$60+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Aug 7 — Aug 141
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Raleigh to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Raleigh to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Raleigh to IllinoisExplore the most affordable flight options available from Raleigh to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 8, 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 July 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 9/239:59 pm
RDU
- BMI
1 stop11h 28m
Multiple Airlines
Fri 9/255:53 pm
BMI
- RDU
1 stop14h 06m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$209
This Frontier deal was found by Cheapflights users on 7/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/62:31 pm
RDU
- ORD
1 stop9h 39m
Frontier
Sun 8/99:57 pm
ORD
- RDU
1 stop12h 34m
Frontier
Deal found 7/5![Frontier logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 7/2512:04 pm
RDU
- MDW
1 stop10h 59m
Frontier
Sun 8/26:05 am
MDW
- RDU
1 stop16h 59m
Frontier
Deal found 7/3![Frontier logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 7/2911:56 am
RDU
- ORD
1 stop8h 57m
Frontier
Mon 8/31:50 pm
ORD
- RDU
1 stop9h 14m
Frontier
Deal found 7/7![Frontier logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/112:04 pm
RDU
- MDW
1 stop10h 59m
Frontier
Sun 8/26:05 am
MDW
- RDU
1 stop16h 59m
Frontier
Deal found 7/7![Frontier logo]()
$261
This American Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/1210:17 am
RDU
- MLI
1 stop6h 23m
American Airlines
Tue 8/184:05 pm
MLI
- RDU
1 stop5h 48m
American Airlines
Deal found 7/7![American Airlines logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 7/306:14 pm
RDU
- ORD
1 stop14h 39m
Frontier
Sat 8/11:50 pm
ORD
- RDU
1 stop9h 13m
Frontier
Deal found 7/7![Frontier logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 7/286:15 am
RDU
- MDW
1 stop5h 52m
Frontier
Thu 7/3012:11 pm
MDW
- RDU
1 stop10h 53m
Frontier
Deal found 7/7![Frontier logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 9/309:59 pm
RDU
- STL
2 stops20h 45m
Frontier
Fri 10/910:35 am
STL
- RDU
1 stop12h 42m
Frontier
Deal found 7/7![Frontier logo]()
$262
This Expedia deal was found by Cheapflights users on 7/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/301:21 pm
RDU
- ORD
1 stop8h 06m
Frontier
Sun 8/235:46 pm
ORD
- RDU
1 stop26h 18m
Frontier
Deal found 7/6![Frontier logo]()
$263
This Expedia deal was found by Cheapflights users on 7/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/276:15 am
RDU
- MDW
1 stop5h 52m
Frontier
Wed 7/2912:11 pm
MDW
- RDU
1 stop10h 53m
Frontier
Deal found 7/6![Frontier logo]()
$263
This Frontier deal was found by Cheapflights users on 7/3. 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.
Mon 7/277:32 pm
RDU
- STL
1 stop5h 27m
Frontier
Wed 7/294:57 pm
STL
- RDU
1 stop6h 07m
Frontier
Deal found 7/3![Frontier logo]()
$263
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 July 8, 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 July 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 9/239:59 pm
RDU
- BMI
1 stop11h 28m
Multiple Airlines
Fri 9/255:53 pm
BMI
- RDU
1 stop14h 06m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$209
This American Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/1210:17 am
RDU
- MLI
1 stop6h 23m
American Airlines
Tue 8/184:05 pm
MLI
- RDU
1 stop5h 48m
American Airlines
Deal found 7/7![American Airlines logo]()
$261
This Southwest deal was found by Cheapflights users on 7/6. 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.
Sat 8/155:20 pm
RDU
- STL
1 stop4h 20m
Southwest
Tue 8/188:40 am
STL
- RDU
2 stops9h 20m
Southwest
Deal found 7/6![Southwest logo]()
$270
This United Airlines deal was found by Cheapflights users on 7/6. 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 10/146:05 am
RDU
- PIA
1 stop5h 01m
United Airlines
Sat 10/176:15 am
PIA
- RDU
1 stop5h 13m
United Airlines
Deal found 7/6![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 7/4. 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.
Tue 8/187:30 am
RDU
- BMI
1 stop4h 57m
Delta
Tue 8/254:24 pm
BMI
- RDU
1 stop7h 18m
Delta
Deal found 7/4![Delta logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 7/5. 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.
Thu 8/610:34 pm
RDU
- RFD
1 stop10h 15m
Multiple Airlines
Sun 8/911:37 am
RFD
- RDU
2 stops21h 42m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$265
This American Airlines deal was found by Cheapflights users on 7/6. 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.
