SDF - DLH

$298 Find Cheap Flights from Louisville to Duluth - Compare and Save

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Louisville to Duluth departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$298
Delta
Sun 8/9Sat 8/15
SDF - DLH • 1 stop
Top airlines
Delta
Cheapest • from $298 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Louisville and Duluth. You'll need at least 1 connection.
Insights
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Top layover airports
Chicago (ORD)
Cheapest • Avg $485 (round-trip)
Chicago (ORD)
Shortest trip • 4h 53m (one-way)
Insights
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Booking Insights
Flight Deals

Cheap Flights from Louisville to Duluth (SDF-DLH)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Louisville to Duluth that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Louisville to Duluth

Sun, Aug 9 - Sat, Aug 15
Delta Logo
7:54 pm - 10:41 pm
SDF
-
DLH
3h 47m
1 stop
Delta Logo
5:15 am - 11:55 am
DLH
-
SDF
5h 40m
1 stop
$298Delta
Mon, Sep 7 - Tue, Sep 15
Delta Logo
4:30 pm - 10:41 pm
SDF
-
DLH
7h 11m
1 stop
Delta Logo
11:43 am - 7:14 pm
DLH
-
SDF
6h 31m
1 stop
$312Delta
Thu, Sep 17 - Sat, Sep 19
United Airlines Logo
5:15 am - 10:42 am
SDF
-
DLH
6h 27m
1 stop
United Airlines Logo
3:10 pm - 11:07 pm
DLH
-
SDF
6h 57m
1 stop
$329United Airlines
Mon, Sep 7 - Sat, Sep 12
Delta Logo
4:30 pm - 7:44 pm
SDF
-
DLH
4h 14m
1 stop
Delta Logo
5:15 am - 11:54 am
DLH
-
SDF
5h 39m
1 stop
$359Delta
Sat, Dec 5 - Wed, Dec 9
United Airlines Logo
6:00 pm - 11:04 pm
SDF
-
DLH
6h 04m
1 stop
United Airlines Logo
6:10 pm - 11:55 pm
DLH
-
SDF
4h 45m
1 stop
$378United Airlines
Tue, Aug 11 - Sat, Aug 15
United Airlines Logo
7:10 am - 10:42 am
SDF
-
DLH
4h 32m
1 stop
United Airlines Logo
6:23 pm - 11:59 pm
DLH
-
SDF
4h 36m
1 stop
$401United Airlines
Sat, Sep 12 - Tue, Sep 15
Delta Logo
8:35 am - 10:35 pm
SDF
-
DLH
15h 00m
2 stops
Delta Logo
11:43 am - 7:14 pm
DLH
-
SDF
6h 31m
1 stop
$420Delta
Fri, Sep 11 - Tue, Sep 15
United Airlines Logo
11:00 am - 2:29 pm
SDF
-
DLH
4h 29m
1 stop
United Airlines Logo
6:27 pm - 11:56 pm
DLH
-
SDF
4h 29m
1 stop
$423United Airlines
Fri, Jul 31 - Tue, Aug 4
United Airlines Logo
7:55 pm - 11:23 pm
SDF
-
DLH
4h 28m
1 stop
United Airlines Logo
6:25 pm - 11:59 pm
DLH
-
SDF
4h 34m
1 stop
$428United Airlines
Thu, Sep 10 - Mon, Sep 14
Delta Logo
12:34 pm - 3:29 pm
SDF
-
DLH
3h 55m
1 stop
Delta Logo
11:43 am - 11:43 pm
DLH
-
SDF
11h 00m
1 stop
$444Delta
Booking Insights

KAYAK's insights & trends for Louisville to Duluth flights

Get data-powered insights and trends into flights from Louisville to Duluth to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Louisville to Duluth?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Louisville to Duluth were found on Delta ($298) and United Airlines ($329).

Find deals

Good to know

Cheapest flight

$298
Flight from Louisville to Duluth

When to book flights from Louisville to Duluth

Are your dates flexible? Find out the best times to travel from Louisville to Duluth based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Louisville to Duluth

  • What is the cheapest flight from Louisville to Duluth?

    In the last 5 days, the lowest price for a flight from Louisville to Duluth was $298 for a round-trip ticket.

  • Do I need a passport to fly between Louisville and Duluth?

    No, a passport isn't needed to fly from Louisville to Duluth. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Louisville to Duluth?

    Louisville airport is called Louisville Intl and the only airport in Duluth is Duluth Intl.

  • Which aircraft models fly most regularly from Louisville to Duluth?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Louisville to Duluth?

    Star Alliance is the only airline alliance operating flights between Louisville and Duluth.

  • How does KAYAK find such low prices on flights from Louisville to Duluth?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Louisville to Duluth.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Louisville to Duluth?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Duluth from Louisville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Louisville to Duluth?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Duluth with an airline and back to Louisville with another airline. Booking your flights between Louisville and DLH can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Louisville to Duluth?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Duluth from Louisville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Louisville to Duluth

 
See real verified KAYAK customer reviews for airlines flying from Louisville to Duluth. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Louisville to Duluth? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10006 reviews
7.7Boarding
8.1Crew
7.3Comfort
7.1Entertainment
6.6Food
Airline reviews

I was fully checked in the prior night and i was unchecked and then didn’t have a seat when I boarded. Instead of an aisle seat, I was out in the middle seat of the very last row of the plane.

2.0 MediocreJames, Jan 2026
ORD - MSP
Read more United Airlines reviews

I was fully checked in the prior night and i was unchecked and then didn’t have a seat when I boarded. Instead of an aisle seat, I was out in the middle seat of the very last row of the plane.

Having a long layover, I was very appreciative of the ability to stand by for an earlier flight. Other airlines like Delta have refused this to me in the past, just to be mean (because my ticket class wasn't high enough). United went out of their way to help me get to my destination early, which I really appreciated given that it was the third leg of a 24+ hour journey for me.

Survey sent before we actually left. Delay after delay. Now a crew problem.

Not really their fault, but a 4.5 hour delay is pretty brutal

we were delayed going into and out of Newark Airport by 3-4 hours each way. Excuses/reasons given were misleading. Weather was cited at first when there was NO weather issue. Turns out Newark had a shortage of staff and runway construction. United knew this and should have NOT scheduled flights when they know we would be delayed so long. I will avoid United and EWR airport at all cost going forward. Delta never looked so good.

Late out of the gate, late to takeoff. No screens on plane. Uncomfortable window seat.

Crew did their best but the plane configuration is too tight if you're bigger than an average sardine. Controls for the entertainment system didn't all work. The aircraft hadn't been cleaned in awhile.

The male air hostess was rude and didn’t provide good customer service. Didn’t even offer me a drink

Going through customs and having a connecting flight is impossible in Chicago.

The only problem I had with this being my first flight was primarily on me having a large luggage and with the flight delay, having our layover be cut short. I had to go straight to the gate and may have almost missed it. Thankfully the digital boarding pass was easily accessible to be able to board.

Everything you need to know for your flight from Louisville to Duluth

Information on your arrival and departure airports

Louisville (SDF)
Duluth (DLH)