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$328+ Cheap flights from St. Louis to Duluth (STL - 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DLH
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from St. Louis to Duluth

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) 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

$263
(Delta)

Popular in

November

Cheapest in

April

Average price

$398
From Lambert-St Louis to Duluth Intl
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Highest demand for flights based on searches. 12% potential increase in price ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from St. Louis to Duluth

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

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.
Fri 9/126:00 amSTL - DLH
1 stop4h 07mDelta
Sun 9/145:10 amDLH - STL
1 stop3h 27mDelta
Deal found 9/9$328
This Delta deal was found by Cheapflights users on 9/11. 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 amSTL - DLH
1 stop4h 02mDelta
Tue 9/305:10 amDLH - STL
1 stop6h 20mDelta
Deal found 9/11$353
This Delta deal was found by Cheapflights users on 9/11. 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 9/266:00 amSTL - DLH
1 stop4h 07mDelta
Tue 9/305:10 amDLH - STL
1 stop6h 20mDelta
Deal found 9/11$378
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Sat 9/2712:25 pmSTL - DLH
1 stop6h 12mUnited Airlines
Tue 9/303:07 pmDLH - STL
2 stops21h 37mUnited Airlines
Deal found 9/11$494
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 10/99:20 amSTL - DLH
1 stop5h 12mUnited Airlines
Thu 10/169:45 amDLH - STL
1 stop25h 04mUnited Airlines
Deal found 9/11$550
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 9/2612:25 pmSTL - DLH
1 stop6h 12mUnited Airlines
Tue 9/3011:20 amDLH - STL
2 stops22h 32mUnited Airlines
Deal found 9/11$682
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/126:15 amSTL - DLH
2 stops28h 30mUnited Airlines
Sun 9/149:45 amDLH - STL
1 stop4h 34mUnited Airlines
Deal found 9/9$1,092

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis 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 St. Louis to Duluth that are best for you.

Fly from

St. Louis

Fly to

Duluth

Route

Depart

Return

Price

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 9/27

6:00 am-10:02 am

1 stop4h 02m

Duluth Intl

Tue 9/30

5:10 am-11:30 am

1 stop6h 20m

$353

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 9/26

6:00 am-10:07 am

1 stop4h 07m

Duluth Intl

Tue 9/30

5:10 am-11:30 am

1 stop6h 20m

$378

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 9/27

12:25 pm-6:37 pm

1 stop6h 12m

Duluth Intl

Tue 9/30

3:07 pm-12:44 pm

2 stops21h 37m

$494

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Thu 10/9

9:20 am-2:32 pm

1 stop5h 12m

Duluth Intl

Thu 10/16

9:45 am-10:49 am

1 stop25h 04m

$550

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 9/26

6:15 am-10:43 am

2 stops28h 28m

Duluth Intl

Tue 9/30

11:20 am-9:52 am

2 stops22h 32m

$788

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Best time to book a flight from St. Louis to Duluth

Have a flexible travel schedule? Discover the best time to fly to Duluth from St. Louis 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 St. Louis to Duluth

What is the cheapest month to book a flight from St. Louis to Duluth?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Duluth (average of $339). Flying from St. Louis 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.

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.
Peruse reviews from past customers who have flown with Delta and United Airlines from St. Louis to Duluth to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Mark,Jun 2024

SGF - ATL

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Mark,Jun 2024

SGF - ATL

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Mark,Jun 2024

SGF - ATL

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

Related info for your journey

Find useful and relevant information for your journey from St. Louis 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 St. Louis to Duluth?

    Delta and United Airlines can get you from St. Louis to Duluth in just under 4h 02m. Your travel time can differ by up to 2h 10m. The distance from St. Louis to Duluth is about 566 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from St. Louis to Duluth round-trip?

    United Airlines, at $238, was found to be the cheapest airline from St. Louis to Duluth. An alternate airline flying to your destination would be Delta. Users have found that United Airlines is 39% cheaper than the other options available to this destination.

  • Can I find deals for flights from St. Louis to Duluth that include hotel bookings?

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

  • How can I find direct flights from St. Louis to Duluth?

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

  • Can I find deals for business class flights from St. Louis to Duluth?

    Yes. Cheapflights offers flight deals from St. Louis 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 St. Louis to Duluth?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Duluth (average of $339). Flying from St. Louis 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 2 airlines flying from St. Louis to Duluth

Discover the top 2 airlines that operate flights from St. Louis 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$238Average$423FlexibilityNo cancel feeOn-time69%
DeltaCheapest$238Average$328FlexibilityNo cancel feeOn-timeN/A

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