
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $144 (Frontier) |
One-way from | $64 (Expedia) |
Popular in | November |
Cheapest in | August |
Average price | $245 |
Good round-trip deal | $305 or less |
Good one-way deal | $148 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Sat 2/7
9:25 am-11:33 pm
1 stop14h 08m
Lambert-St Louis
Mon 2/9
5:42 pm-3:52 pm
1 stop22h 10m
LouisvilleChicago
SDF - ORD
SDFORD
Louisville Intl
Wed 2/18
10:46 am-1:20 pm
1 stop3h 34m
Chicago O'Hare Intl
Wed 2/25
2:05 pm-9:18 pm
1 stop6h 13m
IndianapolisChicago
IND - ORD
INDORD
Indianapolis
Mon 2/2
7:33 pm-9:44 pm
1 stop27h 11m
Chicago O'Hare Intl
Mon 2/9
12:05 pm-11:26 am
1 stop22h 21m
IndianapolisChicago
IND - ORD
INDORD
Indianapolis
Mon 2/2
12:38 pm-10:46 pm
1 stop11h 08m
Chicago O'Hare Intl
Mon 2/9
5:40 am-11:43 am
1 stop5h 03m
IndianapolisChicago
IND - ORD
INDORD
Indianapolis
Thu 1/22
12:38 pm-10:46 pm
1 stop11h 08m
Chicago O'Hare Intl
Mon 1/26
5:40 am-11:43 am
1 stop5h 03m
CincinnatiSt. Louis
CVG - STL
CVGSTL
Cincinnati Cinci./N. Kentucky
Thu 1/22
5:39 pm-11:33 pm
1 stop6h 54m
Lambert-St Louis
Mon 1/26
10:16 am-11:26 pm
1 stop12h 10m
LouisvilleChicago
SDF - MDW
SDFMDW
Louisville Intl
Sat 1/17
6:30 am-6:55 am
Nonstop1h 25m
Chicago Midway
Sun 1/18
10:00 am-12:15 pm
Nonstop1h 15m
LouisvilleChicago
SDF - MDW
SDFMDW
Louisville Intl
Wed 2/18
10:46 am-6:40 pm
2 stops8h 54m
Chicago Midway
Wed 2/25
9:34 am-8:28 pm
2 stops9h 54m
IndianapolisChicago
IND - ORD
INDORD
Indianapolis
Tue 2/3
5:10 am-9:03 pm
1 stop16h 53m
Chicago O'Hare Intl
Sun 2/8
4:38 pm-12:18 am
1 stop6h 40m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Mon 2/2
4:19 pm-11:33 pm
2 stops31h 14m
Lambert-St Louis
Mon 2/9
5:42 pm-3:52 pm
1 stop22h 10m
Currently, February is the cheapest month in which you can book a flight from Indiana to Illinois (average of $127). Flying from Indiana to Illinois in November is currently the most expensive (average of $194). 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 37% on flights from Indiana to Illinois by exploring options for tickets in the morning.
Travelers seeking maximum savings on their Indiana to Illinois flight should consider departing on Tuesday afternoons 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 USIN to USIL are scheduled on a Sunday (65 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).
Food
Entertainment
Boarding
Comfort
Overall
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Entertainment
Boarding
Comfort
Overall
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Entertainment
Boarding
Comfort
Overall
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Entertainment
Boarding
Comfort
Overall
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Entertainment
Boarding
Comfort
Overall
Crew
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$313 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$160 | Average$250 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$302 | FlexibilityNo cancel fee | On-timeN/A |