$64+ Cheap flights from Raleigh (RDU) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
May 3 — May 101
Round-trip
1 adult, Economy
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Find cheap flights from Raleigh to Illinois with Cheapflights
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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 April 3, 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 April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/33:42 pm
RDU
- STL
1 stop16h 08m
Frontier
Wed 5/135:27 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 3/31![Frontier logo]()
$135
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Fri 5/13:49 pm
RDU
- STL
1 stop16h 01m
Frontier
Mon 5/48:23 pm
STL
- RDU
1 stop14h 36m
Frontier
Deal found 3/31![Frontier logo]()
$136
This Frontier deal was found by Cheapflights users on 3/30. 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 5/76:15 am
RDU
- STL
1 stop11h 39m
Frontier
Sat 5/95:27 pm
STL
- RDU
1 stop6h 02m
Frontier
Deal found 3/30![Frontier logo]()
$140
This Expedia deal was found by Cheapflights users on 3/29. 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.
Mon 4/2010:51 pm
RDU
- STL
1 stop25h 28m
Frontier
Wed 4/224:59 pm
STL
- RDU
1 stop13h 57m
Frontier
Deal found 3/29![Frontier logo]()
$141
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2412:57 pm
RDU
- STL
1 stop11h 22m
Frontier
Mon 4/278:17 pm
STL
- RDU
1 stop21h 27m
Frontier
Deal found 3/31![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/294:00 pm
RDU
- STL
1 stop19h 26m
Frontier
Wed 5/65:27 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 3/30![Frontier logo]()
$159
This Frontier deal was found by Cheapflights users on 3/31. 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.
Mon 5/412:57 pm
RDU
- STL
1 stop11h 22m
Frontier
Thu 5/76:55 pm
STL
- RDU
1 stop4h 29m
Frontier
Deal found 3/31![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Thu 6/1112:54 pm
RDU
- STL
1 stop5h 36m
Frontier
Mon 6/155:33 pm
STL
- RDU
1 stop5h 47m
Frontier
Deal found 3/31![Frontier logo]()
$162
This Frontier deal was found by Cheapflights users on 3/30. 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 4/166:10 am
RDU
- ORD
1 stop6h 22m
Frontier
Mon 4/202:10 pm
ORD
- RDU
Nonstop2h 07m
Frontier
Deal found 3/30![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/224:00 pm
RDU
- ORD
2 stops9h 24m
Multiple Airlines
Wed 4/2911:28 am
ORD
- RDU
1 stop11h 15m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$169
This Frontier deal was found by Cheapflights users on 3/31. 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.
Thu 4/164:08 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Sun 4/192:37 pm
ORD
- RDU
1 stop4h 51m
Frontier
Deal found 3/31![Frontier logo]()
$170
This Trip.com deal was found by Cheapflights users on 3/30. 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.
Fri 4/173:49 pm
RDU
- MDW
1 stop4h 42m
Frontier
Mon 4/202:15 pm
MDW
- RDU
1 stop7h 45m
Frontier
Deal found 3/30![Frontier logo]()
$170
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 April 3, 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 April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 4/1![Multiple Airlines logo]()
$223
This Southwest deal was found by Cheapflights users on 3/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:40 pm
RDU
- MDW
Nonstop2h 00m
Southwest
Wed 5/206:05 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 3/29![Southwest logo]()
$237
This United Airlines deal was found by Cheapflights users on 3/30. 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 4/281:15 pm
RDU
- ORD
Nonstop2h 34m
United Airlines
Wed 4/2910:50 am
ORD
- RDU
Nonstop2h 08m
United Airlines
Deal found 3/30![United Airlines logo]()
$251
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/35:18 am
RDU
- MDW
1 stop5h 38m
Delta
Tue 5/510:41 am
MDW
- RDU
1 stop4h 10m
Delta
Deal found 3/31![Delta logo]()
$257
This American Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:17 pm
RDU
- PIA
2 stops7h 17m
American Airlines
Sat 5/91:32 pm
PIA
- RDU
2 stops7h 23m
American Airlines
Deal found 4/1![American Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 5/266:31 pm
RDU
- RFD
1 stop15h 50m
Multiple Airlines
Sun 5/3111:27 am
RFD
- RDU
2 stops11h 57m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$233
This Southwest deal was found by Cheapflights users on 3/30. 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.
