Finnair flights from London to St. Louis (LON - STL)
Cheapflights users flying from London to St. Louis on Finnair typically fly into Lambert-St Louis and depart from London Heathrow. Select your dates above for pricing.
Finnair flights from London to St. Louis in 2025
Find detailed information about Finnair flights from London to St. Louis. Explore the options provided by Finnair to plan your journey from London to St. Louis. Data last updated 30 April 2025.
Find Finnair flight deals from London to St. Louis
Cheapest Finnair flights from London to St. LouisExplore the most affordable Finnair flight options available from London to St. Louis. Find the lowest fares with prices last updated on 30 April 2025.
Explore the most affordable Finnair flight options available from London to St. Louis. Find the lowest fares with prices last updated on 30 April 2025.
Travel insights for Finnair flights from London to St. Louis
Get recent, data-driven insights about Finnair flights from London to St. Louis including ideal travel times, pricing trends, and more.
How far ahead should I book a flight from London to St. Louis with Finnair?
Use this chart to determine the optimal time to book a return flight from London to St. Louis. Price data was last updated on 25 April 2025.
Booking with Finnair 13 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from London to St. Louis with Finnair?
Currently, the most affordable month to book a Finnair flight from London to St. Louis in April, with an average price of £474. Conversely, traveling with Finnair from London to St. Louis in August will be the most expensive, with an average cost of £637. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
Rainfall in St. Louis by month
Plan your trip to St. Louis by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 inches per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.
Temperature in St. Louis by month
Plan your trip to St. Louis by taking into account the average temperature totals by month.
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).
Best time to book a flight from London to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from London with our price prediction graph.
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Fly from London to St. Louis on another airline
Consider alternative airlines that service the St. Louis area. Flight routes are based on user searches made on Cheapflights and were last updated on 30 April 2025.
See what others are saying about Finnair
Read reviews and see what other travellers are saying about their experiences with Finnair. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing Finnair for your next flight. Reviews last updated 30 April 2025.
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