$81+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Jul 25 — Aug 11
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 June 25, 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 June 25, 2026.
This Trip.com deal was found by Cheapflights users on 6/21. 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.
Wed 7/295:29 pm
RDU
- STL
1 stop7h 30m
Frontier
Sat 8/14:57 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 6/21![Frontier logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 8/228:16 pm
RDU
- STL
2 stops22h 06m
Frontier
Sun 8/306:17 pm
STL
- RDU
1 stop13h 15m
Frontier
Deal found 6/25![Frontier logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/137:32 pm
RDU
- STL
2 stops23h 05m
Frontier
Thu 7/166:34 pm
STL
- RDU
1 stop12h 37m
Frontier
Deal found 6/22![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/137:32 pm
RDU
- STL
2 stops23h 05m
Frontier
Wed 7/154:57 pm
STL
- RDU
1 stop6h 07m
Frontier
Deal found 6/24![Frontier logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/1012:04 pm
RDU
- STL
1 stop21h 53m
Frontier
Tue 7/146:34 pm
STL
- RDU
1 stop12h 37m
Frontier
Deal found 6/24![Frontier logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 8/82:31 pm
RDU
- STL
1 stop10h 28m
Frontier
Mon 8/104:57 pm
STL
- RDU
1 stop14h 14m
Frontier
Deal found 6/22![Frontier logo]()
$218
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/126:14 pm
RDU
- STL
1 stop15h 43m
Frontier
Thu 7/166:34 pm
STL
- RDU
1 stop12h 37m
Frontier
Deal found 6/23![Frontier logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 9/184:20 pm
RDU
- STL
1 stop18h 20m
Multiple Airlines
Sun 9/2010:35 am
STL
- RDU
2 stops10h 50m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/296:14 pm
RDU
- STL
2 stops24h 23m
Frontier
Sun 8/26:34 pm
STL
- RDU
1 stop12h 37m
Frontier
Deal found 6/21![Frontier logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/296:14 pm
RDU
- STL
2 stops24h 23m
Frontier
Mon 8/34:57 pm
STL
- RDU
1 stop6h 07m
Frontier
Deal found 6/21![Frontier logo]()
$222
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 7/188:06 pm
RDU
- STL
2 stops37h 51m
Frontier
Sat 7/254:57 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 6/20![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/156:14 pm
RDU
- STL
2 stops24h 23m
Frontier
Fri 7/174:57 pm
STL
- RDU
1 stop6h 07m
Frontier
Deal found 6/22![Frontier logo]()
$227
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 June 25, 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 June 25, 2026.
This Delta deal was found by Cheapflights users on 6/24. 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 10/315:20 pm
RDU
- ORD
1 stop4h 04m
Delta
Wed 11/47:05 am
ORD
- RDU
1 stop3h 41m
Delta
Deal found 6/24![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 6/22. 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 7/188:25 pm
RDU
- MDW
1 stop3h 55m
Southwest
Tue 7/2110:10 am
MDW
- RDU
2 stops6h 20m
Southwest
Deal found 6/22![Southwest logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 8/1310:34 pm
RDU
- RFD
1 stop10h 15m
Multiple Airlines
Sun 8/1611:37 am
RFD
- RDU
2 stops19h 34m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$271
This American Airlines deal was found by Cheapflights users on 6/22. 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 9/25:35 pm
RDU
- PIA
1 stop6h 24m
American Airlines
Sat 9/54:24 pm
PIA
- RDU
1 stop4h 22m
American Airlines
Deal found 6/22![American Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 6/20. 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 8/286:55 am
RDU
- ORD
1 stop5h 56m
United Airlines
Mon 8/3110:50 am
ORD
- RDU
Nonstop2h 17m
United Airlines
Deal found 6/20![United Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 6/21. 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 7/215:10 am
RDU
- ORD
1 stop4h 25m
Delta
Tue 7/216:22 pm
ORD
- RDU
1 stop4h 48m
Delta
Deal found 6/21![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 6/23. 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 8/128:20 am
RDU
- MDW
Nonstop1h 50m
Southwest
Thu 8/137:30 am
MDW
- RDU
1 stop5h 30m
Southwest
Deal found 6/23![Southwest logo]()
$263
This Delta deal was found by Cheapflights users on 6/23. 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 8/153:50 pm
RDU
- ORD
1 stop6h 05m
Delta
Sat 8/225:30 am
ORD
- RDU
1 stop6h 16m
Delta
Deal found 6/23![Delta logo]()
$257
This American Airlines deal was found by Cheapflights users on 6/20. 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 7/186:29 pm
RDU
- MLI
1 stop4h 31m
American Airlines
Sat 7/256:08 am
MLI
- RDU
1 stop5h 40m
American Airlines
Deal found 6/20![American Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/137:32 pm
RDU
- BMI
1 stop15h 26m
Multiple Airlines
Sun 7/197:59 pm
BMI
- RDU
2 stops35h 12m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$292
This Southwest deal was found by Cheapflights users on 6/21. 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 8/196:00 am
RDU
- MDW
2 stops6h 50m
Southwest
Sat 8/299:55 am
MDW
- RDU
2 stops9h 50m
Southwest
Deal found 6/21![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 6/21. 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.
