Currently, the most affordable month to book a Finnair flight from London Heathrow Airport to Chicago in January, with an average price of £601. Conversely, traveling with Finnair from London Heathrow Airport to Chicago in July will be the most expensive, with an average cost of £782. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
January
£479
February
£495
March
£485
April
£496
May
£514
June
£603
July
£624
August
£571
September
£534
October
£516
November
£497
December
£501
CHI Temperature | -5 - 23 °C |
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If weather is an important factor for your trip to Chicago, 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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).
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