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Duluth

$398+ Cheap flights from Ontario to Duluth (ONT - DLH)

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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DLH
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from Ontario to Duluth

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Duluth (DLH). 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 August 18, 2025.

Round-trip from

$398
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$373
From Ontario to Duluth Intl
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High demand for flights, 2% potential price rise
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Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Ontario to Duluth

Cheapest flights from Ontario to Duluth
Explore the most affordable flight options available from Ontario to Duluth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This United Airlines deal was found by Cheapflights users on 8/16. 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 9/167:00 amONT - DLH
1 stop9h 30mUnited Airlines
Wed 9/249:45 amDLH - ONT
2 stops9h 44mUnited Airlines
Deal found 8/16$398
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/167:00 amONT - DLH
1 stop9h 30mUnited Airlines
Tue 9/233:10 pmDLH - ONT
1 stop9h 20mUnited Airlines
Deal found 8/16$432
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/167:00 amONT - DLH
1 stop9h 30mUnited Airlines
Mon 9/223:10 pmDLH - ONT
1 stop9h 20mUnited Airlines
Deal found 8/16$523
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Wed 9/176:04 amONT - DLH
2 stops10h 26mUnited Airlines
Tue 9/233:10 pmDLH - ONT
1 stop9h 20mUnited Airlines
Deal found 8/16$557
This United Airlines deal was found by Cheapflights users on 8/15. 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.
Mon 9/296:36 pmONT - DLH
2 stops14h 09mUnited Airlines
Mon 10/611:20 amDLH - ONT
2 stops12h 04mUnited Airlines
Deal found 8/15$589
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Wed 9/176:04 amONT - DLH
2 stops10h 26mUnited Airlines
Mon 9/223:10 pmDLH - ONT
1 stop9h 20mUnited Airlines
Deal found 8/16$648
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Mon 9/17:00 amONT - DLH
1 stop9h 30mUnited Airlines
Fri 9/53:10 pmDLH - ONT
1 stop9h 20mUnited Airlines
Deal found 8/17$666

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Duluth 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 August 18, 2025.
Use the filters below to find and compare flights from Ontario to Duluth that are best for you.

Fly from

Ontario

Fly to

Duluth

Route

Depart

Return

Price

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Tue 9/16

7:00 am-6:30 pm

1 stop9h 30m

Duluth Intl

Wed 9/24

9:45 am-5:29 pm

2 stops9h 44m

$398

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Tue 9/16

7:00 am-6:30 pm

1 stop9h 30m

Duluth Intl

Tue 9/23

3:10 pm-10:30 pm

1 stop9h 20m

$432

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Tue 9/16

7:00 am-6:30 pm

1 stop9h 30m

Duluth Intl

Mon 9/22

3:10 pm-10:30 pm

1 stop9h 20m

$523

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Wed 9/17

6:04 am-6:30 pm

2 stops10h 26m

Duluth Intl

Tue 9/23

3:10 pm-10:30 pm

1 stop9h 20m

$557

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Mon 9/29

6:36 pm-10:45 am

2 stops14h 09m

Duluth Intl

Mon 10/6

11:20 am-9:24 pm

2 stops12h 04m

$589

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Wed 9/17

6:04 am-6:30 pm

2 stops10h 26m

Duluth Intl

Mon 9/22

3:10 pm-10:30 pm

1 stop9h 20m

$648

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Wed 8/20

7:00 am-6:30 pm

1 stop9h 30m

$414

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Best time to book a flight from Ontario to Duluth

Have a flexible travel schedule? Discover the best time to fly to Duluth from Ontario 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 Ontario to Duluth

What is the cheapest month to book a flight from Ontario to Duluth?

Currently, January is the cheapest month in which you can book a flight from Ontario to Duluth (average of $336). Flying from Ontario to Duluth in June is currently the most expensive (average of $476). 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 Ontario to Duluth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

  • How can I find direct flights from Ontario to Duluth?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Duluth 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 Ontario to Duluth?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Duluth (average of $336). Flying from Ontario to Duluth in June is currently the most expensive (average of $476). 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

Traveling to a place near Duluth?

Book flights to Duluth if you plan to visit one of these locations
Two Harbors
Superior

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