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OPO (Porto) to STL (St. Louis) Flights $1,269.76

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Cheap OPO to STL Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from Porto to St. Louis (OPO to STL)

Question : Would you be willing to change your travel days if it saved you money?
Answer : For the month of October, the cheapest day to fly is Thursday. Being flexible with your travel days garners even more savings during booking.

Question : How much should a trip from Porto (OPO) to Saint Louis (STL) cost?
Answer : Ranging from $2,359 to $3,607, prices for OPO to STL change much less than the majority of routes from Portugal. The further out you book a route, the more likely you are to save.

Question : How long do most people visit Saint Louis?
Answer : Of course you're not most people, but if you were, you'd stay roughly nine days.

Question : Interested in traveling in the next 30 days and want to get the lowest fare?
Answer : Sep 28th has seen bookings (as of Sep 25th) as cheap as $2,359. That comes in 24% below the average price for this route. Saving now means you'll have more cash in your hand for the trip.