$100 Cheap Flights from Green Bay (GRB) to St. Louis (STL)

View $100 flight on Sun, May 25, 2025Opens in a new window

Popular airlines from Green Bay Austin Straubel Intl. Airport (GRB) to St. Louis Lambert Intl. Airport (STL)

Find available prices by choosing your travel dates.

Cheap Flights from Green Bay to St. Louis (GRB-STL)

Prices were available within the past 7 days and start at $100 for one-way flights and $199 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, May 24 - Thu, May 29
GRB
Green Bay
STL
St. Louis
$199 Roundtrip, found 1 day ago
$199
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, May 24 from Green Bay to St. Louis, returning Thu, May 29, priced at $199 found 1 day ago
American Airlines
Thu, May 29 - Sat, May 31
GRB
Green Bay
STL
St. Louis
$200 Roundtrip, found 2 days ago
$200
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, May 29 from Green Bay to St. Louis, returning Sat, May 31, priced at $200 found 2 days ago
United
Thu, May 29 - Sat, May 31
GRB
Green Bay
STL
St. Louis
$209 Roundtrip, found 2 days ago
$209
Roundtrip
found 2 days ago
Select United flight, departing Thu, May 29 from Green Bay to St. Louis, returning Sat, May 31, priced at $209 found 2 days ago
American Airlines
Thu, May 29 - Sun, Jun 1
GRB
Green Bay
STL
St. Louis
$214 Roundtrip, found 2 days ago
$214
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, May 29 from Green Bay to St. Louis, returning Sun, Jun 1, priced at $214 found 2 days ago
Delta
Thu, May 8 - Sun, May 25
GRB
Green Bay
STL
St. Louis
$219 Roundtrip, found 1 day ago
$219
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, May 8 from Green Bay to St. Louis, returning Sun, May 25, priced at $219 found 1 day ago
United
Thu, May 29 - Mon, Jun 2
GRB
Green Bay
STL
St. Louis
$222 Roundtrip, found 2 days ago
$222
Roundtrip
found 2 days ago
Select United flight, departing Thu, May 29 from Green Bay to St. Louis, returning Mon, Jun 2, priced at $222 found 2 days ago
Delta
Sun, May 25 - Tue, May 27
GRB
Green Bay
STL
St. Louis
$225 Roundtrip, found 1 day ago
$225
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, May 25 from Green Bay to St. Louis, returning Tue, May 27, priced at $225 found 1 day ago
American Airlines
Thu, May 15 - Tue, May 27
GRB
Green Bay
STL
St. Louis
$229 Roundtrip, found 3 hours ago
$229
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, May 15 from Green Bay to St. Louis, returning Tue, May 27, priced at $229 found 3 hours ago
United
Fri, May 30 - Sat, May 31
GRB
Green Bay
STL
St. Louis
$230 Roundtrip, found 2 days ago
$230
Roundtrip
found 2 days ago
Select United flight, departing Fri, May 30 from Green Bay to St. Louis, returning Sat, May 31, priced at $230 found 2 days ago
Delta
Thu, May 29 - Sat, May 31
GRB
Green Bay
STL
St. Louis
$231 Roundtrip, found 2 days ago
$231
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, May 29 from Green Bay to St. Louis, returning Sat, May 31, priced at $231 found 2 days ago
Flights from Green Bay (GRB) to St. Louis (STL)
Origin airport
Austin Straubel Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$198
Distance
413 mi

Green Bay to St. Louis Flights

The cheapest times to fly from Green Bay 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 Green Bay to St. Louis are during the month of May. You can find some of the cheapest flights from Green Bay to St. Louis with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Green Bay to St. Louis

Sunday is one of the best days to book for cheap flights from Green Bay 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 Green Bay 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 Green Bay to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $100 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 Green Bay 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 Green Bay 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 Austin Straubel Intl. Airport (GRB) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from GRB 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 GRB to STL?
The cheapest flights from GRB 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 GRB to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from GRB to STL. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Austin Straubel Intl. Airport (GRB) to Lambert-St. Louis Intl. Airport (STL)?
There aren’t any daily direct flights departing from Austin Straubel Intl. Airport (GRB) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search on Expedia to include one or more stops, and you’ll be soaring above the clouds in no time.
What day of the week has the most flights from GRB to STL?
You’ll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Austin Straubel Intl. Airport (GRB) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Austin Straubel Intl. Airport (GRB) to Lambert-St. Louis Intl. Airport (STL) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of being canceled.**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 Austin Straubel Intl. Airport (GRB) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from GRB to STL are typically more expensive. To secure the cheapest rates, start looking for flights as early as possible. That being said, if your travel plans are flexible, it’s possible to score a cheap ticket just before your departure.
Is it cheaper to book a GRB to STL flight and hotel package?
Opting for a GRB to STL flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Pick from our wide range of accommodations and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Austin Straubel Intl. Airport (GRB) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your GRB to STL flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

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*Available to One Key members.