Cheap flights from Porto (OPO) to St. Louis (STL) from $414

Currently, September is the cheapest month in which you can book a flight from Porto to St. Louis (average of $322). Flying from Porto to St. Louis in July is currently the most expensive (average of $377). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

• Can I find flights from Porto to St. Louis for under $3,500 on Cheapflights?

  Yes, there are multiple flights from Porto to St. Louis for under $3,500. The cheapest flight booked recently is on Multiple Airlines for just $3,436, but on average you can expect to pay $3,655.

• What are the cheapest airlines flying from Porto to St. Louis round-trip?

  Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $3,451. Another option worth looking into is United Airlines, starting at $4,021 round trip.

• What does OPO to STL mean?

  OPO stands for Porto Airport, while STL stands for Lambert-St Louis Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

• Can I find deals for flights from Porto to St. Louis that include extra baggage allowance?

  The amount of baggage you can bring on your Porto to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

• Can I find deals on flights from Porto to St. Louis with specific airlines?

  Yes, Cheapflights allows you to browse and filter Porto to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

• Can I find deals for flights from Porto to St. Louis that include hotel bookings?

  Yes. In addition to deals on Porto to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

• How can I find direct flights from Porto to St. Louis?

  After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Porto to St. Louis.

• Can I find deals for business class flights from Porto to St. Louis?

  Yes. Cheapflights offers flight deals from Porto to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

• Can I find deals for flights from Porto to St. Louis that allow pets onboard?

  Many airlines flying from Porto to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

• Can I find deals on last-minute flights from Porto to St. Louis?

  Yes, you can often find last-minute deals on Porto to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

• How recently were the Porto to St. Louis flight deals updated?

  The Porto to St. Louis flight deals you see on this page were last updated on 5/2.