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Illinois

$59+ Cheap flights from Raleigh (RDU) 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Raleigh to Illinois

Keep the following information in mind while searching for Raleigh to Illinois flight deals. Data was last updated July 3, 2025.

Round-trip from

$119
(Priceline)

One-way from

$59
(Priceline)

Popular in

March

Cheapest in

August

Average price

$198

Good round-trip deal

$221 or less

Good one-way deal

$121 or less
From Raleigh-Durham to Illinois
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One-way flight from Raleigh-Durham to Illinois
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Highest demand for flights based on searches. 20% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Raleigh-Durham to Illinois.
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Price to beat on a one-way flight from Raleigh-Durham to Illinois.
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Find flight deals from Raleigh to Illinois

Cheapest flights from Raleigh to Illinois
Explore the most affordable flight options available from Raleigh to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/307:30 amRDU - STL
1 stop7h 03mFrontier
Mon 9/12:01 pmSTL - RDU
1 stop7h 27mFrontier
Deal found 7/2$119
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/194:44 pmRDU - ORD
1 stop7h 45mFrontier
Mon 8/1111:15 amORD - RDU
Nonstop2h 13mFrontier
Deal found 7/1$161
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/105:15 pmRDU - MDW
1 stop7h 02mFrontier
Mon 7/146:20 amMDW - RDU
1 stop8h 52mFrontier
Deal found 7/2$164
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/159:27 amRDU - STL
1 stop5h 05mMultiple Airlines
Mon 8/185:40 pmSTL - RDU
1 stop6h 04mMultiple Airlines
Deal found 7/2$169
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/229:27 amRDU - STL
1 stop5h 05mSpirit Airlines
Sun 8/2410:37 amSTL - RDU
1 stop7h 14mSpirit Airlines
Deal found 7/2$173
This Orbitz deal was found by Cheapflights users on 7/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:33 pmRDU - ORD
1 stop6h 37mMultiple Airlines
Sun 9/1410:18 amORD - RDU
1 stop9h 36mMultiple Airlines
Deal found 7/1$175
This United Airlines deal was found by Cheapflights users on 7/3. 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 8/121:28 pmRDU - ORD
Nonstop2h 24mUnited Airlines
Wed 8/132:08 pmORD - RDU
Nonstop2h 08mUnited Airlines
Deal found 7/3$177
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/217:00 amRDU - MDW
Nonstop1h 55mSouthwest
Sun 8/2410:00 amMDW - RDU
Nonstop1h 55mSouthwest
Deal found 7/2$177
This American Airlines deal was found by Cheapflights users on 7/2. 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.
Sat 8/163:32 pmRDU - ORD
Nonstop2h 34mAmerican Airlines
Sat 8/231:30 pmORD - RDU
Nonstop1h 56mAmerican Airlines
Deal found 7/2$178
This Cheapflightsfares deal was found by Cheapflights users on 7/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/199:23 amRDU - ORD
1 stop9h 16mSpirit Airlines
Mon 9/225:05 amORD - RDU
1 stop8h 30mSpirit Airlines
Deal found 7/3$182
This Delta deal was found by Cheapflights users on 7/3. 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 8/125:20 amRDU - ORD
1 stop4h 17mDelta
Sat 8/165:45 amORD - RDU
1 stop7h 16mDelta
Deal found 7/3$197
This Delta deal was found by Cheapflights users on 7/3. 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 8/163:06 pmRDU - MDW
1 stop7h 06mDelta
Sun 8/176:04 amMDW - RDU
1 stop4h 11mDelta
Deal found 7/3$197

Cheapflights Fare Finder

Customize your flight search to find flights from Raleigh 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 July 3, 2025.
Use the filters below to find and compare flights from Raleigh to Illinois that are best for you.

