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$243+ Cheap flights from St. Louis to Duluth (STL - 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DLH
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap 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 January 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/24. 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.
Tue 2/34:49 pm
STL
-
DLH
1 stop5h 10m
United Airlines
Sat 2/73:05 pm
DLH
-
STL
1 stop6h 08m
United Airlines
Deal found 1/24$452
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Tue 5/199:00 am
STL
-
DLH
1 stop25h 29m
United Airlines
Fri 5/2211:26 am
DLH
-
STL
1 stop23h 01m
United Airlines
Deal found 1/27$471
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Tue 2/109:57 am
STL
-
DLH
1 stop4h 33m
United Airlines
Sat 2/143:19 pm
DLH
-
STL
1 stop5h 46m
United Airlines
Deal found 1/26$599
This Delta deal was found by Cheapflights users on 1/27. 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.
Tue 5/1910:45 am
STL
-
DLH
2 stops8h 41m
Delta
Fri 5/225:10 am
DLH
-
STL
1 stop3h 30m
Delta
Deal found 1/27$1,034

Find 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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$471
(United Airlines)

One-way from

$243
(United Airlines)

Popular in

June

Cheapest in

April

Average price

$313
Provider with most accurate pricing for Lambert-St Louis-Duluth Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Duluth Intl flights.
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From Lambert-St Louis to Duluth Intl
Search Deals
One-way flight from Lambert-St Louis to Duluth Intl
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 27, 2026.
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

Tue 2/3

4:49 pm-9:59 pm

1 stop5h 10m

Duluth Intl

Sat 2/7

3:05 pm-9:13 pm

1 stop6h 08m

$452

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Tue 2/10

9:57 am-2:30 pm

1 stop4h 33m

Duluth Intl

Sat 2/14

3:19 pm-9:05 pm

1 stop5h 46m

$599

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Wed 3/18

5:00 am-10:43 am

1 stop5h 43m

$243

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

Compare providers for flights from St. Louis to Duluth

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Duluth in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Duluth flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Duluth flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Duluth flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Duluth flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Duluth flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

How much does it cost to fly round-trip from St. Louis to Duluth?

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 January 27, 2026.
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
7.9
Good
8,119 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

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
7.9
Good
8,119 reviews
Delta
7.9
Good
8,119 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

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
9,205 reviews
Delta
7.9
Good
8,119 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

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?

    United Airlines can get you from St. Louis to Duluth in just under 5h 10m. Your travel time can differ by up to . The distance from St. Louis to Duluth is about 566 mi.

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

    United Airlines, at $215, 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 41% 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.

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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$215Average$492FlexibilityNo cancel feeOn-time69%
DeltaCheapest$238Average$358FlexibilityNo cancel feeOn-timeN/A

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