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$514+ Cheap flights from Cologne (CGN) to Ontario (ONT)

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
CGN — ONT
Nov 25 — Dec 21
Tue 11/25
Tue 12/2
1 adult, Economy
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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 October 26, 2025.

This British Airways deal was found by Cheapflights users on 10/24. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/85:10 pmCGN - ONT
2 stops34h 12mBritish Airways
Mon 11/243:19 pmONT - CGN
2 stops15h 51mBritish Airways
Deal found 10/24$989
This American Airlines deal was found by Cheapflights users on 10/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:40 pmCGN - ONT
2 stops18h 48mAmerican Airlines
Fri 12/2612:45 pmONT - CGN
2 stops18h 35mAmerican Airlines
Deal found 10/25$1,203
This British Airways deal was found by Cheapflights users on 10/24. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/94:35 pmCGN - ONT
2 stops38h 54mBritish Airways
Thu 11/1311:59 pmONT - CGN
2 stops31h 21mBritish Airways
Deal found 10/24$1,254
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Fri 11/149:10 amCGN - ONT
2 stops20h 34mUnited Airlines
Tue 11/187:00 amONT - CGN
2 stops25h 10mUnited Airlines
Deal found 10/23$1,314
This Flysmarter deal was found by Cheapflights users on 10/24. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/99:10 amCGN - ONT
3 stops22h 41mAir Canada
Thu 11/136:00 amONT - CGN
3 stops25h 20mAir Canada
Deal found 10/24$1,319
This lastminute.com deal was found by Cheapflights users on 10/25. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2811:20 amCGN - ONT
2 stops20h 03mBritish Airways
Fri 12/53:04 pmONT - CGN
2 stops16h 16mBritish Airways
Deal found 10/25$1,434
This lastminute.com deal was found by Cheapflights users on 10/25. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:40 pmCGN - ONT
2 stops18h 48mBritish Airways
Sun 12/282:42 pmONT - CGN
2 stops16h 48mBritish Airways
Deal found 10/25$1,479

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 October 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$648
(American Airlines)

One-way from

$514
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$719
Provider with most accurate pricing for Cologne Köln/Bonn-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Cologne Köln/Bonn-Los Angeles flights.
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From Cologne Köln/Bonn to Ontario
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One-way flight from Cologne Köln/Bonn to Ontario
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Highest demand for flights based on searches. 12% potential increase in price ($99 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 26, 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

Thu 4/23

10:15 am-9:36 pm

2 stops20h 21m

Ontario

Sat 5/23

5:00 pm-8:50 pm

2 stops18h 50m

$648

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Wed 1/21

5:15 pm-5:22 pm

2 stops33h 07m

Ontario

Wed 1/28

3:09 pm-4:10 pm

2 stops16h 01m

$650

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Wed 4/22

10:15 pm-5:45 pm

2 stops28h 30m

Ontario

Tue 5/26

1:33 pm-9:25 pm

2 stops22h 52m

$651

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 4/24

10:00 pm-5:46 pm

2 stops28h 46m

Ontario

Tue 5/26

5:00 pm-9:25 pm

2 stops19h 25m

$651

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Wed 4/22

10:15 pm-5:46 pm

2 stops28h 31m

Ontario

Wed 5/27

2:57 pm-9:00 pm

2 stops21h 03m

$651

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Wed 4/22

10:15 pm-5:45 pm

2 stops28h 30m

Ontario

Sat 5/23

5:00 pm-8:50 pm

2 stops18h 50m

$651

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Wed 4/22

10:15 pm-5:46 pm

2 stops28h 31m

Ontario

Sun 5/24

5:00 pm-8:25 pm

2 stops18h 25m

$651

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 4/24

10:00 pm-5:46 pm

2 stops28h 46m

Ontario

Wed 5/27

5:00 pm-9:00 pm

2 stops19h 00m

$651

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 4/24

10:00 pm-5:46 pm

2 stops28h 46m

Ontario

Sat 5/23

5:00 pm-8:50 pm

2 stops18h 50m

$651

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 4/24

10:00 pm-5:46 pm

2 stops28h 46m

Ontario

Sun 5/24

1:33 pm-8:25 pm

2 stops21h 52m

$651

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 20 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, October is the cheapest month in which you can book a flight from Cologne to Ontario (average of $502). Flying from Cologne to Ontario in July is currently the most expensive (average of $641). 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 $648, American Airlines can have you in Ontario from Cologne in 20h 21m. Airlines will cover a distance of 5672 mi. This flight may include one or multiple stops.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $514. However, be on the lookout for offers from British Airways and United Airlines, as they are both options that can get you from Cologne to Ontario for a low price.

  • 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, October is the cheapest month in which you can book a flight from Cologne to Ontario (average of $502). Flying from Cologne to Ontario in July is currently the most expensive (average of $641). 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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