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Cheap Flights from St. Louis to Porto $995.73

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Cheapest Flights from St. Louis to Porto (STL to OPO)

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

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

Question : Looking for the cheapest flight over the next 30 days?
Answer : Mar 19th has seen bookings (as of Feb 20th) as cheap as $1,207. That comes in 62% below the average price for this route. Saving on flight costs means you'll have more cash to spend on your trip.

Question : Do prices fluctuate more for this route than others?
Answer : Flight prices are fluctuating a lot more for this route than the majority of routes from the United States, as they're ranging anywhere from $814 to $4,413. Remember, the sooner you book, the better price you tend to get.

Question : Do travelers from Saint Louis typically stay in Porto for very long?
Answer : The average time spent in Porto by passengers from Saint Louis is 17 days.

Question : Would you be willing to change your travel days if it saved you money?
Answer : The lowest-cost day to fly in March is Tuesday. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.