HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Duluth

$464+ 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DLH
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Duluth 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 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 junio 12, 2025.

Round-trip from

$464
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$408
From Ontario to Duluth Intl
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

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 junio 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.
vie. 8/227:00 amONT - DLH
1 stop9h 30mUnited Airlines
sáb. 8/2311:20 amDLH - ONT
2 stops12h 05mUnited Airlines
Deal found 6/10$464
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/43:05 pmONT - DLH
2 stops17h 11mDelta
jue. 7/106:03 pmDLH - ONT
2 stops7h 39mDelta
Deal found 6/10$493

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 junio 12, 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

vie. 8/22

7:00 am-6:30 pm

1 stop9h 30m

Duluth Intl

sáb. 8/23

11:20 am-9:25 pm

2 stops12h 05m

$464

OntarioDuluth

ONT - DLH

ONTDLH

Ontario

vie. 7/4

3:05 pm-10:16 am

2 stops17h 11m

Duluth Intl

jue. 7/10

6:03 pm-11:42 pm

2 stops7h 39m

$493

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 $473). 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 Duluth by month

Plan your trip to Duluth by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Duluth ranges from 0.6 - 3.6 inches per month. August is typically the wettest month, when rainfall can reach 3.6 in. February is typically the driest time to visit Duluth when rainfall is around 0.6 in.

Temperature in Duluth by month

Plan your trip to Duluth by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Duluth, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 12.2 F).

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 junio 12, 2025.
Read through reviews of airlines operating flights from Ontario to Duluth, such as Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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 $473). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Duluth

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Minneapolis flights
San Francisco to Minneapolis flights
Ontario to Minneapolis flights
San Diego to Minneapolis flights
San Jose to Minneapolis flights
Santa Ana to Minneapolis flights
Sacramento to Minneapolis flights
Las Vegas to Minneapolis flights
Oakland to Minneapolis flights
Burbank to Minneapolis flights
Long Beach to Minneapolis flights
Palm Springs to Minneapolis flights
Fresno to Minneapolis flights
San Diego to Sioux Falls flights
Ontario to Sioux Falls flights
San Francisco to Rochester flights
Los Angeles to Fargo flights
Santa Ana to Sioux Falls flights
Santa Barbara to Minneapolis flights
Reno to Minneapolis flights
Las Vegas to Sioux Falls flights
San Francisco to Sioux Falls flights
Monterey to Minneapolis flights
Ontario to Fargo flights
Palm Springs to Sioux Falls flights
San Diego to Fargo flights
San Jose to Fargo flights
Medford to Minneapolis flights
San Francisco to Duluth flights
San Francisco to Fargo flights
San Luis Obispo to Minneapolis flights
Los Angeles to Duluth flights
Burbank to Sioux Falls flights
Sacramento to Sioux Falls flights
Los Angeles to Sioux Falls flights
Santa Rosa to Minneapolis flights
Sacramento to Fargo flights
Los Angeles to Rochester flights
Reno to Fargo flights
Santa Ana to Fargo flights
Las Vegas to Fargo flights
Arcata to Minneapolis flights
Los Angeles to Hibbing flights
Bakersfield to Minneapolis flights
Palm Springs to Fargo flights
San Jose to Sioux Falls flights
Burbank to Fargo flights
Fresno to Sioux Falls flights
San Diego to Rochester flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.