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$427+ Cheap flights from Grand Forks (GFK) 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 7/23. Fares are subject to change and may not be available on all flights or dates of travel.
GFK — ORD
Apr 24 — May 11
Fri 4/24
Fri 5/1
1 adult, Economy
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Cheap flight deals from Grand Forks to Illinois

Cheapest flights from Grand Forks to Illinois
Explore the most affordable flight options available from Grand Forks to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2026.

This Delta deal was found by Cheapflights users on 3/24. 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.
Thu 7/235:00 am
GFK
-
ORD
1 stop3h 30m
Delta
Sun 7/266:30 am
ORD
-
GFK
1 stop3h 45m
Delta
Deal found 3/24$427
This Delta deal was found by Cheapflights users on 3/23. 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.
Tue 4/712:15 pm
GFK
-
MDW
1 stop6h 25m
Delta
Sat 4/117:20 pm
MDW
-
GFK
1 stop3h 50m
Delta
Deal found 3/23$429
This Delta deal was found by Cheapflights users on 3/24. 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 5/207:15 pm
GFK
-
STL
1 stop4h 06m
Delta
Wed 5/275:36 pm
STL
-
GFK
1 stop5h 27m
Delta
Deal found 3/24$453
This Delta deal was found by Cheapflights users on 3/21. 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.
Fri 4/173:55 pm
GFK
-
ORD
1 stop5h 43m
Delta
Sun 4/197:09 pm
ORD
-
GFK
1 stop3h 55m
Delta
Deal found 3/21$482
This Delta deal was found by Cheapflights users on 3/23. 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.
Tue 4/74:30 pm
GFK
-
ORD
1 stop4h 56m
Delta
Sat 4/116:35 pm
ORD
-
GFK
1 stop4h 35m
Delta
Deal found 3/23$544
This Delta deal was found by Cheapflights users on 3/24. 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.
Tue 7/77:15 pm
GFK
-
STL
1 stop4h 07m
Delta
Sat 7/116:21 am
STL
-
GFK
1 stop3h 54m
Delta
Deal found 3/24$546
This Delta deal was found by Cheapflights users on 3/22. 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 7/255:00 am
GFK
-
ORD
1 stop3h 30m
Delta
Sun 7/266:30 am
ORD
-
GFK
1 stop3h 45m
Delta
Deal found 3/22$562
This Delta deal was found by Cheapflights users on 3/21. 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.
Fri 8/2810:45 am
GFK
-
ORD
2 stops7h 56m
Delta
Sun 8/306:00 am
ORD
-
GFK
1 stop4h 10m
Delta
Deal found 3/21$567
This Delta deal was found by Cheapflights users on 3/24. 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.
Thu 7/235:00 am
GFK
-
MDW
1 stop3h 37m
Delta
Sun 7/267:06 pm
MDW
-
GFK
1 stop4h 00m
Delta
Deal found 3/24$616
This Delta deal was found by Cheapflights users on 3/21. 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.
Fri 8/2810:45 am
GFK
-
MDW
2 stops7h 46m
Delta
Sun 8/309:20 am
MDW
-
GFK
1 stop5h 00m
Delta
Deal found 3/21$626
This Delta deal was found by Cheapflights users on 3/24. 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 4/85:00 am
GFK
-
ORD
1 stop3h 40m
Delta
Sun 4/126:15 am
ORD
-
GFK
1 stop5h 20m
Delta
Deal found 3/24$634
This Delta deal was found by Cheapflights users on 3/24. 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.
Mon 4/203:55 pm
GFK
-
ORD
1 stop5h 43m
Delta
Fri 4/246:25 am
ORD
-
GFK
1 stop3h 50m
Delta
Deal found 3/24$637

Find flight deals from Grand Forks to Illinois

Keep the following information in mind while searching for Grand Forks to Illinois flight deals. Data was last updated March 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$427
(Delta)
Provider with most accurate pricing for Grand Forks-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Grand Forks-Chicago (CHI) flights.
Search Deals
From Grand Forks to Illinois
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Grand Forks 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 March 25, 2026.
Use the filters below to find and compare flights from Grand Forks to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Grand ForksChicago

