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$54+ 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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Feb 17 — Feb 241
Tue 2/17
Tue 2/24
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 January 18, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$131
(Kiwi.com)

One-way from

$54
(Super.com)

Popular in

March

Cheapest in

August

Average price

$299

Good round-trip deal

$290 or less

Good one-way deal

$148 or less
Provider with most accurate pricing for Raleigh-Durham-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Raleigh-Durham-Chicago (CHI) flights.
Search Deals
From Raleigh-Durham to Illinois
Search Deals
One-way flight from Raleigh-Durham to Illinois
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
Tue 2/179:25 pm
RDU
-
STL
1 stop26h 02m
Frontier
Tue 2/243:49 pm
STL
-
RDU
1 stop21h 09m
Frontier
Deal found 1/18$131
This Kiwi.com deal was found by Cheapflights users on 1/17. 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.
Fri 2/276:54 pm
RDU
-
STL
1 stop12h 57m
Frontier
Mon 3/28:22 pm
STL
-
RDU
1 stop26h 48m
Frontier
Deal found 1/17$132
This Kiwi.com deal was found by Cheapflights users on 1/17. 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.
Thu 2/266:55 pm
RDU
-
STL
1 stop12h 56m
Frontier
Mon 3/28:22 pm
STL
-
RDU
1 stop26h 48m
Frontier
Deal found 1/17$133
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
Mon 2/2310:07 pm
RDU
-
ORD
Nonstop2h 30m
Multiple Airlines
Thu 2/265:58 pm
ORD
-
RDU
2 stops23h 01m
Multiple Airlines
Deal found 1/16$138
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
Thu 2/266:55 pm
RDU
-
ORD
1 stop28h 44m
Frontier
Tue 3/36:02 pm
ORD
-
RDU
1 stop5h 08m
Frontier
Deal found 1/16$139
This Kiwi.com deal was found by Cheapflights users on 1/15. 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.
Fri 2/276:10 am
RDU
-
ORD
2 stops13h 08m
Multiple Airlines
Mon 3/26:19 pm
ORD
-
RDU
Nonstop2h 03m
Multiple Airlines
Deal found 1/15$140
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
Tue 2/176:08 pm
RDU
-
ORD
1 stop16h 14m
Multiple Airlines
Wed 2/1811:51 am
ORD
-
RDU
1 stop6h 44m
Multiple Airlines
Deal found 1/16$141
This Kiwi.com deal was found by Cheapflights users on 1/15. 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.
Thu 2/126:05 am
RDU
-
MDW
1 stop17h 29m
Frontier
Mon 2/166:00 am
MDW
-
RDU
1 stop17h 10m
Frontier
Deal found 1/15$141
This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
Tue 2/176:08 pm
RDU
-
ORD
1 stop16h 14m
Multiple Airlines
Tue 2/2411:51 am
ORD
-
RDU
1 stop11h 19m
Multiple Airlines
Deal found 1/18$142
This Kiwi.com deal was found by Cheapflights users on 1/17. 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 2/710:42 am
RDU
-
ORD
1 stop6h 58m
Frontier
Tue 2/106:07 pm
ORD
-
RDU
1 stop5h 03m
Frontier
Deal found 1/17$143
This Frontier deal was found by Cheapflights users on 1/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/116:25 am
RDU
-
ORD
1 stop5h 49m
Frontier
Thu 2/127:00 am
ORD
-
RDU
1 stop9h 55m
Frontier
Deal found 1/16$144
This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
Fri 2/2010:47 am
RDU
-
ORD
1 stop22h 07m
Multiple Airlines
Sun 2/225:05 am
ORD
-
RDU
1 stop18h 05m
Multiple Airlines
Deal found 1/18$145

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 January 18, 2026.
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

