What are the cheapest airlines flying from Green Bay to St. Louis round-trip?

Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $229. Additional round-trip tickets that might be worth considering are offered by United Airlines and Frontier, with the lowest prices starting at $336 and $424, respectively. American Airlines is currently priced 31% below the average price you’ll pay for this route.

What is the cheapest day to fly from Green Bay to St. Louis?

Travelers seeking maximum savings on their Green Bay to St. Louis flight should consider departing on Thursday afternoons when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What are the most popular airlines that fly from Green Bay to St. Louis?

The most popular airlines flying from Green Bay to St. Louis are American Airlines, Delta and United Airlines. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Green Bay to St. Louis?

Users have found that leaving on a Thursday can be a cost-effective option. It’s possible to save up to 65% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from Green Bay to St. Louis?

Due to multiple factors, expect to potentially pay more when booking in May. For low rates, December can be a great choice for travel to St. Louis. Flights to St. Louis from Green Bay in December are about $334 on average during December, but can be found for as low as $218.

Can I find deals for flights from Green Bay to St. Louis that include hotel bookings?

Yes. In addition to deals on Green Bay to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Green Bay to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Green Bay to St. Louis.

Can I find deals for business class flights from Green Bay to St. Louis?

Yes. Cheapflights offers flight deals from Green Bay to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$229+ Flights from Green Bay to St. Louis

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Cheap flight deals from Green Bay to St. Louis

Round-trip from	$229 (American Airlines)
Popular in	May
Cheapest in	December
Average price	$322

From Green Bay Austin-Straubel to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 21% potential increase in price ($90 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

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Find flight deals from Green Bay to St. Louis

Cheapest flights from Green Bay to St. Louis
Explore the most affordable flight options available from Green Bay to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Fri 8/156:26 pmGRB - STL

1 stop5h 25mAmerican Airlines

Sat 8/236:00 amSTL - GRB

1 stop3h 12mAmerican Airlines

Deal found 7/1

$229

Tue 7/156:15 amGRB - STL

1 stop6h 12mUnited Airlines

Sat 7/195:30 pmSTL - GRB

1 stop4h 07mUnited Airlines

Deal found 6/30

$336

Fri 7/187:52 pmGRB - STL

1 stop13h 19mFrontier

Sun 7/207:54 pmSTL - GRB

2 stops23h 01mFrontier

Deal found 6/29

$424

Best flights from Green Bay to St. Louis
Discover carefully curated flight deals from Green Bay to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 1, 2025.

Fri 8/156:26 pmGRB - STL

1 stop5h 25mAmerican Airlines

Sat 8/236:00 amSTL - GRB

1 stop3h 12mAmerican Airlines

Deal found 7/1

$229

Tue 7/156:15 amGRB - STL

1 stop6h 12mUnited Airlines

Sat 7/195:30 pmSTL - GRB

1 stop4h 07mUnited Airlines

Deal found 6/30

$336

Fri 7/187:52 pmGRB - STL

1 stop13h 19mFrontier

Sun 7/207:54 pmSTL - GRB

2 stops23h 01mFrontier

Deal found 6/29

$424

Last-minute flights from Green Bay to St. Louis
Discover last-minute flight deals from Green Bay to St. Louis. Data last updated July 1, 2025 and is based on user searches.

Tue 7/88:00 amGRB - STL

1 stop6h 37mUnited Airlines

Wed 7/95:00 amSTL - GRB

1 stop5h 11mUnited Airlines

Deal found 7/1

$599

Tue 7/82:51 pmGRB - STL

1 stop5h 28mAmerican Airlines

Wed 7/94:45 pmSTL - GRB

2 stops6h 44mAmerican Airlines

Deal found 7/1

$604

Tue 7/156:15 amGRB - STL

1 stop6h 12mUnited Airlines

Sat 7/195:30 pmSTL - GRB

1 stop4h 07mUnited Airlines

Deal found 6/30

$336

Fri 7/187:52 pmGRB - STL

1 stop13h 19mFrontier

Sun 7/207:54 pmSTL - GRB

2 stops23h 01mFrontier

Deal found 6/29

$424

Thu 7/246:19 pmGRB - STL

1 stop5h 32mAmerican Airlines

Mon 7/286:00 amSTL - GRB

1 stop3h 21mAmerican Airlines

Deal found 6/29

$249

One-way flights from Green Bay to St. Louis
Search for one-way flight options from Green Bay to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 1, 2025.

