$39+ 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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Mar 2 — Mar 91
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Raleigh to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Raleigh to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Raleigh to IllinoisExplore 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 31, 2026.
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 31, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:50 pm
RDU
- STL
1 stop13h 01m
Frontier
Fri 2/208:20 pm
STL
- RDU
1 stop26h 50m
Frontier
Deal found 1/29![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 1/31. 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.
Sun 2/86:10 am
RDU
- STL
1 stop25h 41m
Frontier
Mon 2/98:22 pm
STL
- RDU
1 stop26h 48m
Frontier
Deal found 1/31![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:10 am
RDU
- STL
1 stop25h 41m
Frontier
Mon 2/168:22 pm
STL
- RDU
1 stop26h 48m
Frontier
Deal found 1/29![Frontier logo]()
$136
This CheapOair deal was found by Cheapflights users on 1/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:54 pm
RDU
- STL
1 stop5h 33m
Frontier
Tue 3/33:49 pm
STL
- RDU
1 stop24h 10m
Frontier
Deal found 1/29![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 1/31. 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.
Sun 2/86:10 am
RDU
- STL
1 stop25h 41m
Frontier
Tue 2/103:49 pm
STL
- RDU
1 stop21h 09m
Frontier
Deal found 1/31![Frontier logo]()
$142
This Expedia deal was found by Cheapflights users on 1/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/176:20 am
RDU
- ORD
1 stop11h 37m
Frontier
Tue 2/246:02 pm
ORD
- RDU
1 stop5h 08m
Frontier
Deal found 1/29![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/136:10 am
RDU
- MDW
1 stop17h 15m
Frontier
Tue 2/176:00 am
MDW
- RDU
1 stop17h 10m
Frontier
Deal found 1/28![Frontier logo]()
$144
This Expedia deal was found by Cheapflights users on 1/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:08 pm
RDU
- ORD
1 stop7h 05m
Multiple Airlines
Thu 3/56:04 am
ORD
- RDU
1 stop7h 43m
Multiple Airlines
Deal found 1/29![Multiple Airlines logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/116:25 am
RDU
- MDW
1 stop13h 42m
Frontier
Sun 2/156:00 am
MDW
- RDU
1 stop17h 10m
Frontier
Deal found 1/29![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 1/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:25 pm
RDU
- ORD
1 stop6h 57m
Multiple Airlines
Mon 4/61:19 pm
ORD
- RDU
Nonstop2h 07m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$146
This CheapOair deal was found by Cheapflights users on 1/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/203:08 pm
RDU
- ORD
1 stop9h 39m
Multiple Airlines
Mon 2/236:19 pm
ORD
- RDU
Nonstop2h 03m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$148
This Frontier deal was found by Cheapflights users on 1/30. 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.
Thu 2/266:10 am
RDU
- MDW
1 stop11h 06m
Frontier
Mon 3/22:19 pm
MDW
- RDU
1 stop8h 51m
Frontier
Deal found 1/30![Frontier logo]()
$148
Best flights from Raleigh to IllinoisDiscover carefully curated flight deals from Raleigh to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 31, 2026.
Discover carefully curated flight deals from Raleigh to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 31, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/31. 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.
Sun 2/86:10 am
RDU
- STL
1 stop25h 41m
Frontier
Mon 2/98:22 pm
STL
- RDU
1 stop26h 48m
Frontier
Deal found 1/31![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 1/31. 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 3/246:25 pm
RDU
- ORD
1 stop6h 57m
Spirit Airlines
Sun 3/296:01 pm
ORD
- RDU
1 stop22h 28m
Spirit Airlines
Deal found 1/31![Spirit Airlines logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 1/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:08 pm
RDU
- ORD
1 stop7h 32m
Multiple Airlines
Sun 3/1510:55 am
ORD
- RDU
1 stop28h 02m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$185
This United Airlines deal was found by Cheapflights users on 1/28. 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 2/2410:00 am
RDU
- ORD
Nonstop2h 28m
United Airlines
Wed 2/2510:42 am
ORD
- RDU
Nonstop2h 02m
United Airlines
Deal found 1/28![United Airlines logo]()
$219
This Southwest deal was found by Cheapflights users on 1/30. 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 4/16:25 am
RDU
- MDW
1 stop6h 15m
Southwest
Sat 4/46:45 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 1/30![Southwest logo]()
$221
This Delta deal was found by Cheapflights users on 1/30. 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.