Tue 8/187:04 am
RDU
- CMI
1 stop5h 07m
American Airlines
Sat 8/226:00 am
CMI
- RDU
1 stop5h 58m
American Airlines
Deal found 7/6![American Airlines logo]()
$270
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 9/16:25 am
RDU
- ORD
Nonstop2h 24m
United Airlines
Wed 9/22:30 pm
ORD
- RDU
Nonstop2h 11m
United Airlines
Deal found 7/7![United Airlines logo]()
$281
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 9/3010:15 am
RDU
- STL
1 stop5h 35m
Southwest
Sat 10/105:00 pm
STL
- RDU
Nonstop1h 50m
Southwest
Deal found 7/7![Southwest logo]()
$288
This American Airlines deal was found by Cheapflights users on 7/6. 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 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 7/6![American Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 7/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:15 pm
RDU
- BMI
1 stop6h 01m
Delta
Tue 8/114:24 pm
BMI
- RDU
1 stop7h 18m
Delta
Deal found 7/5![Delta logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 7/6. 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 8/68:30 pm
RDU
- RFD
1 stop12h 19m
Multiple Airlines
Mon 8/106:26 pm
RFD
- RDU
1 stop14h 34m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 12/21:50 pm
RDU
- STL
1 stop4h 20m
Southwest
Sat 12/58:45 am
STL
- RDU
2 stops9h 45m
Southwest
Deal found 7/7![Southwest logo]()
$297
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/68:05 am
RDU
- ORD
Nonstop2h 26m
United Airlines
Sun 8/96:55 am
ORD
- RDU
Nonstop2h 13m
United Airlines
Deal found 7/7![United Airlines logo]()
$298
This Delta deal was found by Cheapflights users on 7/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:21 am
RDU
- MLI
1 stop6h 04m
Delta
Sun 8/235:09 pm
MLI
- RDU
1 stop6h 33m
Delta
Deal found 7/5![Delta logo]()
$309
This American Airlines deal was found by Cheapflights users on 7/3. 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.
Sun 8/26:24 pm
RDU
- MLI
1 stop7h 17m
American Airlines
Sat 8/88:09 am
MLI
- RDU
1 stop5h 37m
American Airlines
Deal found 7/3![American Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 7/6. 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.
Sun 10/259:46 pm
RDU
- RFD
1 stop13h 08m
Multiple Airlines
Sun 11/110:20 am
RFD
- RDU
2 stops31h 33m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$296
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/66:00 am
RDU
- ORD
1 stop4h 36m
United Airlines
Sun 8/167:11 am
ORD
- RDU
Nonstop2h 16m
United Airlines
Deal found 7/7![United Airlines logo]()
$308
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/46:55 pm
RDU
- MDW
1 stop3h 55m
Southwest
Thu 11/267:10 am
MDW
- RDU
2 stops8h 50m
Southwest
Deal found 7/7![Southwest logo]()
$312
This Delta deal was found by Cheapflights users on 7/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:34 am
RDU
- MDW
1 stop4h 33m
Delta
Sun 10/46:05 am
MDW
- RDU
1 stop4h 21m
Delta
Deal found 7/3![Delta logo]()
$323
This American Airlines deal was found by Cheapflights users on 7/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:41 am
RDU
- BMI
1 stop4h 26m
American Airlines
Wed 8/265:00 am
BMI
- RDU
1 stop6h 48m
American Airlines
Deal found 7/5![American Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/610:34 pm
RDU
- RFD
1 stop10h 15m
Multiple Airlines
Fri 8/76:26 pm
RFD
- RDU
1 stop13h 50m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 7/5. 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 8/51:25 pm
RDU
- MDW
Nonstop1h 50m
Southwest
Mon 8/108:50 am
MDW
- RDU
Nonstop2h 00m
Southwest
Deal found 7/5![Southwest logo]()
$327
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/256:56 am
RDU
- STL
2 stops9h 42m
United Airlines
Sat 8/298:30 am
STL
- RDU
1 stop6h 32m
United Airlines
Deal found 7/7![United Airlines logo]()
$328
This Delta deal was found by Cheapflights users on 7/4. 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.
Tue 8/185:10 pm
RDU
- EVV
1 stop5h 51m
Delta
Tue 8/2510:04 am
EVV
- RDU
1 stop4h 59m
Delta
Deal found 7/4![Delta logo]()
$331
This American Airlines deal was found by Cheapflights users on 7/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/44:15 pm
RDU
- BMI
2 stops9h 20m
American Airlines
Tue 8/111:46 pm
BMI
- RDU
1 stop6h 09m
American Airlines
Deal found 7/5![American Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 10/89:59 pm
RDU
- RFD
1 stop11h 03m
Multiple Airlines
Mon 10/1210:39 am
RFD
- RDU
1 stop22h 21m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$324
This United Airlines deal was found by Cheapflights users on 7/6. 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.