Tue 4/286:50 am
RDU
- MDW
1 stop4h 50m
Southwest
Wed 4/297:40 am
MDW
- RDU
2 stops9h 25m
Southwest
Deal found 3/30![Southwest logo]()
$276
This United Airlines deal was found by Cheapflights users on 3/29. 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 5/3010:05 am
RDU
- MLI
1 stop6h 07m
United Airlines
Sun 6/76:34 pm
MLI
- RDU
1 stop5h 16m
United Airlines
Deal found 3/29![United Airlines logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/198:01 pm
RDU
- RFD
1 stop14h 20m
Multiple Airlines
Thu 5/2111:27 am
RFD
- RDU
2 stops11h 57m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$263
This American Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/64:28 pm
RDU
- PIA
2 stops8h 31m
American Airlines
Wed 6/106:00 am
PIA
- RDU
2 stops7h 22m
American Airlines
Deal found 4/2![American Airlines logo]()
$302
This Southwest deal was found by Cheapflights users on 3/30. 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.
Thu 5/144:50 pm
RDU
- MDW
1 stop8h 05m
Southwest
Thu 5/212:40 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 3/30![Southwest logo]()
$287
This United Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/226:15 am
RDU
- ORD
Nonstop2h 28m
United Airlines
Mon 6/19:38 pm
ORD
- RDU
Nonstop2h 12m
United Airlines
Deal found 4/2![United Airlines logo]()
$291
This Delta deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:20 am
RDU
- STL
1 stop3h 59m
Delta
Sat 6/65:15 pm
STL
- RDU
1 stop14h 38m
Delta
Deal found 4/2![Delta logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 5/710:15 pm
RDU
- RFD
1 stop12h 44m
Multiple Airlines
Sun 5/1010:37 am
RFD
- RDU
2 stops12h 47m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$271
This Southwest deal was found by Cheapflights users on 3/30. 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 5/2911:45 am
RDU
- MDW
Nonstop2h 00m
Southwest
Mon 6/12:40 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 3/30![Southwest logo]()
$291
This American Airlines deal was found by Cheapflights users on 3/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/88:54 am
RDU
- EVV
1 stop4h 26m
American Airlines
Sat 7/114:35 pm
EVV
- RDU
1 stop6h 24m
American Airlines
Deal found 3/31![American Airlines logo]()
$331
This United Airlines deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/88:00 am
RDU
- ORD
Nonstop2h 26m
United Airlines
Fri 6/128:40 am
ORD
- RDU
1 stop4h 28m
United Airlines
Deal found 4/3![United Airlines logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:21 pm
RDU
- RFD
1 stop16h 00m
Multiple Airlines
Fri 5/298:03 pm
RFD
- RDU
1 stop12h 18m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$279
This Southwest deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/911:55 am
RDU
- MDW
Nonstop1h 50m
Southwest
Wed 8/127:40 am
MDW
- RDU
1 stop4h 00m
Southwest
Deal found 4/1![Southwest logo]()
$297
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Tue 4/1410:11 am
RDU
- CMI
2 stops9h 17m
American Airlines
Sat 4/183:09 pm
CMI
- RDU
1 stop6h 28m
American Airlines
Deal found 3/30![American Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/176:00 am
RDU
- ORD
1 stop4h 36m
United Airlines
Mon 6/226:25 pm
ORD
- RDU
Nonstop2h 12m
United Airlines
Deal found 4/3![United Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 3/30. 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.
Wed 6/245:20 am
RDU
- EVV
1 stop5h 08m
Delta
Mon 6/296:01 pm
EVV
- RDU
1 stop4h 26m
Delta
Deal found 3/30![Delta logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Thu 5/710:15 pm
RDU
- RFD
1 stop12h 44m
Multiple Airlines
Fri 5/87:09 pm
RFD
- RDU
1 stop12h 49m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$290
This Southwest deal was found by Cheapflights users on 3/30. 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 6/510:05 am
RDU
- MDW
1 stop9h 00m
Southwest
Mon 6/87:40 am
MDW
- RDU
Nonstop1h 55m
Southwest
Deal found 3/30![Southwest logo]()
$301
This Delta deal was found by Cheapflights users on 3/30. 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.
Wed 6/177:31 am
RDU
- EVV
1 stop6h 35m
Delta
Mon 6/221:46 pm
EVV
- RDU
1 stop4h 08m
Delta
Deal found 3/30![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 3/30. 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.