Fri 3/137:20 am
RDU
- BMI
1 stop4h 59m
Delta
Tue 3/174:04 pm
BMI
- RDU
1 stop4h 09m
Delta
Deal found 1/30![Delta logo]()
$269
This American Airlines deal was found by Cheapflights users on 1/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/125:00 am
RDU
- PIA
1 stop5h 20m
American Airlines
Mon 2/165:00 am
PIA
- RDU
1 stop5h 06m
American Airlines
Deal found 1/29![American Airlines logo]()
$279
This Frontier deal was found by Cheapflights users on 1/30. 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.
Thu 2/266:10 am
RDU
- MDW
1 stop11h 06m
Frontier
Mon 3/22:19 pm
MDW
- RDU
1 stop8h 51m
Frontier
Deal found 1/30![Frontier logo]()
$148
This CheapOair deal was found by Cheapflights users on 1/28. 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 4/305:14 pm
RDU
- ORD
Nonstop2h 29m
Multiple Airlines
Sun 5/37:05 am
ORD
- RDU
1 stop9h 58m
Multiple Airlines
Deal found 1/28![Multiple Airlines logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 1/30. 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 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 stop6h 22m
Frontier
Sun 2/156:15 am
MDW
- RDU
2 stops40h 55m
Frontier
Deal found 1/30![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 1/31. 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.
Sun 2/86:10 am
RDU
- STL
1 stop25h 41m
Multiple Airlines
Wed 2/118:17 pm
STL
- RDU
2 stops16h 56m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$195
This Southwest deal was found by Cheapflights users on 1/30. 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.
Sat 2/286:30 pm
RDU
- MDW
Nonstop2h 05m
Southwest
Sat 3/75:40 pm
MDW
- RDU
1 stop3h 45m
Southwest
Deal found 1/30![Southwest logo]()
$223
This United Airlines deal was found by Cheapflights users on 1/30. 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 4/11:15 pm
RDU
- ORD
Nonstop2h 34m
United Airlines
Sat 4/48:50 am
ORD
- RDU
Nonstop2h 10m
United Airlines
Deal found 1/30![United Airlines logo]()
$231
This Super.com deal was found by Cheapflights users on 1/30. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/264:07 pm
RDU
- ORD
1 stop7h 32m
Frontier
Sun 3/2912:34 pm
ORD
- RDU
Nonstop2h 03m
Frontier
Deal found 1/30![Frontier logo]()
$202
This United Airlines deal was found by Cheapflights users on 1/30. 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 4/11:15 pm
RDU
- ORD
Nonstop2h 34m
United Airlines
Tue 4/72:10 pm
ORD
- RDU
Nonstop2h 08m
United Airlines
Deal found 1/30![United Airlines logo]()
$231
This Southwest deal was found by Cheapflights users on 1/28. 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.
Tue 4/76:45 pm
RDU
- MDW
1 stop4h 05m
Southwest
Sat 4/117:50 am
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 1/28![Southwest logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 1/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/126:05 am
RDU
- ORD
1 stop5h 46m
Frontier
Sun 2/152:13 pm
ORD
- RDU
1 stop18h 39m
Frontier
Deal found 1/30![Frontier logo]()
$205
This American Airlines deal was found by Cheapflights users on 1/30. 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 2/145:00 am
RDU
- BMI
1 stop7h 01m
American Airlines
Wed 2/1811:31 am
BMI
- RDU
1 stop5h 09m
American Airlines
Deal found 1/30![American Airlines logo]()
$279
This United Airlines deal was found by Cheapflights users on 1/30. 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.
