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$133+ Cheap flights from Bismarck (BIS) 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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — ORD
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Bismarck to Illinois

Keep the following information in mind while searching for Bismarck to Illinois flight deals. Data was last updated September 16, 2025.

Round-trip from

$247
(American Airlines)

One-way from

$133
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$319

Good round-trip deal

$334 or less

Good one-way deal

$306 or less
From Bismarck to Illinois
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One-way flight from Bismarck to Illinois
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Highest demand for flights based on searches. 22% potential increase in price ($92 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($18 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 Bismarck to Illinois.
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Price to beat on a one-way flight from Bismarck to Illinois.
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Find flight deals from Bismarck to Illinois

Cheapest flights from Bismarck to Illinois
Explore the most affordable flight options available from Bismarck to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This American Airlines deal was found by Cheapflights users on 9/14. 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 9/3012:51 pmBIS - ORD
Nonstop2h 18mAmerican Airlines
Sat 10/410:38 amORD - BIS
Nonstop2h 40mAmerican Airlines
Deal found 9/14$247
This American Airlines deal was found by Cheapflights users on 9/16. 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 9/2312:51 pmBIS - ORD
Nonstop2h 18mAmerican Airlines
Tue 9/303:08 pmORD - BIS
1 stop7h 18mAmerican Airlines
Deal found 9/16$257
This Delta deal was found by Cheapflights users on 9/15. 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 9/305:00 amBIS - STL
1 stop6h 30mDelta
Sat 10/46:00 amSTL - BIS
1 stop5h 35mDelta
Deal found 9/15$259
This Delta deal was found by Cheapflights users on 9/14. 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 9/305:00 amBIS - ORD
1 stop7h 00mDelta
Sat 10/48:50 amORD - BIS
1 stop6h 00mDelta
Deal found 9/14$267
This Delta deal was found by Cheapflights users on 9/14. 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 9/305:00 amBIS - MDW
2 stops7h 28mDelta
Sat 10/47:15 pmMDW - BIS
1 stop4h 07mDelta
Deal found 9/14$272
This American Airlines deal was found by Cheapflights users on 9/14. 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 9/241:32 pmBIS - ORD
Nonstop2h 18mAmerican Airlines
Thu 10/910:33 amORD - BIS
Nonstop2h 24mAmerican Airlines
Deal found 9/14$283
This American Airlines deal was found by Cheapflights users on 9/14. 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 11/2812:55 pmBIS - ORD
Nonstop2h 32mAmerican Airlines
Fri 1/165:00 amORD - BIS
1 stop7h 47mAmerican Airlines
Deal found 9/14$300
This Delta deal was found by Cheapflights users on 9/16. 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 10/201:14 pmBIS - ORD
1 stop6h 29mDelta
Mon 10/273:50 pmORD - BIS
1 stop3h 47mDelta
Deal found 9/16$310
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/51:48 pmBIS - ORD
Nonstop2h 18mAmerican Airlines
Sun 10/1210:33 amORD - BIS
Nonstop2h 24mAmerican Airlines
Deal found 9/14$319
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/186:00 amBIS - STL
1 stop6h 43mUnited Airlines
Sun 9/215:15 amSTL - BIS
1 stop5h 20mUnited Airlines
Deal found 9/14$324
This American Airlines deal was found by Cheapflights users on 9/15. 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 9/306:19 amBIS - STL
2 stops12h 13mAmerican Airlines
Sat 10/46:10 amSTL - BIS
1 stop7h 08mAmerican Airlines
Deal found 9/15$332
This Delta deal was found by Cheapflights users on 9/14. 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 11/286:00 amBIS - ORD
2 stops8h 05mDelta
Fri 1/163:50 pmORD - BIS
1 stop4h 07mDelta
Deal found 9/14$344

Cheapflights Fare Finder

 
Customize your flight search to find flights from Bismarck 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 16, 2025.
Use the filters below to find and compare flights from Bismarck to Illinois that are best for you.

