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Ontario

$535+ Cheap flights from Europe to Ontario (ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — ONT
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Europe to Ontario

Keep the following information in mind while searching for Europe to Ontario flight deals. Data was last updated July 3, 2025.

Round-trip from

$535
(United Airlines)

Popular in

August

Cheapest in

February

Average price

$867
From Europe to Ontario
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($138 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
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Find flight deals from Europe to Ontario

Cheapest flights from Europe to Ontario
Explore the most affordable flight options available from Europe to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This United Airlines deal was found by Cheapflights users on 7/1. 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 9/237:20 amCDG - ONT
2 stops19h 17mUnited Airlines
Tue 10/219:36 amONT - CDG
1 stop15h 49mUnited Airlines
Deal found 7/1$535
This Lufthansa deal was found by Cheapflights users on 7/2. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:20 amCDG - ONT
2 stops19h 20mMultiple Airlines
Fri 10/311:40 pmONT - CDG
2 stops21h 10mMultiple Airlines
Deal found 7/2$539
This British Airways deal was found by Cheapflights users on 7/1. 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.
Mon 9/87:55 amCDG - ONT
2 stops19h 59mBritish Airways
Sun 9/218:15 amONT - CDG
2 stops17h 50mBritish Airways
Deal found 7/1$559
This Netflights deal was found by Cheapflights users on 7/3. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/610:30 amLHR - ONT
1 stop20h 03mBritish Airways
Sat 9/138:15 amONT - LHR
1 stop16h 45mBritish Airways
Deal found 7/3$561
This Ticket deal was found by Cheapflights users on 7/2. 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.
Sun 8/245:25 pmLHR - ONT
1 stop33h 46mKLM
Tue 9/97:05 amONT - LHR
1 stop15h 40mKLM
Deal found 7/2$563
This Air Canada deal was found by Cheapflights users on 7/1. 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 9/89:00 amCDG - ONT
2 stops20h 43mAir Canada
Mon 9/225:10 amONT - CDG
2 stops16h 40mAir Canada
Deal found 7/1$565
This AirNGo deal was found by Cheapflights users on 7/2. 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.
Fri 8/2210:55 amFRA - ONT
1 stop20h 53mBritish Airways
Sun 9/72:30 pmONT - FRA
1 stop33h 15mBritish Airways
Deal found 7/2$576
This Billigflug deal was found by Cheapflights users on 7/1. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1410:55 amFRA - ONT
1 stop20h 19mMultiple Airlines
Mon 8/182:57 pmONT - FRA
2 stops22h 28mMultiple Airlines
Deal found 7/1$579
This The Travel House deal was found by Cheapflights users on 7/3. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/412:00 pmLHR - ONT
1 stop14h 54mFinnair
Tue 9/910:53 amONT - LHR
1 stop15h 57mFinnair
Deal found 7/3$579
This Iberia deal was found by Cheapflights users on 7/3. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/249:15 amLHR - ONT
2 stops22h 53mIberia
Tue 9/912:45 pmONT - LHR
1 stop17h 40mIberia
Deal found 7/3$585
This Delta deal was found by Cheapflights users on 7/3. 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.
Sun 8/246:30 amLHR - ONT
2 stops23h 50mDelta
Tue 9/97:05 amONT - LHR
2 stops16h 10mDelta
Deal found 7/3$586
This Iberia deal was found by Cheapflights users on 7/1. 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.
Sat 9/65:50 amCDG - ONT
2 stops25h 43mIberia
Sat 9/2010:53 amONT - CDG
1 stop14h 07mIberia
Deal found 7/1$597

Cheapflights Fare Finder

Customize your flight search to find flights from Europe to Ontario 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 July 3, 2025.
Use the filters below to find and compare flights from Europe to Ontario that are best for you.

Fly from

Europe

Fly to

Ontario

Route

Depart

Return

Price

ParisOntario

CDG - ONT

CDGONT

Paris Charles de Gaulle

Tue 9/23

7:20 am-5:37 pm

2 stops19h 17m

Ontario

Sat 10/25

9:36 am-10:40 am

1 stop16h 04m

$535

ParisOntario

CDG - ONT

CDGONT

Paris Charles de Gaulle

Sat 10/25

7:20 am-5:40 pm

2 stops19h 20m

Ontario

Fri 10/31

1:40 pm-6:50 pm

2 stops21h 10m

$539

ParisOntario

CDG - ONT

CDGONT

Paris Charles de Gaulle

Mon 9/8

7:55 am-6:54 pm

2 stops19h 59m

Ontario

Sun 9/21

8:15 am-11:05 am

2 stops17h 50m

$559

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 9/6

10:30 am-10:33 pm

1 stop20h 03m

Ontario

Sat 9/13

8:15 am-9:00 am

1 stop16h 45m

$561

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 8/24

5:25 pm-7:11 pm

1 stop33h 46m

Ontario

Tue 9/9

7:05 am-6:45 am

1 stop15h 40m

$563

ParisOntario

CDG - ONT

CDGONT

Paris Charles de Gaulle

Mon 9/8

9:00 am-8:43 pm

2 stops20h 43m

Ontario

Mon 9/22

5:10 am-6:50 am

2 stops16h 40m

$565

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Fri 8/22

10:55 am-10:48 pm

1 stop20h 53m

Ontario

Sun 9/7

2:30 pm-8:45 am

1 stop33h 15m

$576

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 9/4

12:00 pm-6:54 pm

1 stop14h 54m

Ontario

Tue 9/9

10:53 am-10:50 am

1 stop15h 57m

$579

Frankfurt am MainOntario

FRA - ONT

FRAONT

Frankfurt am Main

Thu 8/14

10:55 am-10:14 pm

1 stop20h 19m

Ontario

Mon 8/18

2:57 pm-10:25 pm

2 stops22h 28m

$579

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 8/24

9:15 am-12:08 am

2 stops22h 53m

Ontario

Tue 9/9

12:45 pm-2:25 pm

1 stop17h 40m

$585

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 60 results
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Best time to book a flight from Europe to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Europe 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 Europe to Ontario

What is the cheapest month to book a flight from Europe to Ontario?

Currently, August is the cheapest month in which you can book a flight from Europe to Ontario (average of $246). Flying from Europe to Ontario in March is currently the most expensive (average of $328). 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 EU to ONT?

Find hourly flight availability from Europe to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

When flying from Europe to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 3, 2025.
See what other customers who have flown with Delta, Alaska Airlines, and KLM from Europe to Ontario 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
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
809 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,306 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Europe to Ontario. 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 into for flights to Ontario from Europe?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ontario from Europe.

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

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at $592. JetBlue flights start at $623 while deals on Iberia start at $624 one-way.

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

    Most travelers choose Paris Charles de Gaulle - Ontario, Frankfurt am Main - Ontario or Warsaw Frederic Chopin - Ontario when deciding on the best route from Europe to Ontario.

  • Can I find deals for flights from Europe to Ontario that include hotel bookings?

    Yes. In addition to deals on Europe to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Europe to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Europe to Ontario.

  • Can I find deals for business class flights from Europe to Ontario?

    Yes. Cheapflights offers flight deals from Europe to Ontario 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 Europe to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Europe to Ontario (average of $246). Flying from Europe to Ontario in March is currently the most expensive (average of $328). 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 Europe to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Europe to Ontario

Discover the top 2 airlines that operate flights from Europe to Ontario. 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$560Average$1,040FlexibilityNo cancel feeOn-time69%
KLMCheapest$744Average$879FlexibilityNo cancel feeOn-time75%

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