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Rapid City

$143+ Cheap flights from Illinois to Rapid City (RAP)

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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — RAP
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap flight deals from Illinois to Rapid City

Cheapest flights from Illinois to Rapid City
Explore the most affordable flight options available from Illinois to Rapid City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/3. 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 12/248:45 amORD - RAP
Nonstop2h 45mUnited Airlines
Sat 12/271:27 pmRAP - ORD
Nonstop2h 36mUnited Airlines
Deal found 12/3$279
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/188:45 amORD - RAP
Nonstop2h 45mUnited Airlines
Wed 12/241:27 pmRAP - ORD
Nonstop2h 36mUnited Airlines
Deal found 12/1$299
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/258:45 amORD - RAP
Nonstop2h 45mUnited Airlines
Wed 12/3112:18 pmRAP - ORD
1 stop8h 01mUnited Airlines
Deal found 12/1$302
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/177:10 amORD - RAP
1 stop7h 01mUnited Airlines
Sun 12/216:05 pmRAP - ORD
1 stop4h 54mUnited Airlines
Deal found 12/1$304
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/162:40 pmORD - RAP
1 stop6h 57mUnited Airlines
Wed 12/241:27 pmRAP - ORD
Nonstop2h 36mUnited Airlines
Deal found 12/1$309
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/188:45 amORD - RAP
Nonstop2h 45mUnited Airlines
Thu 12/2511:11 amRAP - ORD
1 stop6h 44mUnited Airlines
Deal found 12/1$329
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/188:45 amORD - RAP
Nonstop2h 45mUnited Airlines
Tue 12/236:05 pmRAP - ORD
1 stop4h 54mUnited Airlines
Deal found 12/1$330
This Delta deal was found by Cheapflights users on 12/2. 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.
Thu 12/116:00 amORD - RAP
1 stop5h 22mDelta
Sun 12/142:51 pmRAP - ORD
1 stop4h 04mDelta
Deal found 12/2$339
This Delta deal was found by Cheapflights users on 12/3. 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.
Thu 12/119:59 amMDW - RAP
1 stop6h 46mDelta
Sat 12/1311:00 amRAP - MDW
1 stop6h 18mDelta
Deal found 12/3$339
This Delta deal was found by Cheapflights users on 12/3. 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.
Thu 12/116:00 amORD - RAP
1 stop5h 22mDelta
Sat 12/1311:00 amRAP - ORD
2 stops8h 35mDelta
Deal found 12/3$344
This Delta deal was found by Cheapflights users on 12/4. 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 12/55:34 pmSTL - RAP
1 stop6h 12mDelta
Fri 12/124:25 pmRAP - STL
1 stop6h 04mDelta
Deal found 12/4$354
This Delta deal was found by Cheapflights users on 12/3. 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.
Thu 12/119:59 amMDW - RAP
1 stop6h 46mDelta
Sun 12/146:05 amRAP - MDW
1 stop6h 05mDelta
Deal found 12/3$359

Find flight deals from Illinois to Rapid City

Keep the following information in mind while searching for Illinois to Rapid City flight deals. Data was last updated December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$229
(United Airlines)

One-way from

$143
(Kiwi.com)

Popular in

April

Cheapest in

February

Average price

$338

Good round-trip deal

$380 or less
Provider with most accurate pricing for Chicago (CHI)-Rapid City flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Rapid City flights.
Search Deals
From Illinois to Rapid City
Search Deals
One-way flight from Illinois to Rapid City
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($65 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Rapid City.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Rapid City 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 December 4, 2025.
Use the filters below to find and compare flights from Illinois to Rapid City that are best for you.

Fly from

Illinois

Fly to

Rapid City

Route

Depart

Return

Price

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Wed 1/7

6:45 pm-10:28 pm

1 stop4h 43m

Rapid City

Sat 1/10

6:00 am-11:47 am

1 stop4h 47m

$229

MolineRapid City

MLI - RAP

MLIRAP

Moline Quad-City

Mon 1/12

8:46 am-1:12 pm

1 stop5h 26m

Rapid City

Sat 1/17

12:35 pm-8:34 pm

1 stop6h 59m

$249

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 5/13

5:20 am-9:18 am

1 stop4h 58m

Rapid City

Sat 5/23

4:30 pm-11:43 pm

1 stop6h 13m

$249

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 1/14

5:25 pm-10:28 pm

1 stop6h 03m

Rapid City

Sun 1/18

4:10 pm-11:25 pm

1 stop6h 15m

$249

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 1/7

2:45 pm-6:47 pm

1 stop5h 02m

Rapid City

Sun 1/11

2:40 pm-8:58 pm

1 stop5h 18m

$249

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Wed 12/24

8:45 am-10:30 am

Nonstop2h 45m

Rapid City

Sat 12/27

1:27 pm-5:03 pm

Nonstop2h 36m

$279

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Sat 2/14

12:27 pm-3:44 pm

1 stop4h 17m

Rapid City

Tue 2/17

10:54 am-8:44 pm

2 stops8h 50m

$289

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 1/7

6:10 am-10:13 am

1 stop5h 03m

Rapid City

Mon 1/12

10:54 am-8:43 pm

2 stops8h 49m

$299

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Wed 1/7

2:36 pm-8:32 pm

1 stop6h 56m

Rapid City

Sat 1/10

12:35 pm-9:15 pm

1 stop7h 40m

$299

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Tue 12/16

2:40 pm-8:37 pm

1 stop6h 57m

Rapid City

Wed 12/24

1:27 pm-5:03 pm

Nonstop2h 36m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 46 results
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Best time to book a flight from Illinois to Rapid City

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

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

Currently, September is the cheapest month in which you can book a flight from Illinois to Rapid City (average of $203). Flying from Illinois to Rapid City in November is currently the most expensive (average of $806). 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 IL to RAP?

Find hourly flight availability from Illinois to Rapid City. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

It’s optimal to fly from Illinois to Rapid City in the evening. By choosing this option you can save up to 55% on the cost of your flight, compared to a flight in the afternoon.

Related info for your journey

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

    Most people fly into Rapid City (RAP) if they book a flight to Rapid City from Illinois. Rapid City is conveniently located just 9.0 mi from Rapid City’s city center.

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

    Airlines like Delta, United Airlines, and American Airlines fly from Illinois to Rapid City in about 4h 43m. The time it takes to get you to your destination can typically vary by up to 2h 51m. There are 777 mi between Illinois and Rapid City. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    When deciding which route to take from Illinois to Rapid City consider Chicago O'Hare Intl - Rapid City, Chicago Midway - Rapid City or Lambert-St Louis - Rapid City as they are the most popular.

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

    No one likes to see their flight delayed. When booking a flight from Illinois to Rapid City consider choosing United Airlines (86%), Emirates (85%) or Air New Zealand (85%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from Illinois to Rapid City is generally $437, our data shows the cheapest flight currently is $284. When looking at the most popular route, (Chicago O'Hare Intl - Rapid City), you can expect to pay $229 for that flight.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Illinois to Rapid City (average of $203). Flying from Illinois to Rapid City in November is currently the most expensive (average of $806). 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

Traveling to a place near Rapid City?

Book flights to Rapid City if you plan to visit one of these locations
Keystone
Deadwood
Sturgis
Spearfish

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Alternative routes for Illinois to Rapid City

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Illinois to Rapid City

Discover the top 3 airlines that operate flights from Illinois to Rapid City. 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$209Average$470FlexibilityNo cancel feeOn-time71%
DeltaCheapest$228Average$298FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$250Average$415FlexibilityNo cancel feeOn-time69%

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