HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Rapid City

$121+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — RAP
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Rapid City 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
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 Illinois to Rapid City

Keep the following information in mind while searching for Illinois to Rapid City flight deals. Data was last updated March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$241
(Delta)

One-way from

$121
(Mytrip)

Popular in

May

Cheapest in

February

Average price

$373

Good round-trip deal

$279 or less

Good one-way deal

$223 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. 10% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Rapid City.
Search Deals
Price to beat on a one-way flight from Illinois to Rapid City.
Search Deals

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 March 31, 2025.

This Delta deal was found by Cheapflights users on 3/31. 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 7/85:20 pmORD - RAP
1 stop5h 36mDelta
Wed 7/162:20 pmRAP - ORD
1 stop4h 23mDelta
Deal found 3/31$241
This United Airlines deal was found by Cheapflights users on 3/31. 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 6/105:02 amORD - RAP
1 stop5h 02mUnited Airlines
Wed 6/116:20 amRAP - ORD
Nonstop2h 27mUnited Airlines
Deal found 3/31$244
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/234:45 pmSTL - RAP
1 stop6h 15mUnited Airlines
Wed 4/303:43 pmRAP - STL
1 stop7h 05mUnited Airlines
Deal found 3/30$249
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/153:50 pmMLI - RAP
2 stops7h 10mUnited Airlines
Sat 4/1912:59 pmRAP - MLI
1 stop7h 36mUnited Airlines
Deal found 3/30$264
This Delta deal was found by Cheapflights users on 3/30. 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.
Sat 4/261:46 pmSTL - RAP
2 stops9h 44mDelta
Sat 5/34:19 pmRAP - STL
1 stop4h 39mDelta
Deal found 3/30$274
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Sun 6/2210:04 amORD - RAP
Nonstop2h 25mAmerican Airlines
Sun 6/296:14 pmRAP - ORD
Nonstop2h 16mAmerican Airlines
Deal found 3/31$278
This American Airlines deal was found by Cheapflights users on 3/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/311:24 amMLI - RAP
1 stop7h 20mAmerican Airlines
Fri 7/410:16 amRAP - MLI
1 stop7h 43mAmerican Airlines
Deal found 3/30$279
This American Airlines deal was found by Cheapflights users on 3/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/145:36 amSTL - RAP
1 stop5h 01mAmerican Airlines
Tue 8/194:42 pmRAP - STL
1 stop4h 48mAmerican Airlines
Deal found 3/30$279
This United Airlines deal was found by Cheapflights users on 3/31. 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 4/152:32 pmPIA - RAP
2 stops8h 28mUnited Airlines
Sat 4/191:21 pmRAP - PIA
1 stop6h 30mUnited Airlines
Deal found 3/31$334
This Delta deal was found by Cheapflights users on 3/31. 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.
Mon 4/287:00 pmMDW - RAP
1 stop4h 30mDelta
Mon 5/511:45 amRAP - MDW
1 stop4h 34mDelta
Deal found 3/31$355
This Mytrip deal was found by Cheapflights users on 3/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/248:00 amORD - RAP
1 stop9h 50mMultiple Airlines
Sun 4/275:40 pmRAP - ORD
2 stops35h 05mMultiple Airlines
Deal found 3/31$383
This Mytrip deal was found by Cheapflights users on 3/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/298:20 pmMDW - RAP
2 stops18h 22mAllegiant Air
Sat 5/313:32 pmRAP - MDW
2 stops26h 58mAllegiant Air
Deal found 3/30$406

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 March 31, 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