GFK - ORD

GFKORD

Grand Forks

Fri 8/28

3:55 pm-9:34 pm

1 stop5h 39m

Chicago O'Hare Intl

Sun 8/30

6:00 am-10:10 am

1 stop4h 10m

$427
Quickest round-trip

Grand ForksChicago

GFK - ORD

GFKORD

Grand Forks

Thu 7/23

5:00 am-8:30 am

1 stop3h 30m

Chicago O'Hare Intl

Sun 7/26

6:30 am-10:15 am

1 stop3h 45m

$427

Grand ForksChicago

GFK - MDW

GFKMDW

Grand Forks

Tue 4/7

12:15 pm-6:40 pm

1 stop6h 25m

Chicago Midway

Sat 4/11

7:20 pm-11:10 pm

1 stop3h 50m

$429

Grand ForksSt. Louis

GFK - STL

GFKSTL

Grand Forks

Wed 5/20

7:15 pm-11:21 pm

1 stop4h 06m

Lambert-St Louis

Wed 5/27

5:36 pm-11:03 pm

1 stop5h 27m

$453

Grand ForksSt. Louis

GFK - STL

GFKSTL

Grand Forks

Tue 7/7

7:15 pm-11:22 pm

1 stop4h 07m

Lambert-St Louis

Sat 7/11

6:21 am-10:15 am

1 stop3h 54m

$546

Grand ForksChicago

GFK - ORD

GFKORD

Grand Forks

Sat 7/25

5:00 am-8:30 am

1 stop3h 30m

Chicago O'Hare Intl

Sun 7/26

6:30 am-10:15 am

1 stop3h 45m

$562

Grand ForksChicago

GFK - MDW

GFKMDW

Grand Forks

Thu 7/23

5:00 am-8:37 am

1 stop3h 37m

Chicago Midway

Sun 7/26

7:06 pm-11:06 pm

1 stop4h 00m

$616

Grand ForksChicago

GFK - MDW

GFKMDW

Grand Forks

Fri 8/28

10:45 am-6:31 pm

2 stops7h 46m

Chicago Midway

Sun 8/30

9:20 am-2:20 pm

1 stop5h 00m

$626

Grand ForksSt. Louis

GFK - STL

GFKSTL

Grand Forks

Mon 7/6

10:50 am-4:52 pm

1 stop6h 02m

Lambert-St Louis

Fri 7/10

5:42 pm-11:06 pm

1 stop5h 24m

$765

Grand ForksChicago

GFK - ORD

GFKORD

Grand Forks

Tue 4/7

4:30 pm-9:26 pm

1 stop4h 56m

Chicago O'Hare Intl

Wed 4/8

6:15 am-11:35 am

1 stop5h 20m

$775

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/22

Showing 1-10 of 18 resultsSorted by cheapest first
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Best time to book a flight from Grand Forks to Illinois

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

What is the cheapest month to book a flight from Grand Forks to Illinois?

Currently, January is the cheapest month in which you can book a flight from Grand Forks to Illinois (average of $209). Flying from Grand Forks to Illinois in May is currently the most expensive (average of $250). 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.

Related info for your journey

Find useful and relevant information for your journey from Grand Forks 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 Grand Forks to Illinois?

    Located just 6.8 mi from the city center, Grand Forks (GFK) is the airport most travelers will use when flying to Illinois from Grand Forks.

  • How long is the flight from Grand Forks to Illinois?

    Delta can get you from Grand Forks to Illinois in just under 5h 39m. Your travel time can differ by up to . There are 612 mi between Grand Forks and Illinois.

  • What are the most popular routes from Grand Forks to Illinois?

    Most travelers choose Grand Forks - Chicago O'Hare Intl, Grand Forks - Lambert-St Louis or Grand Forks - Chicago Midway when deciding on the best route from Grand Forks to Illinois.

  • Can I find deals for flights from Grand Forks to Illinois that include hotel bookings?

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

  • How can I find direct flights from Grand Forks to Illinois?

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

  • Can I find deals for business class flights from Grand Forks to Illinois?

    Yes. Cheapflights offers flight deals from Grand Forks 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 Grand Forks to Illinois?

    Currently, January is the cheapest month in which you can book a flight from Grand Forks to Illinois (average of $209). Flying from Grand Forks to Illinois in May is currently the most expensive (average of $250). 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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