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$61+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
FAR — ORD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$125
(Frontier)

One-way from

$61
(Frontier)

Popular in

March

Cheapest in

January

Average price

$368

Good round-trip deal

$404 or less

Good one-way deal

$267 or less
Provider with most accurate pricing for Fargo Hector Field-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Fargo Hector Field-Chicago (CHI) flights.
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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. 9% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Frontier deal was found by Cheapflights users on 2/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/95:41 pmFAR - MDW
1 stop6h 40mFrontier
Wed 4/166:45 amMDW - FAR
1 stop9h 56mFrontier
Deal found 2/19$100
This Frontier deal was found by Cheapflights users on 2/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/207:34 pmFAR - ORD
1 stop13h 21mFrontier
Wed 4/96:40 amORD - FAR
1 stop10h 01mFrontier
Deal found 2/19$125
This Delta deal was found by Cheapflights users on 2/19. 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 4/95:00 amBIS - ORD
1 stop3h 42mDelta
Sat 4/1210:20 amORD - BIS
1 stop4h 14mDelta
Deal found 2/19$199
This American Airlines deal was found by Cheapflights users on 2/20. 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 4/94:37 pmFAR - STL
1 stop5h 51mAmerican Airlines
Wed 4/167:35 amSTL - FAR
1 stop4h 16mAmerican Airlines
Deal found 2/20$199
This American Airlines deal was found by Cheapflights users on 2/19. 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 4/96:10 amBIS - ORD
2 stops9h 49mAmerican Airlines
Sat 4/1212:07 pmORD - BIS
2 stops10h 09mAmerican Airlines
Deal found 2/19$239
This American Airlines deal was found by Cheapflights users on 2/19. 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 5/912:24 pmFAR - PIA
1 stop4h 10mAmerican Airlines
Sun 5/115:05 pmPIA - FAR
1 stop5h 53mAmerican Airlines
Deal found 2/19$249
This United Airlines deal was found by Cheapflights users on 2/19. 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 4/52:20 pmFAR - ORD
Nonstop2h 04mUnited Airlines
Tue 4/81:15 pmORD - FAR
Nonstop2h 14mUnited Airlines
Deal found 2/19$255
This Delta deal was found by Cheapflights users on 2/19. 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 3/75:43 pmBIS - STL
1 stop4h 34mDelta
Mon 3/106:00 amSTL - BIS
1 stop4h 48mDelta
Deal found 2/19$259
This Delta deal was found by Cheapflights users on 2/18. 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 3/67:45 amBIS - MDW
1 stop4h 57mDelta
Mon 3/101:16 pmMDW - BIS
1 stop6h 44mDelta
Deal found 2/18$259
This American Airlines deal was found by Cheapflights users on 2/18. 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.
Sat 4/512:17 pmFAR - ORD
Nonstop1h 53mAmerican Airlines
Sat 4/126:00 amORD - FAR
1 stop6h 40mAmerican Airlines
Deal found 2/18$264
This Delta deal was found by Cheapflights users on 2/19. 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 4/191:15 pmFAR - ORD
1 stop4h 14mDelta
Tue 4/228:50 amORD - FAR
1 stop3h 32mDelta
Deal found 2/19$275
This Delta deal was found by Cheapflights users on 2/19. 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 6/75:00 amFAR - MDW
1 stop3h 39mDelta
Sat 6/146:45 pmMDW - FAR
1 stop5h 03mDelta
Deal found 2/19$275

Find flights from North Dakota to Illinois within your budget

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 February 20, 2025.

Fly from

North Dakota

Fly to

Illinois

Route

Depart

Return

Price

FargoChicago

FAR - MDW

FARMDW

Fargo Hector Field

Wed 4/9

5:41 pm-12:21 am

1 stop6h 40m

Chicago Midway

Wed 4/16

6:45 am-4:41 pm

1 stop9h 56m

$100

FargoChicago

FAR - ORD

FARORD

Fargo Hector Field

Thu 3/20

7:34 pm-8:55 am

1 stop13h 21m

Chicago O'Hare Intl

Wed 4/9

6:40 am-4:41 pm

1 stop10h 01m

$125

BismarckChicago

BIS - ORD

BISORD

Bismarck

Sat 3/22

3:20 pm-8:13 pm

1 stop4h 53m

Chicago O'Hare Intl

Sat 3/29

10:20 am-2:34 pm

1 stop4h 14m

$199

FargoSt. Louis

FAR - STL

FARSTL

Fargo Hector Field

Wed 4/9

4:37 pm-10:28 pm

1 stop5h 51m

Lambert-St Louis

Wed 4/16

7:35 am-11:51 am

1 stop4h 16m

$199

BismarckChicago

BIS - ORD

BISORD

Bismarck

Wed 4/9

6:10 am-3:59 pm

2 stops9h 49m

Chicago O'Hare Intl

Sat 4/12

12:07 pm-10:16 pm

2 stops10h 09m

$239

FargoPeoria

FAR - PIA

FARPIA

Fargo Hector Field

Fri 5/9

12:24 pm-4:34 pm

1 stop4h 10m

Greater Peoria

Sun 5/11

5:05 pm-10:58 pm

1 stop5h 53m

$249

FargoChicago

FAR - ORD

FARORD

Fargo Hector Field

Sat 4/5

2:20 pm-4:24 pm

Nonstop2h 04m

Chicago O'Hare Intl

Tue 4/8

1:15 pm-3:29 pm

Nonstop2h 14m

$255

BismarckSt. Louis

BIS - STL

BISSTL

Bismarck

Fri 3/7

5:43 pm-10:17 pm

1 stop4h 34m

Lambert-St Louis

Mon 3/10

6:00 am-10:48 am

1 stop4h 48m

$259

BismarckChicago

BIS - MDW

BISMDW

Bismarck

Thu 3/6

7:45 am-12:42 pm

1 stop4h 57m

Chicago Midway

Mon 3/10

1:16 pm-8:00 pm

1 stop6h 44m

$259

FargoChicago

FAR - ORD

FARORD

Fargo Hector Field

Sat 4/5

12:17 pm-2:10 pm

Nonstop1h 53m

Chicago O'Hare Intl

Sat 4/12

6:00 am-12:40 pm

1 stop6h 40m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 39 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.

Travel insights for flights from North Dakota to Illinois

Get recent, data-driven insights about flights from North Dakota to Illinois including ideal travel times, pricing trends, and more.

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 February 20, 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 February 20, 2025.

The most flights from USND to USIL are scheduled on a Thursday (20 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 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 February 20, 2025.
Get a feel of what it's like to fly with Delta, United Airlines and American Airlines from North Dakota to Illinois by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,219 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,765 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Frontier
6.0
Okay
3,355 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 $61. 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.

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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$225Average$341FlexibilityNo cancel feeOn-time69%
DeltaCheapest$247Average$421FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$259Average$376FlexibilityNo cancel feeOn-time71%
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