Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Rapid City to Illinois from $125

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Rapid City to Illinois departing on 3/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Rapid City to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
9:20 am - 12:45 pm
RAP
-
ORD
2h 25mnonstop
United Airlines Logo
7:55 pm - 9:36 pm
ORD
-
RAP
2h 41mnonstop
$209United Airlines
Wed, Apr 1 - Wed, Apr 8
United Airlines Logo
5:41 pm - 11:52 pm
RAP
-
ORD
5h 11m1 stop
United Airlines Logo
7:55 pm - 9:36 pm
ORD
-
RAP
2h 41mnonstop
$219United Airlines
Tue, Mar 24 - Sun, Apr 12
Delta Logo
4:10 pm - 9:30 pm
RAP
-
ORD
4h 20m1 stop
Delta Logo
6:15 am - 10:11 am
ORD
-
RAP
4h 56m1 stop
$229Delta
Wed, Feb 4 - Wed, Feb 11
Delta Logo
6:00 am - 1:06 pm
RAP
-
MDW
6h 06m1 stop
Delta Logo
7:16 pm - 10:28 pm
MDW
-
RAP
4h 12m1 stop
$229Delta
Wed, Feb 4 - Wed, Feb 11
Delta Logo
4:10 pm - 9:30 pm
RAP
-
ORD
4h 20m1 stop
Delta Logo
1:58 pm - 10:28 pm
ORD
-
RAP
9h 30m2 stops
$234Delta
Wed, Feb 4 - Wed, Feb 11
American Airlines Logo
6:00 am - 3:37 pm
RAP
-
ORD
8h 37m1 stop
American Airlines Logo
8:10 am - 1:34 pm
ORD
-
RAP
6h 24m1 stop
$249American Airlines
Tue, Jan 20 - Tue, Jan 27
American Airlines Logo
2:21 pm - 10:24 pm
RAP
-
ORD
7h 03m1 stop
American Airlines Logo
9:40 am - 11:14 am
ORD
-
RAP
2h 34mnonstop
$260American Airlines
Wed, Apr 1 - Wed, Apr 8
American Airlines Logo
4:54 pm - 11:04 pm
RAP
-
STL
5h 10m1 stop
American Airlines Logo
7:05 am - 11:14 am
STL
-
RAP
5h 09m1 stop
$339American Airlines
Thu, May 7 - Tue, May 19
United Airlines Logo
12:25 pm - 9:40 pm
RAP
-
STL
8h 15m2 stops
United Airlines Logo
9:55 am - 6:54 pm
STL
-
RAP
9h 59m2 stops
$340United Airlines
Wed, Feb 25 - Sat, Feb 28
United Airlines Logo
2:40 pm - 8:58 pm
RAP
-
STL
5h 18m1 stop
United Airlines Logo
8:45 am - 1:12 pm
STL
-
RAP
5h 27m1 stop
$349United Airlines
Tue, Jan 20 - Sat, Jan 24

United Airlines flights from Rapid City to Illinois

Our best United Airlines deals on Rapid City to Illinois flight tickets
United Airlines
Apr 1
RAP9:20 amRapid City
2h 25m
ORD12:45 pmChicago O'Hare Intl
Apr 8
ORD7:55 pmChicago O'Hare Intl
2h 41m
RAP9:36 pmRapid City
$209
United Airlines
Mar 24
RAP5:41 pmRapid City
5h 11m
1 stop
ORD11:52 pmChicago O'Hare Intl
Apr 12
ORD7:55 pmChicago O'Hare Intl
2h 41m
RAP9:36 pmRapid City
$219
United Airlines
Jan 24
RAP5:10 amRapid City
5h 24m
1 stop
ORD11:34 amChicago O'Hare Intl
Jan 28
ORD7:00 amChicago O'Hare Intl
7h 12m
1 stop
RAP1:12 pmRapid City
$319

Delta flights from Rapid City to Illinois

Our best Delta deals on Rapid City to Illinois flight tickets
Delta
Feb 4
RAP4:10 pmRapid City
4h 20m
1 stop
ORD9:30 pmChicago O'Hare Intl
Feb 11
ORD6:15 amChicago O'Hare Intl
4h 56m
1 stop
RAP10:11 amRapid City
$229
Delta
Feb 4
RAP4:10 pmRapid City
4h 20m
1 stop
ORD9:30 pmChicago O'Hare Intl
Feb 11
ORD1:58 pmChicago O'Hare Intl
9h 30m
2 stops
RAP10:28 pmRapid City
$234
Delta
Feb 4
RAP10:54 amRapid City
9h 11m
2 stops
ORD9:05 pmChicago O'Hare Intl
Feb 11
ORD1:58 pmChicago O'Hare Intl
9h 30m
2 stops
RAP10:28 pmRapid City
$240

momondo Fare Finder

 
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, momondo users made 832,500 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Rapid City to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Wed 4/1