Tue 3/315:20 pm
RDU
- ORD
Nonstop2h 35m
United Airlines
Wed 4/14:20 pm
ORD
- RDU
1 stop6h 24m
United Airlines
Deal found 1/30![United Airlines logo]()
$241
This Southwest deal was found by Cheapflights users on 1/28. 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.
Tue 2/246:00 am
RDU
- MDW
Nonstop2h 15m
Southwest
Wed 2/251:25 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 1/28![Southwest logo]()
$245
This American Airlines deal was found by Cheapflights users on 1/30. 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.
Fri 2/133:47 pm
RDU
- MLI
1 stop8h 06m
American Airlines
Tue 2/176:00 am
MLI
- RDU
1 stop6h 02m
American Airlines
Deal found 1/30![American Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 1/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/236:25 pm
RDU
- MDW
1 stop19h 37m
Multiple Airlines
Thu 3/264:55 pm
MDW
- RDU
2 stops15h 10m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$255
This Trip.com deal was found by Cheapflights users on 1/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:48 am
RDU
- MDW
1 stop11h 24m
Frontier
Mon 3/166:00 am
MDW
- RDU
1 stop8h 57m
Frontier
Deal found 1/30![Frontier logo]()
$221
This Delta deal was found by Cheapflights users on 1/29. 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 3/137:20 am
RDU
- BMI
1 stop4h 59m
Delta
Mon 3/164:04 pm
BMI
- RDU
1 stop6h 12m
Delta
Deal found 1/29![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 1/30. 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.
Fri 4/107:45 pm
RDU
- MDW
Nonstop2h 00m
Southwest
Mon 4/132:40 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 1/30![Southwest logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 1/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:07 pm
RDU
- STL
1 stop15h 43m
Frontier
Sun 5/311:21 am
STL
- RDU
1 stop11h 54m
Frontier
Deal found 1/30![Frontier logo]()
$221
This United Airlines deal was found by Cheapflights users on 1/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1410:22 am
RDU
- PIA
1 stop7h 18m
United Airlines
Tue 3/172:20 pm
PIA
- RDU
1 stop5h 48m
United Airlines
Deal found 1/29![United Airlines logo]()
$269
This American Airlines deal was found by Cheapflights users on 1/30. 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 2/286:33 pm
RDU
- EVV
1 stop6h 20m
American Airlines
Tue 3/36:00 am
EVV
- RDU
1 stop6h 17m
American Airlines
Deal found 1/30![American Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 1/29. 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.
Thu 3/127:20 am
RDU
- BMI
1 stop4h 59m
Delta
Mon 3/164:04 pm
BMI
- RDU
1 stop4h 09m
Delta
Deal found 1/29![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 1/31. 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 4/2910:07 am
RDU
- MLI
1 stop4h 42m
United Airlines
Sat 5/23:47 pm
MLI
- RDU
1 stop4h 26m
United Airlines
Deal found 1/31![United Airlines logo]()
$269
Last-minute flights from Raleigh to IllinoisDiscover last-minute flight deals from Raleigh to Illinois. Data last updated January 31, 2026 and is based on user searches.
Discover last-minute flight deals from Raleigh to Illinois. Data last updated January 31, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 1/31. 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.
Sun 2/86:10 am
RDU
- STL
1 stop25h 41m
Frontier
Wed 2/118:17 pm
STL
- RDU
1 stop20h 43m
Frontier
Deal found 1/31![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 1/31. 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.
