Cheap flights from St. Louis to Duluth from $369

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 8/9. 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
0 bags

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Cheap round-trip flights

United Airlines Logo
3:23 pm - 10:08 pmSTL-DLH
6h 45m1 stop
United Airlines Logo
9:45 am - 2:27 pmDLH-STL
4h 42m1 stop
$427United Airlines
Find Deal
Fri, Oct 17 - Mon, Oct 20
Delta Logo
5:30 pm - 10:44 pmSTL-DLH
5h 14m1 stop
Delta Logo
5:10 am - 8:36 amDLH-STL
3h 26m1 stop
$453Delta
Find Deal
Fri, Aug 15 - Tue, Aug 19
United Airlines Logo
7:04 pm - 10:05 pmSTL-DLH
27h 01m1 stop
United Airlines Logo
11:20 am - 6:23 pmDLH-STL
7h 03m1 stop
$498United Airlines
Find Deal
Fri, Sep 19 - Mon, Sep 22
Delta Logo
6:00 am - 10:15 amSTL-DLH
4h 15m1 stop
Delta Logo
5:10 am - 8:36 amDLH-STL
3h 26m1 stop
$526Delta
Find Deal
Fri, Aug 29 - Mon, Sep 1
Delta Logo
6:00 am - 10:15 amSTL-DLH
4h 15m1 stop
Delta Logo
5:10 am - 8:36 amDLH-STL
3h 26m1 stop
$532Delta
Find Deal
Fri, Aug 29 - Mon, Sep 1
United Airlines Logo
7:04 pm - 10:05 pmSTL-DLH
27h 01m1 stop
United Airlines Logo
11:20 am - 11:53 pmDLH-STL
12h 33m2 stops
$581United Airlines
Find Deal
Fri, Sep 19 - Mon, Sep 22
Delta Logo
6:00 am - 10:13 amSTL-DLH
4h 13m1 stop
Delta Logo
7:50 am - 2:30 pmDLH-STL
6h 40m1 stop
$618Delta
Find Deal
Thu, Aug 14 - Mon, Aug 18
United Airlines Logo
5:15 am - 10:00 pmSTL-DLH
40h 45m2 stops
United Airlines Logo
3:10 pm - 9:32 pmDLH-STL
6h 22m1 stop
$675United Airlines
Find Deal
Fri, Aug 15 - Tue, Aug 19
United Airlines Logo
1:40 pm - 10:43 amSTL-DLH
21h 03m2 stops
United Airlines Logo
9:45 am - 2:27 pmDLH-STL
4h 42m1 stop
$694United Airlines
Find Deal
Fri, Oct 17 - Mon, Oct 20
United Airlines Logo
5:00 am - 10:51 amSTL-DLH
5h 51m1 stop
United Airlines Logo
8:00 am - 3:47 pmDLH-STL
7h 47m1 stop
$912United Airlines
Find Deal
Wed, Aug 13 - Sat, Aug 16

United Airlines flights from St. Louis to Duluth

Our best United Airlines deals on St. Louis to Duluth flight tickets
United Airlines
Oct 17
STL3:23 pmLambert-St Louis
6h 45m
1 stop
DLH10:08 pmDuluth Intl
Oct 20
DLH9:45 amDuluth Intl
4h 42m
1 stop
STL2:27 pmLambert-St Louis
United Airlines
Sep 19
STL7:04 pmLambert-St Louis
27h 01m
1 stop
DLH10:05 pmDuluth Intl
Sep 22
DLH11:20 amDuluth Intl
7h 03m
1 stop
STL6:23 pmLambert-St Louis
United Airlines
Sep 19
STL7:04 pmLambert-St Louis
27h 01m
1 stop
DLH10:05 pmDuluth Intl
Sep 22
DLH11:20 amDuluth Intl
12h 33m
2 stops
STL11:53 pmLambert-St Louis

