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$234+ 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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MAD
dic. 26 — ene. 21
vie. 12/26
vie. 1/2
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 noviembre 26, 2025.

Round-trip from

$430
(American Airlines)

One-way from

$234
(oojo)

Popular in

June

Cheapest in

February

Average price

$867
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. 15% potential increase in price ($196 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in November 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 noviembre 26, 2025.

This oojo deal was found by Cheapflights users on 11/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/304:47 pmONT - MXP
2 stops17h 58mBritish Airways
jue. 1/1511:30 amMXP - ONT
2 stops19h 43mBritish Airways
Deal found 11/25$447
This KLM deal was found by Cheapflights users on 11/26. 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.
mié. 12/37:05 amONT - FCO
1 stop15h 50mKLM
vie. 12/1210:05 amFCO - ONT
1 stop18h 34mKLM
Deal found 11/26$456
This Finnair deal was found by Cheapflights users on 11/26. 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.
mié. 12/39:59 amONT - FCO
2 stops15h 46mMultiple Airlines
vie. 12/121:10 pmFCO - ONT
2 stops31h 50mMultiple Airlines
Deal found 11/26$471
This United Airlines deal was found by Cheapflights users on 11/26. 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.
mié. 12/36:00 amONT - FCO
2 stops16h 45mUnited Airlines
vie. 12/121:10 pmFCO - ONT
3 stops42h 39mUnited Airlines
Deal found 11/26$487
This Delta deal was found by Cheapflights users on 11/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/307:05 amONT - MXP
1 stop17h 00mDelta
mar. 12/911:05 amMXP - ONT
1 stop20h 59mDelta
Deal found 11/24$491
This United Airlines deal was found by Cheapflights users on 11/24. 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.
lun. 12/17:00 amONT - MXP
1 stop21h 05mUnited Airlines
mar. 12/910:40 amMXP - ONT
2 stops21h 09mUnited Airlines
Deal found 11/24$494
This United Airlines deal was found by Cheapflights users on 11/25. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/26:00 amONT - MXP
2 stops16h 30mUnited Airlines
mié. 12/109:45 amMXP - ONT
3 stops22h 04mUnited Airlines
Deal found 11/25$495
This Delta deal was found by Cheapflights users on 11/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/2910:25 pmONT - MXP
1 stop25h 40mDelta
mar. 12/911:05 amMXP - ONT
1 stop17h 34mDelta
Deal found 11/24$496
This Delta deal was found by Cheapflights users on 11/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/257:05 amONT - FCO
1 stop18h 25mDelta
mar. 12/912:40 pmFCO - ONT
1 stop19h 24mDelta
Deal found 11/24$497
This United Airlines deal was found by Cheapflights users on 11/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/26:00 amONT - LIS
2 stops18h 10mUnited Airlines
mié. 12/106:10 amLIS - ONT
2 stops19h 27mUnited Airlines
Deal found 11/23$498
This United Airlines deal was found by Cheapflights users on 11/24. 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.
mié. 12/35:05 amONT - MXP
2 stops17h 25mUnited Airlines
mar. 12/910:40 amMXP - ONT
2 stops21h 09mUnited Airlines
Deal found 11/24$499
This United Airlines deal was found by Cheapflights users on 11/24. 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.
mié. 11/267:00 amONT - FCO
1 stop15h 45mUnited Airlines
mar. 12/99:45 amFCO - ONT
2 stops22h 04mUnited Airlines
Deal found 11/24$502

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 noviembre 26, 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

lun. 2/16

11:59 pm-9:25 am

1 stop24h 26m

Madrid Barajas

jue. 3/5

12:40 pm-10:31 pm

1 stop18h 51m

$448

OntarioMilan

ONT - MXP

ONTMXP

Ontario

mié. 3/4

5:06 pm-8:00 pm

2 stops17h 54m

Milan Malpensa

mié. 3/18

11:20 am-11:59 pm

2 stops20h 39m

$456

OntarioRome

ONT - FCO

ONTFCO

Ontario

mié. 1/21

6:00 am-9:45 am

2 stops18h 45m

Rome Fiumicino

mié. 2/4

12:00 pm-11:58 pm

2 stops20h 58m

$461

OntarioMilan

ONT - MXP

ONTMXP

Ontario

mié. 3/4

1:45 pm-9:55 am

2 stops35h 10m

Milan Malpensa

mié. 3/18

12:05 pm-10:25 pm

2 stops42h 20m

$467

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

dom. 1/11

10:30 pm-10:15 am

2 stops26h 45m

Madrid Barajas

mar. 1/27

10:00 am-11:31 am

2 stops34h 31m

$474

OntarioMilan

ONT - MXP

ONTMXP

Ontario

mar. 2/24

5:00 am-9:55 am

2 stops19h 55m

Milan Malpensa

vie. 3/6

9:10 am-10:25 pm

2 stops22h 15m

$490

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

sáb. 1/24

6:00 am-8:55 am

2 stops18h 55m

Lisbon Humberto Delgado

dom. 2/1

5:00 am-5:43 pm

2 stops20h 43m

$492

OntarioMilan

ONT - MXP

ONTMXP

Ontario

vie. 2/27

7:30 am-6:50 pm

2 stops26h 20m

Milan Malpensa

jue. 3/5

11:05 am-9:05 pm

1 stop19h 00m

$493

OntarioMilan

ONT - MXP

ONTMXP

Ontario

jue. 1/29

5:10 pm-11:40 am

2 stops33h 30m

Milan Malpensa

lun. 2/2

11:05 am-9:05 pm

1 stop19h 00m

$493

OntarioMilan

ONT - MXP

ONTMXP

Ontario

mar. 2/24

5:00 am-9:55 am

2 stops19h 55m

Milan Malpensa

mié. 3/4

10:35 am-10:57 pm

2 stops21h 22m

$494

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

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 $344). 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 noviembre 26, 2025.

One of the essential ways to save on airfare from Ontario to Europe is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 10% 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 noviembre 26, 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
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

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
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

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
9,046 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

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
11,038 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

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
3,034 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

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
7,539 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

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 $461, British Airways can have you in Europe from Ontario in 18h 45m. Airlines will cover a distance of 6303 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 $234. United Airlines flights start at $250 while deals on Air Canada start at $268 one-way.

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

    The most popular route from Ontario to Europe is Ontario - London Heathrow. You may also consider Ontario - Paris Charles de Gaulle 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 $344). 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

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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 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 noviembre 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$444Average$877FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$489Average$946FlexibilityNo cancel feeOn-time70%
IberiaCheapest$496Average$836FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$515Average$828FlexibilityNo cancel feeOn-time69%
KLMCheapest$580Average$818FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$595Average$1,051FlexibilityNo cancel feeOn-time71%

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