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

Flight FAQs

From St. Louis to Porto

Which airlines flying from Lambert-St Louis to Porto have flexible cancellations due to COVID-19?

United Airlines, Air Canada, and American Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from St. Louis to Porto for under $600 on Cheapflights?

Yes, there are multiple flights from St. Louis to Porto for under $600. The cheapest flight booked recently is on Multiple Airlines for just $590, but on average you can expect to pay $769.

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

Lufthansa, at $650, was found to be the cheapest airline from St. Louis to Porto.Alternate airlines to your destination round-trip include Delta and United Airlines. Users have found that Lufthansa is 23% cheaper than the other options available to this destination.

What are the most popular airlines that fly from St. Louis to Porto?

When booking a flight from St. Louis to Porto, you may want to consider flying on American Airlines, Air Canada or Delta as they are the most popular for this route.

What are the cheapest flights from St. Louis to Porto?

Looking for the cheapest flight from St. Louis to Porto? While on average our users pay $1,341, our data indicates the cheapest price to be $505. The most popular route (Lambert-St Louis - Porto), is priced around $590.