$69+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Apr 15 — Apr 221
Round-trip
1 adult, Economy
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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 March 16, 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 March 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 5/1712:54 pm
RDU
- STL
1 stop21h 01m
Frontier
Wed 5/205:27 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 3/12![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/83:57 pm
RDU
- STL
1 stop26h 37m
Frontier
Wed 4/158:23 pm
STL
- RDU
1 stop11h 00m
Frontier
Deal found 3/11![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/186:00 am
RDU
- ORD
1 stop6h 33m
Frontier
Wed 4/226:08 pm
ORD
- RDU
1 stop13h 15m
Frontier
Deal found 3/12![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/135:11 pm
RDU
- ORD
Nonstop2h 19m
Multiple Airlines
Wed 4/157:15 pm
ORD
- RDU
2 stops26h 40m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$162
This Expedia deal was found by Cheapflights users on 3/13. 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.
Fri 4/179:47 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Sun 4/191:12 pm
ORD
- RDU
Nonstop2h 07m
Frontier
Deal found 3/13![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/144:00 pm
RDU
- STL
1 stop15h 50m
Frontier
Fri 4/178:23 pm
STL
- RDU
1 stop11h 43m
Frontier
Deal found 3/13![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Wed 5/136:15 am
RDU
- ORD
1 stop5h 31m
Multiple Airlines
Fri 5/1511:51 am
ORD
- RDU
1 stop19h 13m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Wed 4/156:00 am
RDU
- ORD
1 stop12h 00m
Frontier
Thu 4/304:28 pm
ORD
- RDU
1 stop5h 52m
Frontier
Deal found 3/15![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Wed 4/154:00 pm
RDU
- MDW
1 stop7h 14m
Frontier
Thu 4/302:15 pm
MDW
- RDU
1 stop8h 05m
Frontier
Deal found 3/15![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/93:57 pm
RDU
- ORD
1 stop7h 47m
Frontier
Thu 4/1612:16 pm
ORD
- RDU
Nonstop2h 07m
Frontier
Deal found 3/12![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/173:49 pm
RDU
- MDW
1 stop7h 37m
Frontier
Sun 4/196:00 am
MDW
- RDU
1 stop25h 46m
Frontier
Deal found 3/12![Frontier logo]()
$167
This Frontier deal was found by Cheapflights users on 3/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:14 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Sun 4/262:10 pm
ORD
- RDU
Nonstop2h 07m
Frontier
Deal found 3/15![Frontier logo]()
$168
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 March 16, 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 March 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/306:10 am
RDU
- ORD
1 stop5h 13m
Multiple Airlines
Sun 5/311:28 am
ORD
- RDU
1 stop10h 27m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$164
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Fri 5/86:20 am
RDU
- ORD
Nonstop2h 28m
United Airlines
Sat 5/99:35 pm
ORD
- RDU
Nonstop2h 15m
United Airlines
Deal found 3/11![United Airlines logo]()
$217
This Southwest deal was found by Cheapflights users on 3/14. 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 5/28:00 am
RDU
- MDW
Nonstop2h 00m
Southwest
Tue 5/51:55 pm
MDW
- RDU
1 stop6h 45m
Southwest
Deal found 3/14![Southwest logo]()
$227
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/185:38 am
RDU
- MDW
1 stop4h 09m
Delta
Mon 4/206:38 pm
MDW
- RDU
1 stop4h 01m
Delta
Deal found 3/15![Delta logo]()
$257
This American Airlines deal was found by Cheapflights users on 3/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/125:45 am
RDU
- BMI
1 stop6h 01m
American Airlines
Sun 4/195:00 am
BMI
- RDU
1 stop5h 11m
American Airlines
Deal found 3/15![American Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:10 am
RDU
- ORD
1 stop8h 05m
Southwest
Thu 5/142:40 pm
ORD
- RDU
2 stops6h 55m
Southwest
Deal found 3/11![Southwest logo]()
$242
This United Airlines deal was found by Cheapflights users on 3/12. 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 5/1410:41 am
RDU
- ORD
1 stop6h 49m
United Airlines
Sun 5/176:45 am
ORD
- RDU
Nonstop2h 00m
United Airlines
Deal found 3/12![United Airlines logo]()
$246
This Delta deal was found by Cheapflights users on 3/13. 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 5/157:55 pm
RDU
