Currently, the most affordable month to book a Finnair flight from London to St. Louis in November, with an average price of £668. Conversely, traveling with Finnair from London to St. Louis in August will be the most expensive, with an average cost of £852. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
January
£570
February
£545
March
£556
April
£564
May
£587
June
£646
July
£608
August
£671
September
£549
October
£542
November
£526
December
£549
STL Temperature | 0 - 27 °C |
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If weather is an important factor for your trip to St. Louis, 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).
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