Sun 2/86:10 am
RDU
- STL
1 stop25h 41m
Frontier
Tue 2/103:49 pm
STL
- RDU
1 stop21h 09m
Frontier
Deal found 1/31![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/116:25 am
RDU
- MDW
1 stop13h 42m
Frontier
Sun 2/156:00 am
MDW
- RDU
1 stop17h 10m
Frontier
Deal found 1/29![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:10 am
RDU
- STL
1 stop25h 41m
Frontier
Mon 2/168:22 pm
STL
- RDU
1 stop26h 48m
Frontier
Deal found 1/29![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:10 am
RDU
- MDW
1 stop17h 15m
Frontier
Mon 2/166:00 am
MDW
- RDU
1 stop17h 10m
Frontier
Deal found 1/29![Frontier logo]()
$144
This Expedia deal was found by Cheapflights users on 1/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/176:20 am
RDU
- ORD
1 stop11h 37m
Frontier
Tue 2/246:02 pm
ORD
- RDU
1 stop5h 08m
Frontier
Deal found 1/29![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:50 pm
RDU
- STL
1 stop13h 01m
Frontier
Fri 2/208:20 pm
STL
- RDU
1 stop26h 50m
Frontier
Deal found 1/29![Frontier logo]()
$131
This CheapOair deal was found by Cheapflights users on 1/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/203:08 pm
RDU
- ORD
1 stop9h 39m
Multiple Airlines
Mon 2/236:19 pm
ORD
- RDU
Nonstop2h 03m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$148
This CheapOair deal was found by Cheapflights users on 1/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:54 pm
RDU
- STL
1 stop5h 33m
Frontier
Tue 3/33:49 pm
STL
- RDU
1 stop24h 10m
Frontier
Deal found 1/29![Frontier logo]()
$139
This Expedia deal was found by Cheapflights users on 1/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:08 pm
RDU
- ORD
1 stop7h 05m
Multiple Airlines
Thu 3/56:04 am
ORD
- RDU
1 stop7h 43m
Multiple Airlines
Deal found 1/29![Multiple Airlines logo]()
$145
This Frontier deal was found by Cheapflights users on 1/30. 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.
Thu 2/266:10 am
RDU
- MDW
1 stop11h 06m
Frontier
Mon 3/22:19 pm
MDW
- RDU
1 stop8h 51m
Frontier
Deal found 1/30![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/2710:07 pm
RDU
- ORD
Nonstop2h 30m
Multiple Airlines
Fri 3/68:16 pm
ORD
- RDU
2 stops19h 55m
Multiple Airlines
Deal found 1/28![Multiple Airlines logo]()
$149
One-way flights from Raleigh to IllinoisSearch for one-way flight options from Raleigh to Illinois. Find affordable one-way fares based on user searches. Data last updated January 31, 2026.
Search for one-way flight options from Raleigh to Illinois. Find affordable one-way fares based on user searches. Data last updated January 31, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/30. 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 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
Frontier
Deal found 1/30![Frontier logo]()
$39
This Frontier deal was found by Cheapflights users on 1/31. 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.
Fri 2/2710:07 pm
RDU
- ORD
Nonstop2h 30m
Frontier
Deal found 1/31![Frontier logo]()
$40
This Mytrip deal was found by Cheapflights users on 1/31. 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.
