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Cheap flights from St. Louis to Duluth from $257

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Duluth departing on 7/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from St. Louis to Duluth

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
5:36 pm - 10:50 pm
STL
-
DLH
5h 14m
1 stop
Delta Logo
5:00 am - 8:46 am
DLH
-
STL
3h 46m
1 stop
$257Delta
Wed, Jul 1 - Tue, Jul 7
Delta Logo
5:36 pm - 10:50 pm
STL
-
DLH
5h 14m
1 stop
Delta Logo
5:00 am - 8:46 am
DLH
-
STL
3h 46m
1 stop
$311Delta
Wed, Jul 1 - Wed, Jul 8
Delta Logo
5:36 pm - 10:50 pm
STL
-
DLH
5h 14m
1 stop
Delta Logo
5:00 am - 10:28 am
DLH
-
STL
5h 28m
1 stop
$322Delta
Sat, Jul 4 - Fri, Jul 10
Delta Logo
5:43 pm - 10:35 pm
STL
-
DLH
4h 52m
1 stop
Delta Logo
5:15 am - 10:26 am
DLH
-
STL
5h 11m
1 stop
$353Delta
Fri, Sep 25 - Mon, Sep 28
Delta Logo
5:36 pm - 10:50 pm
STL
-
DLH
5h 14m
1 stop
Delta Logo
5:00 am - 8:46 am
DLH
-
STL
3h 46m
1 stop
$387Delta
Wed, Jul 1 - Tue, Jul 7
United Airlines Logo
6:00 am - 10:43 am
STL
-
DLH
4h 43m
1 stop
United Airlines Logo
7:06 am - 12:11 pm
DLH
-
STL
5h 05m
1 stop
$479United Airlines
Tue, Jun 16 - Sat, Jun 20
Delta Logo
11:18 am - 3:23 pm
STL
-
DLH
4h 05m
1 stop
Delta Logo
5:00 am - 10:28 am
DLH
-
STL
5h 28m
1 stop
$548Delta
Fri, Jul 3 - Sun, Jul 5
United Airlines Logo
7:05 pm - 11:23 pm
STL
-
DLH
4h 18m
1 stop
United Airlines Logo
11:18 am - 3:46 pm
DLH
-
STL
4h 28m
1 stop
$562United Airlines
Sat, Jun 20 - Wed, Jun 24
United Airlines Logo
5:59 pm - 11:23 pm
STL
-
DLH
5h 24m
1 stop
United Airlines Logo
6:25 pm - 10:27 am
DLH
-
STL
16h 02m
2 stops
$572United Airlines
Sat, Jul 4 - Fri, Jul 10
United Airlines Logo
6:00 am - 10:43 am
STL
-
DLH
4h 43m
1 stop
United Airlines Logo
6:25 pm - 11:29 pm
DLH
-
STL
5h 04m
1 stop
$606United Airlines
Wed, Jun 24 - Fri, Jun 26

Delta flights from St. Louis to Duluth

Our best Delta deals on St. Louis to Duluth flight tickets
Delta
Jul 1
STL5:36 pmLambert-St Louis
5h 14m
1 stop
DLH10:50 pmDuluth Intl
Jul 7
DLH5:00 amDuluth Intl
3h 46m
1 stop
STL8:46 amLambert-St Louis
$257
Delta
Jul 1
STL5:36 pmLambert-St Louis
5h 14m
1 stop
DLH10:50 pmDuluth Intl
Jul 8
DLH5:00 amDuluth Intl
3h 46m
1 stop
STL8:46 amLambert-St Louis
$311
Delta
Jul 4
STL5:36 pmLambert-St Louis
5h 14m
1 stop
DLH10:50 pmDuluth Intl
Jul 10
DLH5:00 amDuluth Intl
5h 28m
1 stop
STL10:28 amLambert-St Louis
$322