Wed 8/1210:10 am
RDU
- MLI
1 stop7h 15m
Delta
Tue 8/1811:08 am
MLI
- RDU
1 stop7h 04m
Delta
Deal found 6/21![Delta logo]()
$261
This American Airlines deal was found by Cheapflights users on 6/24. 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 8/127:26 pm
RDU
- PIA
1 stop4h 33m
American Airlines
Sun 8/165:05 am
PIA
- RDU
1 stop5h 55m
American Airlines
Deal found 6/24![American Airlines logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/247:32 pm
RDU
- RFD
2 stops37h 57m
Multiple Airlines
Fri 7/317:50 pm
RFD
- RDU
1 stop12h 26m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$293
This Southwest deal was found by Cheapflights users on 6/22. 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 8/68:05 am
RDU
- MDW
2 stops7h 25m
Southwest
Sat 8/87:40 am
MDW
- RDU
Nonstop1h 55m
Southwest
Deal found 6/22![Southwest logo]()
$268
This United Airlines deal was found by Cheapflights users on 6/24. 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 9/110:40 am
RDU
- ORD
1 stop4h 50m
United Airlines
Wed 9/26:28 pm
ORD
- RDU
Nonstop2h 21m
United Airlines
Deal found 6/24![United Airlines logo]()
$327
This Delta deal was found by Cheapflights users on 6/22. 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.
Wed 9/236:20 am
RDU
- MLI
1 stop5h 03m
Delta
Sat 9/266:00 am
MLI
- RDU
1 stop7h 08m
Delta
Deal found 6/22![Delta logo]()
$261
This American Airlines deal was found by Cheapflights users on 6/20. 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 8/126:41 pm
RDU
- MLI
2 stops6h 27m
American Airlines
Tue 8/186:00 am
MLI
- RDU
2 stops8h 26m
American Airlines
Deal found 6/20![American Airlines logo]()
$296
This Southwest deal was found by Cheapflights users on 6/21. 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 7/217:25 pm
RDU
- STL
Nonstop2h 05m
Southwest
Tue 7/289:40 am
STL
- RDU
1 stop3h 35m
Southwest
Deal found 6/21![Southwest logo]()
$277
This United Airlines deal was found by Cheapflights users on 6/21. 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 8/225:09 pm
RDU
- MLI
1 stop7h 05m
United Airlines
Wed 8/2610:30 am
MLI
- RDU
1 stop4h 32m
United Airlines
Deal found 6/21![United Airlines logo]()
$341
This Delta deal was found by Cheapflights users on 6/24. 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.
