$52+ 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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ORD
Mar 23 — Mar 301
1 adult, Economy
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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
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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 February 21, 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 February 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 3/174:12 pm
RDU
- STL
1 stop19h 25m
Frontier
Tue 3/2411:27 am
STL
- RDU
1 stop11h 11m
Frontier
Deal found 2/17![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/216:00 am
RDU
- STL
1 stop25h 50m
Frontier
Thu 4/2311:21 am
STL
- RDU
1 stop11h 54m
Frontier
Deal found 2/18![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/216:00 am
RDU
- STL
1 stop25h 50m
Frontier
Sat 4/258:23 pm
STL
- RDU
1 stop11h 00m
Frontier
Deal found 2/18![Frontier logo]()
$159
This Expedia deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:00 am
RDU
- STL
1 stop26h 51m
Frontier
Mon 4/134:59 pm
STL
- RDU
1 stop22h 57m
Frontier
Deal found 2/21![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/144:00 pm
RDU
- STL
1 stop15h 50m
Frontier
Thu 4/1611:25 am
STL
- RDU
1 stop20h 21m
Frontier
Deal found 2/19![Frontier logo]()
$161
This WAYA deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 2/246:25 am
RDU
- ORD
1 stop5h 26m
Frontier
Wed 2/256:02 pm
ORD
- RDU
1 stop5h 09m
Frontier
Deal found 2/18![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 2/286:10 am
RDU
- ORD
1 stop17h 29m
Frontier
Tue 3/109:28 am
ORD
- RDU
1 stop4h 49m
Frontier
Deal found 2/17![Frontier logo]()
$166
This Booking.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:42 pm
RDU
- MDW
1 stop4h 49m
Frontier
Sun 4/192:15 pm
MDW
- RDU
1 stop9h 00m
Frontier
Deal found 2/19![Frontier logo]()
$166
This Priceline deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/93:08 pm
RDU
- ORD
1 stop7h 05m
Multiple Airlines
Tue 3/109:28 am
ORD
- RDU
1 stop4h 49m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 2/286:10 am
RDU
- MDW
1 stop16h 29m
Frontier
Mon 3/96:15 am
MDW
- RDU
1 stop8h 21m
Frontier
Deal found 2/17![Frontier logo]()
$167
This Expedia deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/194:22 pm
RDU
- ORD
Nonstop2h 30m
Frontier
Sun 3/2210:12 pm
ORD
- RDU
1 stop7h 53m
Frontier
Deal found 2/20![Frontier logo]()
$168
This Frontier deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 3/124:22 pm
RDU
- ORD
Nonstop2h 30m
Frontier
Tue 3/179:28 am
ORD
- RDU
1 stop4h 49m
Frontier
Deal found 2/18![Frontier logo]()
$169
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 February 21, 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 February 21, 2026.
This CheapOair deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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.
Wed 4/2210:44 am
RDU
- STL
1 stop13h 35m
Frontier
Sat 4/254:55 pm
STL
- RDU
1 stop14h 01m
Frontier
Deal found 2/17![Frontier logo]()
$171
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/291:15 pm
RDU
- ORD
Nonstop2h 34m
United Airlines
Sun 5/37:15 am
ORD
- RDU
Nonstop2h 07m
United Airlines
Deal found 2/18![United Airlines logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 3/59:53 pm
RDU
- EVV
1 stop22h 13m
Multiple Airlines
Mon 3/97:46 pm
EVV
- RDU
1 stop25h 07m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$185
This Southwest deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 5/121:25 pm
RDU
- MDW
1 stop7h 05m
Southwest
Fri 5/156:55 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 2/18![Southwest logo]()
$187
This Delta deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 4/15:38 am
RDU
- ORD
1 stop4h 32m
Delta
Tue 4/77:10 am
ORD
- RDU
1 stop3h 54m
Delta
Deal found 2/17![Delta logo]()
$197
This American Airlines deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/121:13 pm
RDU
- PIA
1 stop5h 40m
American Airlines
Wed 3/185:15 am
PIA
- RDU
2 stops7h 49m
American Airlines
Deal found 2/17![American Airlines logo]()
$265
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:21 pm
RDU
- ORD
Nonstop2h 34m
United Airlines
Tue 5/196:05 pm
ORD
- RDU
Nonstop2h 08m
United Airlines
Deal found 2/20![United Airlines logo]()
$177
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/293:00 pm
RDU
- ORD
Nonstop2h 36m
United Airlines
