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$316+ Cheap flights from Louisville to Duluth (SDF - 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — DLH
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Louisville to Duluth

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) 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 September 11, 2025.

Round-trip from

$349
(United Airlines)

One-way from

$316
(Delta)
From Louisville Intl to Duluth Intl
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One-way flight from Louisville Intl to Duluth Intl
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Find flight deals from Louisville to Duluth

Cheapest flights from Louisville to Duluth
Explore the most affordable flight options available from Louisville to Duluth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sun 10/121:58 pmSDF - DLH
1 stop5h 39mUnited Airlines
Fri 10/179:45 amDLH - SDF
1 stop23h 14mUnited Airlines
Deal found 9/10$349
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 9/276:00 amSDF - DLH
1 stop5h 02mDelta
Sat 9/274:19 pmDLH - SDF
1 stop5h 39mDelta
Deal found 9/10$632
This Delta deal was found by Cheapflights users on 9/10. 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.
Sun 10/127:00 amSDF - DLH
1 stop5h 22mDelta
Fri 10/174:10 pmDLH - SDF
2 stops6h 51mDelta
Deal found 9/10$672
This Delta deal was found by Cheapflights users on 9/9. 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.
Sun 9/147:44 pmSDF - DLH
1 stop3h 59mDelta
Mon 9/154:20 pmDLH - SDF
1 stop5h 38mDelta
Deal found 9/9$888

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville 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 September 11, 2025.
Use the filters below to find and compare flights from Louisville to Duluth that are best for you.

Fly from

Louisville

Fly to

Duluth

Route

Depart

Return

Price

LouisvilleDuluth

SDF - DLH

SDFDLH

Louisville Intl

Sun 10/12

1:58 pm-6:37 pm

1 stop5h 39m

Duluth Intl

Fri 10/17

9:45 am-9:59 am

1 stop23h 14m

$349

LouisvilleDuluth

SDF - DLH

SDFDLH

Louisville Intl

Sat 9/27

6:00 am-10:02 am

1 stop5h 02m

Duluth Intl

Sat 9/27

4:19 pm-10:58 pm

1 stop5h 39m

$632

LouisvilleDuluth

SDF - DLH

SDFDLH

Louisville Intl

Sun 10/12

7:00 am-11:22 am

1 stop5h 22m

Duluth Intl

Fri 10/17

4:10 pm-12:01 am

2 stops6h 51m

$672

LouisvilleDuluth

SDF - DLH

SDFDLH

Louisville Intl

Sat 9/27

6:00 am-10:02 am

1 stop5h 02m

$316

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Louisville to Duluth

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

What is the cheapest time of day to fly from SDF to DLH?

Find hourly flight availability from Louisville to Duluth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Louisville to Duluth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 11, 2025.
Get a feel of what it's like to fly with United Airlines from Louisville to Duluth by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Louisville to Duluth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Louisville to Duluth?

    Departing from Louisville to Duluth will take you 5h 02m. There are 682 mi between Louisville and Duluth. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Louisville to Duluth round-trip?

    Flying on United Airlines is currently your cheapest option to Duluth, with prices starting at $243.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Louisville to Duluth (average of $339). Flying from Louisville to Duluth in June is currently the most expensive (average of $477). 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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Top airline flying from Louisville to Duluth

Discover the top airline that operate flights from Louisville to Duluth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$243Average$473FlexibilityNo cancel feeOn-time69%

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