Wed 10/76:35 am
RDU
- MLI
1 stop4h 51m
Delta
Sat 10/105:00 pm
MLI
- RDU
1 stop6h 23m
Delta
Deal found 6/24![Delta logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/152:30 pm
RDU
- RFD
2 stops21h 07m
Multiple Airlines
Mon 7/207:50 pm
RFD
- RDU
1 stop12h 35m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$332
This American Airlines deal was found by Cheapflights users on 6/21. 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 8/2010:17 am
RDU
- PIA
1 stop6h 56m
American Airlines
Sun 8/235:05 am
PIA
- RDU
1 stop3h 48m
American Airlines
Deal found 6/21![American Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 6/23. 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 7/226:10 pm
RDU
- STL
1 stop6h 05m
Southwest
Sat 7/257:10 pm
STL
- RDU
Nonstop1h 55m
Southwest
Deal found 6/23![Southwest logo]()
$281
This United Airlines deal was found by Cheapflights users on 6/22. 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 9/266:05 am
RDU
- MLI
1 stop5h 07m
United Airlines
Tue 9/296:32 am
MLI
- RDU
2 stops11h 18m
United Airlines
Deal found 6/22![United Airlines logo]()
$346
This Delta deal was found by Cheapflights users on 6/22. 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 9/226:20 am
RDU
- MLI
1 stop5h 03m
Delta
Tue 9/296:00 am
MLI
- RDU
1 stop7h 16m
Delta
Deal found 6/22![Delta logo]()
$261
This American Airlines deal was found by Cheapflights users on 6/20. 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 7/188:10 pm
RDU
- BMI
1 stop5h 25m
American Airlines
Sat 7/255:00 am
BMI
- RDU
1 stop6h 48m
American Airlines
Deal found 6/20![American Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 6/21. 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 7/291:15 pm
RDU
- STL
1 stop5h 45m
Southwest
Sat 8/17:10 pm
STL
- RDU
Nonstop1h 55m
Southwest
Deal found 6/21![Southwest logo]()
$281
This United Airlines deal was found by Cheapflights users on 6/24. 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 8/216:00 am
RDU
- ORD
1 stop4h 38m
United Airlines
Sun 8/232:30 pm
ORD
- RDU
Nonstop2h 11m
United Airlines
Deal found 6/24![United Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/2310:34 pm
RDU
- RFD
1 stop10h 15m
Multiple Airlines
Sun 7/2611:27 am
RFD
- RDU
2 stops21h 52m
Multiple Airlines
Deal found 6/23![Multiple Airlines logo]()
$368
Last-minute flights from Raleigh to IllinoisDiscover last-minute flight deals from Raleigh to Illinois. Data last updated June 25, 2026 and is based on user searches.
Discover last-minute flight deals from Raleigh to Illinois. Data last updated June 25, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/1012:04 pm
RDU
- STL
1 stop21h 53m
Frontier
Tue 7/146:34 pm
STL
- RDU
1 stop12h 37m
Frontier
Deal found 6/24![Frontier logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/126:14 pm
RDU
- STL
1 stop15h 43m
Frontier
Thu 7/166:34 pm
STL
- RDU
1 stop12h 37m
Frontier
Deal found 6/23![Frontier logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/137:32 pm
RDU
- STL
2 stops23h 05m
Frontier
Thu 7/166:34 pm
STL
- RDU
1 stop12h 37m
Frontier
Deal found 6/22![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/137:32 pm
RDU
- STL
2 stops23h 05m
Frontier
Wed 7/154:57 pm
STL
- RDU
1 stop6h 07m
Frontier
Deal found 6/24![Frontier logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/146:15 am
RDU
- STL
1 stop12h 22m
Frontier
Sun 7/196:34 pm
STL
- RDU
2 stops19h 03m
Frontier
Deal found 6/23![Frontier logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/156:14 pm
RDU
- STL
2 stops24h 23m
Frontier
Fri 7/174:57 pm
STL
- RDU
1 stop6h 07m
Frontier
Deal found 6/22![Frontier logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/156:14 pm
RDU
- STL
2 stops24h 23m
Frontier
Mon 7/204:57 pm
STL
- RDU
1 stop6h 07m
Frontier
Deal found 6/23![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/166:14 pm
RDU
- STL
1 stop15h 43m
Frontier
Sun 7/196:34 pm
STL
- RDU
2 stops19h 03m
Frontier
Deal found 6/23![Frontier logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 7/188:06 pm
RDU
- STL
2 stops37h 51m
Frontier
Sat 7/254:57 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 6/20![Frontier logo]()
$226
This Trip.com deal was found by Cheapflights users on 6/21. 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.
Wed 7/295:29 pm
RDU
- STL
1 stop7h 30m
Frontier
Sat 8/14:57 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 6/21![Frontier logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/296:14 pm
RDU
- STL
2 stops24h 23m
Frontier
Sun 8/26:34 pm
STL
- RDU
1 stop12h 37m
Frontier
Deal found 6/21![Frontier logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/296:14 pm
RDU
- STL
2 stops24h 23m
Frontier
Mon 8/34:57 pm
STL
- RDU
1 stop6h 07m
Frontier
Deal found 6/21![Frontier logo]()
$222
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 June 25, 2026.
Search for one-way flight options from Raleigh to Illinois. Find affordable one-way fares based on user searches. Data last updated June 25, 2026.