Tue 7/8

5:20 pm-9:56 pm

1 stop5h 36m

Rapid City

Wed 7/16

2:20 pm-7:43 pm

1 stop4h 23m

$241

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Tue 6/10

5:02 am-9:04 am

1 stop5h 02m

Rapid City

Wed 6/11

6:20 am-9:47 am

Nonstop2h 27m

$244

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 4/23

4:45 pm-10:00 pm

1 stop6h 15m

Rapid City

Wed 4/30

3:43 pm-11:48 pm

1 stop7h 05m

$249

MolineRapid City

MLI - RAP

MLIRAP

Moline Quad-City

Tue 4/15

3:50 pm-10:00 pm

2 stops7h 10m

Rapid City

Sat 4/19

12:59 pm-9:35 pm

1 stop7h 36m

$264

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 4/26

1:46 pm-10:30 pm

2 stops9h 44m

Rapid City

Sat 5/3

4:19 pm-9:58 pm

1 stop4h 39m

$274

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Sun 6/22

10:04 am-11:29 am

Nonstop2h 25m

Rapid City

Sun 6/29

6:14 pm-9:30 pm

Nonstop2h 16m

$278

MolineRapid City

MLI - RAP

MLIRAP

Moline Quad-City

Thu 7/3

11:24 am-5:44 pm

1 stop7h 20m

Rapid City

Fri 7/4

10:16 am-6:59 pm

1 stop7h 43m

$279

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 8/14

5:36 am-9:37 am

1 stop5h 01m

Rapid City

Tue 8/19

4:42 pm-10:30 pm

1 stop4h 48m

$279

PeoriaRapid City

PIA - RAP

PIARAP

Greater Peoria

Tue 4/15

2:32 pm-10:00 pm

2 stops8h 28m

Rapid City

Sat 4/19

1:21 pm-8:51 pm

1 stop6h 30m

$334

ChicagoRapid City

MDW - RAP

MDWRAP

Chicago Midway

Mon 4/28

7:00 pm-10:30 pm

1 stop4h 30m

Rapid City

Mon 5/5

11:45 am-5:19 pm

1 stop4h 34m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 27 results
1
2
3

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, January is the cheapest month in which you can book a flight from Illinois to Rapid City (average of $348). Flying from Illinois to Rapid City in May is currently the most expensive (average of $562). 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 March 31, 2025.

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

Weekly flight availability from Illinois to Rapid City

Explore weekly flight availability from Illinois to Rapid City. 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 March 31, 2025.

The most flights from USIL to RAP are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Rapid City by month

Plan your trip to Rapid City by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Rapid City ranges from 0.3 - 3.2 inches per month. May is typically the wettest month, when rainfall can reach 3.2 in. January is typically the driest time to visit Rapid City when rainfall is around 0.3 in.

Temperature in Rapid City by month

Plan your trip to Rapid City by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Rapid City, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.8 F).

Reviews of airlines servicing Rapid City

Get insights into the airlines that provide service to Rapid City. 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 Rapid City. Reviews last updated March 31, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines and Allegiant Air from Illinois to Rapid City to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,614 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Allegiant Air
7.3
Good
731 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

8.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines to fly from Illinois to Rapid City one-way?

    One-way options have recently been found by users for as low as $152 on American Airlines. Other airlines that offer cheap prices include United Airlines from $177 and Delta from $190 one-way.

  • 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, Lambert-St Louis - Rapid City or Chicago Midway - Rapid City as they are the most popular.

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

    While on average a flight from Illinois to Rapid City is generally $361, our data shows the cheapest flight currently is $209. When looking at the most popular route, (Chicago O'Hare Intl - Rapid City), you can expect to pay $189 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, January is the cheapest month in which you can book a flight from Illinois to Rapid City (average of $348). Flying from Illinois to Rapid City in May is currently the most expensive (average of $562). 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 Illinois?

Book flights to Illinois if you plan to visit one of these locations
Deadwood
Spearfish
Keystone
Sturgis
Wall

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Rapid City

See prices for flight routes from nearby airports that may be better suited for you.
Minneapolis to Rapid City flights
Portland to Sioux Falls flights
John F Kennedy Intl to Rapid City flights
Seattle to Rapid City flights
Los Angeles to Rapid City flights
Newark to Rapid City flights
Boston to Rapid City flights
Denver to Sioux Falls flights
O'Hare Intl to Rapid City flights
Philadelphia to Rapid City flights
Baltimore to Rapid City flights
LaGuardia to Rapid City flights
Orlando to Rapid City flights
Sky Harbor Intl to Sioux Falls flights
Dulles Intl to Rapid City flights
Ontario to Sioux Falls flights
Dallas/Fort Worth to Sioux Falls flights
Dallas/Fort Worth to Rapid City flights
San Francisco to Sioux Falls flights
Dulles Intl to Sioux Falls flights
Pittsburgh to Rapid City flights
Reagan-National to Sioux Falls flights
St. Louis to Rapid City flights
Los Angeles to Sioux Falls flights
Raleigh to Rapid City flights
Charlotte to Sioux Falls flights
Charlotte to Rapid City flights
Hobby to Sioux Falls flights
Reagan-National to Rapid City flights
John F Kennedy Intl to Sioux Falls flights
Tampa to Rapid City flights
Orlando to Sioux Falls flights
O'Hare Intl to Sioux Falls flights
Salt Lake City to Sioux Falls flights
Boston to Sioux Falls flights
Seattle to Sioux Falls flights
Atlanta to Rapid City flights
Newark to Sioux Falls flights
Milwaukee to Rapid City flights
San Francisco to Rapid City flights
Raleigh to Sioux Falls flights
Harrisburg to Rapid City flights
Ontario to Rapid City flights
San Diego to Sioux Falls flights
Midway to Rapid City flights
Portland to Rapid City flights
Manchester to Rapid City flights
Boise to Sioux Falls flights
George Bush Intcntl to Sioux Falls flights
LaGuardia to Sioux Falls flights

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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$209Average$313FlexibilityNo cancel feeOn-time71%
DeltaCheapest$218Average$402FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$245Average$376FlexibilityNo cancel feeOn-time69%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.