Fly from
Fly to
Route
Depart
Return
Price
LondonChicago
LTN - ORD
LTNORD
London Luton
Thu 1/16
7:05 am-5:20 pm
2 stops16h 15m
Chicago O'Hare Intl
Wed 1/22
6:30 pm-9:40 pm
2 stops21h 10m
LondonSt. Louis
LTN - STL
LTNSTL
London Luton
Sat 12/7
6:25 am-3:21 pm
3 stops38h 56m
Lambert-St Louis
Wed 12/11
3:45 pm-4:25 pm
2 stops18h 40m
LondonChicago
LTN - ORD
LTNORD
London Luton
Sat 1/18
9:40 pm-5:20 pm
3 stops25h 40m
LondonSt. Louis
LTN - STL
LTNSTL
London Luton
Thu 2/6
6:30 am-9:16 am
2 stops32h 46m
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).