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$124+ Cheap flights from Green Bay (GRB) to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — ORD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$179
(American Airlines)

One-way from

$124
(American Airlines)

Popular in

August

Cheapest in

April

Average price

$347

Good round-trip deal

$373 or less

Good one-way deal

$213 or less
From Green Bay Austin-Straubel to Illinois
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One-way flight from Green Bay Austin-Straubel to Illinois
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Highest demand for flights based on searches. 30% potential increase in price ($141 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 10/168:08 pmGRB - ORD
Nonstop1h 20mAmerican Airlines
Sun 10/198:10 amORD - GRB
Nonstop1h 04mAmerican Airlines
Deal found 9/10$179
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 9/252:40 pmGRB - ORD
Nonstop1h 20mUnited Airlines
Mon 9/2911:30 amORD - GRB
Nonstop1h 14mUnited Airlines
Deal found 9/10$189
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 9/234:35 pmGRB - ORD
Nonstop1h 21mAmerican Airlines
Tue 9/308:05 amORD - GRB
Nonstop1h 11mAmerican Airlines
Deal found 9/10$199
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 10/114:16 pmGRB - ORD
1 stop5h 03mDelta
Mon 10/136:08 amORD - GRB
1 stop3h 58mDelta
Deal found 9/10$214
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Wed 12/311:06 amGRB - ORD
Nonstop1h 23mAmerican Airlines
Sun 12/77:19 pmORD - GRB
Nonstop1h 10mAmerican Airlines
Deal found 9/11$224
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 9/245:30 pmGRB - STL
1 stop5h 05mUnited Airlines
Sun 9/288:00 amSTL - GRB
1 stop4h 44mUnited Airlines
Deal found 9/9$239
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/42:40 pmGRB - ORD
Nonstop1h 20mUnited Airlines
Sun 10/59:25 pmORD - GRB
Nonstop1h 15mUnited Airlines
Deal found 9/10$239
This Delta deal was found by Cheapflights users on 9/10. 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.
Wed 10/2211:06 amGRB - ORD
1 stop5h 05mDelta
Sat 10/256:08 amORD - GRB
1 stop5h 14mDelta
Deal found 9/10$247
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:35 pmGRB - ORD
Nonstop1h 20mUnited Airlines
Tue 9/309:25 pmORD - GRB
Nonstop1h 15mUnited Airlines
Deal found 9/11$249
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Fri 12/266:15 amGRB - ORD
Nonstop1h 33mUnited Airlines
Sat 1/36:35 pmORD - GRB
Nonstop1h 25mUnited Airlines
Deal found 9/9$254
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Sun 12/72:55 pmGRB - ORD
Nonstop1h 24mAmerican Airlines
Sun 12/148:05 amORD - GRB
Nonstop1h 08mAmerican Airlines
Deal found 9/10$269
This Delta deal was found by Cheapflights users on 9/10. 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.
Wed 10/2212:02 pmGRB - MDW
1 stop5h 41mDelta
Sat 10/253:00 pmMDW - GRB
1 stop6h 24mDelta
Deal found 9/10$359

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 September 11, 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

Thu 10/16

8:08 pm-9:28 pm

Nonstop1h 20m

Chicago O'Hare Intl

Sun 10/19

8:10 am-9:14 am

Nonstop1h 04m

$179

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

Wed 10/22

8:08 pm-9:28 pm

Nonstop1h 20m

Chicago O'Hare Intl

Sat 10/25

8:10 am-9:14 am

Nonstop1h 04m

$179

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

Wed 10/8

6:00 am-7:18 am

Nonstop1h 18m

Chicago O'Hare Intl

Wed 10/15

8:10 am-9:14 am

Nonstop1h 04m

$179

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

Thu 10/9

3:02 pm-4:23 pm

Nonstop1h 21m

Chicago O'Hare Intl

Thu 10/16

8:10 am-9:14 am

Nonstop1h 04m

$179

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

Sat 10/11

3:02 pm-4:23 pm

Nonstop1h 21m

Chicago O'Hare Intl

Mon 10/13

8:10 am-9:14 am

Nonstop1h 04m

$179

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

Thu 9/25

2:40 pm-4:00 pm

Nonstop1h 20m

Chicago O'Hare Intl

Mon 9/29

11:30 am-12:44 pm

Nonstop1h 14m

$189

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

Fri 9/26

2:40 pm-4:00 pm

Nonstop1h 20m

Chicago O'Hare Intl

Sun 9/28

8:50 am-10:05 am

Nonstop1h 15m

$189

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

Fri 12/26

6:40 am-11:48 am

1 stop5h 08m

Chicago O'Hare Intl

Sat 1/3

9:41 am-3:39 pm

1 stop5h 58m

$199

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

Tue 9/23

4:35 pm-5:56 pm

Nonstop1h 21m

Chicago O'Hare Intl

Tue 9/30

8:05 am-9:16 am

Nonstop1h 11m

$199

Green BayChicago

GRB - ORD

GRBORD

Green Bay Austin-Straubel

Sat 10/11

4:16 pm-9:19 pm

1 stop5h 03m

Chicago O'Hare Intl

Mon 10/13

6:08 am-10:06 am

1 stop3h 58m

$214

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 41 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 September 11, 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 September 11, 2025.

The most flights from GRB to USIL are scheduled on a Thursday (21 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (15 on average).

How much does it cost to fly round-trip from Green Bay to Illinois?

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 September 11, 2025.
Read reviews from past customers who have flown United Airlines and American Airlines from Green Bay to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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.

  • How long is the flight from Green Bay to Illinois?

    For as low as $179, American Airlines can have you in Illinois from Green Bay in 1h 20m. Green Bay and Illinois are separated by a distance of 173 mi. This flight may include one or multiple stops.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $186. Users have also found prices from $204 and $230 on American Airlines and Delta, 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 - Chicago Midway or Green Bay Austin-Straubel - Lambert-St Louis.

  • 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: Republic Airways (100%), Copa Airlines (82%), Air New Zealand( 79%).

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

    Looking at all options, your cheapest flight can be booked for $158. While the most popular route (Green Bay Austin-Straubel - Chicago O'Hare Intl) can be booked for $179 on average, our data indicates $906 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$189Average$267FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$217Average$318FlexibilityNo cancel feeOn-time69%

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