$59+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Jun 6 — Jun 131
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 May 7, 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 May 7, 2026.
This Frontier deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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.
Tue 5/2612:54 pm
RDU
- STL
1 stop5h 39m
Frontier
Wed 6/35:27 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 5/4![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/228:29 pm
RDU
- STL
1 stop28h 20m
Multiple Airlines
Thu 7/26:31 pm
STL
- RDU
1 stop12h 32m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/1212:10 pm
RDU
- STL
1 stop21h 42m
Frontier
Mon 6/155:06 pm
STL
- RDU
1 stop6h 15m
Frontier
Deal found 5/4![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/712:54 pm
RDU
- STL
1 stop21h 01m
Frontier
Tue 6/168:08 pm
STL
- RDU
2 stops10h 55m
Frontier
Deal found 5/5![Frontier logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/228:29 pm
RDU
- STL
1 stop28h 20m
Multiple Airlines
Fri 7/35:06 pm
STL
- RDU
1 stop13h 57m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$199
This Super.com deal was found by Cheapflights users on 5/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1412:53 pm
RDU
- ORD
Nonstop2h 46m
Frontier
Sun 5/178:39 am
ORD
- RDU
Nonstop2h 19m
Frontier
Deal found 5/2![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Sun 5/315:48 pm
RDU
- MDW
2 stops18h 21m
Frontier
Tue 6/26:00 am
MDW
- RDU
1 stop4h 59m
Frontier
Deal found 5/3![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 6/212:54 pm
RDU
- ORD
1 stop7h 35m
Frontier
Fri 6/54:05 pm
ORD
- RDU
2 stops14h 59m
Frontier
Deal found 5/3![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/1212:10 pm
RDU
- STL
1 stop21h 42m
Frontier
Tue 6/168:08 pm
STL
- RDU
2 stops12h 11m
Frontier
Deal found 5/5![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Wed 6/2412:10 pm
RDU
- ORD
1 stop8h 40m
Frontier
Tue 6/304:59 pm
ORD
- RDU
1 stop15h 20m
Frontier
Deal found 5/2![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Wed 6/310:03 pm
RDU
- MDW
2 stops24h 59m
Multiple Airlines
Tue 6/96:00 am
MDW
- RDU
1 stop17h 29m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$203
This Frontier deal was found by Cheapflights users on 5/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/259:43 am
RDU
- ORD
1 stop10h 17m
Frontier
Wed 8/59:57 pm
ORD
- RDU
1 stop12h 34m
Frontier
Deal found 5/3![Frontier logo]()
$204
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 May 7, 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 May 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/87:53 pm
RFD
- RDU
1 stop12h 26m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$232
This Southwest deal was found by Cheapflights users on 5/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:45 pm
RDU
- MDW
1 stop4h 05m
Southwest
Tue 6/911:25 am
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 5/3![Southwest logo]()
$247
This American Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 7/226:29 pm
RDU
- MLI
2 stops7h 12m
American Airlines
Wed 7/297:00 am
MLI
- RDU
1 stop6h 17m
American Airlines
Deal found 5/6![American Airlines logo]()
$266
This Delta deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 7/226:20 am
RDU
- MLI
1 stop5h 02m
Delta
Wed 7/2911:08 am
MLI
- RDU
1 stop5h 14m
Delta
Deal found 5/6![Delta logo]()
$271
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Sat 6/138:00 am
RDU
- PIA
1 stop6h 57m
United Airlines
Sat 6/202:33 pm
PIA
- RDU
1 stop6h 04m
United Airlines
Deal found 5/2![United Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/57:53 pm
RDU
- RFD
1 stop14h 24m
Multiple Airlines
Mon 6/87:53 pm
RFD
- RDU
1 stop12h 26m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$250
This Southwest deal was found by Cheapflights users on 5/2. 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.
