$643+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
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
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 June 12, 2025.
Round-trip from | $643 (United Airlines) |
|---|---|
Popular in | December |
Cheapest in | March |
Average price | $742 |
Find flight deals from Cologne to Ontario
Cheapest flights from Cologne to OntarioExplore 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 June 12, 2025.
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 June 12, 2025.
This United Airlines deal was found by Cheapflights users on 6/10. 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.
This British Airways deal was found by Cheapflights users on 6/11. 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.
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 June 12, 2025.
Use the filters below to find and compare flights from Cologne to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
CologneOntario
CGN - ONT
CGNONT
Cologne Köln/Bonn
Thu 9/25
6:05 am-8:24 pm
2 stops23h 19m
Ontario
Tue 10/7
9:36 am-12:15 pm
2 stops17h 39m
CologneOntario
CGN - ONT
CGNONT
Cologne Köln/Bonn
Sat 10/4
10:20 am-10:35 pm
2 stops21h 15m
Ontario
Fri 10/10
11:59 pm-8:50 pm
2 stops35h 51m
CologneOntario
CGN - ONT
CGNONT
Cologne Köln/Bonn
Sat 7/5
10:20 am-11:54 pm
2 stops22h 34m
CologneOntario
CGN - ONT
CGNONT
Cologne Köln/Bonn
Fri 7/4
6:05 am-6:30 pm
2 stops21h 25m
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.
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 $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.
Rainfall in Ontario by month
Plan your trip to Ontario by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.
Temperature in Ontario by month
Plan your trip to Ontario by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).
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 June 12, 2025.
To help decide which airline to fly from Cologne to Ontario, see what other customers have to say about United Airlines, American Airlines and British Airways. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Thomas,Apr 2025
TPE - SFO
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Thomas,Apr 2025
TPE - SFO
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Thomas,Apr 2025
TPE - SFO
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Thomas,Apr 2025
TPE - SFO