Europe

$236+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPH
Apr 7 — Apr 141
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Cheap 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 8, 2026.

This British Airways deal was found by Cheapflights users on 3/3. 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.
Tue 4/142:08 pm
ONT
-
MAD
2 stops18h 22m
British Airways
Fri 4/2410:25 am
MAD
-
ONT
1 stop19h 42m
British Airways
Deal found 3/3$542
This Finnair deal was found by Cheapflights users on 3/3. 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.
Tue 12/17:00 am
ONT
-
MAD
1 stop14h 15m
Multiple Airlines
Wed 12/912:00 pm
MAD
-
ONT
2 stops19h 19m
Multiple Airlines
Deal found 3/3$550
This Delta deal was found by Cheapflights users on 3/3. 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 12/16:00 am
ONT
-
MAD
2 stops26h 40m
Delta
Wed 12/96:00 am
MAD
-
ONT
2 stops19h 12m
Delta
Deal found 3/3$551
This oojo deal was found by Cheapflights users on 3/3. 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.
Tue 8/1812:47 pm
ONT
-
FCO
2 stops18h 38m
British Airways
Wed 8/261:10 pm
FCO
-
ONT
1 stop19h 58m
British Airways
Deal found 3/3$564
This United Airlines deal was found by Cheapflights users on 3/4. 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.
Sat 4/186:49 pm
ONT
-
FCO
2 stops42h 11m
United Airlines
Thu 4/307:10 am
FCO
-
ONT
2 stops24h 25m
United Airlines
Deal found 3/4$565
This oojo deal was found by Cheapflights users on 3/6. 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 8/128:15 am
ONT
-
FCO
1 stop18h 50m
British Airways
Wed 8/261:10 pm
FCO
-
ONT
1 stop18h 04m
British Airways
Deal found 3/6$572
This Delta deal was found by Cheapflights users on 3/3. 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 4/1512:49 pm
ONT
-
MAD
1 stop14h 26m
Delta
Tue 4/286:00 am
MAD
-
ONT
2 stops20h 15m
Delta
Deal found 3/3$572
This oojo deal was found by Cheapflights users on 3/3. 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.
Tue 4/1411:59 pm
ONT
-
MAD
1 stop24h 06m
British Airways
Tue 4/2110:25 am
MAD
-
ONT
1 stop19h 02m
British Airways
Deal found 3/3$573
This United Airlines deal was found by Cheapflights users on 3/3. 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.
Mon 4/137:00 am
ONT
-
MAD
2 stops16h 05m
United Airlines
Wed 4/295:55 am
MAD
-
ONT
2 stops25h 50m
United Airlines
Deal found 3/3$575
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Mon 11/237:00 am
ONT
-
FCO
1 stop15h 45m
United Airlines
Fri 12/119:45 am
FCO
-
ONT
2 stops19h 35m
United Airlines
Deal found 3/8$576
This oojo deal was found by Cheapflights users on 3/3. 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.
Sun 4/1912:19 pm
ONT
-
LIS
2 stops37h 46m
British Airways
Tue 5/54:30 pm
LIS
-
ONT
2 stops31h 52m
British Airways
Deal found 3/3$577
This Delta deal was found by Cheapflights users on 3/8. 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 12/27:00 am
ONT
-
FCO
1 stop18h 30m
Delta
Tue 12/812:45 pm
FCO
-
ONT
2 stops36h 27m
Delta
Deal found 3/8$577

Find 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 8, 2026.

Round-trip from

$542
(British Airways)

One-way from

$236
(oojo)
From Ontario to Europe
One-way flight from Ontario to Europe

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 8, 2026.
Use the filters below to find and compare flights from Ontario to Europe that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 8/18

7:00 am-12:15 pm

1 stop20h 15m

Madrid Barajas

Tue 9/8

6:00 am-4:14 pm

2 stops19h 14m

$572

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 3/23

11:59 pm-10:15 am

2 stops27h 16m

Lisbon Humberto Delgado

Wed 4/1

10:25 am-10:31 pm

2 stops20h 06m

$582

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 4/21

6:00 am-2:25 pm

1 stop23h 25m

Madrid Barajas

Tue 4/28

3:55 pm-10:09 am

1 stop27h 14m

$600

OntarioMadrid

ONT - MAD

ONTMAD

Ontario

Tue 4/14

7:00 am-8:05 am

2 stops16h 05m

Madrid Barajas

Wed 4/22

11:15 am-10:31 pm

2 stops20h 16m

$600

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 3/30

11:05 am-1:40 pm

1 stop17h 35m

Rome Fiumicino

Tue 4/7

9:45 am-10:31 pm

1 stop21h 46m

$637

OntarioRome

ONT - FCO

ONTFCO

Ontario

Wed 4/29

1:27 pm-1:25 pm

1 stop14h 58m

Rome Fiumicino

Wed 5/6

3:40 pm-10:59 pm

1 stop16h 19m

$637

OntarioRome

ONT - FCO

ONTFCO

Ontario

Mon 4/20

5:10 am-12:20 pm

1 stop22h 10m

Rome Fiumicino

Mon 4/27

12:25 pm-8:36 pm

2 stops41h 11m

$652

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 4/14

6:05 am-8:20 am

2 stops18h 15m

Lisbon Humberto Delgado

Tue 4/21

10:25 am-10:31 pm

2 stops20h 06m

$682

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 4/14

6:05 am-8:20 am

2 stops18h 15m

Lisbon Humberto Delgado

Thu 4/23

10:25 am-9:50 pm

2 stops19h 25m

$682

OntarioAthens

ONT - ATH

ONTATH

Ontario

Tue 5/5

5:55 pm-7:50 am

2 stops27h 55m

Athens Eleftherios V.

Thu 5/14

3:30 pm-10:57 am

2 stops29h 27m

$698

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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, October is the cheapest month in which you can book a flight from Ontario to Europe (average of $448). Flying from Ontario to Europe in June is currently the most expensive (average of $743). 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.

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 8, 2026.
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.

Overall

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

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.

Overall

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

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.

Overall

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

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.

Overall

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

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.

Overall

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

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.

Overall

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Comfort

7.9

Food

7.2

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.

  • How long is the flight from Ontario to Europe?

    For as low as $702, Delta can have you in Europe from Ontario in 17h 45m. Airlines will cover a distance of 5132 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 American Airlines, which is currently one of the cheapest options available, starting at $379. Iberia flights start at $382 while deals on United Airlines start at $404 one-way.

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

  • 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, October is the cheapest month in which you can book a flight from Ontario to Europe (average of $448). Flying from Ontario to Europe in June is currently the most expensive (average of $743). 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.

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 March 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$439Average$812FlexibilityNo cancel feeOn-time71%
DeltaCheapest$444Average$888FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$497Average$862FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$504Average$989FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$515Average$915FlexibilityNo cancel feeOn-time69%
KLMCheapest$580Average$947FlexibilityNo cancel feeOn-time75%

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