- ORD
1 stop5h 04m
Delta
Sat 5/235:19 pm
ORD
- RDU
1 stop5h 07m
Delta
Deal found 3/13![Delta logo]()
$270
This Southwest deal was found by Cheapflights users on 3/11. 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 5/26:55 am
RDU
- ORD
2 stops9h 35m
Southwest
Mon 5/42:40 pm
ORD
- RDU
2 stops7h 30m
Southwest
Deal found 3/11![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Sun 5/316:15 am
RDU
- ORD
Nonstop2h 28m
United Airlines
Wed 6/39:38 pm
ORD
- RDU
Nonstop2h 12m
United Airlines
Deal found 3/12![United Airlines logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 5/2110:36 pm
RDU
- BMI
1 stop11h 15m
Multiple Airlines
Thu 6/47:58 pm
BMI
- RDU
1 stop12h 02m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/144:50 pm
RDU
- MDW
1 stop8h 05m
Southwest
Sun 5/177:40 am
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 3/12![Southwest logo]()
$247
This American Airlines deal was found by Cheapflights users on 3/13. 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 4/33:47 pm
RDU
- BMI
1 stop7h 54m
American Airlines
Sat 4/115:00 am
BMI
- RDU
1 stop5h 11m
American Airlines
Deal found 3/13![American Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 3/12. 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 6/35:07 pm
RDU
- ORD
Nonstop2h 30m
United Airlines
Sun 6/79:38 pm
ORD
- RDU
Nonstop2h 12m
United Airlines
Deal found 3/12![United Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 3/12. 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 5/235:40 am
RDU
- MDW
1 stop4h 03m
Delta
Sat 5/305:10 pm
MDW
- RDU
1 stop6h 06m
Delta
Deal found 3/12![Delta logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 5/298:29 pm
RDU
- RFD
1 stop13h 52m
Multiple Airlines
Mon 6/18:03 pm
RFD
- RDU
1 stop12h 18m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$321
This Southwest deal was found by Cheapflights users on 3/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:35 pm
RDU
- MDW
Nonstop2h 00m
Southwest
Sun 6/77:40 am
MDW
- RDU
Nonstop1h 55m
Southwest
Deal found 3/15![Southwest logo]()
$280
This American Airlines deal was found by Cheapflights users on 3/11. 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 9/25:25 am
RDU
- PIA
1 stop6h 26m
American Airlines
Sat 9/56:00 am
PIA
- RDU
2 stops7h 02m
American Airlines
Deal found 3/11![American Airlines logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 6/119:49 pm
RDU
- RFD
1 stop10h 56m
Multiple Airlines
Sun 6/1411:27 am
RFD
- RDU
1 stop9h 26m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 3/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:00 am
RDU
- ORD
1 stop7h 06m
United Airlines
Sun 6/79:38 pm
ORD
- RDU
Nonstop2h 12m
United Airlines
Deal found 3/15![United Airlines logo]()
$306
This Southwest deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/232:00 pm
RDU
- MDW
2 stops7h 05m
Southwest
Sun 4/265:00 am
MDW
- RDU
1 stop5h 40m
Southwest
Deal found 3/11![Southwest logo]()
$290
This Delta deal was found by Cheapflights users on 3/13. 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 4/47:59 pm
RDU
- STL
1 stop4h 59m
Delta
Fri 4/106:59 pm
STL
- RDU
1 stop4h 22m
Delta
Deal found 3/13![Delta logo]()
$357
This United Airlines deal was found by Cheapflights users on 3/13. 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 4/211:15 pm
RDU
- ORD
Nonstop2h 34m
United Airlines
Sat 5/29:05 am
ORD
- RDU
Nonstop2h 11m
United Airlines
Deal found 3/13![United Airlines logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 6/1210:16 pm
RDU
- RFD
1 stop12h 01m
Multiple Airlines
Fri 6/197:53 pm
RFD
- RDU
1 stop12h 07m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$338
This Southwest deal was found by Cheapflights users on 3/12. 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 4/295:50 am
RDU
- ORD
2 stops8h 00m
Southwest
Sat 5/21:55 pm
ORD
- RDU
2 stops8h 00m
Southwest
Deal found 3/12![Southwest logo]()
$297
This American Airlines deal was found by Cheapflights users on 3/11. 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 4/173:54 pm
RDU
- CMI
1 stop6h 41m
American Airlines
Sun 4/196:58 pm
CMI
- RDU
1 stop4h 01m
American Airlines
Deal found 3/11![American Airlines logo]()
$398
This Delta deal was found by Cheapflights users on 3/13. 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.
