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$160+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — ORD
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$199
(American Airlines)

One-way from

$160
(Delta)

Popular in

November

Cheapest in

February

Average price

$292

Good round-trip deal

$279 or less

Good one-way deal

$209 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. 17% potential increase in price ($67 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($14 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 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 July 29, 2025.

This American Airlines deal was found by Cheapflights users on 7/28. 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 9/61:51 pmBIS - ORD
Nonstop2h 18mAmerican Airlines
Tue 9/99:40 amORD - BIS
Nonstop2h 41mAmerican Airlines
Deal found 7/28$199
This Delta deal was found by Cheapflights users on 7/27. 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 8/303:35 pmBIS - ORD
1 stop6h 00mDelta
Sun 8/3111:00 amORD - BIS
1 stop3h 39mDelta
Deal found 7/27$219
This Delta deal was found by Cheapflights users on 7/26. 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 8/245:00 amBIS - STL
1 stop3h 36mDelta
Sun 8/316:00 amSTL - BIS
1 stop5h 34mDelta
Deal found 7/26$249
This American Airlines deal was found by Cheapflights users on 7/26. 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 8/242:59 pmBIS - STL
2 stops8h 56mAmerican Airlines
Sun 8/316:00 amSTL - BIS
1 stop6h 52mAmerican Airlines
Deal found 7/26$254
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Tue 8/122:00 pmBIS - STL
1 stop6h 45mUnited Airlines
Sat 8/165:15 amSTL - BIS
1 stop5h 19mUnited Airlines
Deal found 7/28$259
This Delta deal was found by Cheapflights users on 7/29. 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 9/1312:17 pmBIS - MDW
1 stop5h 18mDelta
Tue 9/167:15 pmMDW - BIS
1 stop4h 07mDelta
Deal found 7/29$279
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1411:36 amBIS - ORD
2 stops22h 42mMultiple Airlines
Wed 9/172:04 pmORD - BIS
2 stops20h 42mMultiple Airlines
Deal found 7/29$367

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 July 29, 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

Sat 9/6

1:51 pm-4:09 pm

Nonstop2h 18m

Chicago O'Hare Intl

Tue 9/9

9:40 am-12:21 pm

Nonstop2h 41m

$199

BismarckChicago

BIS - ORD

BISORD

Bismarck

Sat 8/30

3:35 pm-9:35 pm

1 stop6h 00m

Chicago O'Hare Intl

Sun 8/31

11:00 am-2:39 pm

1 stop3h 39m

$219

BismarckSt. Louis

BIS - STL

BISSTL

Bismarck

Sun 8/24

5:00 am-8:36 am

1 stop3h 36m

Lambert-St Louis

Sun 8/31

6:00 am-11:34 am

1 stop5h 34m

$249

BismarckSt. Louis

BIS - STL

BISSTL

Bismarck

Sun 8/24

2:59 pm-11:55 pm

2 stops8h 56m

Lambert-St Louis

Sun 8/31

6:00 am-12:52 pm

1 stop6h 52m

$254

BismarckSt. Louis

BIS - STL

BISSTL

Bismarck

Tue 8/12

2:00 pm-8:45 pm

1 stop6h 45m

Lambert-St Louis

Sat 8/16

5:15 am-10:34 am

1 stop5h 19m

$259

BismarckChicago

BIS - MDW

BISMDW

Bismarck

Sat 9/13

12:17 pm-5:35 pm

1 stop5h 18m

Chicago Midway

Tue 9/16

7:15 pm-11:22 pm

1 stop4h 07m

$279

BismarckChicago

BIS - ORD

BISORD

Bismarck

Sun 9/14

11:36 am-10:18 am

2 stops22h 42m

Chicago O'Hare Intl

Wed 9/17

2:04 pm-10:46 am

2 stops20h 42m

$367

BismarckChicago

BIS - ORD

BISORD

Bismarck

Sat 8/30

5:00 am-8:23 pm

2 stops15h 23m

$160

BismarckChicago

BIS - ORD

BISORD

Bismarck

Thu 8/14

1:05 pm-4:50 am

1 stop15h 45m

$191

BismarckSt. Louis

BIS - STL

BISSTL

Bismarck

Mon 9/8

5:42 pm-11:24 pm

1 stop5h 42m

$241

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 15 results
1
2

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 July 29, 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 July 29, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, 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
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

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
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

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
8,899 reviews
Delta
8.0
Very good
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

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
7,977 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

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.

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

    One-way options have recently been found by users for as low as $160 on Delta. Other airlines that offer cheap prices include American Airlines from $248 and United Airlines from $254 one-way.

  • 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 (59%), Qatar Airways (59%), Envoy Air( 59%).

  • What are the cheapest flights from Bismarck to Illinois?

    Looking for the cheapest flight from Bismarck to Illinois? While on average our users pay $312, our data indicates the cheapest price to be $124. The most popular route (Bismarck - Chicago O'Hare Intl), is priced around $219.

  • 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$218Average$393FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$247Average$418FlexibilityNo cancel feeOn-time71%

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