Fri 5/86:20 am
RDU
- PIA
1 stop4h 44m
United Airlines
Sat 5/92:50 pm
PIA
- RDU
2 stops7h 59m
United Airlines
Deal found 3/30![United Airlines logo]()
$315
This American Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:08 pm
RDU
- PIA
1 stop4h 50m
American Airlines
Sun 6/1412:24 pm
PIA
- RDU
1 stop8h 07m
American Airlines
Deal found 4/2![American Airlines logo]()
$364
This Southwest deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/216:40 pm
RDU
- MDW
Nonstop2h 00m
Southwest
Fri 4/246:55 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 4/2![Southwest logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/198:01 pm
RDU
- RFD
1 stop14h 20m
Multiple Airlines
Fri 5/228:03 pm
RFD
- RDU
1 stop12h 18m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$308
This United Airlines deal was found by Cheapflights users on 3/31. 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.
Thu 7/236:15 am
RDU
- ORD
Nonstop2h 28m
United Airlines
Fri 7/243:40 pm
ORD
- RDU
Nonstop2h 20m
United Airlines
Deal found 3/31![United Airlines logo]()
$317
Last-minute flights from Raleigh to IllinoisDiscover last-minute flight deals from Raleigh to Illinois. Data last updated April 3, 2026 and is based on user searches.
Discover last-minute flight deals from Raleigh to Illinois. Data last updated April 3, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/30. 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 4/166:10 am
RDU
- ORD
1 stop6h 22m
Frontier
Mon 4/202:10 pm
ORD
- RDU
Nonstop2h 07m
Frontier
Deal found 3/30![Frontier logo]()
$168
This Frontier deal was found by Cheapflights users on 3/31. 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.
Thu 4/164:08 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Sun 4/192:37 pm
ORD
- RDU
1 stop4h 51m
Frontier
Deal found 3/31![Frontier logo]()
$170
This Trip.com deal was found by Cheapflights users on 3/30. 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.
Fri 4/173:49 pm
RDU
- MDW
1 stop4h 42m
Frontier
Mon 4/202:15 pm
MDW
- RDU
1 stop7h 45m
Frontier
Deal found 3/30![Frontier logo]()
$170
This Expedia deal was found by Cheapflights users on 3/29. 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.
Mon 4/2010:51 pm
RDU
- STL
1 stop25h 28m
Frontier
Wed 4/224:59 pm
STL
- RDU
1 stop13h 57m
Frontier
Deal found 3/29![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/224:00 pm
RDU
- ORD
2 stops9h 24m
Multiple Airlines
Wed 4/2911:28 am
ORD
- RDU
1 stop11h 15m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$169
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2412:57 pm
RDU
- STL
1 stop11h 22m
Frontier
Mon 4/278:17 pm
STL
- RDU
1 stop21h 27m
Frontier
Deal found 3/31![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/294:00 pm
RDU
- STL
1 stop19h 26m
Frontier
Wed 5/65:27 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 3/30![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Fri 5/13:49 pm
RDU
- STL
1 stop16h 01m
Frontier
Mon 5/48:23 pm
STL
- RDU
1 stop14h 36m
Frontier
Deal found 3/31![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/33:42 pm
RDU
- STL
1 stop16h 08m
Frontier
Wed 5/135:27 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 3/31![Frontier logo]()
$135
This Frontier deal was found by Cheapflights users on 3/31. 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.
Mon 5/412:57 pm
RDU
- STL
1 stop11h 22m
Frontier
Thu 5/76:55 pm
STL
- RDU
1 stop4h 29m
Frontier
Deal found 3/31![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 3/30. 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 5/76:15 am
RDU
- STL
1 stop11h 39m
Frontier
Sat 5/95:27 pm
STL
- RDU
1 stop6h 02m
Frontier
Deal found 3/30![Frontier logo]()
$140
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/87:49 am
RDU
- ORD
1 stop11h 55m
Frontier
Sun 5/1010:32 am
ORD
- RDU
1 stop19h 52m
Frontier
Deal found 3/31![Frontier logo]()
$171
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 April 3, 2026.
