$199+ Cheap flights from Bismarck (BIS) 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — ORD
Oct 30 — Nov 61
Round-trip
1 adult, Economy
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Find cheap flights from Bismarck to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Bismarck to Illinois
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One-way
Cheapest flights from Bismarck to IllinoisExplore 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 30, 2026.
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 30, 2026.
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/31:06 pm -
Nonstop2h 19m
Sat 11/79:59 am -
Nonstop2h 34m
Deal found 9/29![American Airlines logo]()
$345
This Delta deal was found by Cheapflights users on 9/30. 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 11/35:15 pm -
1 stop4h 12m
Sat 11/75:30 pm -
1 stop5h 55m
Deal found 9/30![Delta logo]()
$365
This Delta deal was found by Cheapflights users on 9/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:11 am -
2 stops8h 21m
Sat 10/317:00 am -
2 stops9h 26m
Deal found 9/28![Delta logo]()
$375
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:00 pm -
Nonstop2h 18m
Sat 10/319:53 am -
Nonstop2h 30m
Deal found 9/29![American Airlines logo]()
$382
This American Airlines deal was found by Cheapflights users on 9/28. 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.
Thu 10/291:00 pm -
Nonstop2h 18m
Sat 10/319:53 am -
Nonstop2h 30m
Deal found 9/28![American Airlines logo]()
$387
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/71:11 pm -
Nonstop2h 19m
Sat 11/149:59 am -
Nonstop2h 34m
Deal found 9/29![American Airlines logo]()
$401
This Delta deal was found by Cheapflights users on 9/26. 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.
Tue 10/205:00 am -
1 stop6h 40m
Tue 10/279:59 am -
1 stop4h 39m
Deal found 9/26![Delta logo]()
$402
This Delta deal was found by Cheapflights users on 9/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/75:15 pm -
1 stop4h 12m
Sat 11/147:25 am -
2 stops9h 04m
Deal found 9/28![Delta logo]()
$407
Best flights from Bismarck to IllinoisDiscover carefully curated flight deals from Bismarck to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 30, 2026.
Discover carefully curated flight deals from Bismarck to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 30, 2026.
This Delta deal was found by Cheapflights users on 9/29. 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.
Tue 10/65:00 am -
1 stop3h 53m
Sat 10/103:30 pm -
1 stop4h 25m
Deal found 9/29![Delta logo]()
$439
This Delta deal was found by Cheapflights users on 9/27. 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.
Tue 11/35:00 am -
2 stops7h 59m
Sat 11/71:55 pm -
2 stops9h 30m
Deal found 9/27![Delta logo]()
$442
This Delta deal was found by Cheapflights users on 9/29. 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.
Tue 10/205:00 am -
2 stops7h 59m
Tue 10/275:30 pm -
1 stop5h 55m
Deal found 9/29![Delta logo]()
$444
This Delta deal was found by Cheapflights users on 9/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:11 am -
2 stops8h 15m
Sat 11/147:25 am -
2 stops9h 04m
Deal found 9/28![Delta logo]()
$479
This Delta deal was found by Cheapflights users on 9/27. 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.
Tue 10/65:00 am -
1 stop3h 53m
Mon 10/1211:19 am -
2 stops8h 36m
Deal found 9/27![Delta logo]()
$514
Last-minute flights from Bismarck to IllinoisDiscover last-minute flight deals from Bismarck to Illinois. Data last updated September 30, 2026 and is based on user searches.
Discover last-minute flight deals from Bismarck to Illinois. Data last updated September 30, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/612:56 pm -
Nonstop2h 18m
Sat 10/109:53 am -
Nonstop2h 30m
Deal found 9/27![American Airlines logo]()
$419
This Delta deal was found by Cheapflights users on 9/30. 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 10/612:40 pm -
1 stop4h 00m
Sat 10/105:30 pm -
1 stop5h 55m
Deal found 9/30![Delta logo]()
$439
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/712:56 pm -
Nonstop2h 18m
Tue 10/139:53 am -
Nonstop2h 30m
Deal found 9/29![American Airlines logo]()
$457
This American Airlines deal was found by Cheapflights users on 9/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/712:56 pm -
Nonstop2h 18m
Sat 10/109:53 am -
Nonstop2h 30m
Deal found 9/27![American Airlines logo]()
$476
One-way flights from Bismarck to IllinoisSearch for one-way flight options from Bismarck to Illinois. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
Search for one-way flight options from Bismarck to Illinois. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/19:14 pm -
3 stops51h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 9/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2210:10 pm -
1 stop31h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Multiple Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/259:14 pm -
1 stop32h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2910:36 pm -
3 stops49h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$229
Find 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 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $345 (American Airlines) |
One-way from | $199 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
Average price | $551 |
Good round-trip deal | $470 or less |
Good one-way deal | $347 or less |
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 7,457,451 searches. Data last updated September 30, 2026.
Use the filters below to find and compare flights from Bismarck to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Wed 10/7
12:56 pm-3:14 pm
Nonstop2h 18m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$304
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Tue 12/29
9:43 pm-9:21 pm
2 stops23h 38m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$312
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Tue 10/27
1:02 pm-6:29 am
2 stops17h 27m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$383
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Wed 10/28
9:00 am-9:00 am
2 stops24h 00m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$383
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Tue 10/27
5:00 am-11:40 am
1 stop6h 40m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$408
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Wed 10/28
3:18 pm-9:27 pm
1 stop6h 09m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$408
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Sat 10/24
5:00 am-8:53 am
1 stop3h 53m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$408
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Fri 10/23
5:00 am-8:53 am
1 stop3h 53m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$433
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Tue 10/6
5:00 am-8:53 am
1 stop3h 53m
Chicago O'Hare Intl
Sat 10/10
3:30 pm-7:55 pm
1 stop4h 25m
$439
BismarckChicago
BIS Bismarck - ORD Chicago O'Hare Intl
BISORD
Bismarck
Tue 11/3
5:00 am-12:59 pm
2 stops7h 59m
Chicago O'Hare Intl
Sat 11/7
1:55 pm-11:25 pm
2 stops9h 30m
$442
Showing 1-10 of 13 resultsSorted by cheapest first
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.
BIS-ORD
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
BIS-USIL
BIS-ORD
What is the cheapest month to book a flight from Bismarck to Illinois?
Currently, November is the cheapest month in which you can book a flight from Bismarck to Illinois (average of $262). Flying from Bismarck to Illinois in December is currently the most expensive (average of $685). 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 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 30, 2026.
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.
Weekly flight availability from Bismarck to Illinois
Explore weekly flight availability from Bismarck 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 September 30, 2026.
The most flights from BIS to USIL are scheduled on a Monday (2 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (1 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 September 30, 2026.
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.
Crew
8.5
Entertainment
7.8
Overall
7.8
Boarding
8.1
Comfort
7.8
Food
7.2
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Crew
8.5
Entertainment
7.8
Overall
7.8
Boarding
8.1
Comfort
7.8
Food
7.2
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Crew
8.5
Entertainment
7.8
Overall
7.8
Boarding
8.1
Comfort
7.8
Food
7.2
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
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.
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Alternative routes for Bismarck to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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Bismarck and Illinois flights
Browse other Bismarck and Illinois flight options. Last updated on September 30, 2026.
Popular flight searches
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Bismarck to Illinois flights
Consider these flights traveling from Bismarck to Illinois.
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 7,457,451 searches. Data last updated September 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$267 | Average$327 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$286 | Average$448 | FlexibilityNo cancel fee | On-time71% |