Tue 3/36:08 pm
RDU
- ORD
1 stop7h 32m
Spirit Airlines
Deal found 1/31![Spirit Airlines logo]()
$53
This Expedia deal was found by Cheapflights users on 1/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/53:08 pm
RDU
- ORD
1 stop7h 05m
Spirit Airlines
Deal found 1/31![Spirit Airlines logo]()
$56
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/242:53 pm
RDU
- STL
1 stop8h 34m
Frontier
Deal found 1/28![Frontier logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/25:10 pm
RDU
- ORD
1 stop18h 41m
Frontier
Deal found 1/29![Frontier logo]()
$60
This Trip.com deal was found by Cheapflights users on 1/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/86:10 am
RDU
- STL
1 stop25h 41m
Frontier
Deal found 1/29![Frontier logo]()
$60
This Mytrip deal was found by Cheapflights users on 1/31. 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 3/26:08 pm
RDU
- ORD
1 stop7h 32m
Spirit Airlines
Deal found 1/31![Spirit Airlines logo]()
$62
This Trip.com deal was found by Cheapflights users on 1/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:10 am
RDU
- STL
1 stop25h 41m
Frontier
Deal found 1/29![Frontier logo]()
$62
This Super.com deal was found by Cheapflights users on 1/29. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:25 am
RDU
- ORD
1 stop5h 26m
Frontier
Deal found 1/29![Frontier logo]()
$63
This Trip.com deal was found by Cheapflights users on 1/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/56:10 am
RDU
- MDW
1 stop17h 09m
Frontier
Deal found 1/29![Frontier logo]()
$63
This CheapOair deal was found by Cheapflights users on 1/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/236:08 pm
RDU
- ORD
1 stop7h 32m
Spirit Airlines
Deal found 1/30![Spirit Airlines logo]()
$64
Find 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 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $131 (Kiwi.com) |
One-way from | $39 (Kiwi.com) |
Popular in | March |
Cheapest in | August |
Average price | $299 |
Good round-trip deal | $324 or less |
Good one-way deal | $149 or less |
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 31, 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
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Sun 2/8
6:10 am-6:51 am
1 stop25h 41m
Lambert-St Louis
Mon 2/9
8:22 pm-12:10 am
1 stop26h 48m
$133
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Thu 2/26
6:10 am-4:16 pm
1 stop11h 06m
Chicago Midway
Mon 3/2
2:19 pm-12:10 am
1 stop8h 51m
$148
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Tue 3/24
6:25 pm-12:22 am
1 stop6h 57m
Chicago O'Hare Intl
Sun 3/29
6:01 pm-5:29 pm
1 stop22h 28m
$162
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Thu 2/12
6:05 am-11:27 am
1 stop6h 22m
Chicago Midway
Sun 2/15
6:15 am-12:10 am
2 stops40h 55m
$182
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Wed 3/11
6:08 pm-12:40 am
1 stop7h 32m
Chicago O'Hare Intl
Sun 3/15
10:55 am-3:57 pm
1 stop28h 02m
$185
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Thu 4/30
5:14 pm-6:43 pm
Nonstop2h 29m
Chicago O'Hare Intl
Sun 5/3
7:05 am-6:03 pm
1 stop9h 58m
$195
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Sun 2/8
6:10 am-6:51 am
1 stop25h 41m
Lambert-St Louis
Wed 2/11
8:17 pm-2:13 pm
2 stops16h 56m
$195
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Thu 3/26
4:07 pm-10:39 pm
1 stop7h 32m
Chicago O'Hare Intl
Sun 3/29
12:34 pm-3:37 pm
Nonstop2h 03m
$202
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Thu 2/12
6:05 am-10:51 am
1 stop5h 46m
Chicago O'Hare Intl
Sun 2/15
2:13 pm-9:52 am
1 stop18h 39m
$205
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Tue 2/24
10:00 am-11:28 am
Nonstop2h 28m
Chicago O'Hare Intl
Wed 2/25
10:42 am-1:44 pm
Nonstop2h 02m
$219
Showing 1-10 of 60 results
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.
RDU-STL
RDU-ORD
RDU-MDW
RDU-EVV
RDU-RFD
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
RDU-USIL
RDU-STL
RDU-ORD
RDU-MDW
RDU-EVV
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 $59). Flying from Raleigh to Illinois in April is currently the most expensive (average of $200). 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 31, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 27% 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 24, 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 31, 2026.
The most flights from RDU to USIL are scheduled on a Friday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 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 31, 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.
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Raleigh to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
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 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$69 | Average$191 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$307 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$151 | Average$325 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$160 | Average$293 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$173 | Average$428 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$312 | FlexibilityNo cancel fee | On-time63% |