Fri 8/216:55 am
RDU
- ORD
1 stop6h 04m
United Airlines
Tue 8/256:28 pm
ORD
- RDU
Nonstop2h 21m
United Airlines
Deal found 7/6![United Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 7/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/193:50 pm
RDU
- MDW
Nonstop2h 00m
Southwest
Mon 9/216:30 pm
MDW
- RDU
Nonstop1h 55m
Southwest
Deal found 7/4![Southwest logo]()
$337
This Delta deal was found by Cheapflights users on 7/4. 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.
Tue 8/185:10 am
RDU
- MLI
1 stop6h 15m
Delta
Tue 8/2511:08 am
MLI
- RDU
1 stop5h 01m
Delta
Deal found 7/4![Delta logo]()
$339
Last-minute flights from Raleigh to IllinoisDiscover last-minute flight deals from Raleigh to Illinois. Data last updated July 8, 2026 and is based on user searches.
Discover last-minute flight deals from Raleigh to Illinois. Data last updated July 8, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 7/2512:04 pm
RDU
- MDW
1 stop10h 59m
Frontier
Sun 8/26:05 am
MDW
- RDU
1 stop16h 59m
Frontier
Deal found 7/3![Frontier logo]()
$260
This Expedia deal was found by Cheapflights users on 7/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/276:15 am
RDU
- MDW
1 stop5h 52m
Frontier
Wed 7/2912:11 pm
MDW
- RDU
1 stop10h 53m
Frontier
Deal found 7/6![Frontier logo]()
$263
This Frontier deal was found by Cheapflights users on 7/3. 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.
Mon 7/277:32 pm
RDU
- STL
1 stop5h 27m
Frontier
Wed 7/294:57 pm
STL
- RDU
1 stop6h 07m
Frontier
Deal found 7/3![Frontier logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 7/286:15 am
RDU
- MDW
1 stop5h 52m
Frontier
Thu 7/3012:11 pm
MDW
- RDU
1 stop10h 53m
Frontier
Deal found 7/7![Frontier logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 7/2911:56 am
RDU
- ORD
1 stop8h 57m
Frontier
Mon 8/31:50 pm
ORD
- RDU
1 stop9h 14m
Frontier
Deal found 7/7![Frontier logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 7/306:14 pm
RDU
- ORD
1 stop14h 39m
Frontier
Sat 8/11:50 pm
ORD
- RDU
1 stop9h 13m
Frontier
Deal found 7/7![Frontier logo]()
$262
This Expedia deal was found by Cheapflights users on 7/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/301:21 pm
RDU
- ORD
1 stop8h 06m
Frontier
Sun 8/235:46 pm
ORD
- RDU
1 stop26h 18m
Frontier
Deal found 7/6![Frontier logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 7/306:14 pm
RDU
- ORD
1 stop14h 39m
Frontier
Mon 8/241:59 pm
ORD
- RDU
1 stop9h 00m
Frontier
Deal found 7/4![Frontier logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 7/6. 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 7/3112:04 pm
RDU
- MDW
1 stop10h 59m
Frontier
Sat 8/112:11 pm
MDW
- RDU
1 stop10h 52m
Frontier
Deal found 7/6![Frontier logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/112:04 pm
RDU
- MDW
1 stop10h 59m
Frontier
Sun 8/26:05 am
MDW
- RDU
1 stop16h 59m
Frontier
Deal found 7/7![Frontier logo]()
$261
This Frontier deal was found by Cheapflights users on 7/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/62:31 pm
RDU
- ORD
1 stop9h 39m
Frontier
Sun 8/99:57 pm
ORD
- RDU
1 stop12h 34m
Frontier
Deal found 7/5![Frontier logo]()
$260
This American Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/1210:17 am
RDU
- MLI
1 stop6h 23m
American Airlines
Tue 8/184:05 pm
MLI
- RDU
1 stop5h 48m
American Airlines
Deal found 7/7![American Airlines logo]()
$261
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 July 8, 2026.
Search for one-way flight options from Raleigh to Illinois. Find affordable one-way fares based on user searches. Data last updated July 8, 2026.
This Trip.com deal was found by Cheapflights users on 7/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:15 am
RDU
- STL
1 stop12h 22m
Frontier
Deal found 7/5![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 8/26:14 pm
RDU
- STL
1 stop15h 43m
Frontier
Deal found 7/3![Frontier logo]()
$62
This Kiwi.com deal was found by Cheapflights users on 7/3. 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.