Fly from

Raleigh

Fly to

Illinois

Route

Depart

Return

Price

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sat 8/30

7:30 am-1:33 pm

1 stop7h 03m

Lambert-St Louis

Mon 9/1

2:01 pm-10:28 pm

1 stop7h 27m

$119

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Sat 7/19

4:44 pm-11:29 pm

1 stop7h 45m

Chicago O'Hare Intl

Mon 8/11

11:15 am-2:28 pm

Nonstop2h 13m

$161

RaleighChicago

RDU - MDW

RDUMDW

Raleigh-Durham

Thu 7/10

5:15 pm-11:17 pm

1 stop7h 02m

Chicago Midway

Mon 7/14

6:20 am-4:12 pm

1 stop8h 52m

$164

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 8/15

9:27 am-1:32 pm

1 stop5h 05m

Lambert-St Louis

Mon 8/18

5:40 pm-12:44 am

1 stop6h 04m

$169

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 8/22

9:27 am-1:32 pm

1 stop5h 05m

Lambert-St Louis

Sun 8/24

10:37 am-6:51 pm

1 stop7h 14m

$173

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Thu 9/11

6:33 pm-12:10 am

1 stop6h 37m

Chicago O'Hare Intl

Sun 9/14

10:18 am-8:54 pm

1 stop9h 36m

$175

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Tue 8/12

1:28 pm-2:52 pm

Nonstop2h 24m

Chicago O'Hare Intl

Wed 8/13

2:08 pm-5:16 pm

Nonstop2h 08m

$177

RaleighChicago

RDU - MDW

RDUMDW

Raleigh-Durham

Thu 8/21

7:00 am-7:55 am

Nonstop1h 55m

Chicago Midway

Sun 8/24

10:00 am-12:55 pm

Nonstop1h 55m

$177

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Sat 8/16

3:32 pm-5:06 pm

Nonstop2h 34m

Chicago O'Hare Intl

Sat 8/23

1:30 pm-4:26 pm

Nonstop1h 56m

$178

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Fri 9/19

9:23 am-5:39 pm

1 stop9h 16m

Chicago O'Hare Intl

Mon 9/22

5:05 am-2:35 pm

1 stop8h 30m

$182

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 55 results
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Best time to book a flight from Raleigh to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Raleigh 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 Raleigh to Illinois

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

Currently, August is the cheapest month in which you can book a flight from Raleigh to Illinois (average of $245). Flying from Raleigh 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.

What is the cheapest time of day to fly from RDU to IL?

Find hourly flight availability from Raleigh to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

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

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 July 3, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Raleigh to Illinois. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,086 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Overall

8.0

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

Find useful and relevant information for your journey from Raleigh 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 Raleigh to Illinois?

    Most people fly from Raleigh-Durham (RDU) if they book a flight from Raleigh to Illinois. Raleigh-Durham is conveniently located just 11.1 mi from Raleigh’s city center.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $59. Users have also found prices from $64 and $89 on Spirit Airlines and United Airlines, respectively.

  • What are the most popular routes from Raleigh to Illinois?

    The most popular route from Raleigh to Illinois is Raleigh-Durham - Chicago O'Hare Intl. You may also consider Raleigh-Durham - Chicago Midway or Raleigh-Durham - Lambert-St Louis.

  • What are the most reliable airlines from Raleigh to Illinois?

    No one likes to see their flight delayed. When booking a flight from Raleigh to Illinois consider choosing SkyWest Airlines (100%), Japan Airlines (93%) or SWISS (93%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Raleigh to Illinois?

    Looking at all options, your cheapest flight can be booked for $97. While the most popular route (Raleigh-Durham - Chicago O'Hare Intl) can be booked for $108 on average our data indicates $1,852 when flying from Raleigh to Illinois.

  • Can I find deals for flights from Raleigh to Illinois that include hotel bookings?

    Yes. In addition to deals on Raleigh to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Raleigh to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Raleigh to Illinois.

  • Can I find deals for business class flights from Raleigh to Illinois?

    Yes. Cheapflights offers flight deals from Raleigh 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 Raleigh to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Raleigh to Illinois (average of $245). Flying from Raleigh 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 Raleigh to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Raleigh to Illinois

Discover the top 6 airlines that operate flights from Raleigh 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$43Average$162FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$98Average$263FlexibilityNo cancel feeOn-time65%
DeltaCheapest$102Average$367FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$145Average$346FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$147Average$390FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$170Average$314FlexibilityNo cancel feeOn-time63%

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