Mon 5/47:15 am
ORD
- RDU
Nonstop2h 07m
United Airlines
Deal found 2/18![United Airlines logo]()
$177
This Southwest deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 4/286:40 pm
RDU
- MDW
Nonstop2h 00m
Southwest
Thu 4/306:55 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 2/17![Southwest logo]()
$196
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:44 am
RDU
- MDW
1 stop3h 59m
Delta
Sun 5/36:38 pm
MDW
- RDU
1 stop4h 01m
Delta
Deal found 2/20![Delta logo]()
$197
This Trip.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 2/271:12 pm
RDU
- STL
1 stop23h 29m
Frontier
Mon 3/23:49 pm
STL
- RDU
1 stop21h 09m
Frontier
Deal found 2/17![Frontier logo]()
$198
This Southwest deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 3/256:30 pm
RDU
- MDW
Nonstop2h 05m
Southwest
Mon 3/307:50 am
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 2/18![Southwest logo]()
$196
This United Airlines deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 3/171:27 pm
RDU
- ORD
Nonstop2h 28m
United Airlines
Tue 3/248:50 am
ORD
- RDU
1 stop4h 14m
United Airlines
Deal found 2/17![United Airlines logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 3/116:50 am
RDU
- STL
1 stop4h 47m
Frontier
Fri 3/1312:16 pm
STL
- RDU
1 stop10h 55m
Frontier
Deal found 2/19![Frontier logo]()
$212
This Southwest deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 3/176:00 am
RDU
- ORD
2 stops7h 50m
Southwest
Tue 3/242:40 pm
ORD
- RDU
1 stop6h 30m
Southwest
Deal found 2/17![Southwest logo]()
$202
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 5/1210:41 am
RDU
- ORD
1 stop4h 47m
United Airlines
Fri 5/152:15 pm
ORD
- RDU
Nonstop2h 08m
United Airlines
Deal found 2/18![United Airlines logo]()
$187
This Delta deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 3/125:38 am
RDU
- MDW
1 stop4h 15m
Delta
Sat 3/146:34 pm
MDW
- RDU
1 stop3h 58m
Delta
Deal found 2/19![Delta logo]()
$235
This American Airlines deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 3/176:39 am
RDU
- BMI
1 stop5h 22m
American Airlines
Tue 3/245:00 am
BMI
- RDU
1 stop7h 04m
American Airlines
Deal found 2/17![American Airlines logo]()
$269
This Expedia deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 3/266:00 am
RDU
- STL
1 stop5h 31m
Frontier
Sun 3/294:51 pm
STL
- RDU
1 stop15h 47m
Frontier
Deal found 2/17![Frontier logo]()
$224
This Southwest deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:45 pm
RDU
- MDW
1 stop4h 00m
Southwest
Fri 4/242:40 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 2/17![Southwest logo]()
$206
This Delta deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 4/25:38 am
RDU
- MDW
1 stop4h 15m
Delta
Mon 4/66:34 pm
MDW
- RDU
1 stop3h 58m
Delta
Deal found 2/17![Delta logo]()
$235
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/96:15 am
RDU
- ORD
Nonstop2h 28m
United Airlines
Wed 4/152:10 pm
ORD
- RDU
Nonstop2h 08m
United Airlines
Deal found 2/18![United Airlines logo]()
$196
This CheapOair deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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.
Thu 5/141:22 pm
RDU
- STL
1 stop10h 57m
Frontier
Sun 5/178:12 pm
STL
- RDU
1 stop23h 52m
Frontier
Deal found 2/17![Frontier logo]()
$226
This American Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 3/145:00 am
RDU
- BMI
1 stop7h 01m
American Airlines
Mon 3/165:00 am
BMI
- RDU
2 stops6h 23m
American Airlines
Deal found 2/18![American Airlines logo]()
$274
This Southwest deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/112:00 pm
RDU
- MDW
2 stops8h 30m
Southwest
Fri 4/36:45 pm
MDW
- RDU
Nonstop1h 50m
Southwest
Deal found 2/19![Southwest logo]()
$214
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 3/510:22 am
RDU
- STL
1 stop5h 20m
United Airlines
Sun 3/87:41 am
STL
- RDU
1 stop5h 01m
United Airlines
Deal found 2/19![United Airlines logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2210:16 pm
RDU
- RFD
1 stop12h 05m
Multiple Airlines
Mon 5/258:35 am
RFD
- RDU
1 stop11h 19m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$342
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/61:13 pm
RDU
- MLI
2 stops6h 19m
American Airlines
Mon 3/97:09 pm
MLI
- RDU
1 stop3h 58m
American Airlines
Deal found 2/20![American Airlines logo]()
$284
This CheapOair deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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.
