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$209+ Cheap flights from Rapid City (RAP) to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — ORD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$209
(United Airlines)

Popular in

November

Cheapest in

April

Average price

$353

Good round-trip deal

$437 or less

Good one-way deal

$269 or less
Provider with most accurate pricing for Rapid City-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Rapid City-Chicago (CHI) flights.
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From Rapid City to Illinois
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Highest demand for flights based on searches. 11% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Rapid City to Illinois.
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Price to beat on a one-way flight from Rapid City to Illinois.
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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 February 20, 2025.

This United Airlines deal was found by Cheapflights users on 2/19. 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 4/31:00 pmRAP - ORD
Nonstop2h 28mUnited Airlines
Tue 4/89:15 amORD - RAP
Nonstop2h 37mUnited Airlines
Deal found 2/19$209
This Delta deal was found by Cheapflights users on 2/20. 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 3/2211:45 amRAP - ORD
1 stop4h 43mDelta
Sat 3/2910:20 amORD - RAP
1 stop6h 16mDelta
Deal found 2/20$229
This American Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 7/86:01 pmRAP - ORD
Nonstop2h 14mAmerican Airlines
Tue 7/1511:40 amORD - RAP
Nonstop2h 24mAmerican Airlines
Deal found 2/19$279
This Delta deal was found by Cheapflights users on 2/19. 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 7/96:20 amRAP - MDW
1 stop5h 42mDelta
Tue 7/159:20 amMDW - RAP
1 stop5h 12mDelta
Deal found 2/19$299
This Delta deal was found by Cheapflights users on 2/20. 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.
Thu 2/274:19 pmRAP - STL
1 stop4h 58mDelta
Mon 3/35:30 pmSTL - RAP
1 stop6h 11mDelta
Deal found 2/20$319
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Tue 5/61:34 pmRAP - STL
1 stop6h 27mUnited Airlines
Thu 5/295:20 amSTL - RAP
1 stop4h 44mUnited Airlines
Deal found 2/20$320
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/134:35 pmRAP - STL
1 stop5h 12mAmerican Airlines
Thu 5/295:00 amSTL - RAP
1 stop7h 35mAmerican Airlines
Deal found 2/20$324
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/275:36 pmRAP - ORD
2 stops17h 06mMultiple Airlines
Mon 3/310:00 amORD - RAP
3 stops24h 54mMultiple Airlines
Deal found 2/20$625

Find flights from Rapid City to Illinois within your budget

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 February 20, 2025.

Fly from

Rapid City

Fly to

Illinois

Route

Depart

Return

Price

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Thu 4/3

1:00 pm-4:28 pm

Nonstop2h 28m

Chicago O'Hare Intl

Tue 4/8

9:15 am-10:52 am

Nonstop2h 37m

$209

Rapid CityChicago

RAP - MDW

RAPMDW

Rapid City

Thu 3/6

6:00 am-12:42 pm

1 stop5h 42m

Chicago Midway

Tue 3/11

10:25 am-3:36 pm

1 stop6h 11m

$249

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Thu 3/13

4:16 pm-9:47 pm

1 stop4h 31m

Chicago O'Hare Intl

Tue 3/18

6:15 am-11:04 am

1 stop5h 49m

$264

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Tue 7/8

6:01 pm-9:15 pm

Nonstop2h 14m

Chicago O'Hare Intl

Tue 7/15

11:40 am-1:04 pm

Nonstop2h 24m

$279

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Tue 5/6

1:34 pm-9:01 pm

1 stop6h 27m

Lambert-St Louis

Thu 5/29

5:20 am-9:04 am

1 stop4h 44m

$320

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Tue 5/13

4:35 pm-10:47 pm

1 stop5h 12m

Lambert-St Louis

Thu 5/29

5:00 am-11:35 am

1 stop7h 35m

$324

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Tue 4/22

4:19 pm-9:55 am

2 stops16h 36m

$222

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sat 4/26

12:26 pm-9:15 pm

1 stop7h 49m

$233

Rapid CityChicago

RAP - MDW

RAPMDW

Rapid City

Sat 4/26

11:44 am-5:19 pm

1 stop4h 35m

$234

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sat 4/5

1:00 pm-4:28 pm

Nonstop2h 28m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 11 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.

Travel insights for flights from Rapid City to Illinois

Get recent, data-driven insights about flights from Rapid City to Illinois including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Rapid City to Illinois (average of $245). Flying from Rapid City to Illinois in March is currently the most expensive (average of $321). 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.

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 23.0 F).

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 February 20, 2025.
Read reviews from past customers who have flown Delta, United Airlines and American Airlines from Rapid City to Illinois. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

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
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

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
8,765 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

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
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

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 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.

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

    One-way options have recently been found by users for as low as $222 on Delta. Other airlines that offer cheap prices include American Airlines from $233 and United Airlines from $259 one-way.

  • 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 SkyWest Airlines (58%), Emirates (58%) or United Airlines (58%) 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 $400 for a flight from Rapid City to Illinois. The cheapest flight overall is $223 while the most popular route, (Rapid City - Chicago O'Hare Intl) is currently priced at $209.

  • 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, August is the cheapest month in which you can book a flight from Rapid City to Illinois (average of $245). Flying from Rapid City to Illinois in March is currently the most expensive (average of $321). 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

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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$189Average$260FlexibilityNo cancel feeOn-time71%
DeltaCheapest$228Average$343FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$242Average$382FlexibilityNo cancel feeOn-time69%
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