Distance From St Marys Municipal Airport to Francisco de Sá Carneiro Airport, STQ - OPO Distance

The distance from St Marys Municipal Airport (STQ) to Francisco de Sá Carneiro Airport (OPO) is 3517 miles or 5660 kilometers or 3055 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from St Marys ( United States ) to Porto ( Portugal )?

A one-way nonstop (direct) flight between St Marys and Porto takes around 8 hours 5 minutes.

Estimated flight time from St Marys Municipal Airport, St Marys, United States to Francisco de Sá Carneiro Airport, Porto, Portugal is 8 hours 5 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • STQ - OPO

Kilometers		5660 km
Statute Miles		3517 miles
Nautical Miles		3055 nm
Avg. Time of Flight		8 hours 5 minutes

St Marys Municipal Airport to Francisco de Sá Carneiro Airport Flight Route Map - STQ to OPO Flight Path

Location of St Marys Municipal Airport & Francisco de Sá Carneiro Airport is given below.
Click the map to view St Marys to Porto nonstop flight path and travel direction.

Click to see flight route on Google Map between St Marys, United States and Porto, Portugal. .

Nonstop flight route between St Marys, United States and Porto, Portugal.

Time Difference Between the Airports • STQ - OPO

Time difference between St Marys (United States) and Porto (Portugal) is 5 Hours.
Porto time is 5 Hours ahead of St Marys.

Location	Local Time
St Marys (United States)	2026-06-22, 04:49:04 EDT
Porto (Portugal)	2026-06-22, 09:49:04 WEST

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

St Marys Municipal Airport (STQ / KOYM) St Marys, United States

Destination

Francisco de Sá Carneiro Airport (OPO / LPPR) Porto, Portugal