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$91+ Cheap flights from North Dakota 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
FAR — ORD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from North Dakota to Illinois

Keep the following information in mind while searching for North Dakota to Illinois flight deals. Data was last updated July 3, 2025.

Round-trip from

$161
(Priceline)

One-way from

$91
(Priceline)

Popular in

November

Cheapest in

January

Average price

$329

Good round-trip deal

$303 or less

Good one-way deal

$269 or less
From North Dakota to Illinois
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One-way flight from North Dakota to Illinois
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Highest demand for flights based on searches. 2% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from North Dakota to Illinois.
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Price to beat on a one-way flight from North Dakota to Illinois.
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Find flight deals from North Dakota to Illinois

Cheapest flights from North Dakota to Illinois
Explore the most affordable flight options available from North Dakota to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/92:32 pmFAR - ORD
1 stop9h 21mFrontier
Mon 10/136:00 amORD - FAR
1 stop7h 46mFrontier
Deal found 7/2$161
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Fri 8/225:25 pmFAR - ORD
Nonstop1h 59mAmerican Airlines
Sun 8/249:50 amORD - FAR
Nonstop2h 01mAmerican Airlines
Deal found 7/1$209
This Delta deal was found by Cheapflights users on 7/1. 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 8/212:16 pmBIS - ORD
1 stop4h 34mDelta
Wed 8/138:25 amORD - BIS
1 stop4h 09mDelta
Deal found 7/1$219
This American Airlines deal was found by Cheapflights users on 7/1. 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 7/2912:39 pmBIS - ORD
Nonstop2h 14mAmerican Airlines
Tue 8/59:45 amORD - BIS
Nonstop2h 24mAmerican Airlines
Deal found 7/1$223
This United Airlines deal was found by Cheapflights users on 7/3. 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 10/313:53 pmFAR - ORD
Nonstop2h 12mUnited Airlines
Sun 11/28:50 amORD - FAR
Nonstop2h 15mUnited Airlines
Deal found 7/3$229
This Delta deal was found by Cheapflights users on 7/2. 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 9/207:00 amFAR - MDW
1 stop6h 03mDelta
Tue 9/231:43 pmMDW - FAR
1 stop4h 16mDelta
Deal found 7/2$229
This Delta deal was found by Cheapflights users on 7/2. 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.
Sun 9/145:00 amFAR - ORD
1 stop3h 25mDelta
Sat 9/202:25 pmORD - FAR
2 stops9h 22mDelta
Deal found 7/2$234
This Delta deal was found by Cheapflights users on 7/2. 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 8/165:36 pmMOT - ORD
1 stop3h 58mDelta
Wed 8/206:10 amORD - MOT
1 stop5h 45mDelta
Deal found 7/2$238
This Delta deal was found by Cheapflights users on 7/2. 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 8/1612:35 pmMOT - MDW
1 stop5h 02mDelta
Wed 8/201:43 pmMDW - MOT
1 stop6h 24mDelta
Deal found 7/2$238
This Delta deal was found by Cheapflights users on 7/1. 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 7/291:17 pmBIS - MDW
1 stop4h 22mDelta
Tue 8/57:21 pmMDW - BIS
1 stop3h 59mDelta
Deal found 7/1$243
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/92:32 pmFAR - MDW
1 stop8h 06mFrontier
Mon 10/134:29 pmMDW - FAR
1 stop22h 22mFrontier
Deal found 7/2$247
This Delta deal was found by Cheapflights users on 7/1. 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 10/111:23 amBIS - STL
1 stop5h 22mDelta
Sat 10/45:05 pmSTL - BIS
1 stop6h 22mDelta
Deal found 7/1$249

Cheapflights Fare Finder

Customize your flight search to find flights from North Dakota 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 July 3, 2025.
Use the filters below to find and compare flights from North Dakota to Illinois that are best for you.