Thu 5/287:45 pm
RDU
- MDW
Nonstop2h 00m
Southwest
Mon 6/16:55 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 5/2![Southwest logo]()
$251
This Delta deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:28 am
RDU
- MDW
1 stop6h 28m
Delta
Mon 6/16:36 pm
MDW
- RDU
1 stop3h 50m
Delta
Deal found 5/6![Delta logo]()
$276
This United Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 7/228:05 am
RDU
- MLI
1 stop5h 31m
United Airlines
Wed 7/296:30 am
MLI
- RDU
1 stop5h 03m
United Airlines
Deal found 5/6![United Airlines logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Sat 6/69:46 am
RDU
- RFD
1 stop25h 51m
Multiple Airlines
Sun 6/1411:27 am
RFD
- RDU
2 stops11h 43m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$261
This Southwest deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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.
Mon 6/17:45 pm
RDU
- MDW
Nonstop2h 00m
Southwest
Thu 6/47:40 am
MDW
- RDU
Nonstop1h 55m
Southwest
Deal found 5/6![Southwest logo]()
$265
This American Airlines deal was found by Cheapflights users on 5/2. 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 6/136:08 pm
RDU
- BMI
1 stop7h 00m
American Airlines
Sat 6/204:22 pm
BMI
- RDU
1 stop6h 22m
American Airlines
Deal found 5/2![American Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:20 am
RDU
- ORD
1 stop4h 19m
Delta
Mon 6/85:30 am
ORD
- RDU
1 stop6h 14m
Delta
Deal found 5/4![Delta logo]()
$285
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Wed 6/108:00 am
RDU
- ORD
Nonstop2h 26m
United Airlines
Thu 6/119:10 am
ORD
- RDU
Nonstop2h 23m
United Airlines
Deal found 5/2![United Airlines logo]()
$287
This Southwest deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 10/65:15 pm
RDU
- MDW
1 stop6h 00m
Southwest
Sat 10/108:15 am
MDW
- RDU
Nonstop2h 00m
Southwest
Deal found 5/6![Southwest logo]()
$271
This American Airlines deal was found by Cheapflights users on 5/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/14:28 pm
RDU
- MLI
2 stops8h 43m
American Airlines
Sat 7/46:08 am
MLI
- RDU
1 stop4h 30m
American Airlines
Deal found 5/3![American Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 6/127:11 pm
RDU
- RFD
1 stop15h 06m
Multiple Airlines
Mon 6/157:53 pm
RFD
- RDU
1 stop12h 26m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$283
This United Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 5/205:26 pm
RDU
- ORD
Nonstop2h 34m
United Airlines
Sun 5/247:45 am
ORD
- RDU
1 stop5h 23m
United Airlines
Deal found 5/6![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 5/285:35 am
RDU
- ORD
2 stops8h 15m
Southwest
Sat 5/303:15 pm
ORD
- RDU
1 stop5h 25m
Southwest
Deal found 5/6![Southwest logo]()
$276
This Delta deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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
- MLI
1 stop6h 00m
Delta
Sat 6/135:17 pm
MLI
- RDU
1 stop6h 25m
Delta
Deal found 5/6![Delta logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 7/3010:36 pm
RDU
- RFD
1 stop10h 13m
Multiple Airlines
Sun 8/211:27 am
RFD
- RDU
2 stops19h 39m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$284
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Wed 6/176:00 am
RDU
- ORD
1 stop4h 36m
United Airlines
Sun 6/216:55 am
ORD
- RDU
Nonstop2h 19m
United Airlines
Deal found 5/2![United Airlines logo]()
$297
This American Airlines deal was found by Cheapflights users on 5/2. 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 7/812:56 pm
RDU
- EVV
1 stop4h 14m
American Airlines
Sat 7/114:35 pm
EVV
- RDU
1 stop4h 20m
American Airlines
Deal found 5/2![American Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 5/2. 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 5/2311:32 am
RDU
- MLI
1 stop6h 05m
Delta
Sat 5/305:17 pm
MLI
- RDU
1 stop6h 06m
Delta
Deal found 5/2![Delta logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Fri 6/58:29 pm
RDU
- RFD
1 stop13h 48m
Multiple Airlines
Sun 6/1411:27 am
RFD
- RDU
2 stops11h 43m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$287
This Southwest deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 8/141:15 pm
RDU
- MDW
Nonstop1h 50m
Southwest
Tue 8/188:35 am
MDW
- RDU
Nonstop2h 00m
Southwest
Deal found 5/5![Southwest logo]()
$297
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 9/97:59 pm
RDU
- ORD
1 stop4h 22m
United Airlines
Sun 9/132:03 pm
ORD
- RDU
Nonstop2h 10m
United Airlines
Deal found 5/5![United Airlines logo]()
$307
This American Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/196:54 am
RDU
- BMI
2 stops8h 22m
American Airlines
Sat 5/235:00 am
BMI
- RDU
1 stop5h 29m
American Airlines
Deal found 5/4![American Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 9/98:20 am
RDU
- MDW
Nonstop1h 50m
Southwest
Sun 9/138:05 am
MDW
- RDU
Nonstop2h 00m
Southwest
Deal found 5/5![Southwest logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 5/5![Multiple Airlines logo]()
$297
Last-minute flights from Raleigh to IllinoisDiscover last-minute flight deals from Raleigh to Illinois. Data last updated May 7, 2026 and is based on user searches.