United Airlines flights from St. Louis to Duluth

Our best United Airlines deals on St. Louis to Duluth flight tickets
United Airlines
Jul 1
STL5:59 pmLambert-St Louis
5h 24m
1 stop
DLH11:23 pmDuluth Intl
Jul 8
DLH6:25 pmDuluth Intl
5h 04m
1 stop
STL11:29 pmLambert-St Louis
$360
United Airlines
Jun 16
STL6:00 amLambert-St Louis
4h 43m
1 stop
DLH10:43 amDuluth Intl
Jun 20
DLH7:06 amDuluth Intl
5h 05m
1 stop
STL12:11 pmLambert-St Louis
$479
United Airlines
Jun 20
STL7:05 pmLambert-St Louis
4h 18m
1 stop
DLH11:23 pmDuluth Intl
Jun 24
DLH11:18 amDuluth Intl
4h 28m
1 stop
STL3:46 pmLambert-St Louis
$562

momondo 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, momondo users made 832,500 searches. Data last updated June 6, 2026.
Use the filters below to find and compare flights from St. Louis to Duluth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Wed 7/1

5:36 pm-10:50 pm

1 stop5h 14m

Duluth Intl

Tue 7/7

5:00 am-8:46 am

1 stop3h 46m

$257

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Wed 7/1

5:36 pm-10:50 pm

1 stop5h 14m

Duluth Intl

Wed 7/8

5:00 am-8:46 am

1 stop3h 46m

$311

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 7/4

5:36 pm-10:50 pm

1 stop5h 14m

Duluth Intl

Fri 7/10

5:00 am-10:28 am

1 stop5h 28m

$322

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 9/25

5:43 pm-10:35 pm

1 stop4h 52m

Duluth Intl

Mon 9/28

5:15 am-10:26 am

1 stop5h 11m

$353

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Wed 7/1

5:36 pm-10:50 pm

1 stop5h 14m

Duluth Intl

Tue 7/7

5:00 am-8:46 am

1 stop3h 46m

$387

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Tue 6/16

6:00 am-10:43 am

1 stop4h 43m

Duluth Intl

Sat 6/20

7:06 am-12:11 pm

1 stop5h 05m

$479

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 7/3

11:18 am-3:23 pm

1 stop4h 05m

Duluth Intl

Sun 7/5

5:00 am-10:28 am

1 stop5h 28m

$548
Quickest round-trip

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 6/20

7:05 pm-11:23 pm

1 stop4h 18m

Duluth Intl

Wed 6/24

11:18 am-3:46 pm

1 stop4h 28m

$562

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 7/4

5:59 pm-11:23 pm

1 stop5h 24m

Duluth Intl

Fri 7/10

6:25 pm-10:27 am

2 stops16h 02m

$572

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Wed 6/24

6:00 am-10:43 am

1 stop4h 43m

Duluth Intl

Fri 6/26

6:25 pm-11:29 pm

1 stop5h 04m

$606

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

See travel insights to Duluth from

How to get the cheapest flight ticket from St. Louis to Duluth

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Duluth?

What is the cheapest month to fly to Duluth?

The cheapest month to fly to Duluth from St. Louis is in December. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of December, then book flights to Duluth from St. Louis during April instead. Flights to Duluth in April, while not as cheap as those in December, still average around $233.

When to book flights from St. Louis to Duluth

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Duluth according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Duluth (STL to DLH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Duluth

Fastest flight time

4h 18m

Direct flights

None
The fastest flight from St. Louis to Duluth takes 4h 18m
There are no direct flights from St. Louis to Duluth. There are no popular flight routes from St. Louis to Duluth.
Search flight deals

Frequently asked questions about flying from St. Louis to Duluth

  • How far is Lambert-St Louis to Duluth Intl by plane?

    Lambert-St Louis and Duluth Intl are 571.3 mi apart from one another. In terms of flight time, this usually takes a little over 4h 18m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Duluth Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Duluth Intl Airport were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Duluth Intl Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Duluth Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Duluth Intl Airport.

  • What documentation or ID do you need to fly to Duluth Intl Airport?

    The necessary travel and health documents for your Duluth Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Duluth?

Best airlines flying from St. Louis to Duluth

Compare and see reviews for airlines that fly from St. Louis to Duluth with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $233Free CancellationRating
7.8
8,395 reviews
Search Delta flights

Traveling to a place near Duluth?

Book flights to Duluth if you plan to visit one of these locations
Two Harbors
Superior
Hayward
Cloquet

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Duluth?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Duluth. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Duluth with flexible booking policies on momondo?

Flights from St. Louis to Duluth with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Duluth?

Once you have performed a search for St. Louis to Duluth flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Duluth right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Duluth now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Duluth and let you know when they change.

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