Cheap flights from St. Louis, MO to Helsinki, Finland
Flights starting at $357. Choose between Frontier Airlines, Spirit Airlines, or Finnair to find the best price.
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Tips to know when travelling to Helsinki
Cheapest one-way trip | $492 |
---|---|
Cheapest round-trip | $798 |
Average round-trip | $905 |
Includes rare itinerary | |
Most popular airline | Frontier Airlines |
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The most popular airlines for this route are Frontier Airlines, Spirit Airlines, Finnair, SAS, and Lufthansa. St. Louis and Helsinki have 155 direct flights per week. When you arrive at Helsinki, consider visiting Old Town of Tallinn, and Temppeliaukion Kirkko.
Check-in for a flight from St. Louis to Helsinki
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Finnair | FIN | AY | No | 0 0 |
SAS | SAS | SK | No | 0 0 |
Lufthansa | DLH | LH | No | 0 0 |
Weather in Helsinki
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | -2°C | -5°C |
February | -1°C | -5°C |
March | 0°C | -3°C |
April | 6°C | 1°C |
May | 12°C | 6°C |
June | 17°C | 11°C |
July | 20°C | 14°C |
August | 19°C | 14°C |
September | 15°C | 10°C |
October | 8°C | 5°C |
November | 4°C | 1°C |
December | 0°C | -2°C |
14 day forecast
Frequently asked questions
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