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$645+ Cheap flights from Duesseldorf Intl (DUS) 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
DUS — ONT
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Cheap flight deals from Duesseldorf Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Duesseldorf Intl (DUS) 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 3, 2025.

Round-trip from

$645
(Delta)

Popular in

July

Cheapest in

September

Average price

$664
From Duesseldorf Intl to Ontario
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Highest demand for flights based on searches. 10% potential increase in price ($82 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Duesseldorf Intl to Ontario

Cheapest flights from Duesseldorf Intl to Ontario
Explore the most affordable flight options available from Duesseldorf Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2025.

This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/176:15 amDUS - ONT
2 stops19h 54mDelta
Tue 12/212:12 pmONT - DUS
2 stops16h 43mDelta
Deal found 11/3$645
This KLM deal was found by Cheapflights users on 10/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/178:15 amDUS - ONT
2 stops17h 54mKLM
Tue 12/27:05 amONT - DUS
2 stops15h 35mKLM
Deal found 10/31$667
This United Airlines deal was found by Cheapflights users on 11/1. 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.
Tue 12/166:20 amDUS - ONT
3 stops25h 29mUnited Airlines
Tue 12/235:05 amONT - DUS
2 stops43h 35mUnited Airlines
Deal found 11/1$749
This Delta deal was found by Cheapflights users on 11/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:30 amDUS - ONT
2 stops37h 42mDelta
Tue 12/306:00 amONT - DUS
2 stops26h 55mDelta
Deal found 11/1$810
This KLM deal was found by Cheapflights users on 11/3. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/108:15 amDUS - ONT
2 stops17h 54mKLM
Mon 11/247:05 amONT - DUS
2 stops15h 35mKLM
Deal found 11/3$851
This Delta deal was found by Cheapflights users on 11/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:30 amDUS - ONT
2 stops37h 42mDelta
Thu 1/16:00 amONT - DUS
2 stops22h 55mDelta
Deal found 11/1$895
This American Airlines deal was found by Cheapflights users on 11/3. 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 11/87:00 amDUS - ONT
2 stops23h 11mAmerican Airlines
Wed 11/1910:34 pmONT - DUS
2 stops38h 51mAmerican Airlines
Deal found 11/3$905
This KLM deal was found by Cheapflights users on 11/3. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:15 amDUS - ONT
2 stops17h 54mKLM
Thu 11/277:05 amONT - DUS
2 stops15h 35mKLM
Deal found 11/3$926

Cheapflights Fare Finder

 
Customize your flight search to find flights from Duesseldorf Intl 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 3, 2025.
Use the filters below to find and compare flights from Duesseldorf Intl Airport to Ontario that are best for you.

Fly from

Duesseldorf Intl

Fly to

Ontario

Route

Depart

Return

Price

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Mon 11/17

6:15 am-5:09 pm

2 stops19h 54m

Ontario

Tue 12/2

12:12 pm-1:55 pm

2 stops16h 43m

$645

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Thu 2/26

7:05 am-11:58 pm

2 stops25h 53m

Ontario

Mon 3/2

6:10 am-11:40 am

2 stops20h 30m

$660

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Thu 3/19

10:50 am-10:37 pm

2 stops19h 47m

Ontario

Wed 4/1

4:15 pm-5:40 pm

2 stops16h 25m

$665

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Tue 3/24

10:50 am-10:37 pm

2 stops19h 47m

Ontario

Wed 4/1

4:15 pm-5:40 pm

2 stops16h 25m

$665

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Wed 1/28

10:30 am-9:58 pm

2 stops20h 28m

Ontario

Wed 2/25

1:45 pm-1:35 pm

2 stops14h 50m

$668

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Sun 3/8

10:40 am-9:37 pm

2 stops19h 57m

Ontario

Mon 3/16

1:45 pm-1:45 pm

2 stops16h 00m

$668

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Sun 3/8

10:40 am-7:45 pm

2 stops18h 05m

Ontario

Tue 3/24

1:45 pm-1:35 pm

2 stops15h 50m

$669

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Mon 11/17

8:15 am-5:09 pm

2 stops17h 54m

Ontario

Tue 12/2

7:05 am-7:40 am

2 stops15h 35m

$721

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Fri 5/1

3:10 pm-11:06 pm

2 stops16h 56m

Ontario

Sun 5/10

5:00 am-2:15 pm

2 stops24h 15m

$726

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Thu 2/5

10:50 am-9:58 pm

2 stops20h 08m

Ontario

Thu 2/12

5:00 am-6:05 pm

2 stops28h 05m

$726

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 21 results
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Best time to book a flight from Duesseldorf Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Duesseldorf Intl 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 Duesseldorf Intl Airport to Ontario

What is the cheapest month to book a flight from Duesseldorf Intl Airport to Ontario?

Currently, September is the cheapest month in which you can book a flight from Duesseldorf Intl Airport to Ontario (average of $506). Flying from Duesseldorf Intl Airport to Ontario in July is currently the most expensive (average of $645). 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 Duesseldorf Intl to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Duesseldorf Intl?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from Duesseldorf Intl to Ontario. 0 airlines have flights to Ontario from Duesseldorf Intl on a regular basis. Booking flights from Duesseldorf Intl to Ontario should not be difficult; the airport handles an average of 0 inbound flights from Duesseldorf Intl per day.

  • How long is the flight from Duesseldorf Intl Airport to Ontario?

    There are many flights that can get you from Duesseldorf Intl Airport to Ontario in 19h 47m. Fly via Delta, American Airlines, or United Airlines to get the fastest option. There are 5641 mi between Duesseldorf Intl Airport and Ontario. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

  • How can I find direct flights from Duesseldorf Intl to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Duesseldorf Intl 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 Duesseldorf Intl Airport to Ontario?

    Currently, September is the cheapest month in which you can book a flight from Duesseldorf Intl Airport to Ontario (average of $506). Flying from Duesseldorf Intl Airport to Ontario in July is currently the most expensive (average of $645). 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.

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