
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $124 (Priceline) |
One-way from | $60 (Trip.com) |
Popular in | March |
Cheapest in | August |
Average price | $257 |
Good round-trip deal | $294 or less |
Good one-way deal | $131 or less |
Fly from
Fly to
Route
Depart
Return
Price
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Thu 1/22
9:36 pm-10:23 am
1 stop13h 47m
Lambert-St Louis
Mon 1/26
5:42 pm-1:59 pm
1 stop19h 17m
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Sat 1/17
7:47 pm-6:25 pm
1 stop23h 38m
Chicago O'Hare Intl
Sat 1/24
7:20 am-11:56 pm
2 stops15h 36m
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Thu 1/22
6:10 am-11:33 pm
2 stops18h 23m
Lambert-St Louis
Mon 1/26
5:42 pm-1:59 pm
1 stop19h 17m
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Sat 3/7
6:15 am-11:58 am
1 stop6h 43m
Chicago O'Hare Intl
Wed 3/11
6:04 am-2:45 pm
1 stop7h 41m
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Fri 3/6
6:15 am-11:49 am
1 stop6h 34m
Chicago O'Hare Intl
Mon 3/9
6:04 am-2:45 pm
1 stop7h 41m
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Sat 1/17
6:15 am-7:25 am
Nonstop2h 10m
Chicago Midway
Sun 1/18
10:15 am-5:20 pm
2 stops6h 05m
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Sun 2/1
9:56 pm-9:21 am
1 stop12h 25m
Lambert-St Louis
Mon 2/9
10:16 am-9:01 pm
1 stop9h 45m
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Fri 2/6
5:22 pm-11:33 pm
1 stop7h 11m
Lambert-St Louis
Sun 2/8
5:42 pm-6:01 pm
2 stops23h 19m
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Wed 2/11
6:15 am-7:44 am
Nonstop2h 29m
Chicago O'Hare Intl
Sat 2/14
10:42 am-1:44 pm
Nonstop2h 02m
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Fri 2/6
6:10 am-10:19 pm
1 stop17h 09m
Chicago Midway
Sun 2/8
1:00 pm-9:01 pm
1 stop7h 01m
Currently, January is the cheapest month in which you can book a flight from Raleigh to Illinois (average of $68). Flying from Raleigh to Illinois in March is currently the most expensive (average of $198). 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.
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.
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.
The most flights from RDU to USIL are scheduled on a Sunday (29 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 on average).
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Food
Comfort
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$76 | Average$188 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$81 | Average$184 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$98 | Average$307 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$161 | Average$338 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$173 | Average$409 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$314 | FlexibilityNo cancel fee | On-time63% |