Finnair flights from London to St. Louis (LON - STL)
LON — STL
16 Oct — 23 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
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Cheapest Finnair flights from London to St. Louis
Explore the most affordable Finnair flight options available from London to St. Louis. Find the lowest fares with prices last updated on 16 September 2026.
Thu 15/1007:30 -
2 stops19h 27m
Tue 20/1021:35 -
Nonstop8h 00m
Deal found 15/9£633
Fri 2/1014:25 -
1 stop12h 19m
Fri 16/1021:35 -
Nonstop8h 00m
Deal found 13/9£639
Mon 5/1014:45 -
1 stop12h 12m
Sun 18/1017:27 -
1 stop32h 38m
Deal found 12/9£655
Best Finnair flights from London to St. Louis
Discover carefully curated Finnair flight deals from London to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 September 2026.
Thu 15/1007:30 -
2 stops19h 27m
Tue 20/1012:47 -
1 stop14h 18m
Deal found 15/9£633
Fri 2/1014:25 -
1 stop12h 19m
Fri 16/1021:35 -
Nonstop8h 00m
Deal found 13/9£639
Tue 6/1014:45 -
1 stop15h 34m
Sun 18/1017:27 -
1 stop32h 38m
Deal found 12/9£655
Last-minute Finnair flights from London to St. Louis
Discover last-minute Finnair flight deals from London to St. Louis. Data last updated 16 September 2026 and is based on user searches.
Thu 15/1007:30 -
2 stops19h 27m
Tue 20/1021:35 -
Nonstop8h 00m
Deal found 15/9£633
Fri 2/1014:25 -
1 stop12h 19m
Fri 16/1021:35 -
Nonstop8h 00m
Deal found 13/9£639
Mon 5/1014:45 -
1 stop12h 12m
Sun 18/1017:27 -
1 stop32h 38m
Deal found 12/9£655
One-way Finnair flights to St. Louis
Search for one-way Finnair flight options to St. Louis. Find affordable one-way fares based on user searches. Data last updated 16 September 2026.
Tue 13/1016:25 -
Nonstop9h 05m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 13/9£826
Sun 18/1016:25 -
Nonstop9h 05m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/9£5,562
Mon 21/1211:15 -
1 stop17h 10m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 14/9£7,561
How do most travelers feel about Finnair?
The general consensus from 1,430 Cheapflights users is that Finnair is a 7.6/10. Select your travel dates above for updated prices on flights from London to St. Louis (LON-STL).
Finnair flights from London to St. Louis in 2026
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 16 September 2026.
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.
LON-STL
LHR-STL
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
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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 16 September 2026.
Browse through other Finnair flights departing from London. Flight routes are based on user searches made on Cheapflights and were last updated on 16 September 2026.
If St. Louis is not for you, choose from these other destinations located in North America. Flight routes are based on user searches made on Cheapflights and were last updated on 16 September 2026.
Browse through some of the most popular routes that Finnair offers at this time. Flights are based on user searches made on Cheapflights and were last updated on 16 September 2026.
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 16 September 2026.
The flight from Helsinki to Toronto was very cramped. No leg space and no room to even walk. Very bad experience
8.0
Very Good|Jul 2026
Very limited food provided. Limited drinks, lights out for 10 of 12.30 flights. Very few staff.
2.0
Poor|Jun 2026
Lost our luggage and took two days to get it back. Ruined the trip.
10.0
Wonderful|Jun 2026
Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
10.0
Wonderful|May 2026
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