Cheap Flights from St. Louis (STL) to Duluth (SUW)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong)

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Alternative airports near Duluth

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Duluth Intl. DLH. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $243
DLH
Duluth Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $243
Flights from St. Louis (STL) to Duluth (SUW)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Richard I. Bong
Distance
555 mi

St. Louis to Duluth Flights

The cheapest times to fly from St. Louis to Duluth

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Duluth are during the month of . You can find some of the cheapest flights from St. Louis to Duluth with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Duluth

Sunday is one of the best days to book for cheap flights from St. Louis to Duluth: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Duluth

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Duluth in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Duluth flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Duluth airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong) cost?
Grab a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong)?
is the cheapest month to fly from STL to SUW. Timing your trip outside of the busy season is often the key to finding a great deal.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest STL to SUW flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong)?
There aren't any daily nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from STL to SUW?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on various factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong)?
Select a flight from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong) last-minute?
Booking your plane ticket from STL to SUW just before your trip is generally more expensive. However, if you're flexible with your departure dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a STL to SUW flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to SUW flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one easy place will take the hassle out of planning your trip. Simply secure your flights and choose from our wide range of stays, then personalize your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Duluth, MN (SUW-Richard I. Bong)?
Typically, you can cancel or modify your STL to SUW flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you need more details, head to our Customer Service portal.

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