Opodo lets you search flights to St Louis, MO (STL) all in one place. Compare timings, layovers and fares across every airline flying this route, then sort by journey length or departure time to settle on the best option for you.
Prefer a direct flight? American Airlines flies non-stop from Boston to St Louis, MO.
Frontier Airlines runs a further direct route from Seattle, giving you another option to weigh up.
American Airlines is the airline travellers flying to St Louis, MO pick most, making it a sensible starting point when you compare fares and schedules.
Recently, the best fare found on this route was €52, though the price you see will vary with your travel dates and times.
Add a hotel in St Louis, MO to the same booking to unlock exclusive discounts.