Sun 4/57:20 am
RDU
- STL
1 stop4h 49m
Delta
Fri 4/106:59 pm
STL
- RDU
1 stop4h 22m
Delta
Deal found 3/13![Delta logo]()
$371
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Fri 5/297:45 pm
RDU
- ORD
1 stop4h 41m
United Airlines
Mon 6/19:38 pm
ORD
- RDU
Nonstop2h 12m
United Airlines
Deal found 3/14![United Airlines logo]()
$310
This Delta deal was found by Cheapflights users on 3/13. 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.
Sun 4/57:20 am
RDU
- STL
1 stop4h 49m
Delta
Wed 4/87:03 am
STL
- RDU
1 stop5h 30m
Delta
Deal found 3/13![Delta logo]()
$371
This United Airlines deal was found by Cheapflights users on 3/11. 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 6/106:00 am
RDU
- PIA
2 stops8h 57m
United Airlines
Sun 6/145:30 am
PIA
- RDU
1 stop4h 28m
United Airlines
Deal found 3/11![United Airlines logo]()
$314
Last-minute flights from Raleigh to IllinoisDiscover last-minute flight deals from Raleigh to Illinois. Data last updated March 16, 2026 and is based on user searches.
Discover last-minute flight deals from Raleigh to Illinois. Data last updated March 16, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/83:57 pm
RDU
- STL
1 stop26h 37m
Frontier
Wed 4/158:23 pm
STL
- RDU
1 stop11h 00m
Frontier
Deal found 3/11![Frontier logo]()
$153
This Super.com deal was found by Cheapflights users on 3/12. 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 4/98:28 am
RDU
- ORD
1 stop7h 14m
Frontier
Thu 4/1612:16 pm
ORD
- RDU
Nonstop2h 07m
Frontier
Deal found 3/12![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/135:11 pm
RDU
- ORD
Nonstop2h 19m
Multiple Airlines
Wed 4/157:15 pm
ORD
- RDU
2 stops26h 40m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/144:00 pm
RDU
- STL
1 stop15h 50m
Frontier
Fri 4/178:23 pm
STL
- RDU
1 stop11h 43m
Frontier
Deal found 3/13![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Wed 4/156:00 am
RDU
- ORD
1 stop12h 00m
Frontier
Thu 4/304:28 pm
ORD
- RDU
1 stop5h 52m
Frontier
Deal found 3/15![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Wed 4/154:00 pm
RDU
- MDW
1 stop7h 14m
Frontier
Thu 4/302:15 pm
MDW
- RDU
1 stop8h 05m
Frontier
Deal found 3/15![Frontier logo]()
$166
This Expedia deal was found by Cheapflights users on 3/13. 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.
Fri 4/179:47 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Sun 4/191:12 pm
ORD
- RDU
Nonstop2h 07m
Frontier
Deal found 3/13![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/173:49 pm
RDU
- MDW
1 stop7h 37m
Frontier
Sun 4/196:00 am
MDW
- RDU
1 stop25h 46m
Frontier
Deal found 3/12![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/186:00 am
RDU
- ORD
1 stop6h 33m
Frontier
Wed 4/226:08 pm
ORD
- RDU
1 stop13h 15m
Frontier
Deal found 3/12![Frontier logo]()
$161
This Frontier deal was found by Cheapflights users on 3/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:14 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Sun 4/262:10 pm
ORD
- RDU
Nonstop2h 07m
Frontier
Deal found 3/15![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/239:37 pm
RDU
- ORD
1 stop12h 59m
Multiple Airlines
Sat 4/254:28 pm
ORD
- RDU
1 stop5h 27m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/2410:03 pm
RDU
- ORD
Nonstop2h 19m
Multiple Airlines
Mon 4/277:15 pm
ORD
- RDU
2 stops18h 49m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$170
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 March 16, 2026.
Search for one-way flight options from Raleigh to Illinois. Find affordable one-way fares based on user searches. Data last updated March 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/144:00 pm
RDU
- STL
1 stop15h 50m
Frontier
Deal found 3/11![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 5/1212:54 pm
RDU
- STL
1 stop21h 01m
Frontier
Deal found 3/12![Frontier logo]()
$70
This Trip.com deal was found by Cheapflights users on 3/11. 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 5/36:10 am
RDU
- STL
1 stop25h 40m
Frontier
Deal found 3/11![Frontier logo]()
$78
This Trip.com deal was found by Cheapflights users on 3/12. 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 4/96:00 am
RDU
- STL
1 stop12h 34m
Frontier
Deal found 3/12![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/154:00 pm
RDU
- STL
1 stop19h 30m
Frontier
Deal found 3/12![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Mon 4/133:57 pm
RDU
- ORD
1 stop26h 03m
Frontier
Deal found 3/15![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Mon 4/133:57 pm
RDU
- MDW
1 stop28h 34m
Frontier
Deal found 3/15![Frontier logo]()
$88
This Super.com deal was found by Cheapflights users on 3/12. 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.
