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$118+ 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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — ORD
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
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 October 23, 2025.

This United Airlines deal was found by Cheapflights users on 10/23. 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.
Sat 11/81:30 pmRAP - ORD
Nonstop2h 27mUnited Airlines
Wed 11/128:45 amORD - RAP
Nonstop2h 49mUnited Airlines
Deal found 10/23$229
This Delta deal was found by Cheapflights users on 10/23. 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 11/156:05 amRAP - MDW
1 stop6h 02mDelta
Mon 11/177:02 pmMDW - RAP
1 stop4h 37mDelta
Deal found 10/23$229
This Delta deal was found by Cheapflights users on 10/23. 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 11/82:25 pmRAP - ORD
1 stop5h 54mDelta
Wed 11/128:55 amORD - RAP
2 stops7h 50mDelta
Deal found 10/23$244
This Delta deal was found by Cheapflights users on 10/22. 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 11/82:25 pmRAP - ORD
1 stop4h 16mDelta
Mon 11/1011:03 amORD - RAP
1 stop5h 42mDelta
Deal found 10/22$249
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/2010:22 amRAP - STL
1 stop5h 06mUnited Airlines
Sun 11/234:43 pmSTL - RAP
1 stop4h 43mUnited Airlines
Deal found 10/21$249
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Fri 11/1412:27 pmRAP - STL
2 stops9h 18mUnited Airlines
Mon 11/171:35 pmSTL - RAP
1 stop6h 08mUnited Airlines
Deal found 10/23$254
This United Airlines deal was found by Cheapflights users on 10/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/112:55 pmRAP - ORD
1 stop5h 13mUnited Airlines
Tue 12/167:10 amORD - RAP
1 stop7h 01mUnited Airlines
Deal found 10/20$259
This Delta deal was found by Cheapflights users on 10/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:05 amRAP - MDW
1 stop6h 03mDelta
Sat 12/205:59 pmMDW - RAP
1 stop5h 42mDelta
Deal found 10/20$269
This Delta deal was found by Cheapflights users on 10/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1311:00 amRAP - ORD
2 stops8h 35mDelta
Sat 12/204:01 pmORD - RAP
1 stop7h 40mDelta
Deal found 10/20$274
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1110:19 pmRAP - ORD
1 stop12h 23mMultiple Airlines
Tue 12/167:20 amORD - RAP
2 stops27h 27mMultiple Airlines
Deal found 10/20$284
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/81:30 pmRAP - ORD
Nonstop2h 27mUnited Airlines
Mon 11/108:45 amORD - RAP
Nonstop2h 49mUnited Airlines
Deal found 10/22$300
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/11:30 pmRAP - ORD
Nonstop2h 27mUnited Airlines
Tue 11/47:10 amORD - RAP
1 stop4h 55mUnited Airlines
Deal found 10/22$309

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 October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$229
(United Airlines)

One-way from

$118
(Kiwi.com)

Popular in

April

Cheapest in

September

Average price

$319

Good round-trip deal

$373 or less

Good one-way deal

$245 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. 14% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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.
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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 October 23, 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

Sat 11/8

1:30 pm-4:57 pm

Nonstop2h 27m

Chicago O'Hare Intl

Wed 11/12

8:45 am-10:34 am

Nonstop2h 49m

$229

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Fri 12/5

4:25 pm-9:40 pm

1 stop4h 15m

Chicago O'Hare Intl

Sun 12/14

6:00 am-10:22 am

1 stop5h 22m

$229

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sat 12/13

2:51 pm-9:40 pm

1 stop5h 49m

Chicago O'Hare Intl

Sat 12/20

4:01 pm-10:41 pm

1 stop7h 40m

$229

Rapid CityChicago

RAP - MDW

RAPMDW

Rapid City

Sat 11/15

6:05 am-1:07 pm

1 stop6h 02m

Chicago Midway

Mon 11/17

7:02 pm-10:39 pm

1 stop4h 37m

$229

Rapid CityChicago

RAP - MDW

RAPMDW

Rapid City

Thu 12/11

6:05 am-1:08 pm

1 stop6h 03m

Chicago Midway

Tue 12/16

9:59 am-2:09 pm

1 stop5h 10m

$229

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sun 11/9

6:00 pm-11:59 pm

1 stop4h 59m

Chicago O'Hare Intl

Mon 11/17

1:55 pm-6:43 pm

1 stop5h 48m

$239

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sat 11/8

2:25 pm-9:19 pm

1 stop5h 54m

Chicago O'Hare Intl

Wed 11/12

11:03 am-3:45 pm

1 stop5h 42m

$239

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sat 2/28

10:40 am-4:48 pm

1 stop5h 08m

Chicago O'Hare Intl

Mon 3/2

7:00 pm-10:14 pm

1 stop4h 14m

$239

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Thu 11/20

10:22 am-4:28 pm

1 stop5h 06m

Lambert-St Louis

Sun 11/23

4:43 pm-8:26 pm

1 stop4h 43m

$249

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sat 11/8

2:25 pm-7:41 pm

1 stop4h 16m

Chicago O'Hare Intl

Mon 11/10

11:03 am-3:45 pm

1 stop5h 42m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/23

Showing 1-10 of 31 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 February is currently the most expensive (average of $315). 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 October 23, 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 October 23, 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
7,982 reviews

Boarding

8.2

Overall

7.9

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,982 reviews
Delta
7.9
Good
7,982 reviews

Boarding

8.2

Overall

7.9

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,995 reviews
Delta
7.9
Good
7,982 reviews

Boarding

8.2

Overall

7.9

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,032 reviews
Delta
7.9
Good
7,982 reviews

Boarding

8.2

Overall

7.9

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 $229, United Airlines can have you in Illinois from Rapid City in 2h 27m. Airlines will cover a distance of 777 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 Envoy Air (78%), American Airlines (71%) or Qatar Airways (60%) 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 $425 for a flight from Rapid City to Illinois. The cheapest flight overall is $195 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 February is currently the most expensive (average of $315). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$189Average$219FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$210Average$356FlexibilityNo cancel feeOn-time69%
DeltaCheapest$228Average$358FlexibilityNo cancel feeOn-timeN/A

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