This Trip.com deal was found by Cheapflights users on 6/23. 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 8/216:05 am
RDU
- STL
1 stop12h 17m
Frontier
Deal found 6/23![Frontier logo]()
$81
This Trip.com deal was found by Cheapflights users on 6/22. 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 8/206:05 am
RDU
- STL
1 stop12h 17m
Frontier
Deal found 6/22![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/146:15 am
RDU
- STL
1 stop12h 22m
Frontier
Deal found 6/23![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/196:14 pm
RDU
- STL
1 stop15h 43m
Frontier
Deal found 6/24![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/216:14 pm
RDU
- STL
1 stop15h 43m
Frontier
Deal found 6/21![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 9/184:20 pm
RDU
- STL
1 stop18h 20m
Frontier
Deal found 6/21![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 9/194:20 pm
RDU
- STL
1 stop18h 20m
Frontier
Deal found 6/21![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 9/214:20 pm
RDU
- STL
1 stop18h 20m
Frontier
Deal found 6/21![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 8/227:05 am
RDU
- STL
1 stop10h 06m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 9/204:20 pm
RDU
- STL
1 stop18h 20m
Frontier
Deal found 6/24![Frontier logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/252:31 pm
RDU
- STL
1 stop10h 28m
Frontier
Deal found 6/24![Frontier logo]()
$110
This Trip.com deal was found by Cheapflights users on 6/24. 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 7/76:15 am
RDU
- STL
1 stop12h 22m
Frontier
Deal found 6/24![Frontier logo]()
$116
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 June 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $208 (Trip.com) |
One-way from | $81 (Trip.com) |
Popular in | February |
Cheapest in | December |
Average price | $337 |
Good round-trip deal | $336 or less |
Good one-way deal | $188 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 June 25, 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
Sat 10/31
5:20 pm-8:24 pm
1 stop4h 04m
Chicago O'Hare Intl
Wed 11/4
7:05 am-11:46 am
1 stop3h 41m
$257
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Tue 7/21
5:10 am-8:35 am
1 stop4h 25m
Chicago O'Hare Intl
Tue 7/21
6:22 pm-12:10 am
1 stop4h 48m
$257
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Sat 8/15
3:50 pm-8:55 pm
1 stop6h 05m
Chicago O'Hare Intl
Sat 8/22
5:30 am-12:46 pm
1 stop6h 16m
$257
RaleighMoline
RDU - MLI
RDUMLI
Raleigh-Durham
Wed 8/12
10:10 am-4:25 pm
1 stop7h 15m
Moline Quad-City
Tue 8/18
11:08 am-7:12 pm
1 stop7h 04m
$261
RaleighMoline
RDU - MLI
RDUMLI
Raleigh-Durham
Wed 9/23
6:20 am-10:23 am
1 stop5h 03m
Moline Quad-City
Sat 9/26
6:00 am-2:08 pm
1 stop7h 08m
$261
RaleighMoline
RDU - MLI
RDUMLI
Raleigh-Durham
Wed 10/7
6:35 am-10:26 am
1 stop4h 51m
Moline Quad-City
Sat 10/10
5:00 pm-12:23 am
1 stop6h 23m
$261
RaleighMoline
RDU - MLI
RDUMLI
Raleigh-Durham
Tue 9/22
6:20 am-10:23 am
1 stop5h 03m
Moline Quad-City
Tue 9/29
6:00 am-2:16 pm
1 stop7h 16m
$261
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Sat 7/18
8:25 pm-11:20 pm
1 stop3h 55m
Chicago Midway
Tue 7/21
10:10 am-5:30 pm
2 stops6h 20m
$262
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Wed 8/12
8:20 am-9:10 am
Nonstop1h 50m
Chicago Midway
Thu 8/13
7:30 am-2:00 pm
1 stop5h 30m
$263
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Wed 8/19
6:00 am-11:50 am
2 stops6h 50m
Chicago Midway
Sat 8/29
9:55 am-8:45 pm
2 stops9h 50m
$267
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-RFD
RDU-PIA
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-RFD
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 $33). Flying from Raleigh to Illinois in April is currently the most expensive (average of $680). 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 June 25, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 26% on flights from Raleigh to Illinois by exploring options for tickets in the evening.
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 June 25, 2026.
The most flights from RDU to USIL are scheduled on a Wednesday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).
How much does it cost to fly round-trip from Raleigh to Illinois?
How far ahead should I book a flight from Raleigh to Illinois?
To ensure you get the cheapest price possible for a flight from Raleigh to Illinois, you should look to book at least 81 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
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 June 20, 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.
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 June 25, 2026.
Read reviews from past customers who have flown Southwest,United Airlines, andAmerican 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.
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
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
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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 June 25, 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 June 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$73 | Average$198 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$354 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$153 | Average$347 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$160 | Average$293 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$173 | Average$396 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$325 | FlexibilityNo cancel fee | On-time63% |