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$239+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — ORD
ene. 26 — feb. 21
dom. 1/26
dom. 2/2
1 adult, Economy
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Cheap flight deals from Rapid City to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Rapid City (RAP) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 21, 2025.

Round-trip from

$259
(Delta)

One-way from

$239
(Delta)

Good round-trip deal

$424 or less

Good one-way deal

$369 or less
From Rapid City to Illinois
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One-way 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 enero 21, 2025.

This Delta deal was found by Cheapflights users on 1/19. 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.
mar. 2/44:19 pmRAP - STL
1 stop5h 50mDelta
sáb. 2/86:00 amSTL - RAP
1 stop6h 04mDelta
Deal found 1/19$259
This United Airlines deal was found by Cheapflights users on 1/20. 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. 5/912:45 pmRAP - ORD
Nonstop2h 18mUnited Airlines
dom. 5/117:35 pmORD - RAP
Nonstop2h 39mUnited Airlines
Deal found 1/20$269
This Delta deal was found by Cheapflights users on 1/21. 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. 3/611:49 amRAP - MDW
1 stop4h 54mDelta
mar. 3/117:09 pmMDW - RAP
1 stop4h 25mDelta
Deal found 1/21$289
This Delta deal was found by Cheapflights users on 1/20. 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. 2/2011:49 amRAP - ORD
2 stops8h 04mDelta
jue. 2/276:15 amORD - RAP
1 stop5h 49mDelta
Deal found 1/20$294
This American Airlines deal was found by Cheapflights users on 1/20. 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.
jue. 1/305:24 amRAP - STL
1 stop6h 36mAmerican Airlines
sáb. 3/17:04 amSTL - RAP
1 stop5h 49mAmerican Airlines
Deal found 1/20$364
This United deal was found by Cheapflights users on 1/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 1/315:20 amRAP - STL
2 stops9h 18mUnited Airlines
dom. 2/29:44 amSTL - RAP
2 stops11h 53mUnited Airlines
Deal found 1/20$399
This Mytrip deal was found by Cheapflights users on 1/20. 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.
jue. 2/205:42 pmRAP - ORD
3 stops17h 00mMultiple Airlines
jue. 2/2710:45 pmORD - RAP
2 stops22h 29mMultiple Airlines
Deal found 1/20$433
This American Airlines deal was found by Cheapflights users on 1/20. 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.
lun. 5/1212:50 pmRAP - ORD
Nonstop2h 16mAmerican Airlines
vie. 5/1610:00 amORD - RAP
Nonstop2h 30mAmerican Airlines
Deal found 1/20$587

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 enero 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

mar. 2/4

4:19 pm-11:09 pm

1 stop5h 50m

Lambert-St Louis

sáb. 2/8

6:00 am-11:04 am

1 stop6h 04m

$259

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

jue. 3/6

6:00 am-11:30 am

1 stop4h 30m

Chicago O'Hare Intl

mar. 3/11

6:15 am-11:04 am

1 stop5h 49m

$289

Rapid CityChicago

RAP - MDW

RAPMDW

Rapid City

jue. 3/6

11:49 am-5:43 pm

1 stop4h 54m

Chicago Midway

mar. 3/11

7:09 pm-10:34 pm

1 stop4h 25m

$289

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

vie. 1/31

5:20 am-3:38 pm

2 stops9h 18m

Lambert-St Louis

dom. 2/2

9:44 am-8:37 pm

2 stops11h 53m

$399

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

jue. 3/6

7:00 am-8:00 pm

2 stops12h 00m

Chicago O'Hare Intl

mar. 3/11

10:50 am-8:57 pm

2 stops11h 07m

$526

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

mar. 1/28

4:19 pm-9:58 pm

1 stop4h 39m

$239

Rapid CityChicago

RAP - MDW

RAPMDW

Rapid City

mar. 1/28

6:00 am-12:46 pm

1 stop5h 46m

$239

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

mar. 2/18

3:40 pm-9:34 am

1 stop16h 54m

$269

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

vie. 2/21

12:24 pm-8:21 am

1 stop18h 57m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

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 $320). 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 enero 21, 2025.
Read reviews from past customers who have flown Delta and United 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
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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

United Airlines
7.4
Good
8,985 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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 $239 on Delta. Other airlines that offer cheap prices include United Airlines from $269 and American Airlines from $279 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 Emirates (84%), SkyWest Airlines (80%) or United Airlines (80%) 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 $629 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 $320). 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 enero 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$212Average$260FlexibilityNo cancel feeOn-time71%
DeltaCheapest$228Average$338FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$242Average$402FlexibilityNo cancel feeOn-time69%
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