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$128+ Cheap flights from Rapid City (RAP) 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — ORD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Find flight deals from Rapid City to Illinois

Cheapest flights from Rapid City to Illinois
Explore the most affordable flight options available from Rapid City to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 26, 2025.

This Delta deal was found by Cheapflights users on 11/24. 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 12/132:51 pmRAP - ORD
1 stop5h 49mDelta
Fri 12/196:00 amORD - RAP
1 stop5h 22mDelta
Deal found 11/24$249
This Delta deal was found by Cheapflights users on 11/24. 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 12/92:51 pmRAP - ORD
1 stop5h 49mDelta
Sat 12/136:00 amORD - RAP
1 stop5h 20mDelta
Deal found 11/24$269
This Delta deal was found by Cheapflights users on 11/25. 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 12/104:25 pmRAP - STL
1 stop6h 04mDelta
Sun 12/146:00 amSTL - RAP
1 stop5h 22mDelta
Deal found 11/25$279
This United Airlines deal was found by Cheapflights users on 11/25. 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.
Wed 12/1012:41 pmRAP - STL
2 stops9h 04mUnited Airlines
Sun 12/141:35 pmSTL - RAP
1 stop6h 19mUnited Airlines
Deal found 11/25$284
This United Airlines deal was found by Cheapflights users on 11/23. 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.
Wed 12/1012:41 pmRAP - ORD
1 stop7h 27mUnited Airlines
Mon 12/156:15 pmORD - RAP
1 stop5h 00mUnited Airlines
Deal found 11/23$290
This Delta deal was found by Cheapflights users on 11/24. 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 12/911:02 amRAP - MDW
1 stop6h 16mDelta
Sat 12/137:02 pmMDW - RAP
1 stop4h 44mDelta
Deal found 11/24$304
This United Airlines deal was found by Cheapflights users on 11/23. 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.
Mon 12/226:05 pmRAP - ORD
1 stop4h 54mUnited Airlines
Fri 1/96:15 pmORD - RAP
1 stop5h 14mUnited Airlines
Deal found 11/23$306
This Kiwi.com deal was found by Cheapflights users on 11/23. 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.
Tue 12/2311:05 amRAP - ORD
2 stops34h 40mMultiple Airlines
Wed 1/77:57 pmORD - RAP
1 stop26h 23mMultiple Airlines
Deal found 11/23$307
This Delta deal was found by Cheapflights users on 11/23. 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 12/66:05 amRAP - STL
1 stop5h 09mDelta
Tue 12/96:00 amSTL - RAP
1 stop5h 22mDelta
Deal found 11/23$309
This United Airlines deal was found by Cheapflights users on 11/23. 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 12/2512:18 pmRAP - ORD
1 stop6h 42mUnited Airlines
Sat 1/107:00 amORD - RAP
1 stop7h 12mUnited Airlines
Deal found 11/23$319
This Delta deal was found by Cheapflights users on 11/23. 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 12/1911:02 amRAP - ORD
1 stop4h 55mDelta
Tue 1/66:15 amORD - RAP
1 stop4h 58mDelta
Deal found 11/23$324
This Delta deal was found by Cheapflights users on 11/23. 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 12/1911:02 amRAP - ORD
1 stop4h 55mDelta
Mon 1/121:55 pmORD - RAP
2 stops9h 33mDelta
Deal found 11/23$329

Cheap flight deals from Rapid City to Illinois

Keep the following information in mind while searching for Rapid City to Illinois flight deals. Data was last updated November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$229
(Delta)

One-way from

$128
(Kiwi.com)

Popular in

April

Cheapest in

September

Average price

$433

Good round-trip deal

$353 or less

Good one-way deal

$258 or less
Provider with most accurate pricing for Rapid City-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Rapid City-Chicago (CHI) flights.
Search Deals
From Rapid City to Illinois
Search Deals
One-way flight from Rapid City to Illinois
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Rapid City to Illinois.
Search Deals
Price to beat on a one-way flight from Rapid City to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Rapid City 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 November 26, 2025.
Use the filters below to find and compare flights from Rapid City to Illinois that are best for you.

