$122 Cheap United flights St. Louis (STL) to Duluth (DLH)

View $122 flight on Wed, Sep 3, 2025Opens in a new window

$122 Cheap United flights St. Louis (STL) to Duluth (DLH)

Prices were available within the past 7 days and start at $122 for one-way flights and $238 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 16 - Sat, Sep 20
STL
St. Louis
DLH
Duluth
$238 Roundtrip, found 2 days ago
$238
Roundtrip
found 2 days ago
Select United flight, departing Tue, Sep 16 from St. Louis to Duluth, returning Sat, Sep 20, priced at $238 found 2 days ago
United
Sat, Sep 20 - Wed, Sep 24
STL
St. Louis
DLH
Duluth
$259 Roundtrip, found 4 days ago
$259
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 20 from St. Louis to Duluth, returning Wed, Sep 24, priced at $259 found 4 days ago
United
Wed, Aug 27 - Wed, Sep 3
STL
St. Louis
DLH
Duluth
$273 Roundtrip, found 4 days ago
$273
Roundtrip
found 4 days ago
Select United flight, departing Wed, Aug 27 from St. Louis to Duluth, returning Wed, Sep 3, priced at $273 found 4 days ago
United
Sat, Sep 20 - Wed, Sep 24
STL
St. Louis
DLH
Duluth
$295 Roundtrip, found 4 days ago
$295
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 20 from St. Louis to Duluth, returning Wed, Sep 24, priced at $295 found 4 days ago
United
Sat, Sep 6 - Mon, Sep 8
STL
St. Louis
DLH
Duluth
$312 Roundtrip, found 1 day ago
$312
Roundtrip
found 1 day ago
Select United flight, departing Sat, Sep 6 from St. Louis to Duluth, returning Mon, Sep 8, priced at $312 found 1 day ago
United
Fri, Sep 5 - Fri, Sep 12
STL
St. Louis
DLH
Duluth
$313 Roundtrip, found 2 days ago
$313
Roundtrip
found 2 days ago
Select United flight, departing Fri, Sep 5 from St. Louis to Duluth, returning Fri, Sep 12, priced at $313 found 2 days ago
Flights from St. Louis (STL) to Duluth (DLH)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Duluth Intl.
Airlines serving
Delta, United
Popular airline
United
Distance
566 mi

Frequently asked questions

How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Duluth Intl. Airport (DLH)?
Scoring cheap one-way United Airlines flights from STL to DLH from $122 on Expedia is simple — just filter by "Price (lowest to highest)." Or check out our affordable return fares from $238 for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to DLH with United Airlines?
January is one of the least expensive months to travel to Duluth with United Airlines. You could also find great prices on return and one-way tickets in February.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Duluth Intl. Airport (DLH) with United Airlines?
To find cheap United Airlines fares from Lambert-St. Louis Intl. Airport (STL) to Duluth Intl. Airport (DLH), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect the overall price. Sunday is generally the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Duluth Intl. Airport (DLH)?
Select our "Nonstop" filter when looking for direct United Airlines flights from STL to DLH. It's also a good way to compare other airlines servicing the same nonstop trip.
What is the earliest United Airlines flight from STL to DLH?
To find the earliest departures from STL to DLH with United Airlines, filter your results by "Early Morning" and "Morning." Booking an early flight generally means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Duluth?
Jump on a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Duluth, and you'll likely come in to Duluth Intl. Airport (DLH). This is the airline's primary hub in this destination.
Why fly with United Airlines from STL to DLH?
A rewarding loyalty program and the chance to rack up points through United Mileage Plus are the start of the reasons to depart from STL to DLH with United Airlines. Plus, by joining Expedia's free One Key™ program, you can earn OneKeyCash™* alongside United Airlines's loyalty program earnings. It's yours to spend on your next adventure.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Duluth Intl. Airport (DLH)?
In most cases, you can reschedule or cancel your flight, although additional charges may apply if you booked over 24 hours ago. Want to keep your options open? Use Expedia's "No cancel fee" and "Changes included" filters to find flights that won't charge you extra if you have to alter your plans. To update your booking, go to "Trips," select your flight and click on "Manage Booking" for more details.

Explore a world of travel with Expedia

*Available to One Key members.