9:20 am-12:45 pm

Nonstop2h 25m

Chicago O'Hare Intl

Wed 4/8

7:55 pm-9:36 pm

Nonstop2h 41m

$209

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Tue 3/24

5:41 pm-11:52 pm

1 stop5h 11m

Chicago O'Hare Intl

Sun 4/12

7:55 pm-9:36 pm

Nonstop2h 41m

$219

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Wed 2/4

4:10 pm-9:30 pm

1 stop4h 20m

Chicago O'Hare Intl

Wed 2/11

6:15 am-10:11 am

1 stop4h 56m

$229

Rapid CityChicago

RAP - MDW

RAPMDW

Rapid City

Wed 2/4

6:00 am-1:06 pm

1 stop6h 06m

Chicago Midway

Wed 2/11

7:16 pm-10:28 pm

1 stop4h 12m

$229

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Wed 2/4

4:10 pm-9:30 pm

1 stop4h 20m

Chicago O'Hare Intl

Wed 2/11

1:58 pm-10:28 pm

2 stops9h 30m

$234

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Tue 1/20

6:00 am-3:37 pm

1 stop8h 37m

Chicago O'Hare Intl

Tue 1/27

8:10 am-1:34 pm

1 stop6h 24m

$249

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Wed 4/1

2:21 pm-10:24 pm

1 stop7h 03m

Chicago O'Hare Intl

Wed 4/8

9:40 am-11:14 am

Nonstop2h 34m

$260

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Thu 5/7

4:54 pm-11:04 pm

1 stop5h 10m

Lambert-St Louis

Tue 5/19

7:05 am-11:14 am

1 stop5h 09m

$339

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Wed 2/25

12:25 pm-9:40 pm

2 stops8h 15m

Lambert-St Louis

Sat 2/28

9:55 am-6:54 pm

2 stops9h 59m

$340

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Tue 1/20

2:40 pm-8:58 pm

1 stop5h 18m

Lambert-St Louis

Sat 1/24

8:45 am-1:12 pm

1 stop5h 27m

$349

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Illinois from

How to get the cheapest flight ticket from Rapid City to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Rapid City is in January. Flight prices, which tend to average around $273, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $289.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Rapid City to Illinois is on a Tuesday when prices can be found for as low as $446. Flights from Rapid City to Illinois on a Monday will generally be more expensive and average around $601. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Rapid City to Illinois during this time can be as low as $411. Flights at noon are often more expensive with an average ticket price of $494.

What is the cheapest Rapid City to Illinois flight route?

Fly from Rapid City to Chicago O'Hare Intl for the best Rapid City - Illinois flight prices

What cabin class options are available on Rapid City to Illinois flights?

There are 4 cabin classes available to choose from on Rapid City to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Rapid City to Illinois flights?

You could potentially save up to 76% on your flight if you consider stops on a Rapid City to Illinois flight.

Cheap Rapid City to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Rapid City to Illinois

Best Price Found

$261

Fastest flight time

2h 13m

Direct flights

Mon, Tue, Thu, Sat and Sun

Airports in Illinois

98 airports
The best one-way flight to Illinois from Rapid City in the past 72 hours is $261. The best round-trip flight deal from Rapid City to Illinois found on momondo in the last 72 hours is $398.
The fastest flight from Rapid City to Illinois takes 2h 13m
Direct flights go from Rapid City to Illinois on Monday, Tuesday, Thursday, Saturday and Sunday. There are no airlines offering direct flights.
There are 98 airports in Illinois. From Rapid City there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

  • When did momondo last update prices for flights from Rapid City Airport to Illinois?

    Prices for flights from Rapid City Airport to Illinois are refreshed on a daily basis.

  • How many operators does momondo search for flights from Rapid City Airport to Illinois?

  • How old do you have to be to fly from Rapid City Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Rapid City Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Rapid City to Illinois?

Best airlines flying from Rapid City to Illinois

Compare and see reviews for airlines that fly from Rapid City to Illinois with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $189Free CancellationRating
7.2
11,095 reviews
Search American Airlines flights
United AirlinesPriceFrom $210Free CancellationRating
7.4
9,139 reviews
Search United Airlines flights
DeltaPriceFrom $228Free CancellationRating
7.9
8,025 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Rapid City to Illinois?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from Rapid City.

Can I find flights from Rapid City to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Rapid City which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Rapid City to Illinois?

Once all potential Rapid City to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Rapid City to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Rapid City. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 2/7
Sat 2/14
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo
Flights to New Yorkfrom $49
Flights to Los Angelesfrom $38
Flights to Miamifrom $32
Flights to Chicagofrom $58
Flights to Orlandofrom $55
Flights to San Franciscofrom $49
Flights to Las Vegasfrom $55
Flights to Washington, D.C.from $58
Flights to Bostonfrom $58
Flights to Atlantafrom $48
Flights to Dallasfrom $57
Flights to Seattlefrom $57