Thu 7/306:15 am
RDU
- STL
1 stop27h 42m
Frontier
Deal found 7/3![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 9/36:05 am
RDU
- STL
1 stop12h 17m
Frontier
Deal found 7/7![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 7/316:15 am
RDU
- STL
1 stop27h 42m
Frontier
Deal found 7/3![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 10/64:20 pm
RDU
- STL
1 stop18h 20m
Frontier
Deal found 7/7![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 7/246:15 am
RDU
- STL
1 stop27h 42m
Frontier
Deal found 7/5![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 7/4. 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.
Wed 9/24:02 pm
RDU
- STL
1 stop26h 20m
Frontier
Deal found 7/4![Frontier logo]()
$96
This Trip.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/266:15 am
RDU
- STL
1 stop27h 42m
Frontier
Deal found 7/7![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 7/4. 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.
Wed 8/1211:56 am
RDU
- ORD
2 stops25h 19m
Frontier
Deal found 7/4![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 8/712:04 pm
RDU
- MDW
1 stop22h 47m
Frontier
Deal found 7/3![Frontier logo]()
$128
This Frontier deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 7/295:29 pm
RDU
- ORD
1 stop6h 41m
Frontier
Deal found 7/7![Frontier logo]()
$129
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 July 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $209 (Kiwi.com) |
One-way from | $60 (Trip.com) |
Popular in | February |
Cheapest in | December |
Average price | $316 |
Good round-trip deal | $369 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 July 8, 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
RaleighBloomington
RDU - BMI
RDUBMI
Raleigh-Durham
Wed 9/23
9:59 pm-8:27 am
1 stop11h 28m
Bloomington-Normal
Fri 9/25
5:53 pm-8:59 am
1 stop14h 06m
$209
RaleighMoline
RDU - MLI
RDUMLI
Raleigh-Durham
Wed 8/12
10:17 am-3:40 pm
1 stop6h 23m
Moline Quad-City
Tue 8/18
4:05 pm-10:53 pm
1 stop5h 48m
$261
RaleighChicago
RDU - RFD
RDURFD
Raleigh-Durham
Thu 8/6
10:34 pm-7:49 am
1 stop10h 15m
Chicago Greater Rockford
Sun 8/9
11:37 am-10:19 am
2 stops21h 42m
$265
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Sat 8/15
5:20 pm-8:40 pm
1 stop4h 20m
Lambert-St Louis
Tue 8/18
8:40 am-7:00 pm
2 stops9h 20m
$270
RaleighChampaign
RDU - CMI
RDUCMI
Raleigh-Durham
Tue 8/18
7:04 am-11:11 am
1 stop5h 07m
Champaign University-Willard
Sat 8/22
6:00 am-12:58 pm
1 stop5h 58m
$270
RaleighPeoria
RDU - PIA
RDUPIA
Raleigh-Durham
Wed 10/14
6:05 am-10:06 am
1 stop5h 01m
Greater Peoria
Sat 10/17
6:15 am-12:28 pm
1 stop5h 13m
$277
RaleighPeoria
RDU - PIA
RDUPIA
Raleigh-Durham
Wed 9/2
5:35 pm-10:59 pm
1 stop6h 24m
Greater Peoria
Sat 9/5
4:24 pm-9:46 pm
1 stop4h 22m
$277
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Tue 9/1
6:25 am-7:49 am
Nonstop2h 24m
Chicago O'Hare Intl
Wed 9/2
2:30 pm-5:41 pm
Nonstop2h 11m
$281
RaleighMoline
RDU - MLI
RDUMLI
Raleigh-Durham
Sun 8/2
6:24 pm-12:41 am
1 stop7h 17m
Moline Quad-City
Sat 8/8
8:09 am-2:46 pm
1 stop5h 37m
$285
RaleighChicago
RDU - RFD
RDURFD
Raleigh-Durham
Thu 8/6
8:30 pm-7:49 am
1 stop12h 19m
Chicago Greater Rockford
Mon 8/10
6:26 pm-10:00 am
1 stop14h 34m
$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-RFD
RDU-PIA
RDU-MDW
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-RFD
RDU-PIA
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 July 8, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 25% 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 July 8, 2026.
The most flights from RDU to USIL are scheduled on a Monday (38 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 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 75 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 July 4, 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 evenings 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 July 8, 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
Overall
7.9
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
7.9
Boarding
8.1
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Raleigh to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for Raleigh to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
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 July 8, 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 July 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$73 | Average$196 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$362 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$154 | Average$349 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$160 | Average$299 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$174 | Average$401 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$327 | FlexibilityNo cancel fee | On-time63% |