Mon 3/166:00 am
RDU
- STL
1 stop8h 34m
Frontier
Fri 3/204:51 pm
STL
- RDU
1 stop14h 01m
Frontier
Deal found 2/18![Frontier logo]()
$235
This Southwest deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 3/217:20 am
RDU
- MDW
Nonstop2h 05m
Southwest
Tue 3/245:40 pm
MDW
- RDU
1 stop4h 15m
Southwest
Deal found 2/17![Southwest logo]()
$217
Last-minute flights from Raleigh to IllinoisDiscover last-minute flight deals from Raleigh to Illinois. Data last updated February 21, 2026 and is based on user searches.
Discover last-minute flight deals from Raleigh to Illinois. Data last updated February 21, 2026 and is based on user searches.
This WAYA deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 2/246:25 am
RDU
- ORD
1 stop5h 26m
Frontier
Wed 2/256:02 pm
ORD
- RDU
1 stop5h 09m
Frontier
Deal found 2/18![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 2/286:10 am
RDU
- ORD
1 stop17h 29m
Frontier
Tue 3/109:28 am
ORD
- RDU
1 stop4h 49m
Frontier
Deal found 2/17![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 2/286:10 am
RDU
- MDW
1 stop16h 29m
Frontier
Mon 3/96:15 am
MDW
- RDU
1 stop8h 21m
Frontier
Deal found 2/17![Frontier logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 3/25:10 pm
RDU
- ORD
1 stop6h 29m
Multiple Airlines
Thu 3/57:00 am
ORD
- RDU
1 stop6h 13m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:25 am
RDU
- ORD
1 stop5h 26m
Frontier
Sun 3/88:05 am
ORD
- RDU
1 stop24h 38m
Frontier
Deal found 2/20![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 3/46:25 am
RDU
- ORD
1 stop5h 26m
Frontier
Sat 3/74:44 pm
ORD
- RDU
1 stop5h 32m
Frontier
Deal found 2/19![Frontier logo]()
$171
This Priceline deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/93:08 pm
RDU
- ORD
1 stop7h 05m
Multiple Airlines
Tue 3/109:28 am
ORD
- RDU
1 stop4h 49m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$167
This Frontier deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 3/124:22 pm
RDU
- ORD
Nonstop2h 30m
Frontier
Tue 3/179:28 am
ORD
- RDU
1 stop4h 49m
Frontier
Deal found 2/18![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” 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 3/174:12 pm
RDU
- STL
1 stop19h 25m
Frontier
Tue 3/2411:27 am
STL
- RDU
1 stop11h 11m
Frontier
Deal found 2/17![Frontier logo]()
$136
This CheapOair deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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.
Wed 3/188:47 am
RDU
- MDW
1 stop10h 26m
Frontier
Tue 3/244:33 pm
MDW
- RDU
1 stop14h 19m
Frontier
Deal found 2/19![Frontier logo]()
$171
This Expedia deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/194:22 pm
RDU
- ORD
Nonstop2h 30m
Frontier
Sun 3/2210:12 pm
ORD
- RDU
1 stop7h 53m
Frontier
Deal found 2/20![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/2210:38 pm
RDU
- MDW
1 stop16h 43m
Multiple Airlines
Tue 3/247:30 am
MDW
- RDU
1 stop8h 59m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$169
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 February 21, 2026.
Search for one-way flight options from Raleigh to Illinois. Find affordable one-way fares based on user searches. Data last updated February 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/194:22 pm
RDU
- ORD
Nonstop2h 30m
Frontier
Deal found 2/20![Frontier logo]()
$52
This Expedia deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2410:03 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Deal found 2/21![Frontier logo]()
$56
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/159:47 pm
RDU
- ORD
Nonstop2h 29m
Frontier
Deal found 2/20![Frontier logo]()
$57
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 4/103:57 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Deal found 2/19![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” 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 4/248:48 pm
RDU
- MDW
1 stop20h 25m
Frontier
Deal found 2/19![Frontier logo]()
$60
This Trip.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 3/104:12 pm
RDU
- STL
1 stop19h 25m
Frontier
Deal found 2/18![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/135:11 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Deal found 2/19![Frontier logo]()
$62
This WAYA deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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.
