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Duluth

$415+ Cheap flights from Ontario to Duluth (ONT - DLH)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DLH
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 July 2, 2025.

Round-trip from

$439
(United Airlines)

One-way from

$415
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$428
From Ontario to Duluth Intl
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One-way flight from Ontario to Duluth Intl
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High demand for flights, 0% 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 July 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 July 2, 2025.

This United Airlines deal was found by Cheapflights users on 7/1. 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.
Mon 9/156:50 pmONT - DLH
2 stops13h 55mUnited Airlines
Mon 9/223:10 pmDLH - ONT
1 stop9h 20mUnited Airlines
Deal found 7/1$439
This Delta deal was found by Cheapflights users on 7/1. 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.
Fri 7/111:15 pmONT - DLH
2 stops7h 29mDelta
Tue 7/2211:03 amDLH - ONT
2 stops7h 26mDelta
Deal found 7/1$453

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 July 2, 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

Mon 9/15

6:50 pm-10:45 am

2 stops13h 55m

Duluth Intl

Mon 9/22

3:10 pm-10:30 pm

1 stop9h 20m

$439

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Sat 7/26

1:15 pm-10:44 pm

2 stops7h 29m

Duluth Intl

Fri 8/1

6:03 pm-11:42 pm

2 stops7h 39m

$627

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Wed 7/23

5:05 am-5:33 pm

2 stops10h 28m

$415

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

Tue 7/8

1:15 pm-10:44 pm

2 stops7h 29m

$420

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 $335). Flying from Ontario to Duluth in June is currently the most expensive (average of $475). 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.

Reviews of airlines servicing Duluth

Get insights into the airlines that provide service to Duluth. 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 Duluth. Reviews last updated July 2, 2025.
Read reviews from past customers who have flown Delta and United Airlines from Ontario to Duluth. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,983 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
8.0
Very good
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
United Airlines
7.4
Good
8,861 reviews
Delta
8.0
Very good
7,983 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

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 $335). Flying from Ontario to Duluth in June is currently the most expensive (average of $475). 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 Ontario?

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

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