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$253+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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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 June 30, 2025.

Round-trip from

$407
(Delta)

One-way from

$253
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$1,472
From Ontario to Europe
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One-way flight from Ontario to Europe
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Highest demand for flights based on searches. 14% potential increase in price ($185 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 30, 2025.

This Delta deal was found by Cheapflights users on 6/30. 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.
Wed 10/297:00 amONT - MAD
2 stops16h 00mDelta
Fri 11/710:00 amMAD - ONT
2 stops34h 24mDelta
Deal found 6/30$407
This KLM deal was found by Cheapflights users on 6/29. 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.
Thu 11/277:00 amONT - MAD
1 stop17h 00mKLM
Fri 12/511:00 amMAD - ONT
1 stop20h 41mKLM
Deal found 6/29$452
This Delta deal was found by Cheapflights users on 6/29. 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.
Tue 11/1810:59 pmONT - MXP
1 stop25h 06mDelta
Thu 12/411:05 amMXP - ONT
1 stop17h 37mDelta
Deal found 6/29$470
This KLM deal was found by Cheapflights users on 6/30. 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.
Tue 11/1110:59 pmONT - FCO
1 stop23h 56mKLM
Wed 11/1912:45 pmFCO - ONT
1 stop18h 56mKLM
Deal found 6/30$475
This Delta deal was found by Cheapflights users on 6/30. 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.
Tue 11/1110:59 pmONT - FCO
1 stop23h 56mDelta
Wed 11/1910:15 amFCO - ONT
2 stops33h 35mDelta
Deal found 6/30$480
This United Airlines deal was found by Cheapflights users on 6/28. 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 11/196:00 amONT - FCO
2 stops17h 55mUnited Airlines
Thu 11/2711:15 amFCO - ONT
2 stops34h 18mUnited Airlines
Deal found 6/28$490
This United Airlines deal was found by Cheapflights users on 6/29. 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 11/127:00 amONT - MXP
1 stop20h 50mUnited Airlines
Wed 11/193:05 pmMXP - ONT
1 stop16h 26mUnited Airlines
Deal found 6/29$491
This Air France deal was found by Cheapflights users on 6/29. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/127:05 amONT - MAD
1 stop17h 30mMultiple Airlines
Fri 8/2212:20 pmMAD - ONT
2 stops19h 00mMultiple Airlines
Deal found 6/29$492
This British Airways deal was found by Cheapflights users on 6/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:53 pmONT - MXP
2 stops16h 47mBritish Airways
Wed 11/1911:20 amMXP - ONT
2 stops21h 25mBritish Airways
Deal found 6/29$493
This oojo deal was found by Cheapflights users on 6/29. 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.
Wed 10/810:55 amONT - MAD
1 stop13h 10mBritish Airways
Wed 10/224:00 pmMAD - ONT
1 stop15h 42mBritish Airways
Deal found 6/29$496
This Air Canada deal was found by Cheapflights users on 6/29. 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.
Mon 12/15:40 amONT - FCO
2 stops20h 25mAir Canada
Tue 12/912:45 pmFCO - ONT
2 stops40h 58mAir Canada
Deal found 6/29$497
This Iberia deal was found by Cheapflights users on 6/28. 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 9/212:30 pmONT - MAD
1 stop14h 50mIberia
Wed 10/84:00 pmMAD - ONT
1 stop17h 02mIberia
Deal found 6/28$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 June 30, 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

OntarioMilan

ONT - MXP

ONTMXP

Ontario

Tue 11/18

10:59 pm-9:05 am

1 stop25h 06m

Milan Malpensa

Thu 12/4

11:05 am-7:42 pm

1 stop17h 37m

$470

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 11/11

10:59 pm-7:55 am

1 stop23h 56m

Rome Fiumicino

Wed 11/19

12:45 pm-10:41 pm

1 stop18h 56m

$475

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Mon 8/18

7:05 am-9:35 am

1 stop17h 30m

Madrid Barajas

Wed 8/27

10:05 am-7:11 pm

1 stop18h 06m

$475

OntarioRome

ONT - FCO

ONTFCO

Ontario

Tue 11/11

10:59 pm-7:05 am

2 stops23h 06m

Rome Fiumicino

Wed 11/19

10:15 am-10:50 am

2 stops33h 35m

$480

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Sun 9/14

10:00 pm-7:50 am

2 stops24h 50m

Madrid Barajas

Thu 9/25

12:40 pm-10:23 pm

2 stops18h 43m

$480

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 11/19

6:00 am-8:55 am

2 stops17h 55m

Rome Fiumicino

Thu 11/27

11:15 am-12:33 pm

2 stops34h 18m

$490

OntarioMilan

ONT - MXP

ONTMXP

Ontario

Wed 11/12

7:00 am-12:50 pm

1 stop20h 50m

Milan Malpensa

Wed 11/19

3:05 pm-10:31 pm

1 stop16h 26m

$491

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 8/12

7:05 am-9:35 am

1 stop17h 30m

Madrid Barajas

Fri 8/22

12:20 pm-10:20 pm

2 stops19h 00m

$492

OntarioMilan

ONT - MXP

ONTMXP

Ontario

Wed 11/12

12:53 pm-2:40 pm

2 stops16h 47m

Milan Malpensa

Wed 11/19

11:20 am-11:45 pm

2 stops21h 25m

$493

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 12/1

5:40 am-11:05 am

2 stops20h 25m

Rome Fiumicino

Tue 12/9

12:45 pm-8:43 pm

2 stops40h 58m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 60 results
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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 $919). 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 June 30, 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.

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 June 30, 2025.
See what other customers who have flown with Delta, KLM, and Qatar Airways 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
8.0
Very good
7,969 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

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
8.0
Very good
7,969 reviews
Delta
8.0
Very good
7,969 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

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.
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,969 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

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.
Qatar Airways
7.4
Good
3,596 reviews
Delta
8.0
Very good
7,969 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

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
8,852 reviews
Delta
8.0
Very good
7,969 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

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.
Etihad Airways
7.4
Good
1,224 reviews
Delta
8.0
Very good
7,969 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

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.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $318. KLM flights start at $337 while deals on JetBlue start at $381 one-way.

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

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

  • 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 $919). 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

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Alternative routes for Ontario to Europe

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Ontario to Europe

Discover the top 7 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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$489Average$882FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$492Average$904FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$504Average$944FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$544Average$831FlexibilityNo cancel feeOn-time70%
DeltaCheapest$566Average$886FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$608Average$915FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$629Average$889FlexibilityNo cancel feeOn-time72%

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