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$84+ 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$176
(Cheapflightsfares)

One-way from

$84
(FlightHub)

Popular in

March

Cheapest in

August

Average price

$256

Good round-trip deal

$273 or less

Good one-way deal

$160 or less
Provider with most accurate pricing for Raleigh-Durham-Chicago (CHI) flight deals.
Search Deals
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. 21% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Price to beat on a round-trip flight from Raleigh-Durham to Illinois.
Search Deals
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 May 1, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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.
Sat 5/313:06 pmRDU - ORD
1 stop5h 42mFrontier
Mon 6/211:32 amORD - RDU
Nonstop2h 07mFrontier
Deal found 4/30$176
This CheapOair deal was found by Cheapflights users on 5/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/73:26 pmRDU - ORD
Nonstop2h 25mMultiple Airlines
Sun 8/108:00 amORD - RDU
1 stop10h 48mMultiple Airlines
Deal found 5/1$177
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 5/289:20 amRDU - ORD
Nonstop2h 24mUnited Airlines
Sat 5/316:28 pmORD - RDU
Nonstop2h 07mUnited Airlines
Deal found 4/30$179
This Cheapflightsfares deal was found by Cheapflights users on 5/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/58:50 amRDU - ORD
1 stop6h 16mSpirit Airlines
Sun 6/87:35 pmORD - RDU
1 stop12h 37mSpirit Airlines
Deal found 5/1$181
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 5/286:00 amRDU - ORD
Nonstop2h 21mAmerican Airlines
Wed 5/2810:56 amORD - RDU
Nonstop2h 05mAmerican Airlines
Deal found 4/30$184
This Southwest deal was found by Cheapflights users on 4/30. 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.
Wed 5/286:15 amRDU - MDW
Nonstop2h 05mSouthwest
Wed 5/286:30 pmMDW - RDU
Nonstop1h 50mSouthwest
Deal found 4/30$189
This Delta deal was found by Cheapflights users on 4/30. 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 6/1411:08 amRDU - ORD
1 stop4h 39mDelta
Tue 6/247:05 amORD - RDU
1 stop3h 59mDelta
Deal found 4/30$197
This Delta deal was found by Cheapflights users on 4/29. 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 6/145:20 amRDU - MDW
1 stop5h 21mDelta
Tue 6/241:09 pmMDW - RDU
1 stop3h 29mDelta
Deal found 4/29$197
This Frontier deal was found by Cheapflights users on 4/30. 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.
Sat 5/245:42 pmRDU - MDW
1 stop5h 20mFrontier
Wed 5/286:40 amMDW - RDU
1 stop11h 19mFrontier
Deal found 4/30$198
This Sun Country Air deal was found by Cheapflights users on 4/30. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/185:25 pmRDU - ORD
1 stop26h 44mSun Country Air
Fri 5/236:12 pmORD - RDU
1 stop15h 36mSun Country Air
Deal found 4/30$235
This American Airlines deal was found by Cheapflights users on 4/30. 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 6/77:08 pmRDU - PIA
1 stop5h 11mAmerican Airlines
Tue 6/104:43 pmPIA - RDU
1 stop7h 09mAmerican Airlines
Deal found 4/30$249
This Delta deal was found by Cheapflights users on 4/29. 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.
Fri 6/1311:08 amRDU - MLI
1 stop6h 39mDelta
Wed 6/185:55 amMLI - RDU
1 stop6h 13mDelta
Deal found 4/29$249

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 May 1, 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

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Sat 5/31

3:06 pm-7:48 pm

1 stop5h 42m

Chicago O'Hare Intl

Mon 6/2

11:32 am-2:39 pm

Nonstop2h 07m

$176

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Thu 8/7

3:26 pm-4:51 pm

Nonstop2h 25m

Chicago O'Hare Intl

Sun 8/10

8:00 am-7:48 pm

1 stop10h 48m

$177

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Wed 5/28

9:20 am-10:44 am

Nonstop2h 24m

Chicago O'Hare Intl

Sat 5/31

6:28 pm-9:35 pm

Nonstop2h 07m

$179

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Thu 6/5

8:50 am-2:06 pm

1 stop6h 16m

Chicago O'Hare Intl

Sun 6/8

7:35 pm-9:12 am

1 stop12h 37m

$181

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Wed 5/28

6:00 am-7:21 am

Nonstop2h 21m

Chicago O'Hare Intl

Wed 5/28

10:56 am-2:01 pm

Nonstop2h 05m

$184

RaleighChicago

RDU - MDW

RDUMDW

Raleigh-Durham

Wed 5/28

6:15 am-7:20 am

Nonstop2h 05m

Chicago Midway

Wed 5/28

6:30 pm-9:20 pm

Nonstop1h 50m

$189

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Sat 6/14

11:08 am-2:47 pm

1 stop4h 39m

Chicago O'Hare Intl

Tue 6/24

7:05 am-12:04 pm

1 stop3h 59m

$197

RaleighChicago

RDU - MDW

RDUMDW

Raleigh-Durham

Sat 6/14

5:20 am-9:41 am

1 stop5h 21m

Chicago Midway

Tue 6/24

1:09 pm-5:38 pm

1 stop3h 29m

$197

RaleighChicago

RDU - MDW

RDUMDW

Raleigh-Durham

Sat 5/24

5:42 pm-10:02 pm

1 stop5h 20m

Chicago Midway

Wed 5/28

6:40 am-6:59 pm

1 stop11h 19m

$198

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Sun 5/18

5:25 pm-7:09 pm

1 stop26h 44m

Chicago O'Hare Intl

Fri 5/23

6:12 pm-10:48 am

1 stop15h 36m

$235

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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, 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 May 1, 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.

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 May 1, 2025.

The most flights from RDU to USIL are scheduled on a Thursday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 on average).

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 May 1, 2025.
To help decide which airline to fly from Raleigh to Illinois, see what other customers have to say about Southwest, Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,294 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,294 reviews
Southwest
8.0
Very good
4,294 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Delta
8.0
Very good
7,934 reviews
Southwest
8.0
Very good
4,294 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
United Airlines
7.4
Good
8,696 reviews
Southwest
8.0
Very good
4,294 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
JetBlue
7.3
Good
2,924 reviews
Southwest
8.0
Very good
4,294 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,294 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Crew

8.6

Food

7.1

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

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 Spirit Airlines. According to our data, you can fly for as low as $84. Users have also found prices from $85 and $85 on United Airlines and Southwest, 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%), Republic Airways (88%) or ANA (85%) 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 $80. While the most popular route (Raleigh-Durham - Chicago O'Hare Intl) can be booked for $132 on average our data indicates $928 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$38Average$143FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$98Average$263FlexibilityNo cancel feeOn-time65%
DeltaCheapest$102Average$390FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$140Average$336FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$146Average$395FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$162Average$331FlexibilityNo cancel feeOn-time63%

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