Sat 7/126:20 amGRB - STL

1 stop4h 13mDelta

Deal found 6/30

$300

Sat 7/123:00 pmGRB - STL

2 stops8h 59mAmerican Airlines

Deal found 6/30

$305

Cheapflights Fare Finder

Use the filters below to find and compare flights from Green Bay to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

Fri 8/15

6:26 pm-11:51 pm

1 stop5h 25m

Lambert-St Louis

Sat 8/23

6:00 am-9:12 am

1 stop3h 12m

$229

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

Tue 7/15

6:15 am-12:27 pm

1 stop6h 12m

Lambert-St Louis

Sat 7/19

5:30 pm-9:37 pm

1 stop4h 07m

$336

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

Sat 7/12

6:20 am-10:33 am

1 stop4h 13m

$300

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

Sat 7/12

3:00 pm-11:59 pm

2 stops8h 59m

$305

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Best time to book a flight from Green Bay to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Green Bay with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Green Bay to St. Louis

What is the cheapest month to book a flight from Green Bay to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Green Bay to St. Louis (average of $311). Flying from Green Bay to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from GRB to STL?

It’s typically best to fly out from Green Bay to St. Louis in the afternoon. Doing so could potentially save you 37% on the flight price compared to flying in the morning, which is usually more expensive.

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Green Bay to St. Louis, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,973 reviews

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,858 reviews

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.9

Fair

3,291 reviews

Delta

8.0

Very good

7,973 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Green Bay to St. Louis round-trip?
Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $229. Additional round-trip tickets that might be worth considering are offered by United Airlines and Frontier, with the lowest prices starting at $336 and $424, respectively. American Airlines is currently priced 31% below the average price you’ll pay for this route.
Can I find deals for flights from Green Bay to St. Louis that include hotel bookings?
Yes. In addition to deals on Green Bay to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Green Bay to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Green Bay to St. Louis.
Can I find deals for business class flights from Green Bay to St. Louis?
Yes. Cheapflights offers flight deals from Green Bay to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Green Bay to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Green Bay to St. Louis (average of $311). Flying from Green Bay to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

O'Fallon

Maryland Heights

Fairview Heights

Collinsville

Eureka

St. Peters

Glencoe

Alton

Festus

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Farmington

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Top 3 airlines flying from Green Bay to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$199	Average$383	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$218	Average$281	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$322	Average$438	FlexibilityNo cancel fee	On-time69%

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$229+ Cheap flights from Green Bay to St. Louis (GRB - STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Green Bay to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Green Bay to St. Louis

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Green Bay to St. Louis

Cheapest flights from Green Bay to St. LouisExplore the most affordable flight options available from Green Bay to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Explore the most affordable flight options available from Green Bay to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Green Bay to St. Louis that are best for you.

Best time to book a flight from Green Bay to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Green Bay with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Green Bay to St. Louis

What is the cheapest month to book a flight from Green Bay to St. Louis?

What is the cheapest time of day to fly from GRB to STL?

Find hourly flight availability from Green Bay to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 1, 2025.

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Green Bay to St. Louis, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Green Bay to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from Green Bay to St. Louis round-trip?

Can I find deals for flights from Green Bay to St. Louis that include hotel bookings?

How can I find direct flights from Green Bay to St. Louis?

Can I find deals for business class flights from Green Bay to St. Louis?

What is the cheapest month to book a flight from Green Bay to St. Louis?

Traveling to a place near Green Bay?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Green Bay to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Green Bay to St. Louis

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Cheapest flights from Green Bay to St. Louis
Explore the most affordable flight options available from Green Bay to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.