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$604+ Cheap flights from Cologne (CGN) 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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
CGN — ONT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Cologne to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Cologne (CGN) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 16, 2025.

Round-trip from

$604
(British Airways)

Popular in

July

Cheapest in

February

Average price

$601
From Cologne Köln/Bonn to Ontario
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Highest demand for flights based on searches. 13% potential increase in price ($109 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Cologne to Ontario

Cheapest flights from Cologne to Ontario
Explore the most affordable flight options available from Cologne to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This British Airways deal was found by Cheapflights users on 9/14. 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.
Fri 11/144:35 pmCGN - ONT
2 stops34h 46mBritish Airways
Tue 11/187:00 amONT - CGN
2 stops24h 30mBritish Airways
Deal found 9/14$604
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/16:05 amCGN - ONT
2 stops25h 47mUnited Airlines
Mon 10/209:36 amONT - CGN
2 stops17h 39mUnited Airlines
Deal found 9/16$606
This British Airways deal was found by Cheapflights users on 9/14. 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 10/610:50 amCGN - ONT
2 stops22h 09mBritish Airways
Wed 10/292:51 pmONT - CGN
2 stops17h 19mBritish Airways
Deal found 9/14$628
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/86:20 amCGN - ONT
2 stops25h 32mUnited Airlines
Thu 10/301:29 pmONT - CGN
2 stops18h 51mUnited Airlines
Deal found 9/14$762
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 11/148:40 amCGN - ONT
3 stops47h 11mUnited Airlines
Tue 11/185:05 amONT - CGN
2 stops27h 05mUnited Airlines
Deal found 9/15$785
This oojo deal was found by Cheapflights users on 9/15. 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.
Thu 10/2310:15 amCGN - ONT
2 stops21h 03mBritish Airways
Thu 11/62:59 pmONT - CGN
2 stops15h 41mBritish Airways
Deal found 9/15$905
This oojo deal was found by Cheapflights users on 9/15. 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.
Thu 9/259:55 pmCGN - ONT
2 stops29h 21mBritish Airways
Wed 10/812:47 pmONT - CGN
2 stops23h 13mBritish Airways
Deal found 9/15$964
This oojo deal was found by Cheapflights users on 9/14. 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.
Mon 9/229:15 pmCGN - ONT
2 stops34h 18mBritish Airways
Sun 10/511:59 pmONT - CGN
2 stops29h 21mBritish Airways
Deal found 9/14$971
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 10/97:40 amCGN - ONT
2 stops18h 43mUnited Airlines
Sun 10/129:36 amONT - CGN
2 stops16h 34mUnited Airlines
Deal found 9/14$1,135
This lastminute.com deal was found by Cheapflights users on 9/15. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2210:50 amCGN - ONT
2 stops19h 58mBritish Airways
Sun 9/284:45 pmONT - CGN
2 stops18h 40mBritish Airways
Deal found 9/15$1,188

Cheapflights Fare Finder

 
Customize your flight search to find flights from Cologne 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 September 16, 2025.
Use the filters below to find and compare flights from Cologne to Ontario that are best for you.

Fly from

Cologne

Fly to

Ontario

Route

Depart

Return

Price

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 11/14

4:35 pm-6:21 pm

2 stops34h 46m

Ontario

Tue 11/18

12:46 pm-4:30 pm

2 stops18h 44m

$604

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Wed 10/1

6:05 am-10:52 pm

2 stops25h 47m

Ontario

Mon 10/20

9:36 am-12:15 pm

2 stops17h 39m

$606

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Tue 9/30

12:55 pm-10:52 pm

2 stops18h 57m

Ontario

Mon 10/20

9:36 am-12:15 pm

2 stops17h 39m

$606

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Thu 10/2

8:35 am-5:23 pm

2 stops17h 48m

Ontario

Mon 10/20

9:36 am-12:15 pm

2 stops17h 39m

$606

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 10/3

6:05 am-8:24 pm

2 stops23h 19m

Ontario

Mon 10/20

9:36 am-12:15 pm

2 stops17h 39m

$606

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 10/3

6:05 am-8:24 pm

2 stops23h 19m

Ontario

Sun 10/19

9:36 am-12:15 pm

2 stops17h 39m

$606

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Thu 10/2

8:35 am-5:23 pm

2 stops17h 48m

Ontario

Sun 10/19

9:36 am-12:15 pm

2 stops17h 39m

$606

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Sun 11/30

11:20 am-9:59 pm

2 stops19h 39m

$1,014

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Mon 9/22

10:50 am-9:48 pm

2 stops19h 58m

$1,424

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Thu 9/25

10:15 am-11:59 pm

2 stops22h 44m

$1,427

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 14 results
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Best time to book a flight from Cologne to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Cologne to Ontario (average of $246). Flying from Cologne to Ontario in March is currently the most expensive (average of $327). 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.

Related info for your journey

Find useful and relevant information for your journey from Cologne to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Cologne to Ontario?

    For as low as $606, British Airways can have you in Ontario from Cologne in 25h 47m. Airlines will cover a distance of 5672 mi. This flight may include one or multiple stops.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Cologne to Ontario (average of $246). Flying from Cologne to Ontario in March is currently the most expensive (average of $327). 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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