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Cheap flights from St. Louis to Duluth from $168

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Duluth departing on 8/31. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Duluth

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
5:34 pm - 10:41 pm
STL
-
DLH
5h 07m
1 stop
Delta Logo
5:15 am - 8:37 am
DLH
-
STL
3h 22m
1 stop
$308Delta
Fri, Aug 21 - Tue, Aug 25
United Airlines Logo
5:36 pm - 11:22 pm
STL
-
DLH
5h 46m
1 stop
United Airlines Logo
3:10 pm - 9:21 pm
DLH
-
STL
6h 11m
1 stop
$323United Airlines
Fri, Oct 2 - Mon, Oct 5
United Airlines Logo
5:59 pm - 11:23 pm
STL
-
DLH
5h 24m
1 stop
United Airlines Logo
6:23 pm - 10:59 pm
DLH
-
STL
4h 36m
1 stop
$338United Airlines
Sat, Aug 8 - Wed, Aug 12
Delta Logo
5:34 pm - 10:41 pm
STL
-
DLH
5h 07m
1 stop
Delta Logo
5:15 am - 8:37 am
DLH
-
STL
3h 22m
1 stop
$348Delta
Sat, Aug 8 - Tue, Aug 11
Delta Logo
6:15 am - 11:03 am
STL
-
DLH
4h 48m
1 stop
Delta Logo
5:15 am - 10:31 am
DLH
-
STL
5h 16m
1 stop
$432Delta
Fri, Sep 18 - Mon, Sep 21
United Airlines Logo
5:59 pm - 11:23 pm
STL
-
DLH
5h 24m
1 stop
United Airlines Logo
6:25 pm - 11:29 pm
DLH
-
STL
5h 04m
1 stop
$491United Airlines
Fri, Aug 7 - Mon, Aug 10
United Airlines Logo
5:59 pm - 11:23 pm
STL
-
DLH
5h 24m
1 stop
United Airlines Logo
6:25 pm - 11:29 pm
DLH
-
STL
5h 04m
1 stop
$507United Airlines
Thu, Aug 6 - Mon, Aug 10
United Airlines Logo
5:30 pm - 11:22 pm
STL
-
DLH
5h 52m
1 stop
United Airlines Logo
6:23 pm - 12:40 pm
DLH
-
STL
18h 17m
2 stops
$512United Airlines
Fri, Aug 21 - Tue, Aug 25
Delta Logo
6:30 am - 11:15 am
STL
-
DLH
4h 45m
1 stop
Delta Logo
5:10 am - 11:50 am
DLH
-
STL
6h 40m
1 stop
$532Delta
Sat, Dec 26 - Thu, Dec 31
Delta Logo
12:30 pm - 3:44 pm
STL
-
DLH
3h 14m
1 stop
Delta Logo
5:10 am - 11:50 am
DLH
-
STL
6h 40m
1 stop
$571Delta
Fri, Jan 1 - Sun, Jan 3

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Delta flights from St. Louis to Duluth

Our best Delta deals on St. Louis to Duluth flight tickets
Delta
Aug 21
STL5:34 pmLambert-St Louis
5h 07m
1 stop
DLH10:41 pmDuluth Intl
Aug 25
DLH5:15 amDuluth Intl
3h 22m
1 stop
STL8:37 amLambert-St Louis
$308
Delta
Aug 8
STL5:34 pmLambert-St Louis
5h 07m
1 stop
DLH10:41 pmDuluth Intl
Aug 11
DLH5:15 amDuluth Intl
3h 22m
1 stop
STL8:37 amLambert-St Louis
$348
Delta
Sep 18
STL6:15 amLambert-St Louis
4h 48m
1 stop
DLH11:03 amDuluth Intl
Sep 21
DLH5:15 amDuluth Intl
5h 16m
1 stop
STL10:31 amLambert-St Louis
$432

United Airlines flights from St. Louis to Duluth

Our best United Airlines deals on St. Louis to Duluth flight tickets
United Airlines
Oct 2
STL5:36 pmLambert-St Louis
5h 46m
1 stop
DLH11:22 pmDuluth Intl
Oct 5
DLH3:10 pmDuluth Intl
6h 11m
1 stop
STL9:21 pmLambert-St Louis
$323
United Airlines
Aug 8
STL5:59 pmLambert-St Louis
5h 24m
1 stop
DLH11:23 pmDuluth Intl
Aug 12
DLH6:23 pmDuluth Intl
4h 36m
1 stop
STL10:59 pmLambert-St Louis
$338
United Airlines
Aug 7
STL5:59 pmLambert-St Louis
5h 24m
1 stop
DLH11:23 pmDuluth Intl
Aug 10
DLH6:25 pmDuluth Intl
5h 04m
1 stop
STL11:29 pmLambert-St Louis
$491

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 July 27, 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
Quickest round-trip

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 8/21

5:34 pm-10:41 pm

1 stop5h 07m

Duluth Intl

Tue 8/25

5:15 am-8:37 am

1 stop3h 22m

$308

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 10/2

5:36 pm-11:22 pm

1 stop5h 46m

Duluth Intl

Mon 10/5

3:10 pm-9:21 pm

1 stop6h 11m

$323

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 8/8

5:59 pm-11:23 pm

1 stop5h 24m

Duluth Intl

Wed 8/12

6:23 pm-10:59 pm

1 stop4h 36m

$338

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 8/8

5:34 pm-10:41 pm

1 stop5h 07m

Duluth Intl

Tue 8/11

5:15 am-8:37 am

1 stop3h 22m

$348

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 9/18

6:15 am-11:03 am

1 stop4h 48m

Duluth Intl

Mon 9/21

5:15 am-10:31 am

1 stop5h 16m

$432

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 8/7

5:59 pm-11:23 pm

1 stop5h 24m

Duluth Intl

Mon 8/10

6:25 pm-11:29 pm

1 stop5h 04m

$491

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Thu 8/6

5:59 pm-11:23 pm

1 stop5h 24m

Duluth Intl

Mon 8/10

6:25 pm-11:29 pm

1 stop5h 04m

$507

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 8/21

5:30 pm-11:22 pm

1 stop5h 52m

Duluth Intl

Tue 8/25

6:23 pm-12:40 pm

2 stops18h 17m

$512

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 12/26

6:30 am-11:15 am

1 stop4h 45m

Duluth Intl

Thu 12/31

5:10 am-11:50 am

1 stop6h 40m

$532

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 1/1

12:30 pm-3:44 pm

1 stop3h 14m

Duluth Intl

Sun 1/3

5:10 am-11:50 am

1 stop6h 40m

$571

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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 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 45m

Direct flights

None
The fastest flight from St. Louis to Duluth takes 4h 45m
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 45m.

  • 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
8,482 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
Cloquet
Hayward

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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