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Cheap Flights to Illinois
| Popular in | July | High demand for flights, 33% potential price rise |
| Cheapest in | February | Best time to find cheap flights, 5% potential price drop |
| Average price | £351 | Average for round-trip flights in April 2020 |
| Round-trip from | £249 | From London to Chicago |
Cheapest prices for Illinois flights by month
When is the best time to fly to Illinois?
Choose a month below to see average flight price and weather conditions.
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LON - CHI Price
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£326 - £648
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CHI Temperature
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1 - 29 °C
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CHI Rainfall
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17 - 109 mm
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When is the best time to book flights to Illinois?
Booking 60 days in advance of your planned departure date is, on average, the best time to get cheap flights to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Which day is cheapest to fly to Illinois?
The cheapest flights to Illinois are usually found when departing on a Thursday. The departure day with the highest cost at present is Sunday.
What time of day is cheapest to fly?
Illinois flights can be made cheaper if you choose a flight in the afternoon. Booking a flight in the morning will likely mean higher prices.
Sitting along the banks of the Mississippi River and Lake Michigan, Illinois’s accessible location has for centuries made it an important hub. Historically emigrants from Mexico, Ireland and Poland would make the long journey over in search of work and a new home. Abraham Lincoln was among those who called Illinois home and the state honoured him by naming the small city of Lincoln after him – before he became president.
Most travellers booking flights to Illinois would probably pick Chicago as their city of choice for its renowned restaurant scene and shopping but there’s so much more to see in including 6,900 kilometres of shoreline and more than 50 state parks, making it one of the most scenic states in the US.
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Illinois climate
Illinois’s winters are very cold and long with snow and icy winds from late November through to April. Summers, especially July and August, the weather tends to be hot and humid. The best times to visit is when the weather is perfect, in spring and autumn; tornado season can occur anytime between the months of March and May. Chicago’s summers are humid with highs of 30 degrees (Celsius) or more and its winters are bitterly cold.
When is the best time to fly to Illinois?
Peak Season:
Winter is peak season in Illinois for skiing and snowmobiling. In summer many different festivals take place in Chicago’s parks and neighbourhoods almost every weekend, making it difficult to find a cheap Illinois flight.
Off Season:
The best month to book a cheap Illinois flight is September, which is also the mildest month. Autumn is visually the prettiest time to visit when the temperature is still mild and the foliage is changing. The quietest months in Chicago are from January to March but they can also be the coldest and windiest.
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Getting around Illinois
Public transportation is reliable and taxis are easy to find. Driving is not recommended because of heavy traffic and parking is almost impossible to find. The El, a system operated by The Chicago Transit Authority consists of elevated trains running 24 hours a day. During the summer rush hour a River Bus is available.
