HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$625+ 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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
CGN — ONT
Feb 23 — Mar 21
Mon 2/23
Mon 3/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Cologne to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 January 24, 2026.

This British Airways deal was found by Cheapflights users on 1/21. 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 2/274:35 pm
CGN
-
ONT
2 stops39h 14m
British Airways
Mon 3/211:58 pm
ONT
-
CGN
2 stops31h 32m
British Airways
Deal found 1/21$625
This British Airways deal was found by Cheapflights users on 1/23. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/84:35 pm
CGN
-
ONT
2 stops34h 07m
British Airways
Sun 3/222:39 pm
ONT
-
CGN
2 stops17h 51m
British Airways
Deal found 1/23$890
This oojo deal was found by Cheapflights users on 1/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/75:10 pm
CGN
-
ONT
2 stops38h 03m
British Airways
Sun 2/2211:58 pm
ONT
-
CGN
2 stops31h 12m
British Airways
Deal found 1/24$1,187
This Turkish Airlines deal was found by Cheapflights users on 1/22. 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.
Thu 9/37:10 pm
CGN
-
ONT
2 stops35h 59m
Turkish Airlines
Sun 9/1310:56 pm
ONT
-
CGN
2 stops29h 54m
Turkish Airlines
Deal found 1/22$1,399
This Turkish Airlines deal was found by Cheapflights users on 1/23. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/102:50 pm
CGN
-
ONT
2 stops64h 19m
Turkish Airlines
Sun 8/3011:25 pm
ONT
-
CGN
2 stops49h 00m
Turkish Airlines
Deal found 1/23$1,400
This Turkish Airlines deal was found by Cheapflights users on 1/23. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:10 pm
CGN
-
ONT
2 stops35h 59m
Turkish Airlines
Sun 8/3011:25 pm
ONT
-
CGN
2 stops49h 00m
Turkish Airlines
Deal found 1/23$1,554
This Turkish Airlines deal was found by Cheapflights users on 1/23. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/62:50 pm
CGN
-
ONT
2 stops40h 19m
Turkish Airlines
Sat 8/2911:25 pm
ONT
-
CGN
2 stops25h 00m
Turkish Airlines
Deal found 1/23$1,710
This lastminute.com deal was found by Cheapflights users on 1/23. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:05 pm
CGN
-
ONT
2 stops33h 37m
British Airways
Sat 3/142:39 pm
ONT
-
CGN
2 stops17h 01m
British Airways
Deal found 1/23$1,912
This Expedia deal was found by Cheapflights users on 1/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/134:35 pm
CGN
-
ONT
2 stops34h 07m
British Airways
Fri 3/202:39 pm
ONT
-
CGN
2 stops17h 41m
British Airways
Deal found 1/23$2,038

Find 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 January 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$625
(British Airways)

Popular in

July

Cheapest in

February

Average price

$612
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. 14% potential increase in price ($120 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 24, 2026.
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 2/27

4:35 pm-10:49 pm

2 stops39h 14m

Ontario

Mon 3/2

11:58 pm-4:30 pm

2 stops31h 32m

$625

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Sun 3/8

4:35 pm-6:42 pm

2 stops34h 07m

Ontario

Sun 3/22

2:39 pm-4:30 pm

2 stops17h 51m

$890

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Tue 3/10

5:05 pm-6:42 pm

2 stops33h 37m

Ontario

Sat 3/14

2:39 pm-3:40 pm

2 stops17h 01m

$1,912

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Mon 2/23

5:15 pm-6:42 pm

2 stops34h 27m

Ontario

Sat 2/28

2:39 pm-3:40 pm

2 stops16h 01m

$2,338

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 3/13

4:35 pm-6:42 pm

2 stops34h 07m

Ontario

Sat 3/21

2:39 pm-3:40 pm

2 stops17h 01m

$2,779

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Wed 6/17

7:10 pm-10:09 pm

2 stops35h 59m

Ontario

Sun 6/21

11:25 pm-6:10 pm

2 stops33h 45m

$5,773

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Wed 5/13

7:10 pm-10:09 pm

2 stops59h 59m

$1,254

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Thu 5/14

7:10 pm-10:09 pm

2 stops35h 59m

$1,254

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Fri 5/8

1:00 pm-12:22 pm

2 stops32h 22m

$1,670

CologneOntario

CGN - ONT

CGNONT

Cologne Köln/Bonn

Tue 5/5

1:00 pm-5:52 pm

2 stops37h 52m

$1,670

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

Showing 1-10 of 14 results
1
2

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, February is the cheapest month in which you can book a flight from Cologne to Ontario (average of $444). Flying from Cologne to Ontario in July is currently the most expensive (average of $669). 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 $625, British Airways can have you in Ontario from Cologne in 39h 14m. Airlines will cover a distance of 5672 mi.

  • 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, February is the cheapest month in which you can book a flight from Cologne to Ontario (average of $444). Flying from Cologne to Ontario in July is currently the most expensive (average of $669). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Cologne to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Frankfurt to Los Angeles flights
Frankfurt to San Francisco flights
Frankfurt to Las Vegas flights
Frankfurt to Ontario flights
Frankfurt to Santa Ana flights
Frankfurt to Long Beach flights
Duesseldorf Intl to Los Angeles flights
Munich to Los Angeles flights
Frankfurt-Hahn to Los Angeles flights
Munich to San Francisco flights
Berlin to Los Angeles flights
Duesseldorf Intl to Santa Ana flights
Frankfurt to San Jose flights
Berlin to San Francisco flights
Duesseldorf Intl to Las Vegas flights
Munich to Las Vegas flights
Duesseldorf Intl to San Francisco flights
Frankfurt-Hahn to Las Vegas flights
Berlin to Las Vegas flights
Frankfurt to Oakland flights
Munich to San Diego flights
Weeze to Los Angeles flights
Hamburg to Los Angeles flights
Stuttgart to Los Angeles flights
Berlin to Oakland flights
Munich to Ontario flights
Frankfurt to San Diego flights
Frankfurt-Hahn to San Francisco flights
Stuttgart to Ontario flights
Berlin to San Jose flights
Munich to Santa Ana flights
Hamburg to Las Vegas flights
Stuttgart to Santa Ana flights
Duesseldorf Intl to Ontario flights
Munich to Long Beach flights
Bremen to Los Angeles flights
Hamburg to San Francisco flights
Munich to Burbank flights
Cologne to Los Angeles flights
Stuttgart to San Francisco flights
Cologne to San Francisco flights
Munich to San Jose flights
Stuttgart to Las Vegas flights
Munich to Oakland flights
Duesseldorf Intl to San Diego flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.