Fly from

Bismarck

Fly to

Illinois

Route

Depart

Return

Price

BismarckChicago

BIS - ORD

BISORD

Bismarck

Tue 9/30

12:51 pm-3:09 pm

Nonstop2h 18m

Chicago O'Hare Intl

Sat 10/4

10:38 am-1:18 pm

Nonstop2h 40m

$247

BismarckSt. Louis

BIS - STL

BISSTL

Bismarck

Tue 9/30

5:00 am-11:30 am

1 stop6h 30m

Lambert-St Louis

Sat 10/4

6:00 am-11:35 am

1 stop5h 35m

$259

BismarckChicago

BIS - ORD

BISORD

Bismarck

Tue 9/30

5:00 am-12:00 pm

1 stop7h 00m

Chicago O'Hare Intl

Sat 10/4

8:50 am-2:50 pm

1 stop6h 00m

$267

BismarckChicago

BIS - ORD

BISORD

Bismarck

Fri 11/28

12:55 pm-3:27 pm

Nonstop2h 32m

Chicago O'Hare Intl

Fri 1/16

5:00 am-12:47 pm

1 stop7h 47m

$300

BismarckChicago

BIS - MDW

BISMDW

Bismarck

Sun 1/11

11:30 am-6:08 pm

1 stop6h 38m

Chicago Midway

Mon 1/19

2:00 pm-7:57 pm

1 stop5h 57m

$310

BismarckChicago

BIS - ORD

BISORD

Bismarck

Mon 10/20

1:14 pm-7:43 pm

1 stop6h 29m

Chicago O'Hare Intl

Mon 10/27

3:50 pm-7:37 pm

1 stop3h 47m

$310

BismarckChicago

BIS - ORD

BISORD

Bismarck

Sun 10/5

1:48 pm-4:06 pm

Nonstop2h 18m

Chicago O'Hare Intl

Sun 10/12

10:33 am-12:57 pm

Nonstop2h 24m

$319

BismarckChicago

BIS - MDW

BISMDW

Bismarck

Tue 9/30

5:00 am-12:28 pm

2 stops7h 28m

Chicago Midway

Sat 10/4

1:08 pm-7:51 pm

2 stops6h 43m

$323

BismarckSt. Louis

BIS - STL

BISSTL

Bismarck

Tue 9/30

6:19 am-6:32 pm

2 stops12h 13m

Lambert-St Louis

Sat 10/4

6:10 am-1:18 pm

1 stop7h 08m

$332

BismarckChicago

BIS - MDW

BISMDW

Bismarck

Sun 10/5

5:00 am-8:53 am

1 stop3h 53m

Chicago Midway

Sun 10/12

1:48 pm-7:37 pm

1 stop5h 49m

$359

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 31 results
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Best time to book a flight from Bismarck to Illinois

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

What is the cheapest time of day to fly from BIS to IL?

Find hourly flight availability from Bismarck 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 16, 2025.

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

How much does it cost to fly round-trip from Bismarck 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 16, 2025.
Peruse reviews from past customers who have flown with Delta and American Airlines from Bismarck to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

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
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

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
7,957 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

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 Bismarck 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 Bismarck to Illinois?

    Bismarck (BIS) is the airport you will fly out of if you book a flight from Bismarck to Illinois. It is only a 2.5 mi journey to Bismarck (BIS) from Bismarck’s city center.

  • How long is the flight from Bismarck to Illinois?

    There are many flights that can get you from Bismarck to Illinois in 2h 18m. Fly via American Airlines, Delta, or United Airlines to get the fastest option. There are 714 mi between Bismarck and Illinois. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Bismarck to Illinois?

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

  • What are the most reliable airlines from Bismarck to Illinois?

    Before booking your flight to Illinois from Bismarck, check out the most reliable airlines to get you to your destination on time: American Airlines (71%), Qatar Airways (71%), Envoy Air( 71%).

  • What are the cheapest flights from Bismarck to Illinois?

    Looking for the cheapest flight from Bismarck to Illinois? While on average our users pay $387, our data indicates the cheapest price to be $125. The most popular route (Bismarck - Chicago O'Hare Intl), is priced around $319.

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

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

  • How can I find direct flights from Bismarck to Illinois?

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

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

    Yes. Cheapflights offers flight deals from Bismarck 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 Bismarck to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Bismarck to Illinois (average of $245). Flying from Bismarck 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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Top 2 airlines flying from Bismarck to Illinois

Discover the top 2 airlines that operate flights from Bismarck 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$218Average$393FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$240Average$387FlexibilityNo cancel feeOn-time71%

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