What is the cheapest airline that flies from Lambert-St Louis to Duluth Intl?

Delta and United Airlines are the most popular carriers operating from Lambert-St Louis to Duluth Intl

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?

As of September 2025, there are 2 operators available to choose from 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.

$138 Cheap Flights from St. Louis to Duluth in 2025/26

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Find the cheapest flights from St. Louis to Duluth

Round-trip

One-way

Cheap round-trip flights

6:30 am - 11:07 amSTL-DLH

4h 37m1 stop

5:10 am - 8:54 amDLH-STL

3h 44m1 stop

$263Delta

Find Deal

Sat, Mar 7 - Wed, Mar 11

6:00 am - 11:22 amSTL-DLH

5h 22m1 stop

5:18 am - 8:51 amDLH-STL

3h 33m1 stop

$283Delta

Find Deal

Wed, Oct 22 - Sun, Oct 26

6:30 am - 10:45 amSTL-DLH

4h 15m1 stop

9:45 am - 2:27 pmDLH-STL

4h 42m1 stop

$318United Airlines

Find Deal

Tue, Sep 30 - Sat, Oct 4

5:00 am - 10:45 amSTL-DLH

5h 45m1 stop

9:45 am - 3:44 pmDLH-STL

5h 59m1 stop

$332United Airlines

Find Deal

Wed, Oct 1 - Sun, Oct 5

6:30 am - 10:45 amSTL-DLH

4h 15m1 stop

11:20 am - 3:44 pmDLH-STL

4h 24m1 stop

$351United Airlines

Find Deal

Fri, Oct 17 - Mon, Oct 20

5:30 pm - 9:59 pmSTL-DLH

4h 29m1 stop

7:55 am - 2:25 pmDLH-STL

6h 30m1 stop

$354United Airlines

Find Deal

Tue, Nov 25 - Sat, Nov 29

6:30 am - 11:07 amSTL-DLH

4h 37m1 stop

5:10 am - 4:55 pmDLH-STL

11h 45m2 stops

$355Delta

Find Deal

Sat, Mar 7 - Wed, Mar 11

6:30 am - 11:07 amSTL-DLH

4h 37m1 stop

5:10 am - 4:55 pmDLH-STL

11h 45m2 stops

$373Delta

Find Deal

Sat, Mar 7 - Wed, Mar 11

6:00 am - 11:22 amSTL-DLH

5h 22m1 stop

5:18 am - 8:51 amDLH-STL

3h 33m1 stop

$388Delta

Find Deal

Thu, Oct 16 - Sun, Oct 19

6:00 am - 11:22 amSTL-DLH

5h 22m1 stop

5:18 am - 8:51 amDLH-STL

3h 33m1 stop

$438Delta

Find Deal

Fri, Oct 24 - Sun, Oct 26

United Airlines flights from St. Louis to Duluth

Our best United Airlines deals on St. Louis to Duluth flight tickets

United Airlines

Sep 30

STL6:30 amLambert-St Louis

4h 15m

1 stop

DLH10:45 amDuluth Intl

Oct 4

DLH9:45 amDuluth Intl

4h 42m

1 stop

STL2:27 pmLambert-St Louis

$318

Find similar

United Airlines

Oct 1

STL5:00 amLambert-St Louis

5h 45m

1 stop

DLH10:45 amDuluth Intl

Oct 5

DLH9:45 amDuluth Intl

5h 59m

1 stop

STL3:44 pmLambert-St Louis

$332

Find similar

United Airlines

Oct 17

STL6:30 amLambert-St Louis

4h 15m

1 stop

DLH10:45 amDuluth Intl

Oct 20

DLH11:20 amDuluth Intl

4h 24m

1 stop

STL3:44 pmLambert-St Louis

$351

Find similar

Delta flights from St. Louis to Duluth

Our best Delta deals on St. Louis to Duluth flight tickets

Delta

Mar 7

STL6:30 amLambert-St Louis

4h 37m

1 stop

DLH11:07 amDuluth Intl

Mar 11

DLH5:10 amDuluth Intl

3h 44m

1 stop

STL8:54 amLambert-St Louis

$263

Find similar

Delta

Oct 22

STL6:00 amLambert-St Louis

5h 22m

1 stop

DLH11:22 amDuluth Intl

Oct 26

DLH5:18 amDuluth Intl

3h 33m

1 stop

STL8:51 amLambert-St Louis

$283

Find similar

Delta

Mar 7

STL6:30 amLambert-St Louis

4h 37m

1 stop

DLH11:07 amDuluth Intl

Mar 11

DLH5:10 amDuluth Intl

11h 45m

2 stops

STL4:55 pmLambert-St Louis

$355

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 3/7

6:30 am-11:07 am

1 stop4h 37m

Duluth Intl

Wed 3/11

5:10 am-8:54 am

1 stop3h 44m

$263

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Wed 10/22

6:00 am-11:22 am

1 stop5h 22m

Duluth Intl

Sun 10/26

5:18 am-8:51 am

1 stop3h 33m

$283

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Tue 9/30

6:30 am-10:45 am

1 stop4h 15m

Duluth Intl

Sat 10/4

9:45 am-2:27 pm

1 stop4h 42m

$318

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Wed 10/1

5:00 am-10:45 am

1 stop5h 45m

Duluth Intl

Sun 10/5

9:45 am-3:44 pm

1 stop5h 59m

$332

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 10/17

6:30 am-10:45 am

1 stop4h 15m

Duluth Intl

Mon 10/20

11:20 am-3:44 pm

1 stop4h 24m

$351

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Tue 11/25

5:30 pm-9:59 pm

1 stop4h 29m

Duluth Intl

Sat 11/29

7:55 am-2:25 pm

1 stop6h 30m

$354

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 3/7

6:30 am-11:07 am

1 stop4h 37m

Duluth Intl

Wed 3/11

5:10 am-4:55 pm

2 stops11h 45m

$355

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Sat 3/7

6:30 am-11:07 am

1 stop4h 37m

Duluth Intl

Wed 3/11

5:10 am-4:55 pm

2 stops11h 45m

$373

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Thu 10/16

6:00 am-11:22 am

1 stop5h 22m

Duluth Intl

Sun 10/19

5:18 am-8:51 am

1 stop3h 33m

$388

St. LouisDuluth

STL - DLH

STLDLH

Lambert-St Louis

Fri 10/24

6:00 am-11:22 am

1 stop5h 22m

Duluth Intl

Sun 10/26

5:18 am-8:51 am

1 stop3h 33m

$438

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 $265.

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

Direct flights	None

There are no direct flights from St. Louis to Duluth. There are no popular flight routes from St. Louis to Duluth.

Search flight deals

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 07m.
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?
As of September 2025, there are 2 operators available to choose from 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?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Duluth is Delta, representing 64% of all bookings. The subsequent popular airline is United Airlines at 36%.

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 Airlines	PriceFrom $238	Free Cancellation	Rating 7.4 8,926 reviews		Search United Airlines flights
Delta	PriceFrom $238	Free Cancellation	Rating 7.9 7,961 reviews		Search Delta flights

Two Harbors

Hayward

Superior

Cloquet

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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.