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Rapid City

$128+ 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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — RAP
nov. 21 — nov. 281
vie. 11/21
vie. 11/28
1 adult, Economy
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Cheap 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 octubre 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$219
(United Airlines)

One-way from

$128
(Kiwi.com)

Popular in

April

Cheapest in

February

Average price

$295

Good round-trip deal

$269 or less
Provider with most accurate pricing for Chicago (CHI)-Rapid City flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Rapid City flights.
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From Illinois to Rapid City
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One-way flight from Illinois to Rapid City
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Highest demand for flights based on searches. 19% potential increase in price ($84 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Illinois to Rapid City.
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Find 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 octubre 22, 2025.

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.
jue. 11/138:45 amORD - RAP
Nonstop2h 49mUnited Airlines
jue. 11/206:00 pmRAP - ORD
1 stop4h 59mUnited Airlines
Deal found 10/20$219
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/48:50 amORD - RAP
1 stop6h 19mDelta
mar. 12/911:02 amRAP - ORD
1 stop4h 55mDelta
Deal found 10/21$229
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.
jue. 12/49:59 amMDW - RAP
1 stop5h 10mDelta
mar. 12/96:05 amRAP - MDW
1 stop6h 03mDelta
Deal found 10/20$229
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.
jue. 11/136:00 amORD - RAP
1 stop5h 27mDelta
lun. 11/172:51 pmRAP - ORD
2 stops8h 11mDelta
Deal found 10/20$235
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.
jue. 11/139:41 amMDW - RAP
1 stop5h 30mDelta
lun. 11/172:51 pmRAP - MDW
2 stops7h 49mDelta
Deal found 10/20$235
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.
lun. 11/178:45 amORD - RAP
Nonstop2h 49mUnited Airlines
lun. 11/243:18 pmRAP - ORD
1 stop7h 41mUnited Airlines
Deal found 10/21$239
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.
mié. 11/58:45 amORD - RAP
Nonstop2h 49mUnited Airlines
dom. 11/91:30 pmRAP - ORD
Nonstop2h 27mUnited Airlines
Deal found 10/21$245
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.
vie. 11/71:55 pmORD - RAP
1 stop7h 31mUnited Airlines
lun. 11/101:30 pmRAP - ORD
Nonstop2h 27mUnited Airlines
Deal found 10/20$246
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.
vie. 11/72:40 pmORD - RAP
1 stop6h 46mUnited Airlines
dom. 11/96:00 pmRAP - ORD
1 stop4h 59mUnited Airlines
Deal found 10/21$249
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.
mar. 11/41:25 pmORD - RAP
2 stops10h 11mDelta
sáb. 11/82:25 pmRAP - ORD
1 stop4h 16mDelta
Deal found 10/20$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.
mar. 11/41:35 pmSTL - RAP
1 stop6h 08mUnited Airlines
sáb. 11/85:15 amRAP - STL
1 stop6h 24mUnited 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.
jue. 12/255:59 pmMDW - RAP
1 stop5h 42mDelta
lun. 1/56:20 amRAP - MDW
1 stop5h 48mDelta
Deal found 10/20$269

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 octubre 22, 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

jue. 11/13

8:45 am-10:34 am

Nonstop2h 49m

Rapid City

jue. 11/20

6:00 pm-11:59 pm

1 stop4h 59m

$219

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

jue. 12/11

8:50 am-2:09 pm

1 stop6h 19m

Rapid City

dom. 12/14

6:05 am-11:40 am

1 stop4h 35m

$229

ChicagoRapid City

MDW - RAP

MDWRAP

Chicago Midway

vie. 1/2

11:48 am-3:34 pm

1 stop4h 46m

Rapid City

jue. 1/8

10:40 am-6:08 pm

1 stop6h 28m

$229

ChicagoRapid City

MDW - RAP

MDWRAP

Chicago Midway

jue. 12/4

9:59 am-2:09 pm

1 stop5h 10m

Rapid City

mar. 12/9

6:05 am-1:08 pm

1 stop6h 03m

$229

ChicagoRapid City

MDW - RAP

MDWRAP

Chicago Midway

jue. 12/11

9:59 am-3:45 pm

1 stop6h 46m

Rapid City

dom. 12/14

11:02 am-6:18 pm

1 stop6h 16m

$229

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

jue. 12/4

6:45 am-3:45 pm

2 stops10h 00m

Rapid City

mar. 12/9

6:05 am-11:40 am

1 stop4h 35m

$234

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

jue. 11/13

6:00 am-10:27 am

1 stop5h 27m

Rapid City

lun. 11/17

2:51 pm-12:02 am

2 stops8h 11m

$235

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

mar. 11/4

6:08 am-9:53 am

1 stop4h 45m

Rapid City

sáb. 11/8

2:25 pm-9:19 pm

1 stop5h 54m

$249

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

mié. 11/5

6:00 am-9:53 am

1 stop4h 53m

Rapid City

dom. 11/9

4:25 pm-11:23 pm

1 stop5h 58m

$259

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

mar. 11/4

4:55 pm-8:26 pm

1 stop4h 31m

Rapid City

sáb. 11/8

5:15 am-2:24 pm

2 stops8h 09m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 45 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 March is currently the most expensive (average of $291). 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 octubre 22, 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.

What is the cheapest day to fly from Illinois to Rapid City?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Rapid City. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Rapid City flight should consider departing on Wednesday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 United Airlines, Delta, and American Airlines fly from Illinois to Rapid City in about 2h 49m. The time it takes to get you to your destination can typically vary by up to 3h 42m. 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 Envoy Air (86%), American Airlines (81%) or SkyWest Airlines (72%) 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 $349, our data shows the cheapest flight currently is $258. 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 March is currently the most expensive (average of $291). 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
Deadwood
Keystone
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 octubre 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$209Average$349FlexibilityNo cancel feeOn-time71%
DeltaCheapest$228Average$298FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$232Average$415FlexibilityNo cancel feeOn-time69%

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