Discover last-minute flight deals from Raleigh to Illinois. Data last updated May 7, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 5/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1412:53 pm
RDU
- ORD
Nonstop2h 46m
Frontier
Sun 5/178:39 am
ORD
- RDU
Nonstop2h 19m
Frontier
Deal found 5/2![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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.
Tue 5/2612:54 pm
RDU
- STL
1 stop5h 39m
Frontier
Wed 6/35:27 pm
STL
- RDU
1 stop6h 06m
Frontier
Deal found 5/4![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Sun 5/315:48 pm
RDU
- MDW
2 stops18h 21m
Frontier
Tue 6/26:00 am
MDW
- RDU
1 stop4h 59m
Frontier
Deal found 5/3![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 6/212:54 pm
RDU
- ORD
1 stop7h 35m
Frontier
Fri 6/54:05 pm
ORD
- RDU
2 stops14h 59m
Frontier
Deal found 5/3![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Wed 6/310:03 pm
RDU
- MDW
2 stops24h 59m
Multiple Airlines
Tue 6/96:00 am
MDW
- RDU
1 stop17h 29m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Fri 6/512:33 pm
RDU
- ORD
1 stop7h 56m
Frontier
Sat 6/61:29 pm
ORD
- RDU
1 stop9h 57m
Frontier
Deal found 5/2![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/712:54 pm
RDU
- STL
1 stop21h 01m
Frontier
Tue 6/168:08 pm
STL
- RDU
2 stops10h 55m
Frontier
Deal found 5/5![Frontier logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/1212:10 pm
RDU
- STL
1 stop21h 42m
Frontier
Mon 6/155:06 pm
STL
- RDU
1 stop6h 15m
Frontier
Deal found 5/4![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/1212:10 pm
RDU
- STL
1 stop21h 42m
Frontier
Tue 6/168:08 pm
STL
- RDU
2 stops12h 11m
Frontier
Deal found 5/5![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/228:29 pm
RDU
- STL
1 stop28h 20m
Multiple Airlines
Thu 7/26:31 pm
STL
- RDU
1 stop12h 32m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/228:29 pm
RDU
- STL
1 stop28h 20m
Multiple Airlines
Fri 7/35:06 pm
STL
- RDU
1 stop13h 57m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Wed 6/2412:10 pm
RDU
- ORD
1 stop8h 40m
Frontier
Tue 6/304:59 pm
ORD
- RDU
1 stop15h 20m
Frontier
Deal found 5/2![Frontier logo]()
$203
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 May 7, 2026.
Search for one-way flight options from Raleigh to Illinois. Find affordable one-way fares based on user searches. Data last updated May 7, 2026.
