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$179+ Cheap flights from Green Bay (GRB) to Illinois

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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — ORD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap flight deals from Green Bay to Illinois

Keep the following information in mind while searching for Green Bay to Illinois flight deals. Data was last updated junio 12, 2025.

Round-trip from

$179
(American Airlines)

Popular in

September

Cheapest in

April

Average price

$277

Good round-trip deal

$352 or less

Good one-way deal

$223 or less
From Green Bay Austin-Straubel to Illinois
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Highest demand for flights based on searches. 14% potential increase in price ($51 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Green Bay Austin-Straubel to Illinois.
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Price to beat on a one-way flight from Green Bay Austin-Straubel to Illinois.
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Find flight deals from Green Bay to Illinois

Cheapest flights from Green Bay to Illinois
Explore the most affordable flight options available from Green Bay to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/36:00 amGRB - ORD
Nonstop1h 09mAmerican Airlines
dom. 7/68:19 amORD - GRB
Nonstop1h 02mAmerican Airlines
Deal found 6/11$179
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/274:24 pmGRB - ORD
1 stop5h 13mDelta
mié. 7/92:00 pmORD - GRB
1 stop6h 35mDelta
Deal found 6/11$204
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/106:19 pmGRB - STL
1 stop5h 32mAmerican Airlines
jue. 7/176:00 amSTL - GRB
1 stop3h 21mAmerican Airlines
Deal found 6/10$249
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/251:10 pmGRB - ORD
Nonstop1h 18mUnited Airlines
dom. 6/298:20 pmORD - GRB
Nonstop1h 18mUnited Airlines
Deal found 6/9$259
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/236:20 amGRB - STL
1 stop4h 13mDelta
lun. 7/285:37 pmSTL - GRB
1 stop4h 26mDelta
Deal found 6/10$294
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/178:00 amGRB - STL
1 stop4h 27mUnited Airlines
lun. 7/215:30 pmSTL - GRB
1 stop4h 07mUnited Airlines
Deal found 6/10$358
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/1112:10 pmGRB - MDW
1 stop5h 30mDelta
sáb. 6/149:21 amMDW - GRB
1 stop6h 23mDelta
Deal found 6/10$358

Cheapflights Fare Finder

Customize your flight search to find flights from Green Bay to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
Use the filters below to find and compare flights from Green Bay to Illinois that are best for you.

Fly from

Green Bay

Fly to

Illinois

Route

Depart

Return

Price

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

jue. 7/3

6:00 am-7:09 am

Nonstop1h 09m

Chicago O'Hare Intl

dom. 7/6

8:19 am-9:21 am

Nonstop1h 02m

$179

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

vie. 6/27

4:24 pm-9:37 pm

1 stop5h 13m

Chicago O'Hare Intl

mié. 7/9

2:00 pm-8:35 pm

1 stop6h 35m

$204

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

jue. 7/10

6:19 pm-11:51 pm

1 stop5h 32m

Lambert-St Louis

jue. 7/17

6:00 am-9:21 am

1 stop3h 21m

$249

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

mié. 6/25

1:10 pm-2:28 pm

Nonstop1h 18m

Chicago O'Hare Intl

dom. 6/29

8:20 pm-9:38 pm

Nonstop1h 18m

$259

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

mié. 7/23

6:20 am-10:33 am

1 stop4h 13m

Lambert-St Louis

lun. 7/28

5:37 pm-10:03 pm

1 stop4h 26m

$294

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

jue. 7/17

8:00 am-12:27 pm

1 stop4h 27m

Lambert-St Louis

lun. 7/21

5:30 pm-9:37 pm

1 stop4h 07m

$358

Green BayChicago

GRB - MDW

GRBMDW

Green Bay Austin-Straubel

mié. 6/25

6:20 am-1:06 pm

1 stop6h 46m

Chicago Midway

sáb. 7/5

1:09 pm-4:23 pm

1 stop3h 14m

$414

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

sáb. 7/12

6:20 am-10:33 am

1 stop4h 13m

$180

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

vie. 7/25

7:52 pm-9:11 am

1 stop13h 19m

$184

Green BaySt. Louis

GRB - STL

GRBSTL

Green Bay Austin-Straubel

sáb. 7/12

6:15 am-2:23 pm

2 stops8h 08m

$185

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 14 results
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Best time to book a flight from Green Bay to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois 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 Illinois

What is the cheapest month to book a flight from Green Bay to Illinois?

Currently, August is the cheapest month in which you can book a flight from Green Bay to Illinois (average of $245). Flying from Green Bay to Illinois in March is currently the most expensive (average of $321). 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 IL?

Find hourly flight availability from Green Bay to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Green Bay to Illinois as you normally would.

Weekly flight availability from Green Bay to Illinois

Explore weekly flight availability from Green Bay to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated junio 12, 2025.

The most flights from GRB to USIL are scheduled on a Wednesday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated junio 12, 2025.
Read through reviews of airlines operating flights from Green Bay to Illinois, such as Delta, United Airlines and American Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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
3,295 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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

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

  • What airport do you fly from for flights from Green Bay to Illinois?

    Green Bay Austin-Straubel (GRB) is the airport you will fly out of if you book a flight from Green Bay to Illinois. It is only a 5.9 mi journey to Austin-Straubel (GRB) from Green Bay’s city center.

  • What are the cheapest airlines to fly from Green Bay to Illinois one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $180. Users have also found prices from $184 and $185 on Frontier and American Airlines, respectively.

  • What are the most popular routes from Green Bay to Illinois?

    The most popular route from Green Bay to Illinois is Green Bay Austin-Straubel - Chicago O'Hare Intl. You may also consider Green Bay Austin-Straubel - Lambert-St Louis or Green Bay Austin-Straubel - Chicago Midway.

  • What are the most reliable airlines from Green Bay to Illinois?

    Before booking your flight to Illinois from Green Bay, check out the most reliable airlines to get you to your destination on time: Qatar Airways (93%), Envoy Air (86%), Air New Zealand( 83%).

  • What are the cheapest flights from Green Bay to Illinois?

    Looking at all options, your cheapest flight can be booked for $143. While the most popular route (Green Bay Austin-Straubel - Chicago O'Hare Intl) can be booked for $179 on average our data indicates $2,082 when flying from Green Bay to Illinois.

  • Can I find deals for flights from Green Bay to Illinois that include hotel bookings?

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

  • How can I find direct flights from Green Bay to Illinois?

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

  • Can I find deals for business class flights from Green Bay to Illinois?

    Yes. Cheapflights offers flight deals from Green Bay to Illinois 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 Illinois?

    Currently, August is the cheapest month in which you can book a flight from Green Bay to Illinois (average of $245). Flying from Green Bay to Illinois in March is currently the most expensive (average of $321). 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

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Alternative routes for Green Bay to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Green Bay to Illinois

Discover the top 2 airlines that operate flights from Green Bay to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$208Average$280FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$217Average$306FlexibilityNo cancel feeOn-time69%

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