Sun 5/1012:26 pm
RDU
- ORD
1 stop9h 11m
Frontier
Deal found 3/12![Frontier logo]()
$89
This Super.com deal was found by Cheapflights users on 3/14. 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.
Tue 3/314:12 pm
RDU
- MDW
1 stop5h 42m
Frontier
Deal found 3/14![Frontier logo]()
$89
This Frontier deal was found by Cheapflights users on 3/13. 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 4/103:57 pm
RDU
- ORD
1 stop7h 42m
Frontier
Deal found 3/13![Frontier logo]()
$90
This Priceline deal was found by Cheapflights users on 3/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/83:57 pm
RDU
- MDW
1 stop7h 22m
Frontier
Deal found 3/15![Frontier logo]()
$90
This Frontier deal was found by Cheapflights users on 3/13. 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.
Mon 4/134:46 pm
RDU
- STL
1 stop7h 39m
Frontier
Deal found 3/13![Frontier logo]()
$90
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 March 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $148 (Kiwi.com) |
One-way from | $69 (Kiwi.com) |
Popular in | February |
Cheapest in | December |
Average price | $309 |
Good round-trip deal | $287 or less |
Good one-way deal | $154 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 March 16, 2026.
Use the filters below to find and compare flights from Raleigh to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Thu 4/30
6:10 am-10:23 am
1 stop5h 13m
Chicago O'Hare Intl
Sun 5/3
11:28 am-10:55 pm
1 stop10h 27m
$164
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Fri 5/8
6:20 am-7:48 am
Nonstop2h 28m
Chicago O'Hare Intl
Sat 5/9
9:35 pm-12:50 am
Nonstop2h 15m
$217
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Sat 5/2
8:00 am-9:00 am
Nonstop2h 00m
Chicago Midway
Tue 5/5
1:55 pm-9:40 pm
1 stop6h 45m
$227
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Thu 5/14
6:10 am-1:15 pm
1 stop8h 05m
Chicago O'Hare Intl
Thu 5/14
2:40 pm-10:35 pm
2 stops6h 55m
$242
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Thu 5/14
10:41 am-4:30 pm
1 stop6h 49m
Chicago O'Hare Intl
Sun 5/17
6:45 am-9:45 am
Nonstop2h 00m
$246
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Sat 5/2
6:55 am-3:30 pm
2 stops9h 35m
Chicago O'Hare Intl
Mon 5/4
2:40 pm-11:10 pm
2 stops7h 30m
$247
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Thu 5/14
4:50 pm-11:55 pm
1 stop8h 05m
Chicago Midway
Sun 5/17
7:40 am-10:30 am
Nonstop1h 50m
$247
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Sat 4/18
5:38 am-8:47 am
1 stop4h 09m
Chicago Midway
Mon 4/20
6:38 pm-11:39 pm
1 stop4h 01m
$257
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Sun 5/31
6:15 am-7:43 am
Nonstop2h 28m
Chicago O'Hare Intl
Wed 6/3
9:38 pm-12:50 am
Nonstop2h 12m
$257
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Wed 6/3
5:07 pm-6:37 pm
Nonstop2h 30m
Chicago O'Hare Intl
Sun 6/7
9:38 pm-12:50 am
Nonstop2h 12m
$257
Showing 1-10 of 60 resultsSorted by cheapest first
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-BMI
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-BMI
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 $49). Flying from Raleigh to Illinois in April is currently the most expensive (average of $154). 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 16, 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 March 14, 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 March 16, 2026.
The most flights from RDU to USIL are scheduled on a Friday (33 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (19 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 March 16, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited 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.
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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.
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Alternative routes for Raleigh to Illinois
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Complete your trip
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Search flights from Raleigh to Illinois by cabin class
Find flights from Raleigh to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Raleigh and Illinois flights
Browse other Raleigh and Illinois flight options. Last updated on March 16, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Raleigh to Illinois flights
Consider these flights traveling from Raleigh to Illinois.
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 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$73 | Average$191 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$277 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$147 | Average$323 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$160 | Average$293 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$429 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$304 | FlexibilityNo cancel fee | On-time63% |