario to Europe in June is currently the most expensive (average of $965). 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 March 25, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Europe as you normally would.

Rainfall in Europe by month

Plan your trip to Europe by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Europe ranges from 0.4 - 3.9 inches per month. December is typically the wettest month, when rainfall can reach 3.9 in. July is typically the driest time to visit Europe when rainfall is around 0.4 in.

Temperature in Europe by month

Plan your trip to Europe by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Europe, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

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 March 25, 2025.
China Airlines
8.2
Very good
723 reviews

Boarding

8.3

Overall

8.2

Crew

8.5

Food

7.8

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
China Airlines
8.2
Very good
723 reviews
China Airlines
8.2
Very good
723 reviews

Boarding

8.3

Overall

8.2

Crew

8.5

Food

7.8

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Delta
8.0
Very good
7,890 reviews
China Airlines
8.2
Very good
723 reviews

Boarding

8.3

Overall

8.2

Crew

8.5

Food

7.8

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Alaska Airlines
8.0
Very good
9,782 reviews
China Airlines
8.2
Very good
723 reviews

Boarding

8.3

Overall

8.2

Crew

8.5

Food

7.8

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
KLM
7.8
Good
1,318 reviews
China Airlines
8.2
Very good
723 reviews

Boarding

8.3

Overall

8.2

Crew

8.5

Food

7.8

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence
Qatar Airways
7.4
Good
3,540 reviews
China Airlines
8.2
Very good
723 reviews

Boarding

8.3

Overall

8.2

Crew

8.5

Food

7.8

Comfort

8.0

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Sopharith,Feb 2025

TPE - PNH

All are excellence, but we had to pay 150$ extra charge each person with our names in passports and tickets. It was just swiping between first names and last names. It might be our mistake when we bought the tickets, but I thought it was expensive just to swipe the names. Anyway, thanks a lot. All excellence

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.

  • 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 $393. JetBlue flights start at $394 while deals on United Airlines start at $408 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 $523). Flying from Ontario to Europe in June is currently the most expensive (average of $965). 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 Haneda flights
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Narita flights
Los Angeles to Honolulu flights
Los Angeles to Cancún flights
Los Angeles to LaGuardia flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
San Francisco to Newark flights
Los Angeles to O'Hare Intl flights
Los Angeles to Mexico City flights
San Francisco to Haneda flights
Los Angeles to Heathrow flights
Los Angeles to Miami flights
Los Angeles to Hobby flights
Los Angeles to Orlando flights
Los Angeles to Boston flights
Los Angeles to Las Vegas flights
San Francisco to Narita flights
Los Angeles to Manila flights
San Francisco to Los Angeles flights
San Francisco to Las Vegas flights
San Francisco to LaGuardia flights
San Jose to Los Angeles flights
San Francisco to Heathrow flights
Los Angeles to Dallas/Fort Worth flights
San Diego to Seattle flights
Ontario to Seattle flights
Los Angeles to Reagan-National flights
San Francisco to Honolulu flights
San Francisco to Seattle flights
Los Angeles to Dulles Intl flights
Los Angeles to Fort Lauderdale flights
Los Angeles to Portland flights
Burbank to Newark flights
Los Angeles to San Francisco flights
San Francisco to Cancún flights
Los Angeles to George Bush Intcntl flights
Burbank to Las Vegas flights
Santa Ana to Seattle flights
San Francisco to Boston flights
Burbank to Seattle flights
Oakland to Los Angeles flights
Santa Ana to Las Vegas flights
San Francisco to O'Hare Intl flights
San Francisco to Charles de Gaulle flights
Los Angeles to Suvarnabhumi flights
Los Angeles to Nashville flights
San Francisco to Manila flights

Top 8 airlines flying from Ontario to Europe

Discover the top 8 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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest$454Average$889FlexibilityNo cancel feeOn-time72%
KLMCheapest$481Average$863FlexibilityNo cancel feeOn-time75%
DeltaCheapest$482Average$918FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$489Average$865FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$492Average$949FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$504Average$998FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$551Average$878FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$690Average$1,139FlexibilityNo cancel feeOn-time67%
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.