Search for one-way flight options from Raleigh to Illinois. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:15 am
RDU
- STL
1 stop27h 40m
Frontier
Deal found 4/3![Frontier logo]()
$64
This Trip.com deal was found by Cheapflights users on 3/31. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:15 am
RDU
- STL
1 stop12h 18m
Frontier
Deal found 3/31![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Tue 6/912:54 pm
RDU
- STL
1 stop5h 36m
Frontier
Deal found 3/29![Frontier logo]()
$69
This Priceline deal was found by Cheapflights users on 3/31. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:51 pm
RDU
- STL
1 stop6h 28m
Frontier
Deal found 3/31![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Fri 5/13:49 pm
RDU
- STL
1 stop16h 01m
Frontier
Deal found 3/31![Frontier logo]()
$71
This Expedia deal was found by Cheapflights users on 3/29. 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 5/1412:54 pm
RDU
- STL
1 stop5h 00m
Frontier
Deal found 3/29![Frontier logo]()
$72
This Kiwi.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:00 pm
RDU
- STL
1 stop15h 50m
Frontier
Deal found 4/2![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/243:49 pm
RDU
- STL
1 stop16h 01m
Frontier
Deal found 4/1![Frontier logo]()
$75
This Expedia deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:52 pm
RDU
- STL
1 stop28h 29m
Frontier
Deal found 4/1![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/3112:54 pm
RDU
- STL
1 stop21h 01m
Frontier
Deal found 3/31![Frontier logo]()
$78
This iWofly deal was found by Cheapflights users on 3/29. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:49 am
RDU
- ORD
1 stop11h 55m
Frontier
Deal found 3/29![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 6/2411:51 am
RDU
- ORD
1 stop9h 04m
Frontier
Deal found 3/30![Frontier logo]()
$93
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 April 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $135 (Kiwi.com) |
One-way from | $64 (Kiwi.com) |
Popular in | February |
Cheapest in | December |
Average price | $307 |
Good round-trip deal | $314 or less |
Good one-way deal | $181 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 April 3, 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 - RFD
RDURFD
Raleigh-Durham
Fri 5/29
8:29 pm-9:21 am
1 stop13h 52m
Chicago Greater Rockford
Mon 6/1
8:03 pm-9:21 am
1 stop12h 18m
$223
RaleighChicago
RDU - RFD
RDURFD
Raleigh-Durham
Tue 5/26
6:31 pm-9:21 am
1 stop15h 50m
Chicago Greater Rockford
Sun 5/31
11:27 am-12:24 am
2 stops11h 57m
$233
Quickest round-trip
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Wed 5/13
6:40 pm-7:40 pm
Nonstop2h 00m
Chicago Midway
Wed 5/20
6:05 pm-8:55 pm
Nonstop1h 50m
$237
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Tue 4/28
1:15 pm-2:49 pm
Nonstop2h 34m
Chicago O'Hare Intl
Wed 4/29
10:50 am-1:58 pm
Nonstop2h 08m
$251
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Sun 5/3
5:18 am-9:56 am
1 stop5h 38m
Chicago Midway
Tue 5/5
10:41 am-3:51 pm
1 stop4h 10m
$257
RaleighChicago
RDU - RFD
RDURFD
Raleigh-Durham
Tue 5/19
8:01 pm-9:21 am
1 stop14h 20m
Chicago Greater Rockford
Thu 5/21
11:27 am-12:24 am
2 stops11h 57m
$263
RaleighChicago
RDU - RFD
RDURFD
Raleigh-Durham
Thu 5/7
10:15 pm-9:59 am
1 stop12h 44m
Chicago Greater Rockford
Sun 5/10
10:37 am-12:24 am
2 stops12h 47m
$271
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Tue 4/28
6:50 am-10:40 am
1 stop4h 50m
Chicago Midway
Wed 4/29
7:40 am-6:05 pm
2 stops9h 25m
$276
RaleighChicago
RDU - RFD
RDURFD
Raleigh-Durham
Tue 5/26
6:21 pm-9:21 am
1 stop16h 00m
Chicago Greater Rockford
Fri 5/29
8:03 pm-9:21 am
1 stop12h 18m
$279
RaleighMoline
RDU - MLI
RDUMLI
Raleigh-Durham
Sat 5/30
10:05 am-3:12 pm
1 stop6h 07m
Moline Quad-City
Sun 6/7
6:34 pm-12:50 am
1 stop5h 16m
$286
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 $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 April 3, 2026.
Unlike in the morning, 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 28, 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 April 3, 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 (8 on average).
How much does it cost to fly round-trip from Raleigh to Illinois?
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 April 3, 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
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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 April 3, 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 April 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$74 | Average$191 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$279 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$147 | Average$328 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$160 | Average$293 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$170 | Average$432 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$305 | FlexibilityNo cancel fee | On-time63% |