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	£598	Average for round-trip flights in July 2020
Round-trip from	£380	From London to Chicago
One-way from	£205	One-way flight from London to Chicago

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.

Are there currently restrictions on travel to Illinois related to COVID-19?

Travel to Illinois is currently restricted due to COVID-19. The restrictions for Illinois are based on the United States restrictions which are: The United States has restricted the entry of all foreign nationals who have passed through or have been in Austria, Belgium, China, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Iran, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland, or the United Kingdom (excluding overseas territories outside of Europe), in the past 14 days. Starting on May 28, foreign nationals who have passed through or have been in Brazil in the last 14 days will also be restricted from entering the United States. US citizens and permanent residents who have passed through or have been in any of the above countries in the past 14 days may still enter the United States, but must arrive at one of the following airports: Atlanta (ATL), Boston (BOS), Chicago (ORD), Dallas, (DFW), Detroit (DTW), Honolulu (HNL), Los Angeles (LAX), Miami (MIA), New York (JFK or EWR), San Francisco (SFO), Seattle (SEA), and Washington (IAD). Family members of US citizens and permanent residents, and certain other limited categories of visa holders (such as UN staff and diplomats) may also enter. Travelers who are allowed to enter the United States but have passed through or have been in any of the countries named above must quarantine for 14 days once they reach their final destination.. If you are planning to travel to Illinois from an unrestricted area, please consider travel safety tips during this time.

Cheapest prices for Illinois flights by month

January

£360

February

£331

March

£335

April

£351

May

£334

June

£412

July

£428

August

£560

September

£382

October

£351

November

£346

December

£366

At the present moment the cheapest month to fly to Illinois is currently February; with August being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

When is the best time to fly to Illinois?

Choose a month below to see average flight price and weather conditions.

LON - CHI Price	£331 - £640
CHI Temperature	1 - 29 °C
CHI Rainfall	17 - 109 mm

February is typically the best time to fly to Illinois, but there are other times where great deals are available. July tends to be the warmest period in Illinois so if you are looking for sun or warmer climates then look to fly around this time. May is the wettest if you need to factor this in to your plans.

When is the best time to book a flight 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 to Illinois?

Illinois flights can be made cheaper if you choose a flight in the evening. Booking a flight at midday 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.