This Trip.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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 7/3012:59 pm
RDU
- STL
1 stop5h 38m
Frontier
Deal found 5/6![Frontier logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/116:15 am
RDU
- STL
1 stop12h 15m
Frontier
Deal found 5/4![Frontier logo]()
$62
This WAYA deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/212:54 pm
RDU
- STL
1 stop5h 39m
Frontier
Deal found 5/5![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 5/316:15 am
RDU
- STL
1 stop27h 40m
Frontier
Deal found 5/5![Frontier logo]()
$65
This WAYA deal was found by Cheapflights users on 5/2. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2812:54 pm
RDU
- STL
1 stop5h 39m
Frontier
Deal found 5/2![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Wed 5/2712:26 pm
RDU
- STL
1 stop7h 57m
Frontier
Deal found 5/2![Frontier logo]()
$72
This Priceline deal was found by Cheapflights users on 5/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:23 pm
RDU
- STL
1 stop7h 00m
Frontier
Deal found 5/2![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/2912:33 pm
RDU
- STL
1 stop21h 22m
Frontier
Deal found 5/4![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” 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.
Wed 7/295:30 pm
RDU
- STL
1 stop7h 29m
Frontier
Deal found 5/6![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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.
Wed 6/32:17 pm
RDU
- STL
1 stop10h 40m
Frontier
Deal found 5/4![Frontier logo]()
$96
This Frontier deal was found by Cheapflights users on 5/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2112:59 pm
RDU
- MDW
1 stop10h 09m
Frontier
Deal found 5/3![Frontier logo]()
$101
This Trip.com deal was found by Cheapflights users on 5/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/912:59 pm
RDU
- MDW
1 stop10h 09m
Frontier
Deal found 5/2![Frontier logo]()
$102
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 May 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $190 (Frontier) |
One-way from | $59 (Trip.com) |
Popular in | February |
Cheapest in | December |
Average price | $297 |
Good round-trip deal | $321 or less |
Good one-way deal | $179 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 May 7, 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 6/8
7:53 pm-9:19 am
1 stop12h 26m
$232
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Tue 6/2
6:45 pm-9:50 pm
1 stop4h 05m
Chicago Midway
Tue 6/9
11:25 am-2:15 pm
Nonstop1h 50m
$247
RaleighChicago
RDU - RFD
RDURFD
Raleigh-Durham
Fri 6/5
7:53 pm-9:17 am
1 stop14h 24m
Chicago Greater Rockford
Mon 6/8
7:53 pm-9:19 am
1 stop12h 26m
$250
Quickest round-trip
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Thu 5/28
7:45 pm-8:45 pm
Nonstop2h 00m
Chicago Midway
Mon 6/1
6:55 pm-9:45 pm
Nonstop1h 50m
$251
RaleighChicago
RDU - RFD
RDURFD
Raleigh-Durham
Sat 6/6
9:46 am-10:37 am
1 stop25h 51m
Chicago Greater Rockford
Sun 6/14
11:27 am-12:10 am
2 stops11h 43m
$261
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Mon 6/1
7:45 pm-8:45 pm
Nonstop2h 00m
Chicago Midway
Thu 6/4
7:40 am-10:35 am
Nonstop1h 55m
$265
RaleighMoline
RDU - MLI
RDUMLI
Raleigh-Durham
Wed 7/22
6:29 pm-12:41 am
2 stops7h 12m
Moline Quad-City
Wed 7/29
7:00 am-2:17 pm
1 stop6h 17m
$266
RaleighMoline
RDU - MLI
RDUMLI
Raleigh-Durham
Wed 7/22
6:20 am-10:22 am
1 stop5h 02m
Moline Quad-City
Wed 7/29
11:08 am-5:22 pm
1 stop5h 14m
$271
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Tue 10/6
5:15 pm-10:15 pm
1 stop6h 00m
Chicago Midway
Sat 10/10
8:15 am-11:15 am
Nonstop2h 00m
$271
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Thu 5/28
6:28 am-11:56 am
1 stop6h 28m
Chicago Midway
Mon 6/1
6:36 pm-11:26 pm
1 stop3h 50m
$276
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-MDW
RDU-RFD
RDU-ORD
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-MDW
RDU-RFD
RDU-ORD
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 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 May is currently the most expensive (average of $500). 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 May 7, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 30% 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 May 2, 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 May 7, 2026.
The most flights from RDU to USIL are scheduled on a Monday (36 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 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 May 7, 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.
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
7.9
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 May 7, 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 May 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$74 | Average$194 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$98 | Average$327 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$150 | Average$350 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$160 | Average$293 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$171 | Average$406 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$310 | FlexibilityNo cancel fee | On-time63% |