
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $134 (Frontier) |
One-way from | $58 (Super.com) |
Popular in | March |
Cheapest in | August |
Average price | $279 |
Good round-trip deal | $290 or less |
Good one-way deal | $148 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
Tue 1/27
5:42 pm-4:30 pm
1 stop21h 48m
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Sun 2/22
4:30 pm-6:51 am
1 stop15h 21m
Lambert-St Louis
Wed 2/25
8:17 pm-5:11 pm
2 stops19h 54m
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Sat 3/14
7:05 pm-8:10 pm
Nonstop2h 05m
Chicago Midway
Mon 3/16
3:45 pm-11:25 pm
1 stop6h 40m
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Thu 2/26
6:15 am-11:54 am
1 stop6h 39m
Chicago O'Hare Intl
Sat 2/28
10:00 am-5:38 pm
1 stop6h 38m
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Tue 2/24
2:53 pm-10:27 pm
1 stop8h 34m
Lambert-St Louis
Sun 3/1
3:49 pm-9:05 am
1 stop16h 16m
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Thu 2/19
5:40 am-6:50 am
Nonstop2h 10m
Chicago Midway
Sat 2/21
6:15 pm-9:05 pm
Nonstop1h 50m
RaleighChicago
RDU - ORD
RDUORD
Raleigh-Durham
Thu 2/12
6:15 am-9:30 am
1 stop4h 15m
Chicago O'Hare Intl
Sat 2/14
10:42 am-1:44 pm
Nonstop2h 02m
RaleighSt. Louis
RDU - STL
RDUSTL
Raleigh-Durham
Sun 2/1
6:10 am-6:51 am
1 stop25h 41m
Lambert-St Louis
Fri 2/6
7:39 pm-6:06 pm
2 stops21h 27m
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Tue 3/3
4:55 pm-6:00 pm
Nonstop2h 05m
Chicago Midway
Sat 3/7
3:00 pm-9:50 pm
1 stop5h 50m
RaleighChicago
RDU - MDW
RDUMDW
Raleigh-Durham
Thu 2/5
10:43 am-10:19 pm
2 stops12h 36m
Chicago Midway
Mon 2/9
5:01 pm-12:11 am
1 stop6h 10m
Currently, January is the cheapest month in which you can book a flight from Raleigh to Illinois (average of $58). 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 29% 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 (32 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | 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$160 | Average$299 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$160 | Average$327 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$173 | Average$411 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$177 | Average$314 | FlexibilityNo cancel fee | On-time63% |