$169 Cheap Flights from Dubuque (DBQ) to St. Louis (STL)

View $169 flight on Tue, Aug 19, 2025Opens in a new window

Popular airlines from Dubuque, IA (DBQ-Dubuque Regional) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Dubuque to St. Louis (DBQ-STL)

Prices were available within the past 7 days and start at $169 for one-way flights and $338 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KEY LIME AIR DBA DENVER AIR CONNECTION
Tue, Jul 29 - Sat, Aug 9
DBQ
Dubuque
STL
St. Louis
$338 Roundtrip, found 20 hours ago
$338
Roundtrip
found 20 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Tue, Jul 29 from Dubuque to St. Louis, returning Sat, Aug 9, priced at $338 found 20 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Tue, Jul 29 - Mon, Aug 4
DBQ
Dubuque
STL
St. Louis
$341 Roundtrip, found 20 hours ago
$341
Roundtrip
found 20 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Tue, Jul 29 from Dubuque to St. Louis, returning Mon, Aug 4, priced at $341 found 20 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Thu, Sep 18 - Mon, Sep 29
DBQ
Dubuque
STL
St. Louis
$344 Roundtrip, found 4 days ago
$344
Roundtrip
found 4 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, Sep 18 from Dubuque to St. Louis, returning Mon, Sep 29, priced at $344 found 4 days ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Thu, Jul 31 - Sat, Aug 9
DBQ
Dubuque
STL
St. Louis
$368 Roundtrip, found 20 hours ago
$368
Roundtrip
found 20 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, Jul 31 from Dubuque to St. Louis, returning Sat, Aug 9, priced at $368 found 20 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Thu, Jul 31 - Mon, Aug 4
DBQ
Dubuque
STL
St. Louis
$371 Roundtrip, found 20 hours ago
$371
Roundtrip
found 20 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, Jul 31 from Dubuque to St. Louis, returning Mon, Aug 4, priced at $371 found 20 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Aug 2 - Sat, Aug 9
DBQ
Dubuque
STL
St. Louis
$378 Roundtrip, found 20 hours ago
$378
Roundtrip
found 20 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Aug 2 from Dubuque to St. Louis, returning Sat, Aug 9, priced at $378 found 20 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Sat, Aug 2 - Mon, Aug 4
DBQ
Dubuque
STL
St. Louis
$381 Roundtrip, found 20 hours ago
$381
Roundtrip
found 20 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Sat, Aug 2 from Dubuque to St. Louis, returning Mon, Aug 4, priced at $381 found 20 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Mon, Jul 28 - Sat, Aug 9
DBQ
Dubuque
STL
St. Louis
$388 Roundtrip, found 20 hours ago
$388
Roundtrip
found 20 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Mon, Jul 28 from Dubuque to St. Louis, returning Sat, Aug 9, priced at $388 found 20 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Mon, Jul 28 - Mon, Aug 4
DBQ
Dubuque
STL
St. Louis
$391 Roundtrip, found 20 hours ago
$391
Roundtrip
found 20 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Mon, Jul 28 from Dubuque to St. Louis, returning Mon, Aug 4, priced at $391 found 20 hours ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Fri, Aug 1 - Tue, Aug 5
DBQ
Dubuque
STL
St. Louis
$398 Roundtrip, found 20 hours ago
$398
Roundtrip
found 20 hours ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Fri, Aug 1 from Dubuque to St. Louis, returning Tue, Aug 5, priced at $398 found 20 hours ago
Flights from Dubuque (DBQ) to St. Louis (STL)
Origin airport
Dubuque Regional
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
$338
Distance
253 mi

Dubuque to St. Louis Flights

The cheapest times to fly from Dubuque to St. Louis

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 Dubuque to St. Louis are during the month of July. You can find some of the cheapest flights from Dubuque to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Dubuque to St. Louis: 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 Dubuque to St. Louis

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 Dubuque to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $169 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 Dubuque to St. Louis 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 Dubuque to St. Louis 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 Dubuque Regional Airport (DBQ) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from DBQ to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from DBQ to STL?
The cheapest flights from DBQ to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from DBQ to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from DBQ to STL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Dubuque Regional Airport (DBQ) to Lambert-St. Louis Intl. Airport (STL)?
There are no daily nonstop flights from Dubuque Regional Airport (DBQ) to Lambert-St. Louis Intl. Airport (STL). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time at all.
What day of the week has the most flights from DBQ to STL?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Dubuque Regional Airport (DBQ) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Dubuque Regional Airport (DBQ) to Lambert-St. Louis Intl. Airport (STL) route, aim to fly before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**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 Dubuque Regional Airport (DBQ) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from DBQ to STL shortly before your getaway is generally more expensive. However, if you're flexible with your travel times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a DBQ to STL flight and hotel package?
Opting for a DBQ to STL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our impressive range of accommodations and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Dubuque Regional Airport (DBQ) to Lambert-St. Louis Intl. Airport (STL)?
Usually, it's possible to reschedule or cancel your DBQ to STL flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.