Wed 3/116:50 am
RDU
- STL
1 stop4h 47m
Frontier
Deal found 2/18![Frontier logo]()
$64
This Trip.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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.
Mon 3/304:06 pm
RDU
- STL
1 stop19h 26m
Frontier
Deal found 2/18![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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 4/1910:30 pm
RDU
- ORD
Nonstop2h 19m
Frontier
Deal found 2/18![Frontier logo]()
$66
This Trip.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” 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.
Mon 4/63:57 pm
RDU
- STL
1 stop19h 33m
Frontier
Deal found 2/18![Frontier logo]()
$66
This Mytrip deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:25 pm
RDU
- ORD
1 stop6h 57m
Spirit Airlines
Deal found 2/20![Spirit Airlines logo]()
$68
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 February 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $136 (Kiwi.com) |
One-way from | $52 (Kiwi.com) |
Popular in | February |
Cheapest in | October |
Average price | $336 |
Good round-trip deal | $318 or less |
Good one-way deal | $153 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 February 21, 2026.
Use the filters below to find and compare flights from Raleigh to Illinois that are best for you.
Fly from
Raleigh
Fly to
Illinois
Route
Depart
Return
Price
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Wed 4/22
10:44 am-11:19 pm
1 stop13h 35m
Lambert-St Louis
Sat 4/25
4:55 pm-7:56 am
1 stop14h 01m
$171
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Wed 4/29
1:15 pm-2:49 pm
Nonstop2h 34m
Chicago O'Hare Intl
Sun 5/3
7:15 am-10:22 am
Nonstop2h 07m
$177
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Sat 5/16
5:21 pm-6:55 pm
Nonstop2h 34m
Chicago O'Hare Intl
Tue 5/19
6:05 pm-9:13 pm
Nonstop2h 08m
$177
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Wed 4/29
3:00 pm-4:36 pm
Nonstop2h 36m
Chicago O'Hare Intl
Mon 5/4
7:15 am-10:22 am
Nonstop2h 07m
$177
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Tue 3/17
1:27 pm-2:55 pm
Nonstop2h 28m
Chicago O'Hare Intl
Tue 3/24
8:50 am-2:04 pm
1 stop4h 14m
$183
RaleighEvansville
RDU - EVV
RDUEVV
Raleigh-Durham
Thu 3/5
9:53 pm-7:06 pm
1 stop22h 13m
Evansville Dress Regional
Mon 3/9
7:46 pm-9:53 pm
1 stop25h 07m
$185
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Tue 5/12
1:25 pm-7:30 pm
1 stop7h 05m
Chicago Midway
Fri 5/15
6:55 pm-9:45 pm
Nonstop1h 50m
$187
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Tue 5/12
10:41 am-2:28 pm
1 stop4h 47m
Chicago O'Hare Intl
Fri 5/15
2:15 pm-5:23 pm
Nonstop2h 08m
$187
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Tue 4/28
6:40 pm-7:40 pm
Nonstop2h 00m
Chicago Midway
Thu 4/30
6:55 pm-9:45 pm
Nonstop1h 50m
$196
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Wed 3/25
6:30 pm-7:35 pm
Nonstop2h 05m
Chicago Midway
Mon 3/30
7:50 am-10:40 am
Nonstop1h 50m
$196
Showing 1-10 of 60 results
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-ORD
RDU-MDW
RDU-STL
RDU-EVV
RDU-RFD
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Raleigh to Illinois
RDU-USIL
RDU-ORD
RDU-MDW
RDU-STL
RDU-EVV
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 $185). 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 February 21, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 27% on flights from Raleigh to Illinois by exploring options for tickets in the evening.
What is the cheapest day to fly from Raleigh to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Raleigh to Illinois. Price data was last updated on February 21, 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 February 21, 2026.
The most flights from RDU to USIL are scheduled on a Friday (29 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (16 on average).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated February 21, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Raleigh to Illinois. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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 February 21, 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 February 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$70 | Average$191 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$322 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$149 | Average$324 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$160 | Average$293 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$171 | Average$431 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$311 | FlexibilityNo cancel fee | On-time63% |