Fly from

Rapid City

Fly to

Illinois

Route

Depart

Return

Price

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Wed 1/14

10:54 am-5:55 pm

1 stop6h 01m

Chicago O'Hare Intl

Sun 1/18

6:15 am-10:13 am

1 stop4h 58m

$229

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Tue 1/20

10:54 am-5:55 pm

1 stop6h 01m

Chicago O'Hare Intl

Tue 1/27

6:15 am-10:13 am

1 stop4h 58m

$229

Rapid CityChicago

RAP - MDW

RAPMDW

Rapid City

Tue 1/20

10:54 am-6:36 pm

1 stop6h 42m

Chicago Midway

Tue 1/27

7:16 pm-10:28 pm

1 stop4h 12m

$229

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Wed 1/14

6:00 am-5:26 pm

2 stops10h 26m

Chicago O'Hare Intl

Sat 1/17

6:15 am-10:13 am

1 stop4h 58m

$234

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Tue 1/13

6:00 am-5:26 pm

2 stops10h 26m

Chicago O'Hare Intl

Sat 1/17

6:45 pm-10:28 pm

1 stop4h 43m

$234

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Sun 2/1

2:40 pm-8:58 pm

1 stop5h 18m

Lambert-St Louis

Mon 2/16

2:45 pm-8:44 pm

1 stop6h 59m

$249

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Mon 1/12

10:54 am-5:55 pm

1 stop6h 01m

Chicago O'Hare Intl

Sat 1/17

6:45 pm-10:28 pm

1 stop4h 43m

$249

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Fri 1/9

4:10 pm-11:25 pm

1 stop6h 15m

Lambert-St Louis

Sun 1/11

6:10 am-10:13 am

1 stop5h 03m

$249

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Thu 1/29

4:10 pm-11:25 pm

1 stop6h 15m

Lambert-St Louis

Wed 2/11

6:10 am-10:11 am

1 stop5h 01m

$249

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Fri 1/16

10:54 am-5:55 pm

1 stop6h 01m

Chicago O'Hare Intl

Sat 1/24

6:50 am-3:25 pm

2 stops9h 35m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

Showing 1-10 of 26 results
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Best time to book a flight from Rapid City to Illinois

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

What is the cheapest month to book a flight from Rapid City to Illinois?

Currently, May is the cheapest month in which you can book a flight from Rapid City to Illinois (average of $189). Flying from Rapid City to Illinois in April is currently the most expensive (average of $293). 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 RAP to IL?

Find hourly flight availability from Rapid City 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 November 26, 2025.

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

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 November 26, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Rapid City 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
7.9
Good
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,046 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,038 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Rapid City 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 Rapid City to Illinois?

    Rapid City (RAP), located 9.0 mi from the city center, is the airport you fly out of when you book flights from Rapid City to Illinois.

  • How long is the flight from Rapid City to Illinois?

    For as low as $249, Delta can have you in Illinois from Rapid City in 5h 18m. Airlines will cover a distance of 751 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Rapid City to Illinois?

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

  • What are the most reliable airlines from Rapid City to Illinois?

    No one likes to see their flight delayed. When booking a flight from Rapid City to Illinois consider choosing American Airlines (88%), Envoy Air (88%) or Emirates (82%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Rapid City to Illinois?

    On average you can expect to pay $397 for a flight from Rapid City to Illinois. The cheapest flight overall is $175 while the most popular route, (Rapid City - Chicago O'Hare Intl) is currently priced at $229.

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

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

  • How can I find direct flights from Rapid City to Illinois?

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

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

    Yes. Cheapflights offers flight deals from Rapid City 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 Rapid City to Illinois?

    Currently, May is the cheapest month in which you can book a flight from Rapid City to Illinois (average of $189). Flying from Rapid City to Illinois in April is currently the most expensive (average of $293). 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 Rapid City to Illinois

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Top 3 airlines flying from Rapid City to Illinois

Discover the top 3 airlines that operate flights from Rapid City 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$189Average$219FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$210Average$352FlexibilityNo cancel feeOn-time69%
DeltaCheapest$228Average$358FlexibilityNo cancel feeOn-timeN/A

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