To save on the cost of your flight from Shannon to St Louis, book at least 48 days before your planned departure. Booking around this time can save you about 0% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £581 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £581.
Our data shows that March tends to be the cheapest month to fly to St Louis from Shannon. Users have commonly found prices around £598 for the month, but tickets can be as low as £415. Due to multiple factors, prepare for potentially higher prices in July.
At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Shannon and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.
When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Shannon is roughly greater than that of St Louis. You can assume this to be the case over the next 25 days.
With an average temperature of 32 °C, peak weather can be found in July. As a traveller, expect to see changes in flight prices during that period. The temperatures in St Louis are hotter than in Shannon.