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$68+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Mar 8 — Mar 151
Sat 3/8
Sat 3/15
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 March 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$136
(Mytrip)

One-way from

$68
(Mytrip)

Popular in

December

Cheapest in

August

Average price

$325

Good round-trip deal

$346 or less

Good one-way deal

$169 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. 15% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 3, 2025.

This Mytrip deal was found by Cheapflights users on 3/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2411:29 amRDU - STL
1 stop6h 46mSpirit Airlines
Sun 4/276:10 pmSTL - RDU
1 stop22h 54mSpirit Airlines
Deal found 3/2$136
This CheapOair deal was found by Cheapflights users on 3/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2510:03 amRDU - STL
1 stop14h 46mFrontier
Thu 3/275:24 pmSTL - RDU
1 stop19h 46mFrontier
Deal found 3/2$160
This Mytrip deal was found by Cheapflights users on 3/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/310:58 amRDU - STL
1 stop7h 54mMultiple Airlines
Sun 4/612:37 pmSTL - RDU
1 stop26h 58mMultiple Airlines
Deal found 3/2$174
This Mytrip deal was found by Cheapflights users on 3/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/109:34 pmRDU - ORD
1 stop12h 33mSpirit Airlines
Tue 3/113:45 pmORD - RDU
2 stops19h 10mSpirit Airlines
Deal found 3/3$196
This CheapOair deal was found by Cheapflights users on 3/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/126:25 amRDU - MDW
1 stop11h 30mFrontier
Wed 3/195:58 pmMDW - RDU
1 stop4h 56mFrontier
Deal found 3/3$197
This CheapOair deal was found by Cheapflights users on 3/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/163:01 pmRDU - ORD
Nonstop2h 20mFrontier
Sun 5/181:01 pmORD - RDU
Nonstop2h 04mFrontier
Deal found 3/2$198
This United Airlines deal was found by Cheapflights users on 3/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/156:05 amRDU - PIA
1 stop5h 07mUnited Airlines
Tue 4/222:32 pmPIA - RDU
1 stop6h 00mUnited Airlines
Deal found 3/1$199
This Mytrip deal was found by Cheapflights users on 3/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/164:42 pmRDU - ORD
2 stops14h 51mMultiple Airlines
Wed 4/236:51 amORD - RDU
1 stop10h 00mMultiple Airlines
Deal found 3/1$208
This American Airlines deal was found by Cheapflights users on 3/2. 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.
Tue 4/13:54 pmRDU - MLI
1 stop7h 22mAmerican Airlines
Mon 4/74:26 pmMLI - RDU
1 stop6h 32mAmerican Airlines
Deal found 3/2$224
This Mytrip deal was found by Cheapflights users on 3/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2411:29 amRDU - PIA
2 stops27h 49mMultiple Airlines
Sun 4/276:07 pmPIA - RDU
1 stop22h 57mMultiple Airlines
Deal found 3/2$237
This United Airlines deal was found by Cheapflights users on 3/3. 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.
Thu 4/310:43 amRDU - MLI
2 stops7h 04mUnited Airlines
Wed 4/93:50 pmMLI - RDU
2 stops7h 07mUnited Airlines
Deal found 3/3$259
This Delta deal was found by Cheapflights users on 3/3. 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 4/222:07 pmRDU - ORD
1 stop10h 52mDelta
Wed 4/306:00 amORD - RDU
1 stop10h 10mDelta
Deal found 3/3$273

Find flights from Raleigh to Illinois within your budget

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 March 3, 2025.

Fly from

Raleigh

Fly to

Illinois

Route

Depart

Return

Price

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 4/24

11:29 am-5:15 pm

1 stop6h 46m

Lambert-St Louis

Sun 4/27

6:10 pm-6:04 pm

1 stop22h 54m

$136

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 3/25

10:03 am-11:49 pm

1 stop14h 46m

Lambert-St Louis

Thu 3/27

5:24 pm-2:10 pm

1 stop19h 46m

$160

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 4/3

10:58 am-5:52 pm

1 stop7h 54m

Lambert-St Louis

Sun 4/6

12:37 pm-4:35 pm

1 stop26h 58m

$174

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Mon 3/10

9:34 pm-9:07 am

1 stop12h 33m

Chicago O'Hare Intl

Tue 3/11

3:45 pm-11:55 am

2 stops19h 10m

$196

RaleighPeoria

RDU - PIA

RDUPIA

Raleigh-Durham

Tue 4/15

6:05 am-10:12 am

1 stop5h 07m

Greater Peoria

Tue 4/22

2:32 pm-9:32 pm

1 stop6h 00m

$199

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Thu 4/17

11:29 am-6:27 pm

1 stop7h 58m

Chicago O'Hare Intl

Sat 4/19

6:45 am-4:24 pm

1 stop8h 39m

$209

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Thu 5/22

3:01 pm-4:38 pm

Nonstop2h 37m

Chicago O'Hare Intl

Mon 5/26

5:10 am-4:08 pm

1 stop9h 58m

$211

RaleighChicago

RDU - ORD

RDUORD

Raleigh-Durham

Thu 5/8

4:50 pm-10:20 pm

1 stop6h 30m

Chicago O'Hare Intl

Tue 5/13

4:03 pm-11:46 pm

1 stop6h 43m

$219

RaleighChicago

RDU - MDW

RDUMDW

Raleigh-Durham

Thu 3/13

10:16 pm-7:35 pm

1 stop22h 19m

Chicago Midway

Tue 3/18

7:25 am-7:16 pm

1 stop10h 51m

$220

RaleighMoline

RDU - MLI

RDUMLI

Raleigh-Durham

Tue 4/1

3:54 pm-10:16 pm

1 stop7h 22m

Moline Quad-City

Mon 4/7

4:26 pm-11:58 pm

1 stop6h 32m

$224

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/2

Showing 1-10 of 53 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.

Travel insights for flights from Raleigh to Illinois

Get recent, data-driven insights about flights from Raleigh to Illinois including ideal travel times, pricing trends, and more.

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 $322). 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 March 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.

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 March 3, 2025.
To help decide which airline to fly from Raleigh to Illinois, see what other customers have to say about Southwest, Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,333 reviews

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest
8.1
Very good
4,333 reviews
Southwest
8.1
Very good
4,333 reviews

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Alaska Airlines
8.0
Very good
9,710 reviews
Southwest
8.1
Very good
4,333 reviews

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta
8.0
Very good
8,068 reviews
Southwest
8.1
Very good
4,333 reviews

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines
7.4
Good
8,679 reviews
Southwest
8.1
Very good
4,333 reviews

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

JetBlue
7.4
Good
3,008 reviews
Southwest
8.1
Very good
4,333 reviews

Boarding

8.2

Entertainment

7.6

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 $68. Users have also found prices from $75 and $129 on Frontier 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 Cathay Pacific (89%), Royal Jordanian (87%) or Republic Airways (87%) 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 $148. While the most popular route (Raleigh-Durham - Chicago O'Hare Intl) can be booked for $125 on average our data indicates $1,081 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 $322). 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 March 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$38Average$125FlexibilityNo cancel feeOn-time62%
DeltaCheapest$102Average$393FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$128Average$249FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$137Average$353FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$142Average$384FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$161Average$328FlexibilityNo cancel feeOn-time63%
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