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Thu 2/26

6:15 am-11:54 am

1 stop6h 39m

Chicago O'Hare Intl

Sat 2/28

10:00 am-5:38 pm

1 stop6h 38m

$161

RaleighChicago

RDU - MDW

RDUMDW

Raleigh-Durham

Tue 2/3

7:10 am-12:05 pm

1 stop5h 55m

Chicago Midway

Wed 2/4

1:20 pm-11:51 pm

1 stop9h 31m

$161

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Tue 2/24

3:26 pm-10:59 pm

1 stop8h 33m

Chicago O'Hare Intl

Thu 3/5

6:04 am-2:47 pm

1 stop7h 43m

$161

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Sun 3/1

6:15 am-12:04 pm

1 stop6h 49m

Chicago O'Hare Intl

Wed 3/4

10:00 am-5:38 pm

1 stop6h 38m

$174

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Thu 3/12

6:15 am-11:25 am

1 stop6h 10m

Chicago O'Hare Intl

Wed 3/18

6:44 am-3:38 pm

1 stop7h 54m

$174

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 2/13

6:54 pm-6:51 am

1 stop12h 57m

Lambert-St Louis

Fri 2/20

8:20 pm-12:10 am

1 stop26h 50m

$196

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Fri 3/13

4:37 pm-10:56 pm

1 stop7h 19m

Chicago O'Hare Intl

Mon 3/16

6:44 am-3:38 pm

1 stop7h 54m

$204

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sat 1/31

10:42 am-11:33 pm

1 stop13h 51m

Lambert-St Louis

Sun 2/1

5:42 pm-9:01 pm

1 stop26h 19m

$207

RaleighEvansville

RDU - EVV

RDUEVV

Raleigh-Durham

Fri 2/20

1:12 pm-7:06 pm

1 stop6h 54m

Evansville Dress Regional

Fri 2/27

7:46 pm-10:03 am

1 stop13h 17m

$208

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Tue 3/24

4:37 pm-10:56 pm

1 stop7h 19m

Chicago O'Hare Intl

Sun 3/29

6:45 am-3:19 pm

1 stop7h 34m

$213

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/17

Showing 1-10 of 60 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, January is the cheapest month in which you can book a flight from Raleigh to Illinois (average of $58). Flying from Raleigh to Illinois in March is currently the most expensive (average of $199). 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 January 18, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 28% on flights from Raleigh to Illinois by exploring options for tickets in the evening.

What is the cheapest day to fly from Raleigh to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Raleigh to Illinois. Price data was last updated on January 10, 2026.

Travelers seeking maximum savings on their Raleigh to Illinois flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Raleigh to Illinois

Explore weekly flight availability from Raleigh to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 18, 2026.

The most flights from RDU to USIL are scheduled on a Monday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (16 on average).

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 January 18, 2026.
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
4,261 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,261 reviews
Southwest
8.0
Very good
4,261 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,075 reviews
Southwest
8.0
Very good
4,261 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,174 reviews
Southwest
8.0
Very good
4,261 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,155 reviews
Southwest
8.0
Very good
4,261 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,057 reviews
Southwest
8.0
Very good
4,261 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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.

  • How long is the flight from Raleigh to Illinois?

    There are many flights that can get you from Raleigh to Illinois in 2h 05m. Fly via JetBlue, Frontier, or Southwest to get the fastest option. Raleigh and Illinois are separated by a distance of 631 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $36. Users have also found prices from $74 and $78 on American Airlines and Spirit 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 Cathay Pacific (90%), Envoy Air (88%) or Qatar Airways (83%) 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 $88. While the most popular route (Raleigh-Durham - Chicago O'Hare Intl) can be booked for $108 on average, our data indicates $622 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, January is the cheapest month in which you can book a flight from Raleigh to Illinois (average of $58). Flying from Raleigh to Illinois in March is currently the most expensive (average of $199). 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 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 January 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$69Average$186FlexibilityNo cancel feeOn-time62%
DeltaCheapest$88Average$307FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$151Average$325FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$160Average$293FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$173Average$414FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$177Average$314FlexibilityNo cancel feeOn-time63%

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