$134 Find Cheap Flights from Rapid City to Illinois - Compare and Save

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KAYAK's insights & trends for Rapid City to Illinois flights

Get data-powered insights and trends into flights from Rapid City to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Rapid City to Illinois?

Flight prices are below average for this route right now.

Flights to Illinois from Rapid City usually cost between $416 and $528 in December.
The lowest price found in the past 5 days was $321 on Delta (Dec 5-Dec 8).

What is the cheapest Rapid City to Illinois flight route?

The cheapest ticket to Illinois from Rapid City found in the last 5 days was to Chicago, at $359 round-trip. The most popular route is from Rapid City (RAP) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $359.

What is the cheapest time of day to fly to Illinois?

The cheapest time of day to fly to Illinois is generally in the evening, when round-trip flights cost $484 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $548.

Can I save money by flying with a layover from Rapid City to Illinois?

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $395 on average.

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

The cheapest month for flights from Rapid City to Illinois is April, when tickets cost $209 (return) on average. On the other hand, the most expensive months are December and January, when the average cost of round-trip tickets is $657 and $536 respectively.

What’s the cheapest day of the week to fly from Rapid City to Illinois?

If your flying dates are flexible, you should consider flying to Illinois on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Rapid City to Illinois. For your return ticket, we recommend flying on a Saturday and avoiding Mondays for the best deals.

Good to know

Low season

November

Cheapest flight

$134
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Rapid City to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Rapid City to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Rapid City to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Rapid City to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Rapid City to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Rapid City to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Rapid City to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Rapid City to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Rapid City to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Rapid City to the following destinations at these prices or less: Chicago $283 one-way - $449 round-trip

Reviews of the top airlines flying from Rapid City to Illinois

 
Need help choosing which airline to fly with from Rapid City to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
United AirlinesOverall score based on 10463 reviews
7.7Boarding
7.3Comfort
6.7Food
7.1Entertainment
8.1Crew
Airline reviews

Fine except from Chicago to moline three different gate changes and flight times

2.0 MediocreMiranda, Oct 2026
Read more United Airlines reviews

Fine except from Chicago to moline three different gate changes and flight times

When booking, the connection times seem fine. But in reality, my two connections were cut short by the first leg being delayed due to issues at the destination (too much traffic going into SFO, ORD) and it became extremely stressful.

Flight and crew were great. Need more legroom and do not allow seats to recline.

We arrived to Chicago nearly 30 minutes early, which was great, but then was on the ground for over an hour because the gate was not available. The issue I had was the pilot estimation was frustrating. First he said he was informed it would be 20 minutes but he said "it will probably be more like 10 minutes". After 30 minutes he came back on the comm and said it would be another 10 minutes, maybe 20. I understand he was only giving estimates but he also layered in his own gut feel. We were never told why we didn't have a gate even after our scheduled entry.

Just sat on the run way after we arrived early

Stored my cloth purse under seat in front off me as instructed. When I retrieved it, half of it was soaked, along with everything inside it. I don’t really know how that could have been prevented because the area did not look wet, but I was not happy about it.

Phx - ORD was nice 737 with starlink and the ORD - grr was ancient bare bones airbus with not even a power port lol

It was easy to board, and the staff was friendly and helpful. What could have been better is that I shouldn't have to pay extra for a seat that doesn't recline.

Was on the plane sitting longer than the actual flight in air was, boarded at 5:45p and didn't take off until 6:50p flight was only about 30 minutes long. Just was poor experience will booking more with American Airlines.

My flight was 3 hours late, which caused me to miss my connection in Denver. Further, this connecting flight was then Later canceled. This required me to stay another night an hour and a half away, and rent the rental car for an additional Night. I am still waiting for United Airlines to reimburse me for the inconvenience and Expense of having to extend my rental Car for An additional Day. See attached receipt. https://share.icloud.com/photos/0f5ns2AaeIr7w6t_uH1qfPBUg

Both flights were late leaving due to repairs/switching gates. The crew and pilots, however, were professional and courteous. Most importantly, we arrived at our destination safely. The seats were comforable. That size should be standard for all economy class. American could improve its boarding process. I am not sure why you need 9 groups for a small regional plane.

It was close to its perfect the flake could be took off early, landed early, didn’t have to wait for my daughter stroller luggage came out quick, very efficient, very good flight

The amount of gate changes and delays is completely unacceptable. This has happened on 3 of 4 trips between Chicago and Dallas in 2026.

The delay update was very late. I had a stressful short connection and RAN through Chicago to get to the next flight, only to find the plane wasn't at the gate yet an nobody was boarding. I would not have had to run if the delay was updated earlier.

No flight delays. No need to rebook to make connections. Enjoyed second leg of flight on Iberia.

Same the delay was not ideal and the credits to move flights was not sufficient

No food on 4.5 hour flight, wi-fi did not work. Terrible experience for a long haul flight.

The crew were diligent about ensuring that our pet dog remained in his carrier for the entire flight, as is their mandate. I wish that mandate was changed so that our poor, scared pets can be comforted during a flight, whereas service animals get to stay out and about for the whole flight. Thank you.

first leg from san diego to chicago, only had cookies for snack. 1 flavor of sparkling water chicago to washington dc had option of cookies, pretzels, or gold fish. had 2 flavors of sparkling water. 2nd flight better however the best part was there was no delays!!! Got to chicago and washington dc early. That was wonderful!!!!

Other than being delayed 5.5 hours and having to get a hotel because I missed my connecting flight, it was an okay flight. No in-flight Wi-Fi or entertainment.

More options for your flight from Rapid City to Illinois

Complete your trip to Illinois with a hotel stay or car rental