Fly from

North Dakota

Fly to

Illinois

Route

Depart

Return

Price

FargoChicago

FAR - ORD

FARORD

Fargo Hector Field

Thu 10/9

2:32 pm-11:53 pm

1 stop9h 21m

Chicago O'Hare Intl

Mon 10/13

6:00 am-1:46 pm

1 stop7h 46m

$161

FargoChicago

FAR - ORD

FARORD

Fargo Hector Field

Fri 8/22

5:25 pm-7:24 pm

Nonstop1h 59m

Chicago O'Hare Intl

Sun 8/24

9:50 am-11:51 am

Nonstop2h 01m

$209

BismarckChicago

BIS - ORD

BISORD

Bismarck

Sat 8/2

12:16 pm-4:50 pm

1 stop4h 34m

Chicago O'Hare Intl

Wed 8/13

8:25 am-12:34 pm

1 stop4h 09m

$219

BismarckChicago

BIS - ORD

BISORD

Bismarck

Tue 7/29

12:39 pm-2:53 pm

Nonstop2h 14m

Chicago O'Hare Intl

Tue 8/5

9:45 am-12:09 pm

Nonstop2h 24m

$223

FargoChicago

FAR - ORD

FARORD

Fargo Hector Field

Fri 10/31

3:53 pm-6:05 pm

Nonstop2h 12m

Chicago O'Hare Intl

Sun 11/2

8:50 am-11:05 am

Nonstop2h 15m

$229

FargoChicago

FAR - MDW

FARMDW

Fargo Hector Field

Sat 9/20

7:00 am-1:03 pm

1 stop6h 03m

Chicago Midway

Tue 9/23

1:43 pm-5:59 pm

1 stop4h 16m

$229

FargoChicago

FAR - ORD

FARORD

Fargo Hector Field

Sun 9/14

5:00 am-8:25 am

1 stop3h 25m

Chicago O'Hare Intl

Sat 9/20

2:25 pm-11:47 pm

2 stops9h 22m

$234

MinotChicago

MOT - ORD

MOTORD

Minot

Sat 8/16

5:36 pm-9:34 pm

1 stop3h 58m

Chicago O'Hare Intl

Wed 8/20

6:10 am-11:55 am

1 stop5h 45m

$238

MinotChicago

MOT - MDW

MOTMDW

Minot

Sat 8/16

12:35 pm-5:37 pm

1 stop5h 02m

Chicago Midway

Wed 8/20

1:43 pm-8:07 pm

1 stop6h 24m

$238

BismarckChicago

BIS - MDW

BISMDW

Bismarck

Tue 7/29

1:17 pm-5:39 pm

1 stop4h 22m

Chicago Midway

Tue 8/5

7:21 pm-11:20 pm

1 stop3h 59m

$243

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 45 results
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Best time to book a flight from North Dakota to Illinois

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

What is the cheapest month to book a flight from North Dakota to Illinois?

Currently, August is the cheapest month in which you can book a flight from North Dakota to Illinois (average of $245). Flying from North Dakota 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 ND to IL?

Find hourly flight availability from North Dakota 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 July 3, 2025.

When flying from North Dakota to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from North Dakota to Illinois

Explore weekly flight availability from North Dakota 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 July 3, 2025.

The most flights from USND to USIL are scheduled on a Thursday (22 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 on average).

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 July 3, 2025.
Read through reviews of airlines operating flights from North Dakota to Illinois, such as Delta, United Airlines, and Allegiant Air. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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!
Allegiant Air
7.3
Good
708 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
3,286 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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 North Dakota to Illinois. 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 to fly from North Dakota to Illinois one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $91. However, be on the lookout for offers from Delta and American Airlines, as they are both options that can get you from North Dakota to Illinois for a low price.

  • Can I find deals for flights from North Dakota to Illinois that include hotel bookings?

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

  • How can I find direct flights from North Dakota to Illinois?

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

  • Can I find deals for business class flights from North Dakota to Illinois?

    Yes. Cheapflights offers flight deals from North Dakota 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 North Dakota to Illinois?

    Currently, August is the cheapest month in which you can book a flight from North Dakota to Illinois (average of $245). Flying from North Dakota 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 North Dakota to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from North Dakota to Illinois

Discover the top 3 airlines that operate flights from North Dakota 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$209Average$368FlexibilityNo cancel feeOn-time71%
DeltaCheapest$218Average$462FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$229Average$347FlexibilityNo cancel feeOn-time69%

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