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$647+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
CGN — ONT
Dec 9 — Dec 161
Tue 12/9
Tue 12/16
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 November 9, 2025.

This lastminute.com deal was found by Cheapflights users on 11/9. 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 11/225:10 pmCGN - ONT
2 stops34h 22mBritish Airways
Sat 12/63:04 pmONT - CGN
2 stops15h 36mBritish Airways
Deal found 11/9$1,097
This American Airlines deal was found by Cheapflights users on 11/8. 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 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 stops30h 14mAmerican Airlines
Fri 12/2612:45 pmONT - CGN
2 stops18h 35mAmerican Airlines
Deal found 11/8$1,102
This oojo deal was found by Cheapflights users on 11/9. 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 12/2412:00 pmCGN - ONT
2 stops34h 52mBritish Airways
Sat 1/311:59 pmONT - CGN
2 stops31h 31mBritish Airways
Deal found 11/9$1,162
This oojo deal was found by Cheapflights users on 11/7. 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.
Sat 11/225:10 pmCGN - ONT
2 stops37h 49mBritish Airways
Tue 12/212:49 pmONT - CGN
2 stops18h 41mBritish Airways
Deal found 11/7$1,276
This United Airlines deal was found by Cheapflights users on 11/6. 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 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 stops41h 24mUnited Airlines
Tue 11/185:05 amONT - CGN
2 stops27h 05mUnited Airlines
Deal found 11/6$1,303
This American Airlines deal was found by Cheapflights users on 11/9. 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.
Sun 12/2811:20 amCGN - ONT
2 stops19h 54mAmerican Airlines
Fri 1/910:58 amONT - CGN
2 stops20h 22mAmerican Airlines
Deal found 11/9$1,436
This Turkish Airlines deal was found by Cheapflights users on 11/9. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:15 pmCGN - ONT
2 stops38h 14mMultiple Airlines
Fri 12/2610:44 amONT - CGN
2 stops38h 51mMultiple Airlines
Deal found 11/9$1,493
This Turkish Airlines deal was found by Cheapflights users on 11/7. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:15 pmCGN - ONT
2 stops38h 14mMultiple Airlines
Sun 12/2810:44 amONT - CGN
2 stops38h 51mMultiple Airlines
Deal found 11/7$1,518

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 November 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$647
(lastminute.com)

Popular in

July

Cheapest in

February

Average price

$637
Provider with most accurate pricing for Cologne Köln/Bonn-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Cologne Köln/Bonn-Los Angeles flights.
Search Deals
From Cologne Köln/Bonn to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($101 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 9, 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

Tue 1/27

5:05 pm-6:45 pm

2 stops34h 40m

Ontario

Thu 3/5

2:47 pm-3:40 pm

2 stops15h 53m

$647

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Thu 1/15

5:05 pm-5:22 pm

2 stops33h 17m

Ontario

Thu 1/29

3:09 pm-3:40 pm

2 stops15h 31m

$648

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Mon 5/4

1:00 pm-11:06 pm

2 stops19h 06m

Ontario

Sun 5/10

4:15 pm-5:20 pm

2 stops16h 05m

$939

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Thu 3/26

6:45 am-10:15 pm

2 stops23h 30m

Ontario

Sun 4/5

6:00 am-12:20 pm

2 stops21h 20m

$964

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Wed 12/24

12:00 pm-1:52 pm

2 stops34h 52m

Ontario

Sat 1/3

11:59 pm-4:30 pm

2 stops31h 31m

$1,162

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 5/1

1:35 pm-11:06 pm

2 stops18h 31m

Ontario

Sat 5/16

4:15 pm-5:05 pm

2 stops15h 50m

$1,221

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 5/1

1:35 pm-11:06 pm

2 stops18h 31m

Ontario

Fri 5/15

4:15 pm-5:40 pm

2 stops16h 25m

$1,223

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Sat 11/22

5:10 pm-9:59 pm

2 stops37h 49m

Ontario

Tue 12/2

12:49 pm-4:30 pm

2 stops18h 41m

$1,276

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Sun 12/28

11:20 am-10:14 pm

2 stops19h 54m

Ontario

Fri 1/9

10:58 am-4:20 pm

2 stops20h 22m

$1,436

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Sat 12/13

6:15 pm-11:29 pm

2 stops38h 14m

Ontario

Fri 12/26

10:44 am-10:35 am

2 stops38h 51m

$1,493

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 12 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 $497). Flying from Cologne to Ontario in July is currently the most expensive (average of $646). 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 $939, British Airways can have you in Ontario from Cologne in 19h 06m. 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, October is the cheapest month in which you can book a flight from Cologne to Ontario (average of $497). Flying from Cologne to Ontario in July is currently the most expensive (average of $646). 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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