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$528+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
DUS — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$528
(AirNGo)

Popular in

July

Cheapest in

March

Average price

$711
From Duesseldorf Intl to Ontario
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Highest demand for flights based on searches. 12% potential increase in price ($104 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 June 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 June 12, 2025.

This AirNGo deal was found by Cheapflights users on 6/12. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2910:35 amDUS - ONT
2 stops17h 42mUnited Airlines
Tue 11/41:00 pmONT - DUS
2 stops15h 35mUnited Airlines
Deal found 6/12$528
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/196:20 amDUS - ONT
2 stops19h 08mDelta
Wed 7/25:08 pmONT - DUS
2 stops15h 32mDelta
Deal found 6/11$569
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.
Wed 6/1810:50 amDUS - ONT
2 stops22h 09mBritish Airways
Sun 6/294:50 pmONT - DUS
2 stops19h 15mBritish Airways
Deal found 6/11$593
This Expedia deal was found by Cheapflights users on 6/12. 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.
Thu 8/2811:55 amDUS - ONT
2 stops21h 13mMultiple Airlines
Sat 8/3012:47 pmONT - DUS
2 stops39h 38mMultiple Airlines
Deal found 6/12$597
This Flysmarter 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:00 amDUS - ONT
2 stops24h 25mLufthansa
Sat 10/47:02 amONT - DUS
2 stops17h 38mLufthansa
Deal found 6/10$617
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:20 amDUS - ONT
2 stops21h 40mIberia
Thu 10/98:44 amONT - DUS
2 stops21h 16mIberia
Deal found 6/10$622
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/236:20 amDUS - ONT
2 stops25h 28mAmerican Airlines
Fri 9/52:54 pmONT - DUS
2 stops19h 16mAmerican Airlines
Deal found 6/11$723
This KLM deal was found by Cheapflights users on 6/12. 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.
Fri 7/1812:25 pmDUS - ONT
2 stops19h 22mKLM
Sat 8/26:25 amONT - DUS
2 stops20h 25mKLM
Deal found 6/12$808
This Flysmarter deal was found by Cheapflights users on 6/12. 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.
Sat 7/197:30 amDUS - ONT
2 stops18h 55mAir Canada
Sat 8/25:05 amONT - DUS
3 stops20h 20mAir Canada
Deal found 6/12$1,061

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 June 12, 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

Wed 10/29

10:35 am-8:17 pm

2 stops17h 42m

Ontario

Tue 11/4

1:00 pm-1:35 pm

2 stops15h 35m

$528

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Sun 8/24

2:30 pm-11:40 pm

2 stops18h 10m

Ontario

Sat 9/6

1:15 pm-5:40 pm

2 stops19h 25m

$571

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Fri 8/22

10:30 am-5:52 pm

2 stops40h 22m

Ontario

Sat 9/6

2:54 pm-1:25 pm

2 stops37h 31m

$593

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Thu 8/28

11:55 am-12:08 am

2 stops21h 13m

Ontario

Sat 8/30

12:47 pm-1:25 pm

2 stops39h 38m

$597

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Fri 9/19

6:00 am-9:25 pm

2 stops24h 25m

Ontario

Sat 10/4

7:02 am-9:40 am

2 stops17h 38m

$617

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Fri 9/26

6:20 am-7:00 pm

2 stops21h 40m

Ontario

Thu 10/9

8:44 am-3:00 pm

2 stops21h 16m

$622

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Sat 8/23

6:20 am-10:48 pm

2 stops25h 28m

Ontario

Fri 9/5

2:54 pm-7:10 pm

2 stops19h 16m

$723

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Fri 7/18

12:25 pm-10:47 pm

2 stops19h 22m

Ontario

Sat 8/2

6:25 am-11:50 am

2 stops20h 25m

$808

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Sat 7/19

7:30 am-5:25 pm

2 stops18h 55m

Ontario

Sat 8/2

5:05 am-10:25 am

3 stops20h 20m

$1,061

DüsseldorfOntario

DUS - ONT

DUSONT

Duesseldorf Intl

Thu 9/18

7:10 am-6:07 pm

2 stops19h 57m

$838

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 13 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, August is the cheapest month in which you can book a flight from Duesseldorf Intl Airport to Ontario (average of $246). Flying from Duesseldorf Intl Airport 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.
Read reviews from past customers who have flown Delta, KLM and United Airlines from Düsseldorf to Ontario. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.1
Good
9,537 reviews
Delta
8.0
Very good
7,946 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines flying from Duesseldorf Intl Airport to Ontario round-trip?

    Flying on United Airlines is currently your cheapest option to Ontario, with prices starting at $528. Additional round-trip tickets that might be worth considering are offered by Delta and British Airways, with the lowest prices starting at $571 and $593, respectively.

  • What are the cheapest airlines to fly from Duesseldorf Intl Airport to Ontario one-way?

    The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as $838. However, be on the lookout for offers from Iberia and United Airlines, as they are both options that can get you from Duesseldorf Intl Airport to Ontario for a low price.

  • 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, August is the cheapest month in which you can book a flight from Duesseldorf Intl Airport to Ontario (average of $246). Flying from Duesseldorf Intl Airport 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.

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