What are the cheapest airlines flying from Louisville to Duluth round-trip?

Flying on United Airlines is currently your cheapest option to Duluth, with prices starting at $417. Another option worth looking into is Delta, starting at $463 round trip.

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 $336). Flying from Louisville 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.

What is the cheapest day to fly from Louisville to Duluth?

Travelers seeking maximum savings on their Louisville to Duluth flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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.

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).

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

Flying to your destination on a Friday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Duluth. Check prices with Cheapflights to find a great deal for your trip.

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.

$417+ Flights from Louisville to Duluth

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Cheap flight deals from Louisville to Duluth

Round-trip from	$417 (United Airlines)

From Louisville Intl to Duluth Intl

Search Deals

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 July 29, 2025.

Tue 9/167:20 amSDF - DLH

1 stop4h 25mUnited Airlines

Fri 9/199:45 amDLH - SDF

1 stop23h 15mUnited Airlines

Deal found 7/27

$417

Thu 8/286:00 amSDF - DLH

1 stop5h 15mDelta

Thu 9/410:55 amDLH - SDF

2 stops10h 47mDelta

Deal found 7/29

$463

Best flights from Louisville to Duluth
Discover carefully curated flight deals from Louisville to Duluth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Tue 9/167:20 amSDF - DLH

1 stop4h 25mUnited Airlines

Fri 9/199:45 amDLH - SDF

1 stop23h 15mUnited Airlines

Deal found 7/27

$417

Thu 8/286:00 amSDF - DLH

1 stop5h 15mDelta

Thu 9/410:55 amDLH - SDF

2 stops10h 47mDelta

Deal found 7/29

$463

Last-minute flights from Louisville to Duluth
Discover last-minute flight deals from Louisville to Duluth. Data last updated July 29, 2025 and is based on user searches.

Thu 8/286:00 amSDF - DLH

1 stop5h 15mDelta

Thu 9/410:55 amDLH - SDF

2 stops10h 47mDelta

Deal found 7/29

$463

Thu 8/287:00 amSDF - DLH

1 stop4h 45mUnited Airlines

Thu 9/43:10 pmDLH - SDF

1 stop6h 14mUnited Airlines

Deal found 7/29

$473

Fly from

Fly to

Route

Depart

Return

Price

LouisvilleDuluth

SDF - DLH

SDFDLH

Louisville Intl

Tue 9/16

7:20 am-10:45 am

1 stop4h 25m

Duluth Intl

Fri 9/19

9:45 am-10:00 am

1 stop23h 15m

$417

LouisvilleDuluth

SDF - DLH

SDFDLH

Louisville Intl

Thu 8/28

6:00 am-10:15 am

1 stop5h 15m

Duluth Intl

Thu 9/4

10:55 am-10:42 pm

2 stops10h 47m

$463

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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?

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 a feel of what it's like to fly with Delta and 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.

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,979 reviews

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,896 reviews

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Louisville to Duluth round-trip?
Flying on United Airlines is currently your cheapest option to Duluth, with prices starting at $417. Another option worth looking into is Delta, starting at $463 round trip.
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 $336). Flying from Louisville 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

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Top airline flying from Louisville to Duluth

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$243	Average$462	FlexibilityNo cancel fee	On-time69%

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$417+ Cheap flights from Louisville to Duluth (SDF - 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.

Find cheap flights from Louisville to Duluth with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Louisville to Duluth

Round-trip from

Find flight deals from Louisville to Duluth

Cheapest flights from Louisville to DuluthExplore 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 July 29, 2025.

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 July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Louisville to Duluth that are best for you.

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.

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 July 29, 2025.

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 29, 2025.

Get a feel of what it's like to fly with Delta and 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.

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.

What are the cheapest airlines flying from Louisville to Duluth round-trip?

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

How can I find direct flights from Louisville to Duluth?

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

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

Traveling to a place near Duluth?

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Alternative routes for Louisville to Duluth

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Top airline flying from Louisville to Duluth

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Book with Flexibility

Travel Smart

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 July 29, 2025.