Delta flights from St. Louis to Duluth

Our best Delta deals on St. Louis to Duluth flight tickets
Delta
Aug 15
STL5:30 pmLambert-St Louis
5h 14m
1 stop
DLH10:44 pmDuluth Intl
Aug 19
DLH5:10 amDuluth Intl
3h 26m
1 stop
STL8:36 amLambert-St Louis
Delta
Aug 29
STL6:00 amLambert-St Louis
4h 15m
1 stop
DLH10:15 amDuluth Intl
Sep 1
DLH5:10 amDuluth Intl
3h 26m
1 stop
STL8:36 amLambert-St Louis
Delta
Aug 29
STL6:00 amLambert-St Louis
4h 15m
1 stop
DLH10:15 amDuluth Intl
Sep 1
DLH5:10 amDuluth Intl
3h 26m
1 stop
STL8:36 amLambert-St Louis

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 31, 2025.
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

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 10/17

3:23 pm-10:08 pm

1 stop6h 45m

Duluth Intl

Mon 10/20

9:45 am-2:27 pm

1 stop4h 42m

$427

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 8/15

5:30 pm-10:44 pm

1 stop5h 14m

Duluth Intl

Tue 8/19

5:10 am-8:36 am

1 stop3h 26m

$453

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 9/19

7:04 pm-10:05 pm

1 stop27h 01m

Duluth Intl

Mon 9/22

11:20 am-6:23 pm

1 stop7h 03m

$498

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 8/29

6:00 am-10:15 am

1 stop4h 15m

Duluth Intl

Mon 9/1

5:10 am-8:36 am

1 stop3h 26m

$526

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 8/29

6:00 am-10:15 am

1 stop4h 15m

Duluth Intl

Mon 9/1

5:10 am-8:36 am

1 stop3h 26m

$532

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 9/19

7:04 pm-10:05 pm

1 stop27h 01m

Duluth Intl

Mon 9/22

11:20 am-11:53 pm

2 stops12h 33m

$581

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Thu 8/14

6:00 am-10:13 am

1 stop4h 13m

Duluth Intl

Mon 8/18

7:50 am-2:30 pm

1 stop6h 40m

$618

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 8/15

5:15 am-10:00 pm

2 stops40h 45m

Duluth Intl

Tue 8/19

3:10 pm-9:32 pm

1 stop6h 22m

$675

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 10/17

1:40 pm-10:43 am

2 stops21h 03m

Duluth Intl

Mon 10/20

9:45 am-2:27 pm

1 stop4h 42m

$694

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Wed 8/13

5:00 am-10:51 am

1 stop5h 51m

Duluth Intl

Sat 8/16

8:00 am-3:47 pm

1 stop7h 47m

$912

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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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 April. Flight prices, which tend to average around $238, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Duluth from St. Louis during January instead. Flights to Duluth in January, while not as cheap as those in April, still average around $288.

What is the cheapest day to depart on your flight to Duluth?

The cheapest day to depart from St. Louis to Duluth is on a Tuesday when prices can be found for as low as $262. On the other hand, Monday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $577.

What is the cheapest time of day to depart on your flight to Duluth?

Flying to Duluth from St. Louis in the morning is the least expensive time of day to depart. momondo users have found prices as low as $308 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Duluth is in the afternoon when prices are around $415.

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

Best Price Found

$369

Fastest flight time

3h 53m

Direct flights

None

Airports in Duluth

1 airport
The best one-way flight to Duluth from St. Louis in the past 72 hours is $369. The best round-trip flight deal from St. Louis to Duluth found on momondo in the last 72 hours is $427.
The fastest flight from St. Louis to Duluth takes 3h 53m
There are no direct flights from St. Louis to Duluth. Popular non-direct route for this connection is Lambert-St Louis Airport - Duluth Intl Airport.
There is 1 airport near Duluth: Duluth Intl (DLH)

  • 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 13m.

  • 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
United AirlinesPriceFrom $238Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
DeltaPriceFrom $238Free CancellationRating
8.0
7,981 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
Hayward
Superior
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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1 adult
Tue 8/5
Tue 8/12

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